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Re: Need help tuning mild 440
[Re: Prodart440]
#146731
11/07/08 07:23 PM
11/07/08 07:23 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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If the throttle blades are opened far enough to where you are into the transition slots could the PV being open be making you too rich since you are partly into the main circuit at that point
live every 24 hour block of time like it's your last day on earth
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Re: Need help tuning mild 440
[Re: 383man]
#146734
11/07/08 11:58 PM
11/07/08 11:58 PM
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Joined: Jan 2004
Posts: 27,347
Today? Who Knows?
1_WILD_RT
Management Trainee
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Management Trainee
Joined: Jan 2004
Posts: 27,347
Today? Who Knows?
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Quote:
Remeber if the P/V diaphram is blown it will pull fuel right into the intake. Ron
Yes it will... 
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Re: Need help tuning mild 440
[Re: Blown_Hemi]
#146735
11/08/08 03:11 AM
11/08/08 03:11 AM
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Joined: Nov 2005
Posts: 836
lancaster, new york
macmic87
super stock
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super stock
Joined: Nov 2005
Posts: 836
lancaster, new york
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Quote:
Bump the inital timing up to 16º to 18º and have the total timing at 36º to 38º all in by 2500 RPM's. That shoul help your vacuum. Then adjust your carb from there. Always get your timing straightened out first then tune your carb.
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Re: Need help tuning mild 440
[Re: JimG]
#146736
11/08/08 05:23 PM
11/08/08 05:23 PM
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Joined: Jan 2003
Posts: 292
Atlanta
DartGTX
enthusiast
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enthusiast
Joined: Jan 2003
Posts: 292
Atlanta
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I completely AGREE with drilling the holes. The 750 DP I put on my car in 2001 has a 3/16th hole in ALL 4 throttle blades. I haven't had to touch it since installation and it idles at 1050 in P/N and 800 in gear. BTW, I used a power valve PLUG to aleviate the chance of EVER having one blow again. Good luck 
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Re: Need help tuning mild 440
[Re: 1_WILD_RT]
#146737
11/09/08 10:30 AM
11/09/08 10:30 AM
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Joined: Jan 2003
Posts: 27,421
Balt. Md
383man
Too Many Posts
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Too Many Posts
Joined: Jan 2003
Posts: 27,421
Balt. Md
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Quote:
Quote:
Remeber if the P/V diaphram is blown it will pull fuel right into the intake. Ron
Yes it will...
Sounded like you needed to know that. Ron
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Re: Need help tuning mild 440
[Re: 383man]
#146738
11/10/08 12:00 AM
11/10/08 12:00 AM
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Joined: Aug 2003
Posts: 848
Avondale AZ
Prodart440
OP
super stock
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OP
super stock
Joined: Aug 2003
Posts: 848
Avondale AZ
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So I was playing with the timing the other night, and I forgot to hook up the vacuum advance. The car seemed to run the same, but without the problems of it pinging when I get on it. I set the initial timing at about 12*. I still don't know what and when the total timing is and when it is in.
Aaron
68 Roadrunner 383/AT
69 Dart GT Conv. 383/AT
05 Dodge Ram 4x4 Cummins
06 GoManGo R/T Daytona #757
68 Coronet 440
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Re: Need help tuning mild 440
[Re: Prodart440]
#146739
11/10/08 01:59 AM
11/10/08 01:59 AM
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Joined: Aug 2003
Posts: 2,466
Answering the call of the wild
ThermoQuad
top fuel
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top fuel
Joined: Aug 2003
Posts: 2,466
Answering the call of the wild
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whoa nellie.....no matter what you do to the carb ie drill holes etc, the distributor needs a custom curve or this car will not run properly or in simpler language it will be a pig. 18 initial, 32 total, slow advance rate till all in by 2400 rpm. Put the recurved dist back in the car, set the initial at 18 and set the idle at 1000 rpm and adj the mixture screws to the highest vacuum reading. Readjust the idle to 950 rpm and put it in gear and see what happens. When you get to that point please come back and we will help you finish. 
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Re: Need help tuning mild 440
[Re: Prodart440]
#146740
11/10/08 09:34 AM
11/10/08 09:34 AM
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Joined: Jan 2003
Posts: 24,562
Brookeville, Md
Mr.Yuck
Not enough dumb comments...yet
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Not enough dumb comments...yet
Joined: Jan 2003
Posts: 24,562
Brookeville, Md
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Quote:
So I was playing with the timing the other night, and I forgot to hook up the vacuum advance. The car seemed to run the same, but without the problems of it pinging when I get on it. I set the initial timing at about 12*. I still don't know what and when the total timing is and when it is in.
With that cam you don't even need a vacuum advance. I wouldn't worry about initial and have 38* full at 2600rpm. As mentioned before no matter what you do, if you don't have good compression, 3000 stall and 3.91's or better the car is going to be slow out of the hole.
Change the PV, drill the throttle plates and re-curve the distrib, set your timing and let us know how it goes.
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