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: 36,041 Lincoln Nebraska
RapidRobert
Circle Track
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Circle Track
Joined: Nov 2003
Posts: 36,041
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: 36,041 Lincoln Nebraska
RapidRobert
Circle Track
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Circle Track
Joined: Nov 2003
Posts: 36,041
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: 5,173 CT
GTX MATT
master
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master
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Posts: 5,173
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: 36,041 Lincoln Nebraska
RapidRobert
Circle Track
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Circle Track
Joined: Nov 2003
Posts: 36,041
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: 75,274 A gulag near you.
JohnRR
I Win
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I Win
Joined: Jan 2003
Posts: 75,274
A gulag near you.
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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: 36,041 Lincoln Nebraska
RapidRobert
Circle Track
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Circle Track
Joined: Nov 2003
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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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