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Re: 440 Fires up - runs nice @ high RPM BUT will not idle.
[Re: ThermoQuad]
#1530474
11/11/13 11:26 AM
11/11/13 11:26 AM
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Joined: Feb 2005
Posts: 28,312
Cincinnati, Ohio
Challenger 1
Too Many Posts
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Too Many Posts
Joined: Feb 2005
Posts: 28,312
Cincinnati, Ohio
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Quote:
Attention all those whom have posted trying to help...did you direct the OP to the six pak tuning guide, with the recommendation to read it and then apply it...or did you provide haphazard guesses to fixing the problem?
Just wondering... 
It sure helped me a bunch as I read it like 4 times before touching my car. If he's new to 6 paks, he sure should have read it before starting the car as the carbs need adjustments when new.
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Re: 440 Fires up - runs nice @ high RPM BUT will not idle.
[Re: Mr.Yuck]
#1530475
11/11/13 11:28 AM
11/11/13 11:28 AM
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Joined: Feb 2005
Posts: 28,312
Cincinnati, Ohio
Challenger 1
Too Many Posts
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Too Many Posts
Joined: Feb 2005
Posts: 28,312
Cincinnati, Ohio
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Quote:
"and the engine vacuum has no bearing on the end carbs opening..as they opened based on the center carb...not the engine..."
perhaps, as the linkage has to be "open" for the blades to open, but if you say have a 6.5 PV and the vac drops to 3-4 it's not going to run right.
I tuned my 6-pack out of the box like this... unhooked the outboards, turn the mixture screws all the way in then back out 1 turn, turn the idle screw up to about 2200, unhooked vac advance, fired the motor, let it warm up set advance to 38* in at 2200, brought the idle back down to 900 or so, set mixture screws for best vac reading, hooked up the outboards and went for a blast. However if you have a vacuum leak, that's not going to work.
The out board carbs need to have the idle mixture tuned, otherwise it'll be too rich at idle from my experience.
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Re: 440 Fires up - runs nice @ high RPM BUT will not idle.
[Re: MASSMOPAR]
#1530476
11/11/13 11:36 AM
11/11/13 11:36 AM
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Joined: Feb 2005
Posts: 28,312
Cincinnati, Ohio
Challenger 1
Too Many Posts
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Too Many Posts
Joined: Feb 2005
Posts: 28,312
Cincinnati, Ohio
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Quote:
Quote:
Big time vacuum leak ?
YUP --
We think it may be the center carb is defective.
There's nothing wrong with the center carb, the whole thing needs to be tuned is my bet or installed correctly.
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Re: 440 Fires up - runs nice @ high RPM BUT will not idle.
[Re: elmor353]
#1530478
11/13/13 02:18 PM
11/13/13 02:18 PM
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Joined: Feb 2003
Posts: 12,675
Columbia, CT
moper
I Live Here
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I Live Here
Joined: Feb 2003
Posts: 12,675
Columbia, CT
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I'll toss in to check the outboards are closed at idle. Some gaskets hang into the bores and the blades will catch and hang.
and x6 or 7 on the tuning it properly. Set timing curve, then tune center carb, then all three.
Well, art is art, isn't it? Still, on the other hand, water is water! And east is east and west is west and if you take cranberries and stew them like applesauce they taste much more like prunes than rhubarb does. Now, uh... Now you tell me what you know.
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Re: 440 Fires up - runs nice @ high RPM BUT will not idle.
[Re: PHJ426]
#1530481
11/15/13 02:59 PM
11/15/13 02:59 PM
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Joined: Apr 2005
Posts: 12,271
Overpriced Housing Central
RobX4406
I Live Here
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I Live Here
Joined: Apr 2005
Posts: 12,271
Overpriced Housing Central
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If you are running an MSD distributor that uses bushings to alter mechanical advance, I have some that are 10 and 14* so you can get more initial timing. That 509 cam will want a lot of initial timing if it's anything like the others, more than 16* and more like 20+. Last one I tuned wanted to be locked out at 36*. Probably idle around 950-1000 rpm. Find the point at which your engine kicks back on the starter or cranks very hard when warmed up. That's your initial timing limit. Then start tuning it up. Should start quickly with no multiple cranking. The tech section tuning guide is a great resource! 
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Re: 440 Fires up - runs nice @ high RPM BUT will not idle.
[Re: ThermoQuad]
#1530482
11/15/13 10:16 PM
11/15/13 10:16 PM
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Joined: Nov 2005
Posts: 3,456
Fly Over States
PHJ426
master
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master
Joined: Nov 2005
Posts: 3,456
Fly Over States
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Quote:
Attention all those whom have posted trying to help...did you direct the OP to the six pak tuning guide, with the recommendation to read it and then apply it...or did you provide haphazard guesses to fixing the problem?
Just wondering...
Certainly,
He needs to read the Six Pack guide, understand it....then apply it.
There is nothing like a well tuned 6 pack.
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