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Re: CARB CHANGE EXPECTATIONS??!!!
[Re: Labratt]
#859296
11/21/10 02:19 PM
11/21/10 02:19 PM
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Joined: Jan 2003
Posts: 12,074
Benton, IL.
DaveRS23
Special needs idiot
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Special needs idiot
Joined: Jan 2003
Posts: 12,074
Benton, IL.
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Well, that would depend. If you can borrow a carb, you absolutely should try more CFM. As for buying carbs to test, not unless you're made of money. My 500" wedge gained just over 1 mph in the 1/8 going from a 950 to a 1050 Dominator. I don't remember exactly what my gain was when I went from an 850 to the 950. But it seems like a mile an hour or so. How big a carb, type of spacer (if any), type of boosters, etc. are best determined through testing. 
Master, again and still
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Re: CARB CHANGE EXPECTATIONS??!!!
[Re: AndyF]
#859301
11/21/10 03:31 PM
11/21/10 03:31 PM
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Joined: Apr 2010
Posts: 1,049
ohio
all spooled up
super stock
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super stock
Joined: Apr 2010
Posts: 1,049
ohio
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Quote:
A 950HP is smaller than an 850 DP. The 1000HP is basically the same carb as a 850 DP. So I'd say that you wouldn't see much difference at all between those carbs unless one of them wasn't set up correctly.
The 950HP is probably the best carb to run on the street but it might slow you down just a tad at the drags. Typically the 950HP will run better than a 850 DP on the street unless you have more than 500 ci.
ANDY can you tell us how the 950 is differed than the 850 it flows less 
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Re: CARB CHANGE EXPECTATIONS??!!!
[Re: all spooled up]
#859303
11/21/10 03:57 PM
11/21/10 03:57 PM
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Joined: Mar 2003
Posts: 9,099
Rogue River, OR
Jeremiah
master
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master
Joined: Mar 2003
Posts: 9,099
Rogue River, OR
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Quote:
Quote:
A 950HP is smaller than an 850 DP. The 1000HP is basically the same carb as a 850 DP. So I'd say that you wouldn't see much difference at all between those carbs unless one of them wasn't set up correctly.
The 950HP is probably the best carb to run on the street but it might slow you down just a tad at the drags. Typically the 950HP will run better than a 850 DP on the street unless you have more than 500 ci.
ANDY can you tell us how the 950 is differed than the 850 it flows less
Quoted from Captain Budget:
"
A Holley "950 HP" is basically a streamlined 750-size (1.38" venturi) main body w/ an 850 (1.75") baseplate. IIRC, that's worth 820-840 cfm from what those who have flow-tested them have said.
A Holley "1000 HP" is a streamlined 850-size (1.56" venturi) main body w/ a 1.75" baseplate. I don't remember what those supposedly flow, but I'm pretty sure it's well below 1000 cfm. "
When I purchased my 1050 QF Annular Booster 4150 they claimed it would flow every bit of 1050 cfm.  I think the QF/Pro-form main body is a different animal from the Holley.
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Re: CARB CHANGE EXPECTATIONS??!!!
[Re: Labratt]
#859304
11/21/10 04:01 PM
11/21/10 04:01 PM
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Joined: Feb 2005
Posts: 4,313
Prospect, PA
BSB67
master
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master
Joined: Feb 2005
Posts: 4,313
Prospect, PA
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My The 950 verses the 850 w/o air horn will mph the same on your single plane intake, but the 950 might pick up the 60 ft, and mid track (shift recovery) performance. Maybe .1 sec. in et. Test it out and let us know.
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Re: CARB CHANGE EXPECTATIONS??!!!
[Re: Labratt]
#859309
11/22/10 01:32 AM
11/22/10 01:32 AM
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Joined: Mar 2003
Posts: 9,099
Rogue River, OR
Jeremiah
master
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master
Joined: Mar 2003
Posts: 9,099
Rogue River, OR
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Quote:
Jeremiah,did you have it flow-tested to see exactly what it flows??? How do you like it? I want more air flow..without hurting streetability,even though I run a 4:56 gear and a 9.5" torque converter! If I can get a couple of mph,and still have low-speed throttle response...I'll be a happy camper!    
I'm sorry to say that we never got that involved this year...or the last three for that matter. I'd love to see what it flows though. As far as street manners it is every bit as good as an 850 HP IMO. It would be cool if you could find one to try locally. I was very worried when I first looked down the throat of the carb. It's like looking through a tube! That said it idles nice and throttle response is good at low speeds. If you can't find one to try locally perhaps we can work something out?
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Re: CARB CHANGE EXPECTATIONS??!!!
[Re: Jeremiah]
#859312
11/22/10 06:05 AM
11/22/10 06:05 AM
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Joined: Mar 2009
Posts: 2,463
Sydney,Australia
tex013
top fuel
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top fuel
Joined: Mar 2009
Posts: 2,463
Sydney,Australia
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i just tried a ultra hp950 against my mighty demon 825 on my package i lost about 3/10's and 3-4 mph.just did not get it done.did chassis dyno a tad over 400rwhp it did seem to want to run richer than the demon go figure good luck Tex ps.just ran a new pb 11.308 on sunday.crap i broke out
New best ET 10.259@129.65 .
New best MPH 130.32
Finally fitted a solid cam,
stepped it up a bit more
3690lbs through the mufflers
New World block 3780lbs 10.278@130.80 . Wowser 10.253@130.24 footbraking from 1500rpm
Power by Tex's Automotive
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Re: CARB CHANGE EXPECTATIONS??!!!
[Re: Labratt]
#859314
11/22/10 01:53 PM
11/22/10 01:53 PM
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Joined: Nov 2003
Posts: 2,131
New Lenox IL
cudadon
top fuel
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top fuel
Joined: Nov 2003
Posts: 2,131
New Lenox IL
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Randy I doubt you would see much if any change. It's confusing but the 850 flows more than a 950. Talk to Dwayne about this. Now if you could borrow/buy a 1050 Dom. you probably would see mph difference. I remember Dwayne saying in just about every combo a WELL tuned Dom. will outperform a 4150! OK you dirty rat you! sorry just had to say it.  Don
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Inquiring minds want to know 
Cab..I really can't test the carbs out at the track until next spring..when my neck has more time to heal from the surgery! If time's an issue,I can send the 850 back this week. If not,I'd like to test it out in the spring! Please let me know! 
The engine seems VERY responsive with the "borrowed" 950HP installed! Still waiting for some 50*+ weather to change the air bleeds(lean out)and take it down the road! I live out in the country..2-lane blacktop road,and can get er' rolling pretty good! 
