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Re: 440 - Eddy 750 - Stumble but rich and not lean
[Re: Steve Bryant]
#1611371
04/24/14 11:55 AM
04/24/14 11:55 AM
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Joined: Nov 2003
Posts: 36,040
Lincoln Nebraska
RapidRobert
Circle Track
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Circle Track
Joined: Nov 2003
Posts: 36,040
Lincoln Nebraska
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As you know that eddy 750 may be one of the problematic ones, maybe maybe not and that some eddys have a problem on the idle circuit when running a wild cam. I'm assuming the float levels/psi are OK (not over 5.5). I would bump the timing up to 18-20 & if that stands you can shorten the slots later. Yes you'd want the "cruise" step or a smaller jet (which as you know the jet will change power and cruise) to be giving you a leaner mixture & iirc WOT to be ~12.5. I'd get the idle sorted out first. I ain't giving you much here to work with but it's a BTT for ya to get things started. PS you want the curve to start ~200 RPM above your in gear idle speed. You want the carb in the ballpark then fine tune the timing then fine tune the carb
live every 24 hour block of time like it's your last day on earth
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Re: 440 - Eddy 750 - Stumble but rich and not lean
[Re: Steve Bryant]
#1611373
04/24/14 12:18 PM
04/24/14 12:18 PM
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Joined: Nov 2003
Posts: 36,040
Lincoln Nebraska
RapidRobert
Circle Track
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Circle Track
Joined: Nov 2003
Posts: 36,040
Lincoln Nebraska
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I would get the float/psi out of the way then (1) bump the initial & get it to idle then (2) get the interstate high vacuum cruise ratio correct (I forgot what eBerg recommended) then I ain't sure if you go to the secondaries then come back to the power/AP or if you work on the power/accel pump then the secondaries. You can do it! Maybe this will motivate me to get that bung welded in for my innovate meter. EDIT I believe you dial in the secondarys last
Last edited by RapidRobert; 04/24/14 12:33 PM.
live every 24 hour block of time like it's your last day on earth
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Re: 440 - Eddy 750 - Stumble but rich and not lean
[Re: RapidRobert]
#1611374
04/24/14 12:41 PM
04/24/14 12:41 PM
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Joined: Jun 2006
Posts: 5,161
CT
GTX MATT
master
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master
Joined: Jun 2006
Posts: 5,161
CT
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So its where you want WOT at cruise and its where you want cruise at WOT...
Now I need to pin those needles, got to feel that heat
Hear my motor screamin while I'm tearin up the street
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Re: 440 - Eddy 750 - Stumble but rich and not lean
[Re: Steve Bryant]
#1611377
04/24/14 02:20 PM
04/24/14 02:20 PM
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Joined: Nov 2003
Posts: 36,040
Lincoln Nebraska
RapidRobert
Circle Track
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Circle Track
Joined: Nov 2003
Posts: 36,040
Lincoln Nebraska
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Rick Ehrenberg the Mopar Action editor who has forgotten/misplaced more info than I will ever know posted some ideal A/F ratios to shoot for. the interstate reference was that you would be at a steady RPM/high vacuum/minimum throttle position out on an interstate drive & would be on the "cruise" step of the rod
live every 24 hour block of time like it's your last day on earth
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Re: 440 - Eddy 750 - Stumble but rich and not lean
[Re: Mr.Yuck]
#1611378
04/24/14 02:32 PM
04/24/14 02:32 PM
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Joined: Jan 2003
Posts: 74,977
U.S.S.A.
JohnRR
I Win
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I Win
Joined: Jan 2003
Posts: 74,977
U.S.S.A.
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Quote:
Mopar box will be fine, however I'm not a fan of that eddy carb. If you mush use an Eddy carb go get a 800 thunder.
Mopar box is fine till you hit 4000 rpm , mopar still thinks everyone is using distributors with 34 degrees of mechanical advance .
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Re: 440 - Eddy 750 - Stumble but rich and not lean
[Re: Cab_Burge]
#1611381
04/24/14 03:11 PM
04/24/14 03:11 PM
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Joined: Apr 2011
Posts: 1,520
West Palm Beach, Florida
Copper Dart
pro stock
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pro stock
Joined: Apr 2011
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West Palm Beach, Florida
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INTERESTING  I too noticed black smoke (over rich) at the tail pipes and a bog/stumble from start on med/hard acceleration. Everyone always say lean/poor accelerator pump issues.   stock +/- 383 727 '67 B Eddy #1407 Still with points and condenser.
Common sense, the least common of all the senses.
Mom.
For fear of ridicule, society stifles creativity.
Ricky Valdes
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Re: 440 - Eddy 750 - Stumble but rich and not lean
[Re: Steve Bryant]
#1611386
04/26/14 01:10 AM
04/26/14 01:10 AM
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Joined: Nov 2003
Posts: 36,040
Lincoln Nebraska
RapidRobert
Circle Track
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Circle Track
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Lincoln Nebraska
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You have the psi reduced. The floats set (7/16"). a reasonable amount of initial & it's idling at an acceptable RPM. I'd get the cruise set next. I found some notes not sure where from "12.5-13 for WOT. 14 at idle. 14.5-15.5 at cruise". From Eberg: 12.5-13 at WOT. cruise-14.7-15
live every 24 hour block of time like it's your last day on earth
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Re: 440 - Eddy 750 - Stumble but rich and not lean
[Re: Steve Bryant]
#1611388
04/26/14 05:06 AM
04/26/14 05:06 AM
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Joined: Jan 2007
Posts: 1,668
Mi,U.S.A.
mike s
top fuel
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top fuel
Joined: Jan 2007
Posts: 1,668
Mi,U.S.A.
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Check the rod springs might be too heavy or light.Rods should move at the hit of the throttle.
Last edited by mike s; 04/26/14 11:01 AM.
Leave the gun.......take the Cannoli's....Mike
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Re: 440 - Eddy 750 - Stumble but rich and not lean
[Re: mike s]
#1611389
04/26/14 12:58 PM
04/26/14 12:58 PM
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Joined: Nov 2003
Posts: 36,040
Lincoln Nebraska
RapidRobert
Circle Track
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Circle Track
Joined: Nov 2003
Posts: 36,040
Lincoln Nebraska
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I had misread that the idle was now in spec. I would stay on that/get it right before I moved on to "cruise"
live every 24 hour block of time like it's your last day on earth
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Re: 440 - Eddy 750 - Stumble but rich and not lean
[Re: bee1971]
#1611396
04/27/14 08:21 PM
04/27/14 08:21 PM
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Joined: Apr 2008
Posts: 117
Aus
hysteric
member
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member
Joined: Apr 2008
Posts: 117
Aus
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Quote:
All Classic Symptoms Of The 1407/1411 That You Are Experiencing
With that said , I will keep my negative comments to myself , and the one thousand other negative threads that I could post about the 1407/1411
Good Luck , At Least Your Making Progress
With that said:
Eddie 750 thread on Speedtalk
From what i understand the you are encountering another issue with it going rich. You can also disconnect the accelerator pump and test the transfer slot and see how it runs. You will have to ease into the throttle though but it will still drive just dont do any sudden accelerating as it will bog.
Hope this helps
Hysteric
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Re: 440 - Eddy 750 - Stumble but rich and not lean
[Re: Steve Bryant]
#1611397
04/27/14 10:45 PM
04/27/14 10:45 PM
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Joined: Mar 2006
Posts: 9,825
MI, usa
dvw
master
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master
Joined: Mar 2006
Posts: 9,825
MI, usa
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Quote:
Hysteric, that is an excellent post. Thank you for the link. I am looking at the chart now and I agree that my 440 is far happier with an idle between 11.7-12.6. I get far better vacuum readings with that A/F
My problem is when RPMs increase off-idle, the mixture drops in A/F to 10-11 and I get a stumble in power. After the quick stumble it starts to lean out as it should. I only get this from idle. If I lean the idle mixture to 13-14 then the drop and stumble is not as bad.
On the other end, the power is 1-2 points too lean even with the jet and rod changes and my WOT is still too lean as well. I am hoping some spring changes today may help with those too.
As for the low-end rich stumble, I may replace the nozzle on the accelerator to get a leaner injection to help me get that smooth transition from idle to cruise that is shown in the chart you posted.
Are the metering rods lifting early? Try softer metering rod springs.
Doug
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Re: 440 - Eddy 750 - Stumble but rich and not lean
[Re: bee1971]
#1611398
04/27/14 10:51 PM
04/27/14 10:51 PM
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Joined: Mar 2006
Posts: 9,825
MI, usa
dvw
master
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master
Joined: Mar 2006
Posts: 9,825
MI, usa
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Quote:
Quote:
Hysteric, that is an excellent post. Thank you for the link. I am looking at the chart now and I agree that my 440 is far happier with an idle between 11.7-12.6. I get far better vacuum readings with that A/F
My problem is when RPMs increase off-idle, the mixture drops in A/F to 10-11 and I get a stumble in power. After the quick stumble it starts to lean out as it should. I only get this from idle. If I lean the idle mixture to 13-14 then the drop and stumble is not as bad.
On the other end, the power is 1-2 points too lean even with the jet and rod changes and my WOT is still too lean as well. I am hoping some spring changes today may help with those too.
As for the low-end rich stumble, I may replace the nozzle on the accelerator to get a leaner injection to help me get that smooth transition from idle to cruise that is shown in the chart you posted.
All Classic Symptoms Of The 1407/1411 That You Are Experiencing
With that said , I will keep my negative comments to myself , and the one thousand other negative threads that I could post about the 1407/1411
Good Luck , At Least Your Making Progress
I find it quite comical that you seem to show up on every Edelbrock carb post. Never any helpful tips or information, just that they're terrible. Why do you bother?
Doug
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Re: 440 - Eddy 750 - Stumble but rich and not lean
[Re: dvw]
#1611399
04/27/14 11:59 PM
04/27/14 11:59 PM
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Joined: Feb 2003
Posts: 2,810
Sobieski Wi
bee1971
master
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master
Joined: Feb 2003
Posts: 2,810
Sobieski Wi
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Quote:
Quote:
Quote:
Hysteric, that is an excellent post. Thank you for the link. I am looking at the chart now and I agree that my 440 is far happier with an idle between 11.7-12.6. I get far better vacuum readings with that A/F
My problem is when RPMs increase off-idle, the mixture drops in A/F to 10-11 and I get a stumble in power. After the quick stumble it starts to lean out as it should. I only get this from idle. If I lean the idle mixture to 13-14 then the drop and stumble is not as bad.
On the other end, the power is 1-2 points too lean even with the jet and rod changes and my WOT is still too lean as well. I am hoping some spring changes today may help with those too.
As for the low-end rich stumble, I may replace the nozzle on the accelerator to get a leaner injection to help me get that smooth transition from idle to cruise that is shown in the chart you posted.
All Classic Symptoms Of The 1407/1411 That You Are Experiencing
With that said , I will keep my negative comments to myself , and the one thousand other negative threads that I could post about the 1407/1411
Good Luck , At Least Your Making Progress
I find it quite comical that you seem to show up on every Edelbrock carb post. Never any helpful tips or information, just that they're terrible. Why do you bother?
Doug
Its not my problem that 90% of the Edelbrock posts on this website are directed at the 1407/1411 Series Carbs
And I only state that the 1407/1411s are terrible , so lets clear that up right away
Anyways , to answer your question
To save people alot of headaches , alot of wasted time spent working on something that cant bee fixed without drilling this that and , alot of money also - But I guess guys like you cant read very well - Click on the link that Hysteric posted , some pretty valuable info in there - I could post some more links if you like ??? Chances are you wouldn't read those either ,or just read what you want or might understand - There was a thread a few weeks ago - Even an Edelbrock Tech basically said the very same thing in that thread , Don't you find that kind of comical , An Edelbrock Tech would say such a thing ???
Helpful , its called - EDELBROCK 800 1412/1413 Series or EDELBROCK 650/800 AVS Series !!!
You can thank me later 
Last edited by bee1971; 04/28/14 12:12 AM.
1971 Dodge Charger Superbee
2011 Ram Sport 1500 Quad Cab Deep Water Blue Loaded
Siberian Huskies
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Re: 440 - Eddy 750 - Stumble but AND LEAN LIKE THE REST
[Re: Steve Bryant]
#1611409
04/30/14 10:46 AM
04/30/14 10:46 AM
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Joined: Aug 2013
Posts: 518
Georgia
Steve Bryant
OP
mopar
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OP
mopar
Joined: Aug 2013
Posts: 518
Georgia
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Rod is replaced, storms gave me a break and so I drove about 30 miles yesterday with with some tuning changes and have an update.
As it turns out, I have the same lean condition everyone else has. It appeared intermittently only in first gear and is more predominant with an incline and under a load. My rear drums don't help since they take a second to release.
Secondly, I am lean in cruise mode running between 13.1-14. Lastly, I have determined that I like the metering springs to move SLIGHTLY above cruise so I have nailed down the mid-top settings. Here is my carb changes:
1) Moved the accelerator rod to the top hole. This gives the carb more fuel off-idle and NEARLY solved the lean condition out of first.
2) For now, the Primaries as still Stock 1432 (.110)
3) During power situations (before WOT) I was still running lean (16+) so I changed the secondaries two steps larger - 1433 (.113)
4) To keep the primaries the same and provide even more fuel to the secondaries I moved to Rods - 1458 (75/37) Stock Primary, Richer Secondary
5) With the stock springs I REALLY had to stomp on it to get the A/F to drop down into the 12.5-13 POWER mixture so I change the springs to the Pink 7-in HG
The results are as follows:
Idle: is still in the low 13's. I simply cannot adjust it any leaner without sacrificing too much Vacuum. I am OK with this number.
Off-Idle: May still give me an intermittent lean surge but I will test further and test various pump nozzles. You can see it on the A/F gauge. As you ease out the clutch and give it some gas, the A/F will drop a point as the pump is starting to load and then the A/F will shoot up to about 16 (lean) and then the engine will stumble. More throttle enriches the mixture and all is good. This takes about a second.
Cruise: is a TAD rich. I average about 13.8 depending on load and Vacuum. I am considering moving to a smaller primary jet today to see if I can do something about this. I expect to have to overcompensate the Accelerator Pump if I do this.
Off-Cruise: (slight power) gets me into the 14.1-14.9 range which has a good feel.
Power : So I like the power to kick in before I put the pedal to the floor so I moved to the pink spring. During passing or a more aggressive pedal push the mixture MAY get to 15.5 then it will drop down to around 13 and you can feel the car liking that extra fuel.
WOT : This is really no different than power. Since I moved to a 7 GB spring, the metering opens up at a higher vacuum (lower RPM)so I get power without having to floor it.
I am no carb expert at ALL, but I can tell you that these easy adjustments fit well with the way I spec'ed the engine. I was looking for the HP and torque to come in the 1000-2500 RPM range and so these tweaks with the carb are providing the mixture I need with the cam and intake manifold I chose. Every transition is smooth and without surges or drops in A/F. I will have to make a movie of the transitions so you can see the ups and downs. I need to lean out the low end a little more and then this car will be dialed in.
With the 440 and RPM Intake my 1411 is giving me a slightly rich idle, a fairly consistent off-idle (working on it) a slightly rich cruise (working on it) and a fantastic power circuit.
Today I am going to work on the pump mixture, lean out the cruise and report back. I have a feeling that by leaning out the primaries I will make the lean stumble more predominant but we will see. I really don't want to cruise in full power nor do I want to cruise with a rich mixture.
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Re: 440 - Eddy 750 - Stumble but AND LEAN LIKE THE REST
[Re: Steve Bryant]
#1611412
04/30/14 02:06 PM
04/30/14 02:06 PM
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Joined: Nov 2003
Posts: 36,040
Lincoln Nebraska
RapidRobert
Circle Track
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Circle Track
Joined: Nov 2003
Posts: 36,040
Lincoln Nebraska
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I forgot what numbers we were shootin for (I gotta head out the door ASAP) but the jet will change cruise and power and a rod with a different cruise (same power) will only change the cruise
live every 24 hour block of time like it's your last day on earth
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Re: 440 - Eddy 750 - Stumble but AND LEAN LIKE THE REST
[Re: Cab_Burge]
#1611416
04/30/14 11:00 PM
04/30/14 11:00 PM
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Joined: Jan 2003
Posts: 3,967
S.I. N.Y.
1MYTGTX
master
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master
Joined: Jan 2003
Posts: 3,967
S.I. N.Y.
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Following this thread as I just installed an 800 Thunder on my 440. Right out of the box I had much better throttle response over my 750 vac sec Holley. I am not experiencing any off idle stumbles at all. Only thing I am battling is a "dirty" idle. Has the same eye watering, clothes stinking smell as my Holley did. Only installed it Monday & really didnt do any tuning to it except try & play with mixture screws (didnt really help) Looking forward to more of your updates!
1MYTGTX
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Re: 440 - Eddy 750 - Done. I am happy with result
[Re: Steve Bryant]
#1611426
05/05/14 09:54 PM
05/05/14 09:54 PM
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Joined: Aug 2013
Posts: 518
Georgia
Steve Bryant
OP
mopar
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OP
mopar
Joined: Aug 2013
Posts: 518
Georgia
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OK, I have two updates:
1) I determined that I did not have the correct plate between my carb and the intake. Performer and RPM manifolds require a cover or gasket that covers and seals the additional carb holes on the intake manifold. Part #9266 or #2732. I bought #9266 to help dissipate some of the heat and I noticed far more consistent vacuum at idle and cruise. The A/F doesn't bounce around anymore.
2) A buddy loaned me his AVS 800 and I am sold. Others have said it, Edelbrock recommends it and I am amazed at the difference everyone told me I would see. As soon as I adjusted the idle mixture and speed it cranked up and I would swear I have a different car.
You guys know that I wanted the 1411 to work and it does. I eliminated the lean stumble, I have a mixture that feels great and the numbers look good on the A/F. Having said that, let me try to explain the difference in raw facts.
1) With the 800, releasing the clutch in 1st gear is like any other car. You just release the clutch, period. No feathering and slipping the clutch. It just works, no matter the load no matter the incline.
2) With the 800, the mixture defaulted to perfect. Cruise is pretty solid around 14.2 and when you punch it you get an INSTANT drop down to roughly 11. As RPMs incrase the A/F increases to roughly 15.0 and then the vacuum kicks in and it drops back down into power mode.
For the most part, I think it has to do with the accelerator pump. When there is a load low in gears and at a start, the A/F is down in the 11.5-12.5 range. There are absolutely no lean spikes anywhere in the RPM range. When I replaced the pump nozzle to a 43, it eliminated the stumble but I still noticed quick lean spikes shifting gears or from a start. The nozzle have a good healthy squirt of fuel but as RPM's increased, the transition would still have a quick little spike that you couldn't really feel but it showed up in the gauge.
Nothing like that with the 800. It is smooth, responsive and a night-and-day difference.
Amazing is the only word that comes to mind.
I am a lot smarter now than I would have been if I had bought the 800 first so I have no regrets but I will say that the 800 is cheaper than a 750 with a tuning kit and nozzle kit.
I will respond back with any comments, questions that may arise but I will say that I HAVE SEEN THE LIGHT.
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Re: 440 - Eddy 750 - Done. I am happy with result
[Re: Steve Bryant]
#1611429
05/05/14 11:29 PM
05/05/14 11:29 PM
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Joined: Feb 2003
Posts: 2,810
Sobieski Wi
bee1971
master
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master
Joined: Feb 2003
Posts: 2,810
Sobieski Wi
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Quote:
OK, I have two updates:
1) I determined that I did not have the correct plate between my carb and the intake. Performer and RPM manifolds require a cover or gasket that covers and seals the additional carb holes on the intake manifold. Part #9266 or #2732. I bought #9266 to help dissipate some of the heat and I noticed far more consistent vacuum at idle and cruise. The A/F doesn't bounce around anymore.
2) A buddy loaned me his AVS 800 and I am sold. Others have said it, Edelbrock recommends it and I am amazed at the difference everyone told me I would see. As soon as I adjusted the idle mixture and speed it cranked up and I would swear I have a different car.
You guys know that I wanted the 1411 to work and it does. I eliminated the lean stumble, I have a mixture that feels great and the numbers look good on the A/F. Having said that, let me try to explain the difference in raw facts.
1) With the 800, releasing the clutch in 1st gear is like any other car. You just release the clutch, period. No feathering and slipping the clutch. It just works, no matter the load no matter the incline.
2) With the 800, the mixture defaulted to perfect. Cruise is pretty solid around 14.2 and when you punch it you get an INSTANT drop down to roughly 11. As RPMs incrase the A/F increases to roughly 15.0 and then the vacuum kicks in and it drops back down into power mode.
For the most part, I think it has to do with the accelerator pump. When there is a load low in gears and at a start, the A/F is down in the 11.5-12.5 range. There are absolutely no lean spikes anywhere in the RPM range. When I replaced the pump nozzle to a 43, it eliminated the stumble but I still noticed quick lean spikes shifting gears or from a start. The nozzle have a good healthy squirt of fuel but as RPM's increased, the transition would still have a quick little spike that you couldn't really feel but it showed up in the gauge.
Nothing like that with the 800. It is smooth, responsive and a night-and-day difference.
Amazing is the only word that comes to mind.
I am a lot smarter now than I would have been if I had bought the 800 first so I have no regrets but I will say that the 800 is cheaper than a 750 with a tuning kit and nozzle kit.
I will respond back with any comments, questions that may arise but I will say that I HAVE SEEN THE LIGHT.
Pretty Much Sums What I Have Been Stating Within This Thread (And Got Blasted , I Might Add) And Over The Course Of Many Years , 1407/1411s Are Are Are ####
I Basically Went Through This Many Years Ago With My 1407 , However Without An Sensor, What You Have Done Over The Course Of The Last Few Weeks.
I Played/Tuned Mine Over The Course Of A Month Or More , One Summer
I Had To Learn The Hard Way - And In the End When I Thought I Had It Working Pretty Decent, It Was Still A POS Compared To
Last Wednesday , I Said
"Comparing An Edelbrock 800 Thunder AVS With An Edelbrock 750 Is Like Comparing An Hemi With A Slant Six - The Edelbrock 800 Series Is Night And Day Difference OUT OF THE BOX With The 750 Series
Honestly , No Comparison , 800 Series Is That Good !!!"
What I Should Of Said Was
The Edelbrock 800 Series OUT OF THE BOX , Is Still Night And Day Better Compared With A Highly Modified/Calibrated Edelbrock 750 Series Carb
Now I Wish I Could See Some Dyno/HP #s Compared Between The Two Carbs That You Have
I Am Happy You Have Seen The Light
Last edited by bee1971; 05/06/14 12:22 AM.
1971 Dodge Charger Superbee
2011 Ram Sport 1500 Quad Cab Deep Water Blue Loaded
Siberian Huskies
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Re: 440 - Eddy 750 - Done. I am happy with result
[Re: Steve Bryant]
#1611433
05/06/14 10:17 AM
05/06/14 10:17 AM
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Joined: Apr 2011
Posts: 1,520
West Palm Beach, Florida
Copper Dart
pro stock
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pro stock
Joined: Apr 2011
Posts: 1,520
West Palm Beach, Florida
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Steve, I do have issues with the #1407 Carb. Mostly the major bog on acceleration even with a mild roll on the throttle. I too feel the lean hesitation on light acceleration from idle but it doesn't bother me as much as the bog on any brisk application of the throttle. I've contacted Pep Boy's about an exchange to a different Eddy # carb with no response.
What would be a better # for a Stock '68 383 auto?
Thanks again for your Eye Opening and Informative Post!
Last edited by Copper Dart; 05/06/14 10:20 AM.
Common sense, the least common of all the senses.
Mom.
For fear of ridicule, society stifles creativity.
Ricky Valdes
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Re: 440 - Eddy 750 - Done. I am happy with result
[Re: Steve Bryant]
#1611434
05/06/14 11:25 AM
05/06/14 11:25 AM
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Joined: Jan 2003
Posts: 12,028
Benton, IL.
DaveRS23
Special needs idiot
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Special needs idiot
Joined: Jan 2003
Posts: 12,028
Benton, IL.
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While one CarterBrock may need less work and fewer parts than another to work on our Mopars, none have the features and throttle response of the new Street Demon. I am not calling the CarterBrocks junk, clearly they can be made to work. But the Street Demon's basic design is better. And it has features that the CarterBrocks don't and that results in a better running carb with less work for our engines. With the amount of info currently out there about both the Street Demons and the CarterBrocks, I am surprised that people still buy new CarterBrocks.
Master, again and still
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Re: 440 - Eddy 750 - Done. I am happy with result
[Re: Steve Bryant]
#1611437
05/06/14 12:59 PM
05/06/14 12:59 PM
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Joined: Apr 2011
Posts: 1,520
West Palm Beach, Florida
Copper Dart
pro stock
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pro stock
Joined: Apr 2011
Posts: 1,520
West Palm Beach, Florida
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my only chance to exchange it and not cause trouble at the store is to keep the same brand but a different model #. I am looking at the AVS 650cfm Thunder Series model.  Spoke with the store manager (new store wants to establish a helpful reputation in the Hot Rod community )  I really should have done my homework before the impulse purchase. 
Common sense, the least common of all the senses.
Mom.
For fear of ridicule, society stifles creativity.
Ricky Valdes
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Re: 440 - Eddy 750 - Done. I am happy with result
[Re: Steve Bryant]
#1611440
05/06/14 01:34 PM
05/06/14 01:34 PM
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Joined: Jun 2006
Posts: 5,161
CT
GTX MATT
master
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master
Joined: Jun 2006
Posts: 5,161
CT
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I recommend that you start a thread, get all of the Eddy 750 supporters to pull their money, buy you a good carb, and in exchange one of them can have yours to use every trick up their sleeve to compare it to a real Carter 750, an Eddy 650 or 800, or any Holley 750 and try to get the same power numbers or ET out of it, along with the same crusing A/F ratios, throttle response, etc. 
Last edited by GTX MATT; 05/06/14 01:34 PM.
Now I need to pin those needles, got to feel that heat
Hear my motor screamin while I'm tearin up the street
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Re: 440 - Eddy 750 - Done. I am happy with result
[Re: GTX MATT]
#1611441
05/06/14 01:45 PM
05/06/14 01:45 PM
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Joined: Feb 2003
Posts: 18,582
Rust Belt, SW PA
Silver70
I Live Here
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I Live Here
Joined: Feb 2003
Posts: 18,582
Rust Belt, SW PA
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I just put a edelbrock 1407 on my 413 last week. It replaced a 830 holley with annular downlegs. I basically had the same problems with the holley as this post and the 750 edelbrock fixed it. The 830 no matter what I did, I could get out the sputter on quick acceleration. It was also too rich even with jet changes, power valve, etc... I used to think I knew holleys  I know how frustrating it can be, but the best thing I did was try another carb. Had a 1406 sitting here and it was like an instant fix, but the motor wanted more fuel unlike too much with the 830. Far as et, fuel economy, etc... at this point I don't care about any of that. I'm just happy the car runs good, not pig rich and not sputtering
68 Road Runner, 69 Belvedere, 71 Challenger Vert
340 barracuda, 01 Ram CTD, 95 Ram, 04 Ram, 85 Daytona turbo Z
66 GTO, 06 Magnum RT AWD. 07 Ram CTD, 07 Ram
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Re: 440 - Eddy 750 - Done. I am happy with result
[Re: gdonovan]
#1611443
05/06/14 02:29 PM
05/06/14 02:29 PM
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Joined: Jun 2012
Posts: 1,386
Philadelphia PA
Pynzo
Drugs are bad
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Drugs are bad
Joined: Jun 2012
Posts: 1,386
Philadelphia PA
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I went through some Carter brochures and came up with the original jet/rod combos for the '68-'71 AVS' used on 383s(630cfm) and 440s(750cfm). Comparing these to the Edelbrock out of the box carb jet combos I can see why folks are having trouble dialing these in. First off I'm setting up a '70 383 Magnum 4 speed Super Bee. Stock intake, exhaust manifolds, TTI 2-1/2" exhaust w/ dynomax turbos, MP electronic ignition. I set up an Edelbrock 1405 (.089 primary,65-52rods,7 lb. springs,.095secondary, .028 pump jet)and 1411 (.101 primary, 67-55 rods, .089 secondary, .035 pump jet) to see which would work best for my situation. I used the jetting/rod combos from the original AVS' and had a little trouble dialing in the 1411 so switched to the 1405 with a ported wood spacer(Edelbrock 8723) and am very happy with the results. Plenty of low end power and torque which the 1411 wouldn't deliver on my 383. Wish I still had my '73 New Yorker to mount it on, the Thermo Quad on that 440 was so full of emission junk it never had any power. The 1411 is up for grabs. Anyone wants one pm me. 
Last edited by Pynzo; 05/06/14 07:42 PM.
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Re: 440 - Eddy 750 - Done. I am happy with result
[Re: gdonovan]
#1611444
05/06/14 02:33 PM
05/06/14 02:33 PM
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Joined: Apr 2011
Posts: 1,520
West Palm Beach, Florida
Copper Dart
pro stock
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pro stock
Joined: Apr 2011
Posts: 1,520
West Palm Beach, Florida
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I don't have much experience with Eddelbrock Carbs. Right out of the box the idle mixture was very easy to adjust. It starts right up, hot and cold, and has a very stable idle. My MAIN complaint is the severe bog when opening the secondaries. It may be that a stock '68 383 doesn't breathe enough to get the secondary fuel moving on a #1407 and adding a very tight converter (1100 RPM Stall it seems) to the mix equals a BOG condition with no realistic fix. I'm hoping that with an AVS (Adjustable Valve Secondaries) I may overcome the BOG issues to a tolerable state until a better converter can be installed. P.S. i did install the Mancini Racing Mopar Performance Electronic Ignition upgrade that netted little change on the Bog issue.
Last edited by Copper Dart; 05/06/14 02:58 PM.
Common sense, the least common of all the senses.
Mom.
For fear of ridicule, society stifles creativity.
Ricky Valdes
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Re: 440 - Eddy 750 - Done. I am happy with result
[Re: Silver70]
#1611445
05/06/14 03:24 PM
05/06/14 03:24 PM
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Joined: Jun 2006
Posts: 5,161
CT
GTX MATT
master
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master
Joined: Jun 2006
Posts: 5,161
CT
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Quote:
I just put a edelbrock 1407 on my 413 last week. It replaced a 830 holley with annular downlegs. I basically had the same problems with the holley as this post and the 750 edelbrock fixed it.
The 830 no matter what I did, I could get out the sputter on quick acceleration. It was also too rich even with jet changes, power valve, etc... I used to think I knew holleys
I know how frustrating it can be, but the best thing I did was try another carb. Had a 1406 sitting here and it was like an instant fix, but the motor wanted more fuel unlike too much with the 830.
Far as et, fuel economy, etc... at this point I don't care about any of that. I'm just happy the car runs good, not pig rich and not sputtering
413 with a stock/mild cam?
Now I need to pin those needles, got to feel that heat
Hear my motor screamin while I'm tearin up the street
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Re: 440 - Eddy 750 - Done. I am happy with result
[Re: Pynzo]
#1611446
05/06/14 03:30 PM
05/06/14 03:30 PM
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Joined: Jul 2005
Posts: 1,044
minnesota
president61
super stock
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super stock
Joined: Jul 2005
Posts: 1,044
minnesota
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Quote:
I went through some Carter brochures and came up with the original jet/rod combos for the '68-'71 AVS' used on 383s(630cfm) and 440s(750cfm). Comparing these to the Edelbrock out of the box carb jet combos I can see why folks are having trouble dialing these in. First off I'm setting up a '70 383 Magnum 4 speed Super Bee. Stock intake, exhaust manifolds, TTI 2-1/2" exhaust w/ dynomax turbos, MP electronic ignition.
I set up an Edelbrock 1405 (.089 primary,65-52rods,7 lb. springs,.095secondary, .028 pump jet)and 1411 (.101 primary, 70-47 rods, .089 secondary, .035 pump jet) to see which would work best for my situation. I used the jetting/rod combos from the original AVS' and had a little trouble dialing in the 1411 so switched to the 1405 with a ported wood spacer(Edelbrock 8723) and am very happy with the results. Plenty of low end power and torque which the 1411 wouldn't deliver on my 383. Wish I still had my '73 New Yorker to mount it on, the Thermo Quad on that 440 was so full of emission junk it never had any power. The 1411 is up for grabs. Anyone wants one pm me.
are you sure they had that much cfm (630 and 750?
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Re: 440 - Eddy 750 - Done. I am happy with result
[Re: GTX MATT]
#1611450
05/06/14 08:16 PM
05/06/14 08:16 PM
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Joined: Feb 2003
Posts: 18,582
Rust Belt, SW PA
Silver70
I Live Here
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I Live Here
Joined: Feb 2003
Posts: 18,582
Rust Belt, SW PA
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Quote:
Quote:
I just put a edelbrock 1407 on my 413 last week. It replaced a 830 holley with annular downlegs. I basically had the same problems with the holley as this post and the 750 edelbrock fixed it.
The 830 no matter what I did, I could get out the sputter on quick acceleration. It was also too rich even with jet changes, power valve, etc... I used to think I knew holleys
I know how frustrating it can be, but the best thing I did was try another carb. Had a 1406 sitting here and it was like an instant fix, but the motor wanted more fuel unlike too much with the 830.
Far as et, fuel economy, etc... at this point I don't care about any of that. I'm just happy the car runs good, not pig rich and not sputtering
413 with a stock/mild cam?
It has the bigger summit cam and it has 906 heads, so less compression than a stock 65 engine. It also has one of the 50 dollar ebay stand alone hei style distributors.
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Re: 440 - Eddy 750 - Done. I am happy with result
[Re: Silver70]
#1611452
05/07/14 12:01 PM
05/07/14 12:01 PM
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Joined: Jun 2006
Posts: 5,161
CT
GTX MATT
master
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master
Joined: Jun 2006
Posts: 5,161
CT
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Quote:
Quote:
Quote:
I just put a edelbrock 1407 on my 413 last week. It replaced a 830 holley with annular downlegs. I basically had the same problems with the holley as this post and the 750 edelbrock fixed it.
The 830 no matter what I did, I could get out the sputter on quick acceleration. It was also too rich even with jet changes, power valve, etc... I used to think I knew holleys
I know how frustrating it can be, but the best thing I did was try another carb. Had a 1406 sitting here and it was like an instant fix, but the motor wanted more fuel unlike too much with the 830.
Far as et, fuel economy, etc... at this point I don't care about any of that. I'm just happy the car runs good, not pig rich and not sputtering
413 with a stock/mild cam?
It has the bigger summit cam and it has 906 heads, so less compression than a stock 65 engine. It also has one of the 50 dollar ebay stand alone hei style distributors.
Probably just too much vacuum pulling on the annular boosters, they're sensitive for big cam/low vacuum cars. I've never fiddled with one with annular boosters myself, I kind of want to try one on my engine because it pulls only 9 inches of vacuum at idle, but I don't want to drop 500 bucks and be sorry I did 
Now I need to pin those needles, got to feel that heat
Hear my motor screamin while I'm tearin up the street
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Tune it until you like it, don't be suprised if you get it to lean or to fat before you have it perfect 
