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Re: Pro Systems Carbs.
[Re: 572charger]
#1431237
05/08/13 10:59 AM
05/08/13 10:59 AM
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Joined: Jan 2003
Posts: 13,374
Marion, South Carolina [><]
an8sec70cuda
I Live Here
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I Live Here
Joined: Jan 2003
Posts: 13,374
Marion, South Carolina [><]
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Quote:
pro systems on my hemi ,( dominator) picked up 2 tenths and 2 mph over my reworked 9375 dom ?? they work out of the box 
Have one on my hemi too. It was good to go out the box. I tried different things w/ it, but ended up going right back where it was originally. Patrick also did my old 9375 dominator that's on my 440 and it runs great too.
CHIP
'70 hemicuda, 575" Hemi, 727, Dana 60
'69 road runner, 440-6, 18 spline 4 speed, Dana 60
'71 Demon, 340, low gear 904, 8.75
'73 Chrysler New Yorker, 440, 727, 8.75
'90 Chevy 454SS Silverado, 476" BBC, TH400, 14 bolt
'06 GMC 2500HD LBZ Duramax
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Re: Pro Systems Carbs.
[Re: gtsdon]
#1431238
05/08/13 11:07 AM
05/08/13 11:07 AM
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Joined: Jun 2003
Posts: 52,972
Romeo MI
MR_P_BODY
Master
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Master
Joined: Jun 2003
Posts: 52,972
Romeo MI
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My 416 is very similar to yours... mine on the dyno made 550 hp and I used a 850 dp Holley... your conv is holding you back on the 60' but thats not the problem on the top end(mph)... mine is done at 6600 rpm right now due to valve springs being to light for it... and being that your MPH is down I would look at the springs first thing.... also on the dyno it wanted 39* of timing so you might look at that also... granted your heads are different than mine(I run W-5s) but if your are ported they should be in the same ball park... mine was dynoed with 93 octane... if you are running a race type of fuel thats probably to much octane for your timing and giving you a slow burn and killing off HP 
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Re: Pro Systems Carbs.
[Re: gtsdon]
#1431240
05/08/13 01:10 PM
05/08/13 01:10 PM
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Joined: Jun 2003
Posts: 52,972
Romeo MI
MR_P_BODY
Master
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Master
Joined: Jun 2003
Posts: 52,972
Romeo MI
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Quote:
Thanks Mr P Body, I use pump gas on the street and at the track. Ryan set up the valve springs and selected this camshaft so they should be close. From the responses it appears I’m headed in the right direction. My plan is to change out the Carb and converter then run the car on the dyno for final tuning.
To me when they state that the carb can make 15-30
hp more over the 750 its only because it flows more..
nothing magic about it... but if you didnt need a
larger carb it wouldnt really help... but in your
case and in mine the bigger carb would help but I
didnt want to put a 1050 dom on it because its a
street/strip type of car and more street
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Re: Pro Systems Carbs.
[Re: bdaz smblk]
#1431242
05/09/13 12:43 AM
05/09/13 12:43 AM
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Joined: Dec 2006
Posts: 214
Colo Springs, CO
DconD100
enthusiast
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enthusiast
Joined: Dec 2006
Posts: 214
Colo Springs, CO
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That's a great engine combo. I have some info that may be helpful... When we dynoed my 408 with very similar specs, I was disappointed with the performer rpm. If memory serves it picked up somewhere around 20 hp and 15 ft lbs (observed) across the board with a M1 single plane. Now, we did start the pulls at 3500 rpm,and both were done with a 1 inch Wilson spacer and a 1000cfm 4150 on E85. I don't know what it would have done at lower rpms with a smaller carb, but it peaked with 578hp at 6200, even with the M1...which was the same peak rpm as the performer rpm. Maybe I'm comparing apples to oranges? Keep in mind it was dynoed at 6300 ft, and according to my engine builder it should have liked the performer rpm better.(which is why we started out with it)
Pump Gas Small Blocks Rock!
11.53 @ 116mph E85 408 at 8500 ft da,
3605 pound truck, 3.91s, street driven
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Re: Pro Systems Carbs.
[Re: sshemi]
#1431246
05/10/13 11:59 AM
05/10/13 11:59 AM
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Joined: Dec 2004
Posts: 2,703
Mohnton, Pa
DodgeCharger
master
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master
Joined: Dec 2004
Posts: 2,703
Mohnton, Pa
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Quote:
Hooked up the vac gauge today and it didnt show any vac all the way up to 6000+ rpms
Do you have a vacuum leak? That doesn't sound possible.
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