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Thread: Something I read, Is it true?

  1. #1

    Something I read, Is it true?

    I was reading a magazine, a few months ago, in which they have a performace Q & A section and I came across something that I wasn't too sure about. A reader wrote in looking for advice on picking a camshaft and gave some specs on his motor. Here they are:

    388ci small block chevy with a 3.75" stroke, 6" H-beam rods,and forged 10:1 Keith Black pistons, topped off with heads wtih 200 cc runners and 0.570" max lift, a shaft rocker system with 1.6:1 intake and 1.5:1 exhaust rockers and a Edelbrock RPM Air Gap intake.

    The editor replied with suggesting a Crane Powermax cam (F-280-2), duration: 252/260 degrees at 0.050" lift, 0.536/0.554 inch max lift. He also suggested to switch to a single plane intake. Now here is the part that I am not sure I believe. He said, "Your 388 should easily make 580-plus horsepower..."

    Now I don't know much but from all the stuff I have seen 580 hp seem a bit high. Please let me know what you guys think.

  2. #2
    Senior Member RACING JUNKIE
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    Sounds awfully overly optimistic considering the cam, heads, and compression.

    Maybe a typo? Could he have meant 480 HP?

    Even 480 HP seems a bit high to me...
    -WJ Birmingham

    OneBadGMC.com

  3. #3
    Senior Member DYNO TECH
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    I think somewhere around the 500 mark is realistic with that combo. 580 might be stretching it a bit.
    'A government big enough to give you everything you want, is big enough to take away everything you have.'

    Thomas Jefferson


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  4. #4
    Senior Member EXPERT BUILDER
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    atwood,Ky
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    500 would be tops with that combo, i had a 388 with a 670 roller alot big & better head,intake,13.5to1 on allky and made about 650hp so ya i would say typo.

  5. #5
    Senior Member RACING JUNKIE
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    I agree with you guys, I've got a 406, about 13-1 on alchy, single pattern flat tappet cam .525 lift, 250 dur. at .050 lift. I doubt that its making 450 hp. at the flywheel. And yeah, I know that aint enough cam.


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