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Re: SIX PACK WON'T IDLE
[Re: Y3 70 BEE]
#116728
10/01/08 10:50 PM
10/01/08 10:50 PM
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Joined: Dec 2007
Posts: 18,157
Mass
DAYCLONA
I Live Here
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I Live Here
Joined: Dec 2007
Posts: 18,157
Mass
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Quote:
Quote:
Y3 70 Bee - the instructions say to install clear sight plugs so the level can be adjusted half way up the port.
He says to remove the lock screw for the float adjustment on top of the needle and seat and run the car. If you do that fuel will come out of the top where the lock screw was. I usually just back off the screw a bit and turn the 5/8 nut some gas will come out a bit, and watch those gaskets on the adjusting nut they dont last long. So what does that have to do with the clear sight glass?
Sorry Bob,.....I mistakingly said to remove the "lock screw", rather than to just loosen the lock screw......when I wrote that post,.....it was late, I was tired, and simply trying to help a member with some info.....and you know how it goes,...one thing leads to another,...to another,...and before you know it,...your writing a small mini-novel  ......but post like these help bring out everyones experience and helpful insights 
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Re: SIX PACK WON'T IDLE
[Re: RATTRAP]
#116729
10/02/08 08:12 AM
10/02/08 08:12 AM
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Anonymous
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Quote:
pic1
hey ratrap, what jets are you running in those promax plates? Promax suggested 84's but I thought I read that many people are running 78's or 80's in their outboards
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Re: SIX PACK WON'T IDLE
[Re: 62maxwgn]
#116731
10/02/08 10:00 AM
10/02/08 10:00 AM
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Anonymous
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Quote:
Not sure why Promax would recommend .084 when stock is .089 front,and .086 rear diaphragm side /.093 linkage side.Also does the Promax plate heve a provision for a removable/adjustable idle feed restriction ?
this for a 340 6bbl (stroked to 416).
and yes, the plate does have adjustable idle feed restrictions but I cant recall what size they are (.031 comes to mind but Im not sure. that could have been the main well restrictions- I will look tonight)
what would you recommend for a 416 with a solid cam 265/276 lift, 245/250 at .050???
I did find the ol 6 pack tuning tips that says:
340-6 bbl. on Aluminum Edelbrock
A "HOT" Manifold with Air Cleaner
Throttle Side Diaphragm Side
Front Carburetor PVCR .086 .073
Center Carburetor Jet #63 #63
PVCR .046 .046
Rear Carburetor PVCR .086 .073
Above must have a nozzle #Rl738 installed in the diaphragm side of both the front and rear carburetors.
A "COLD" Manifold with Air Cleaner
Throttle Side Diaphragm Side
Front Carburetor PVCR .086 .073
Center Carburetor Jet #64 #64
PVCR .046 .046
Rear Carburetor PVCR .086 .073
are the PVCR's listed about the same as the jet sizes I'd be using?
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Re: SIX PACK WON'T IDLE
#116732
10/02/08 10:15 AM
10/02/08 10:15 AM
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after more searching I found this article on the 440 six pack http://www.moparmusclemagazine.com/techarticles/mopp_0801_mopar_six_pack_tuning/index.htmlwhere it says Quote:
As expected, when the car was hooked up to the O2 meter, it showed the carburetors were running a little lean and some adjustments needed to be made. The center carburetor was not that far off-just one size up, from a 65 jet size to a 66. But the outboard carburetors jumped from a staggered 78/82 configuration to 84s at all four locations. Now when you mash the pedal on this big-block, it shows no signs of timidity. It just goes!
so thats probably where they got it from
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Re: SIX PACK WON'T IDLE
#116733
10/02/08 11:53 PM
10/02/08 11:53 PM
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I measured my metering plates for my outboards (340 6 bbl) and got .072 for the passenger side and .084 for the drivers side. those equals a #69 and #76 jets.
since its stroked to 416 AND the 440 6bbls are .089 (a #79 jet) to .093 (#82 jet)front to back, I think 84's might be a good place to start.
anyone know if staggering the jets is worth it. the factory had the staggered and the mopar tuning tips stagger them as well.
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Re: SIX PACK WON'T IDLE
#116734
10/04/08 10:41 AM
10/04/08 10:41 AM
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Re: SIX PACK WON'T IDLE
#116736
10/05/08 01:21 PM
10/05/08 01:21 PM
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Joined: Nov 2006
Posts: 511
Jasper, Indiana
fastnos
mopar
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mopar
Joined: Nov 2006
Posts: 511
Jasper, Indiana
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on a side note, If anyone is looking for a smaller air cleaner there is one listed on ebag now. It clears the underhood frames on A-bodies and show a lot more of your 6-packs and intake. Mopar Tri Power Mr Norm 440 Air Cleaner #300263972064 Buy-it-now $400 Last spring I bought mine for $250+shipping and no air filter. Saw a few around at car swap/shows for $250-350 this summer. This is the kind that Mr. Norm put on 340 GS Demons (not 440, if I'm reading the Ebag ad right.) 
A True Hybrid: Burns Gas AND Rubber!
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Re: SIX PACK WON'T IDLE
[Re: RATTRAP]
#116737
10/07/08 05:36 PM
10/07/08 05:36 PM
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Joined: Jan 2007
Posts: 531
Charlotte, NC
Kowal
mopar
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mopar
Joined: Jan 2007
Posts: 531
Charlotte, NC
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Throttle plates drilling.
All six, just the center? How big did you go?
'69 Hemi Charger 500, ‘70 U code Challenger R/T (These and a bunch others at www.dkowal426.com) P.J. O'Rouke: "The old car ran perfectly, right up until it didn't."
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Re: SIX PACK WON'T IDLE
[Re: RATTRAP]
#116739
10/07/08 09:06 PM
10/07/08 09:06 PM
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Joined: Jan 2007
Posts: 531
Charlotte, NC
Kowal
mopar
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mopar
Joined: Jan 2007
Posts: 531
Charlotte, NC
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Anyone else drilling out throttle plates on a vacuum set up?
'69 Hemi Charger 500, ‘70 U code Challenger R/T (These and a bunch others at www.dkowal426.com) P.J. O'Rouke: "The old car ran perfectly, right up until it didn't."
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Re: SIX PACK WON'T IDLE
[Re: Kowal]
#116740
10/08/08 08:18 AM
10/08/08 08:18 AM
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ive always heard it just the center carb. the outboards already have a small hole in them.
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Re: SIX PACK WON'T IDLE
[Re: 62maxwgn]
#116742
10/08/08 09:22 AM
10/08/08 09:22 AM
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Joined: Jun 2004
Posts: 6,780
Alabama
Mopar-Al
master
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master
Joined: Jun 2004
Posts: 6,780
Alabama
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Quote:
Well,72 replys to this thread.Ever wonder why this stuff worked when it was new?  Sometimes you can't see the forest for the trees. 
I was just asking myself the same thing when I read this. My 6pk is a 70 model. I have zero problems with it. No bogs, no idle problems. I rebuilt it myself. It wasnt' abused before I got it and was complete. I run a slightly bigger cam...275 hl ex and the stock 70 compression.
Maybe something is being over looked.
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Re: SIX PACK WON'T IDLE
[Re: Mopar-Al]
#116743
10/08/08 10:56 AM
10/08/08 10:56 AM
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with a slightly bigger cam there usually no issues.
my cam is 250 duraration at .050 and .575 lift. vacuum is in the dumpers measuring about 7-8" in gear. does that explain why they need some massaging?
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Re: SIX PACK WON'T IDLE
#116744
10/08/08 10:27 PM
10/08/08 10:27 PM
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Joined: Nov 2004
Posts: 1,760
Port Alberni, British Columbia
MoparDonny
top fuel
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top fuel
Joined: Nov 2004
Posts: 1,760
Port Alberni, British Columbia
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Quote:
with a slightly bigger cam there usually no issues.
my cam is 250 duraration at .050 and 275 lift. vacuum is in the dumpers measuring about 7-8" in gear. does that explain why they need some massaging?
Relatively stock engines will likely be fine, depends what you see as fine though. My Dad had zero problems with his 6pak till the 509 cam went into the 440. even then it wasn't too bad. The real challenge to tuning came with the 496 stroker and a 251 @ .050 and .570 lift cam.
I have drilled out the primary butterflies to 1/8 inch and given him about 18 degrees initial and 34 total timing but the timing is all in at 1000 RPM or a tad less. I believe he has a 55 powervalve with jets being 64 or 66 middle carb, and about 84's in the ends. Can't remember if he stagered them or notThe other thing was a 50cc acc pump and put the pump cam in the #2 position to move more shot into the 1/2 to 3/4 throttle range. We have tried all the springs Holley has for the secondaries but have ended up running Purples (one step heavier than stock IIRC) which has resulted in best times so far but that is in a 3700 lb Challenger and driver with 4.10's and 29 inch tires. We are still playing with it but right now it seems to work Excellent.
P.S. , If "Cab Burge" gives you advice, listen to him, he knows these carbs VERY well.
Don.
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Re: SIX PACK WON'T IDLE
[Re: MoparDonny]
#116745
10/09/08 10:19 AM
10/09/08 10:19 AM
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Anonymous
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fixed my typo. supposed to be .575 lift and not 275
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Re: SIX PACK WON'T IDLE
[Re: jcastle1]
#116746
10/20/08 08:00 AM
10/20/08 08:00 AM
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Quote:
Sorry for hi-jacking this thread,but I'm going thru a similar problem with my six bbl setup.
I have 9" vacuum and after reading this thread thought maybe I would change power valve because car don't want to idle,it also will water your eyes.The idle seems to flux around after being fully warmed up-either goes from 650rpm to 1300 rpm.So I changed to a 4.5 PV last nite (1/2 vacuum).Idle seems much improved now.still waters eyes.If I cover center carb for a sec.with hand and let go ,it will rise high in rpm.Is that normal?sprayed carb cleaner all around,can't find a leak.Jets are 70's in center.Should I jet down by 2?Should I buy new valley pan?
70's in the center seem too big. the common jet size is 64 for stockers and possibly 66's for big cams. I have 66's in mine and they maybe a tad big.
Im still sorting thru it all and need to make a few passes and check the plugs for sure.
what I would really want is a wideband O2 sensor....
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