Re: double pumper or vac.sec
[Re: gch]
#1335230
11/15/12 02:49 AM
11/15/12 02:49 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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We use a 750 DP on my sons Dart with his .030 over 400 and it works great. He uses 3.91's also and even put an 830 DP on but it ran no faster with the 830 so he went back to the 750 DP which works great for him. Just a standard 750 DP we tuned. It has run 11.40's at 117 and its just a mild 400 driver. I like the 750 DP for mild street cars. Ron
Last edited by 383man; 11/15/12 02:50 AM.
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Re: double pumper or vac.sec
[Re: gch]
#1335231
11/15/12 08:22 AM
11/15/12 08:22 AM
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Joined: Feb 2004
Posts: 1,012
indiana
mcmopars
OP
super stock
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OP
super stock
Joined: Feb 2004
Posts: 1,012
indiana
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Quote:
Borrow a known good one and find out.A 750 is the logical response but it may et better with an 800 or 850.
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dont have that option
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Re: double pumper or vac.sec
[Re: mcmopars]
#1335232
11/15/12 08:32 AM
11/15/12 08:32 AM
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Joined: Nov 2003
Posts: 12,494
Western Colorado High Desert
moparmarks
I Live Here
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I Live Here
Joined: Nov 2003
Posts: 12,494
Western Colorado High Desert
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Quote:
ive always heard vac.sec with an auto for the street.
Yes for a mostly stock or mild build. With your cam, T-convertor and gears a DP should work good for you.
72 Satellite Sebring Plus 440, 72 Dart 5.9 4-spd, 68 Valiant, 73 W200, 78 D100 sb, 78 D200, 98 DAKOTA, . Moparmarks Parts & Restorations Desert Mopar Metal Grand Jct. CO 970-261-7039 http://moparmark.com/motormangj@gmail.com
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Re: double pumper or vac.sec
[Re: mcmopars]
#1335236
11/15/12 09:32 PM
11/15/12 09:32 PM
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Joined: Jan 2003
Posts: 8,936
Holly/MI
Dean_Kuzluzski
master
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master
Joined: Jan 2003
Posts: 8,936
Holly/MI
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There used to be an old trick of putting a paperclip or something like that on the diaphragm rod to assure that the secondaries are opening completely..........
Just sayin'...........might as well make sure you're gittin' all she's got now.
R.I.P.- Gary "Coop" Davis 02/09/68-05/13/04
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Re: double pumper or vac.sec
[Re: Dean_Kuzluzski]
#1335237
11/16/12 10:39 AM
11/16/12 10:39 AM
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Joined: Mar 2010
Posts: 1,880
Out in Left Field, NY
bobs66440
top fuel
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top fuel
Joined: Mar 2010
Posts: 1,880
Out in Left Field, NY
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Quote:
There used to be an old trick of putting a paperclip or something like that on the diaphragm rod to assure that the secondaries are opening completely..........
Just sayin'...........might as well make sure you're gittin' all she's got now.
Yes I agree, I did that exact thing to find out the secondaries were hardly opening at all on my '28 hot rod. I had the lightest springs available, so there was nothing I could do about it. The car was just too light for the horsepower (built 468 BB Chevy) to generate enough load.
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Re: double pumper or vac.sec
[Re: bobs66440]
#1335238
11/16/12 06:31 PM
11/16/12 06:31 PM
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Joined: Feb 2004
Posts: 1,012
indiana
mcmopars
OP
super stock
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OP
super stock
Joined: Feb 2004
Posts: 1,012
indiana
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Quote:
Quote:
There used to be an old trick of putting a paperclip or something like that on the diaphragm rod to assure that the secondaries are opening completely..........
Just sayin'...........might as well make sure you're gittin' all she's got now.
Yes I agree, I did that exact thing to find out the secondaries were hardly opening at all on my '28 hot rod. I had the lightest springs available, so there was nothing I could do about it. The car was just too light for the horsepower (built 468 BB Chevy) to generate enough load.
tried that a few years ago and the paper clip moved so secondaries were working
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Re: double pumper or vac.sec
[Re: bobs66440]
#1335239
11/16/12 06:34 PM
11/16/12 06:34 PM
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Joined: Feb 2004
Posts: 1,012
indiana
mcmopars
OP
super stock
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OP
super stock
Joined: Feb 2004
Posts: 1,012
indiana
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Quote:
I would definitely go no more than 750. 650 would probably be good.
anyone run a 750 d.p. on a set-up simular to mine? id just really hate to over carb the thing,no returns on carbs
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Re: double pumper or vac.sec
[Re: GTX MATT]
#1335241
11/16/12 06:39 PM
11/16/12 06:39 PM
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Joined: Feb 2004
Posts: 1,012
indiana
mcmopars
OP
super stock
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OP
super stock
Joined: Feb 2004
Posts: 1,012
indiana
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Quote:
Quote:
Quote:
Quote:
There used to be an old trick of putting a paperclip or something like that on the diaphragm rod to assure that the secondaries are opening completely..........
Just sayin'...........might as well make sure you're gittin' all she's got now.
Yes I agree, I did that exact thing to find out the secondaries were hardly opening at all on my '28 hot rod. I had the lightest springs available, so there was nothing I could do about it. The car was just too light for the horsepower (built 468 BB Chevy) to generate enough load.
tried that a few years ago and the paper clip moved so secondaries were working
The question is are they opening all the way?
how much travel should there be?
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Re: double pumper or vac.sec
[Re: mcmopars]
#1335242
11/16/12 07:26 PM
11/16/12 07:26 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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Quote:
Quote:
I would definitely go no more than 750. 650 would probably be good.
anyone run a 750 d.p. on a set-up simular to mine? id just really hate to over carb the thing,no returns on carbs
I have a 950hp on mine, what do I know... 
Cars with less cam/converter/gear run std 750dp's all the time. I wouldn't put anything smaller on it, although you could.
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