High Compression what's it worth ?
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High Compression what's it worth ?

  1. #1
    Resident Ford Nut Sleeper CP's Avatar
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    Default High Compression what's it worth ?

    I was looking for an article and didn't find what I was looking for but I did find this:

    http://blogs.hotrod.com/6253885/edit...ech/index.html

    And this:

    http://www.popularhotrodding.com/tec...ech/index.html



    When I find what I'm looking for I'll post a link.

    S CP

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    cfm
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    It's something that's hard to do , because if one makes a big jump in compression they can run a lot more cam, thus extend the rpm range, thus use larger carb, intake, cylinder head, exhaust, etc,etc, which can all add up to a whole lot more hp than just the increase in compression (only) can add.

    So, hp added from added compression only can be very deceiving.
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    Quote Originally Posted by gn7 View Post
    Oh like you've never done that...........


    S CP

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    " A Government big enough to give you everything you want is big enough to take away everything you have"
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    Still doing it. It never stops and you never catch it. Its a disease. Change this, uh oh, need to change now. Damn, now I need a different.....



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    Senior Member cyclone's Avatar
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    a seasons ago I freshened my engine, changed the pistons and nothing else and didn't pick up a thing on the dyno with another point of compression. this season i changed the cam and intake and picked up big time.
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    Quote Originally Posted by cyclone View Post
    a seasons ago I freshened my engine, changed the pistons and nothing else and didn't pick up a thing on the dyno with another point of compression. this season i changed the cam and intake and picked up big time.
    Where was your 1 point at? I've always understood there's more difference between 8-9 than there is say 13-14. At some point there seems to be dimenishing returns.
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    Quote Originally Posted by cyclone View Post
    a seasons ago I freshened my engine, changed the pistons and nothing else and didn't pick up a thing on the dyno with another point of compression. this season i changed the cam and intake and picked up big time.

    Oh don't tell me that

    S CP


    P.S. It does have to do with your starting point though.

    "Dark Sarcasm"
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    Senior Member motormonkey's Avatar
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    $8 or more a gallon. This is a no win subject. Way to much to consider.
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    Quote Originally Posted by motormonkey View Post
    $8 or more a gallon. This is a no win subject. Way to much to consider.

    I thought that's what they make Av gas for

    S CP

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    Quote Originally Posted by Sleeper CP View Post
    I thought that's what they make Av gas for

    S CP
    AV gas as we know it won't be around too much longer.
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    Quote Originally Posted by Sleeper CP View Post
    I thought that's what they make Av gas for

    S CP

    A fuel designed for engines the turn 2750 rpm's, how can that be optimal?
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    Quote Originally Posted by sleekcrafter View Post
    A fuel designed for engines the turn 2750 rpm's, how can that be optimal?
    You ever run it on a dyno in back to back tests at 6,800 rpms in a 10.8:1 compression engine vs race gas like I have

    ( I think it was Trick 104 )

    After you do we'll compare results.


    S CP
    Last edited by Sleeper CP; 07-25-2010 at 03:50 PM.

    "Dark Sarcasm"
    Going fast is only half the fun ... what you make go
    fast is the other half.
    " A Government big enough to give you everything you want is big enough to take away everything you have"
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  16. #14
    Senior Member motormonkey's Avatar
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    S CP, Interesting comparison, what did you find with AV gas to 104 on a 10to1 motor? Ive had great luck with ERC on a 15to1.
    So how long untill this thread goes sideways? I think some guys have the day off.
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