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Re: Holley 4500 Carb
[Re: Mopar Racer]
#896220
01/04/11 10:08 PM
01/04/11 10:08 PM
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Joined: Mar 2010
Posts: 341
Highland beach Fl
poisondart2
enthusiast
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enthusiast
Joined: Mar 2010
Posts: 341
Highland beach Fl
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Quote:
I had a question for some of you fellow racers.I am a sportsman footbrake racer.I am presently running a Pro Systems 4150 carb.Sheet on carb shows to flow 944cfm.I have a 1966 Dodge Coronet with a 512 lowdeck.I was interested in trying a Holley 1050 Dominator.A friend of mine that builds engines recommended the list #8896.Another friend told me #9375.Which would yall recommend?The car weighs 3530lbs. with driver full of fuel.In cool weather the car runs 6.20's eighth mile.Would I see much E.T. gain for the $700.00 plus dollars carb price?Indy 295 cnc EZ's (flow 350In.245ex.)Indy 4150 single plane.650 CompCam solid flat tappet.13.5 to 1.Thanks for any advice.
I would think a bigger carb would help you . I would guess a 10th with a dominator but then again I would consider a larger carb than the 1050. Call patrick at Prosystems and ask his advise.
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Re: Holley 4500 Carb
[Re: Mopar Racer]
#896221
01/04/11 10:08 PM
01/04/11 10:08 PM
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Joined: Mar 2010
Posts: 341
Highland beach Fl
poisondart2
enthusiast
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enthusiast
Joined: Mar 2010
Posts: 341
Highland beach Fl
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Quote:
I had a question for some of you fellow racers.I am a sportsman footbrake racer.I am presently running a Pro Systems 4150 carb.Sheet on carb shows to flow 944cfm.I have a 1966 Dodge Coronet with a 512 lowdeck.I was interested in trying a Holley 1050 Dominator.A friend of mine that builds engines recommended the list #8896.Another friend told me #9375.Which would yall recommend?The car weighs 3530lbs. with driver full of fuel.In cool weather the car runs 6.20's eighth mile.Would I see much E.T. gain for the $700.00 plus dollars carb price?Indy 295 cnc EZ's (flow 350In.245ex.)Indy 4150 single plane.650 CompCam solid flat tappet.13.5 to 1.Thanks for any advice.
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Re: Holley 4500 Carb
[Re: Mopar Racer]
#896222
01/04/11 10:22 PM
01/04/11 10:22 PM
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Joined: Jan 2003
Posts: 12,162
Benton, IL.
DaveRS23
Special needs idiot
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Special needs idiot
Joined: Jan 2003
Posts: 12,162
Benton, IL.
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I'ld call Holley tech and ask them. I run the 9375, but I converted it from a 3 circuit to a 2 circuit. I believe both carbs you listed are 3 circuit carbs. I don't think the 3 circuit is best for foot brakers. I know that the 9375 is an annular booster carb, and I think that the 8896 is not. You should be able to borrow a Dominator and adapter from someone just to try. For a foot braker, I would think that a 2 circuit carb with annular boosters would work best, but I am not a carb guru. My car weighs 3450 and I have a 499" wedge that runs 6.9s in the 1/8. When I went from the 950 to the Dominator I gained about 1 1/2 mph, but basically ETed the same because I believe that I have maxed out my stock un-reinforced body. 
Master, again and still
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Re: Holley 4500 Carb
[Re: DaveRS23]
#896224
01/04/11 11:04 PM
01/04/11 11:04 PM
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Joined: Oct 2009
Posts: 1,288
Oregon
sg66mopar
pro stock
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pro stock
Joined: Oct 2009
Posts: 1,288
Oregon
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I'm assuming from the 6.20s you don't drive this thing on the street. That being said, I think the 8896 is you best choice. It's designed for your type application. The 9375 was designed to be used in a dual 4 application. I don't think you'll see a lot of ET difference unless your current carb isn't working well but that 8896 should make a major improvement in how clean and crisp the motor runs. When I went to the 8896 from an old version 850 my car didn't go a lot faster but it sure worked better. Throttle response and all that. Then I had the new carb worked over by Gary Stinnett and REALLY saw some improvement. Myself and a lot of my friends run the 8896 in our Super Gas and Super Comp cars with anywhere from 572" on up to 632" motors running mid to low 8s. 
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Re: Holley 4500 Carb
[Re: Mopar Racer]
#896226
01/05/11 12:35 AM
01/05/11 12:35 AM
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Joined: Aug 2003
Posts: 43,228
Bend,OR USA
Cab_Burge
I Win
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I Win
Joined: Aug 2003
Posts: 43,228
Bend,OR USA
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There are three versions of both carbs, pre HP, post HP and Ultra. I have had and used both carbs and both types of the early ones, none of the Ultra. I like the early 9375 non HP for single four foot brake racing They are a two circuit carb. with no power valves originally that works very well on a single four intake foot braking I have loaned my 9375HP out before adding jet extensions to a local racer, he said it work real well out of the box, but it did bog on the hit, I'm sure due to no jet extensions in the rear   I have track tested the non HP 8896 with stock jetting compared to a non HP 9375 with stock jetting and the 9375 was faster by around .04 and .3 MPH I have also dyno both carbs, 9375 with stock jetting versus 9375HP with stock jetting and the HP made a little more power, not much, 5 to 8 HP and similar torque in parts of the dyno tests, not all the way from (on every 100 RPM measured) 4000 RPM to 7000 RPM BTW, the stock 9375 are a two circuit carb. with non annular boosters and no power valve, the 9375HP are a three circuit carb. with power valves front and back with standard boosters.
Last edited by Cab_Burge; 01/05/11 02:24 PM.
Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
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Re: Holley 4500 Carb
[Re: sg66mopar]
#896234
01/05/11 01:46 PM
01/05/11 01:46 PM
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Joined: Oct 2003
Posts: 339
Wisconsin
BIGS
enthusiast
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enthusiast
Joined: Oct 2003
Posts: 339
Wisconsin
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Quote:
Don't mean to hijack here but I'm sure the OP might want to know also. What's the benefit of converting an 8896 from 3 to 2 circuit? 
The main benifit to the 2 circuit carb is they tend to run much cleaner at part throttle.....especially good for street driven cars that cruise around allot between 2500-3500RPM....we get allot of calls every week from guys that have Dominators that run rich at idle and rich at part throttle.....and for most applications the 2 circuit Dom is a great choice and will run just as fast as a 3 circuit....
We build allot of 2 circuit Dom's for street/strip cars and boats that spend allot of time at idle and cruise....no matter how much tuning we do on a 3 circuit it just isnt as nice as a 2 circuit Dom when its done correctly....Jesse
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Re: Holley 4500 Carb
[Re: Mopar Racer]
#896235
01/05/11 01:49 PM
01/05/11 01:49 PM
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Joined: Oct 2003
Posts: 339
Wisconsin
BIGS
enthusiast
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enthusiast
Joined: Oct 2003
Posts: 339
Wisconsin
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Quote:
I had a question for some of you fellow racers.I am a sportsman footbrake racer.I am presently running a Pro Systems 4150 carb.Sheet on carb shows to flow 944cfm.I have a 1966 Dodge Coronet with a 512 lowdeck.I was interested in trying a Holley 1050 Dominator.A friend of mine that builds engines recommended the list #8896.Another friend told me #9375.Which would yall recommend?The car weighs 3530lbs. with driver full of fuel.In cool weather the car runs 6.20's eighth mile.Would I see much E.T. gain for the $700.00 plus dollars carb price?Indy 295 cnc EZ's (flow 350In.245ex.)Indy 4150 single plane.650 CompCam solid flat tappet.13.5 to 1.Thanks for any advice.
Booney.....we would look for at least 2 tenths pickup in the 1/4 on your 512....there's no doubt it will run stronger up top but the trick is to not loose any down low....Jesse
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Re: Holley 4500 Carb
[Re: BIGS]
#896237
01/05/11 06:39 PM
01/05/11 06:39 PM
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Joined: Dec 2008
Posts: 1,200
UK
602heavy
pro stock
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pro stock
Joined: Dec 2008
Posts: 1,200
UK
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Quote:
The main benifit to the 2 circuit carb is they tend to run much cleaner at part throttle.....especially good for street driven cars that cruise around allot between 2500-3500RPM....we get allot of calls every week from guys that have Dominators that run rich at idle and rich at part throttle.....and for most applications the 2 circuit Dom is a great choice and will run just as fast as a 3 circuit....
We build allot of 2 circuit Dom's for street/strip cars and boats that spend allot of time at idle and cruise....no matter how much tuning we do on a 3 circuit it just isnt as nice as a 2 circuit Dom when its done correctly....Jesse
Great post & no BS.
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