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Re: CARB CHANGE EXPECTATIONS??!!!
[Re: Labratt]
#859319
11/22/10 06:46 PM
11/22/10 06:46 PM
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Joined: Feb 2005
Posts: 5,221
Branson, Mo.
joedust451
super gas
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super gas
Joined: Feb 2005
Posts: 5,221
Branson, Mo.
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Quote:
I want more air flow..without hurting streetability, If I can get a couple of mph,and still have low-speed throttle response...I'll be a happy camper!    
Then get a TR & 2 carbs , i'm serious, if your looking for flow, i will say this, unless your carb is jacked up & has issues & not tuned right, your not going to see enough gain to justicy the exspence going with another single carb, your 850 flows alot, more then a 950, thats where some get confused, they look at the larger #, but its just a #, all a 950 is is a tricked out 750 with an 850 base, like mentioned earlier, it'll most likely give you better 60ft. times which will help ET, but if your wanting "flow" & MPH get a TR, i'm sure it'll 60ft. & ET better too. Then you'll be a VERY happy camper.
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Re: CARB CHANGE EXPECTATIONS??!!!
[Re: joedust451]
#859321
11/22/10 09:23 PM
11/22/10 09:23 PM
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Joined: Jan 2003
Posts: 12,141
Benton, IL.
DaveRS23
Special needs idiot
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Special needs idiot
Joined: Jan 2003
Posts: 12,141
Benton, IL.
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Why not just get a used Dominator and try it? You KNOW that they flow their rating. It is a shame that the cfm ratings on so many carbs are fiction.
Get a 1/2" adapter and a used Dominator (or better yet, borrow one) and see how it likes it.
Master, again and still
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Re: CARB CHANGE EXPECTATIONS??!!!
[Re: joedust451]
#859322
11/22/10 09:30 PM
11/22/10 09:30 PM
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Joined: Nov 2006
Posts: 1,458
oklahoma
forphorty
pro stock
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pro stock
Joined: Nov 2006
Posts: 1,458
oklahoma
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Quote:
Quote:
I want more air flow..without hurting streetability, If I can get a couple of mph,and still have low-speed throttle response...I'll be a happy camper!
Then get a TR & 2 carbs , i'm serious, if your looking for flow, i will say this, unless your carb is jacked up & has issues & not tuned right, your not going to see enough gain to justicy the exspence going with another single carb, your 850 flows alot, more then a 950, thats where some get confused, they look at the larger #, but its just a #, all a 950 is is a tricked out 750 with an 850 base, like mentioned earlier, it'll most likely give you better 60ft. times which will help ET, but if your wanting "flow" & MPH get a TR, i'm sure it'll 60ft. & ET better too. Then you'll be a VERY happy camper.
 Check out Dwayne Porters numbers http://www.moparts.org/Tech/Archive/bb/8.html
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Re: CARB CHANGE EXPECTATIONS??!!!
[Re: Labratt]
#859323
11/22/10 09:40 PM
11/22/10 09:40 PM
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Joined: Jan 2003
Posts: 14,504
So. Burlington, Vt.
fast68plymouth
I Live Here
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I Live Here
Joined: Jan 2003
Posts: 14,504
So. Burlington, Vt.
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on a stock stroke 440 based combo, especially in a heavy car, if i were to be inclined to use a downleg booster carb, i'd stick with something that had a 1.425-1.450 max venturi diameter.
going from memory here....
Mighty Demon 750 = 1.400
Mighty Demon 825 = 1.425
QFT Q-750 = 1.375
QFT Q-850 = 1.400
QFT Q-950 = 1.450
QFT Q-1050 = 1.590
it can be a challenge to get a large bore, downleg carb to leave hard with a 3.75 stroke motor in a heavy car.
also, sometimes the shift recovery isnt that great either.....although they often make good power on the dyno.
68 Satellite, 383 with stock 906’s, 3550lbs, 11.18@123
Dealer for Comp Cams/Indy Heads
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Re: CARB CHANGE EXPECTATIONS??!!!
[Re: Labratt]
#859324
11/22/10 10:13 PM
11/22/10 10:13 PM
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Joined: Sep 2005
Posts: 2,442
LOWELL IN
QWK_ENUF
top fuel
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top fuel
Joined: Sep 2005
Posts: 2,442
LOWELL IN
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are you runnin the carb in the pic.it looks like an HP holley not a holley with a removed air horn
if so i can send this one for you to test i just need it back by yhe columbus classic
WAXER
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Re: CARB CHANGE EXPECTATIONS??!!!
[Re: Labratt]
#859326
11/22/10 10:37 PM
11/22/10 10:37 PM
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Joined: Sep 2005
Posts: 2,442
LOWELL IN
QWK_ENUF
top fuel
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top fuel
Joined: Sep 2005
Posts: 2,442
LOWELL IN
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holler if you want to try it
WAXER
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Re: CARB CHANGE EXPECTATIONS??!!!
[Re: Labratt]
#859328
11/22/10 11:06 PM
11/22/10 11:06 PM
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Joined: Jan 2003
Posts: 4,852
KENTUCKY
69CHARGERMD
master
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master
Joined: Jan 2003
Posts: 4,852
KENTUCKY
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Found this as i was "researching" the topic,,,,didnt realize it... Quote from the Carb Shop......... Quote:
After all, 950 is more than 850 right? Wrong! In this case, Holley decided to rate their new line of "HP" carbs like their competition does, with inflated CFM figures. They had to. Otherwise no one would buy them because they are more expensive. An HP 950 Holley is a 750 main body with an 850 base. That makes it an 800. You can do the math. The "950," in this case, refers to the CFM potential, not the size of the venturi and throttle blade diameter
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Re: CARB CHANGE EXPECTATIONS??!!!
[Re: QWK_ENUF]
#859330
11/23/10 01:02 AM
11/23/10 01:02 AM
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Joined: Feb 2005
Posts: 5,221
Branson, Mo.
joedust451
super gas
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super gas
Joined: Feb 2005
Posts: 5,221
Branson, Mo.
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Quote:
holler if you want to try it
That looks like & i'm sure it is a "procomp" mainbody with M.Blocks & bowls.
I hope you tried this carb out, i was going to try one of there mainbodies untill i was told to run are far away as possible from a carb builder i know, he said they have the worst casting amaginable, crappy workmenship, he bought one just for s*its & giggles (ya never know right!). you can more or less build a complete carb for 225.00-250.00, whats wrong with this picture  Most if not all procomp stuff is junk.
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Re: CARB CHANGE EXPECTATIONS??!!!
[Re: fast68plymouth]
#859331
11/23/10 01:38 AM
11/23/10 01:38 AM
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Joined: Jan 2003
Posts: 15,439
Val-haul-ass... eventually
BradH
Taking time off to work on my car
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Taking time off to work on my car
Joined: Jan 2003
Posts: 15,439
Val-haul-ass... eventually
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Quote:
on a stock stroke 440 based combo, especially in a heavy car, if i were to be inclined to use a downleg booster carb, i'd stick with something that had a 1.425-1.450 max venturi diameter.
going from memory here....
Mighty Demon 750 = 1.400
Mighty Demon 825 = 1.425
QFT Q-750 = 1.375
QFT Q-850 = 1.400
QFT Q-950 = 1.450
QFT Q-1050 = 1.590
it can be a challenge to get a large bore, downleg carb to leave hard with a 3.75 stroke motor in a heavy car.
also, sometimes the shift recovery isnt that great either.....although they often make good power on the dyno.
Yep, my Gold Claw is set up w/ the 1.425" venturi / 1.75" baseplate. It made 5-8 HP more on the dyno than my old Holley "950 HP" and was quicker & faster on the track by a comparable amount, too.
I also saw a .2 and 2 MPH improvement on the track switching from a "traditional" Holley 850 to my old Holley "950 HP" and heard from some other people who saw similar improvements w/ the same change. Even though there may not be an outright improvement in HP seen on a dyno, the improvement in shift recovery on the track makes up for it.
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Don..I'm checking into purchasing a ProForm/QuickFuel 1050 main body(4150)Sounds like a budget-friendly way to pick up a couple mph next season! 
My only concern is streetability... 
It's all I can do to tune one carb..let alone 2 of them! 
Maybe go with a 850 or 950 main body. 
The modified 850 that I was referring to is a loaner from P-Body! Works well! Just looking for a couple more mph! 
on this! 
