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#1
08-20-2007, 02:06 PM
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carb pick
Getting started on putting a new motor in my transam, and not sure what size or type of carb to use. Looking for suggestions on either.
pontiac 455 bored 30 over forged piston 6x heads with 60 thousands removed to make 9.1-1 comp comp cam 268/dual springs aluminum dual plane intake 4 speed Thanks for any help |
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#2
08-20-2007, 05:19 PM
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You got mail!
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#3
08-20-2007, 07:19 PM
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Didn't mean to offend anybody posting this motor combo in race, but I have a friendly bet for grudge night at the drag against a fairly stock 1970 455 skylark gs when it's up and running, but yes this is a basic street engine. Can't afford everything all at once. Should be a close match. It's taking a lot just to go from 403 olds auto, to 455 pontiac 4speed. Hoping to be in the high 13's . But thanks anyway I'll repost on street.
ps thanks jeff for recomendation and shaker455 can't read mail til I get back to work THANK YOU |
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#4
08-20-2007, 11:43 PM
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Quote:
My suggestion would be for a prepped Q-Jet as well.
__________________
Just a blind squirrel looking for a nut. |
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#5
08-20-2007, 08:28 PM
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I live down the street from you...give me a shout
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#6
08-21-2007, 05:19 AM
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If you still have the 1979 Pontiac carburetor, I'd use it. It will require minor modifications for the new engine, but there isn't anything else out there that will work better, street or at the track.
I use a 1977 Pontiac carburetor on my own 455, it has been dyno, and track tested against quite a few Holley and Demon "race" carburetors, and has outpowered or outran them every time.....Cliff
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If you can read this, thank a teacher. If you can read this in English, thank a Veteran! https://cliffshighperformance.com/ 73 Ventura, SOLD 455, 3740lbs, 11.30's at 120mph, 1977 Pontiac Q-jet, HO intake, HEI, 10" converter, 3.42 gears, DOT's, 7.20's at 96mph and still WAY under the roll bar rule. Best ET to date 7.18 at 97MPH (1/8th mile), |
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#7
08-21-2007, 12:11 PM
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whats wrong with the earlier qjets? i have the orig from my 71 455 thinking it was "good" but i guess not? what would be needed for the early ones and why are they inferior? is it just the cfm? also 79transam79 if jeff is that close to you it is a no brainer to use him plus his work is top notch. i sure wish he was the close to me it would have made this summer alot easier.
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71 grand prix SJ 4280# 462 new for 2008 - 8.7:1 , 98cc 6Xs 246/209, 342 12bolt , BW S475 turbo JGS 50mm WG 56mm BOV. 600hp the easy way! |
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#8
08-21-2007, 01:24 PM
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Quote:
There's nothing wrong with the eariler Qjets, I own quite a few...the later ones had more adjustability and have features like APT and a slightly larger primary (800 CFM) for example. |
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#9
08-20-2007, 03:18 PM
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A good custom built 76 up Q-jet would be my recommendation.
HTH
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North Dakotas fastest REAL GTO 10.10 @ 131 MPH in the 1/4 Hoping to get it back together some year. www.jandjrepairandrestoration |
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