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February 2026
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03-08-2006, 05:35 AM
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CC Member
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Join Date: Dec 2001
Location: Louisville,
KY
Cobra Make, Engine: I'm Cobra-less!
Posts: 9,417
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Not Ranked
I'd like to stay with a Dominator carb I think since if I go with a regular base carb, I'd have to use a carb adapter....which would add at least .400" of height to the intake manifold.
So what would happen if I put say a 1050 on the engine. Would I be able to get the A/F ratio right? Would it just have crappy throttle response on the bottom end?
There's a Dominator 750, but I'm kinda scared that it would be too small.....I've been reading a lot of stories that say the carb manufacturers over inflate their cfm ratings.....i.e. a Holley HP950 only truly flows around 800 cfm....
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03-08-2006, 05:55 AM
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Stolen Avitar
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Join Date: Oct 2004
Location: Brunswick,
GA
Cobra Make, Engine: BDR 1311 428PI
Posts: 3,044
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Not Ranked
My "Boss 372" (stroked clevor) is running a Demon RS set up for 1050 cfm at the moment and is in my 3200# Boss 302 body and runs fine. Now I haven't had it on a dyno but when that thing opens up there is no delay in throttle response. If dumped in 1st or 2nd it just lights the tires. These carbs are set up to have their flow rates changed for varying applications. I probably will try other sleeve sets for it to try it at other CFM ratings but for now it's fine. BTW, I picked mine up on ebay for less than $500. I second the advise to make a call to: http://www.4secondsflat.com/ I bought their tuner manual and there is a huge amount of info there.
Steve |
03-08-2006, 06:25 AM
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CC Member
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Join Date: Dec 2001
Location: Louisville,
KY
Cobra Make, Engine: I'm Cobra-less!
Posts: 9,417
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Not Ranked
I have their manual too....I bought it when I had my small block with a 750 Mighty Demon.
I emailed Don Gould not too long ago with my combination.....he again recommended a Mighty Demon 750.
750 just sounds so small though...considering the 327 Chevy engines came out with 750's on them.....
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03-08-2006, 02:35 PM
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CC Member
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Join Date: Dec 2001
Location: Louisville,
KY
Cobra Make, Engine: I'm Cobra-less!
Posts: 9,417
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Not Ranked
What size is it?
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03-08-2006, 04:48 PM
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CC Member
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Join Date: Sep 2003
Cobra Make, Engine:
Posts: 39
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Not Ranked
Quote:
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Originally Posted by blykins
What size is it?
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True flow is a bit over 800 cfm.
Patrick is known for his vast knowledge/experience on emulsion packages and fuel shear. He's also one of he few "tuner" shops to use a wet flow bench for testing/setup.
__________________
'89 LX 408...SCAT, Probe, AFR 205, Vic Jr, Pro-Systems, Rawls sft cam, UPR K & arms w/coil overs.....more to come! 
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03-08-2006, 04:08 PM
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CC Member
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Join Date: Aug 2003
Location: Southeast,
CT
Cobra Make, Engine: ERA #375 427 S/C - 428FE - Toploader - 1968 AMX 390 Go Pack 4 Speed - My Daily Driver is a 2004 Crossfire
Posts: 872
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Not Ranked
Blykins:
My 428 had an 850 DP Holley on it until last year when I installed a Don Gould (4 Seconds Flat) prepped and flowed Mighty Demon 750 DP. The old Holley (14 years) used to bog on my like crazy if I trommped the go pedal whereas the new Demon is just totally instantaneously responsive. Additionally, the car performs better all around and my gas mileage has gone up by 10 percent which is about one mile per gallon more. (hey every litttle bit helps... ;-))
That said please do yourself a favor and call Don up and before hand fill out his information document about your engine. He was very helpful and also he provided some cell phone in the garage coverage for me when I was doing the final setup...
The Mighty Demon has two idle speed screws.... I did not know that (hee hee)
Unabashed.... Art
__________________
Art in CT
See My Website at http://www.lithicsnet.com
A car can massage organs which no masseur can reach. It is the one remedy for the disorders of the great sympathetic nervous system. Jean Cocteau 1889-1963, French Author, Filmmaker
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03-08-2006, 04:54 PM
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CC Member
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Join Date: Feb 2006
Cobra Make, Engine:
Posts: 283
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Not Ranked
There may be two things getting confused.
One common thread...people with tuner carbs built for their configuration say they get good throttle response, good mileage, and good power.
People with off the self carbs report good response if the carb is small. Good power if it is big.
And the moral of this story is...
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03-08-2006, 04:58 PM
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CC Member
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Join Date: Dec 2001
Location: Louisville,
KY
Cobra Make, Engine: I'm Cobra-less!
Posts: 9,417
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Not Ranked
Hey Art....when you say flowed, did he let you know what it would flow on a bench?
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