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Old 07-25-2006, 11:41 PM
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383 Stroker .060 over Questions

I just built a 383 Stroker motor bored .060 over with a Comp Cams 280H cam with .480 lift, im going to be running flowtech headers, weiand x-cellerator intake and a Carter AFB Competition Series Carb off of a 454 big block not sure of cfm, the motor it self has 190-195psi compression per cylinder what do you guys think of this setup?

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Old 07-25-2006, 11:50 PM
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The carb model number should be stamped on the base of the carb. Front, lower left corner I think? You can post that and somebody could find it for you, or you could try looking that number up on the Summit web site and find out that way.

What cylinder heads did you go with?

I had a Comp 280H in a 350 several years ago, I really liked the way it idled. Worked great in my 3150 lb '78 Malibu. Too bad I only had the stock 2.73 gears.
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Old 07-26-2006, 05:27 AM
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engine

What heads???
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Old 07-26-2006, 09:16 AM
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I would say that's a ton of cranking pressure! Do you plan to run an octane booster or race gas?
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Old 07-26-2006, 11:09 AM
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I'm running a fresh 383 with the 280H cam in my '69 Nova.

Vortec heads, 750 DP Holley, full MSD, posi w/ 3.42s

Burns up slicks on the street
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Old 07-26-2006, 11:59 AM
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I like that 280H cam. But I hate carter carbs (get a holley). I hope you aren't using stock smogger heads. 882's aren't to bad but a set of vortecs or and good set of aftermarket heads will increase power by 40 or 50hp.

You really need a 3.55 gear and a 2500 stall with a 280H.

195psi is at the maximum cylinder pressure with 93 octane and olds style cylinder heads. There is a good chance you will have detonation issues with 91 octane.

You need performance valve springs with that cam and roller rockers or long slot ball and socket rockers.
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Old 07-28-2006, 10:45 PM
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the heads i am using are stock heads off of a 1983 Chevy 350 but the valves have been resized to those of a vortec

i used these heads b/c of their price and availability, along with their larger combustion chambers, i wanted less compression, with a set of double humps pump gas would have been out of the question, right now its running 10.04 :1

in response to 454C10 i hate holley's i plan on buying a 700 Edelbrock performer, but i got this carter for free and so far have had it on 3 diff motors and not one problem with it at all so.....? lol

tell me what you think...once again
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Old 07-28-2006, 11:18 PM
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Good cam choice. I have one in my 406 and am happy with it. Lots of torque and good horse power. Heads and carb choice will be the weak link. I had an Edelbrock 750 and switched to a Holley 750 HP DP and made a huge difference. I even get better fuel economy. No stumble, easy starting, throttle response like you wouldn't believe. Yours should be a stong runner.

Steve
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Old 07-29-2006, 07:29 PM
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One thing.

If it is .06 over it won't be a 383.
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