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Thread: octane thread

  1. #1
    mbaseball3's Avatar
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    octane thread

    what's the highest octane a basically stock rxp can handle?


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    Mod less, ride more! troyheb's Avatar
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    what exactly do you mean handle? I would be more concerned with how low can it handle.

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    PieManMighty's Avatar
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    +1 .... i never put anything lower then 93 in my RXP

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    Faster Than a Snail on a Log mongorunner's Avatar
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    Quote Originally Posted by mbaseball3 View Post
    what's the highest octane a basically stock rxp can handle?


    FYI

    higher octane does not mean more HP

  5. #5
    No reason to run higher than 93 or 94oct for the majority of SCIC 4tecs out there. Just keep it at or above 91oct.

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    mbaseball3's Avatar
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    can anyone explain why? thought any type of fuel additive would increase horse power. hotter burn right?

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    Whats that whistling noise? jtskier11's Avatar
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    Quote Originally Posted by mbaseball3 View Post
    can anyone explain why? thought any type of fuel additive would increase horse power. hotter burn right?
    Octane doesnt mean hotter burn. Higher octane means fuels resistane to burning. Higher octane will not create more power!!!! Octane booster unless used in MASS quantities will not do much of anything.

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    Mod less, ride more! troyheb's Avatar
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    Basically higher octane means more resistant to pre-detonaion. For example high compression = high cylinder temp = fuel igniting before spark = less power. So you dont get more power with higher octane, just all the power you engine is able to make. hth

  9. #9
    TEX-X's Avatar
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    my general rule of thumb....11:1 compression ratio is about when you want to start running 100 octane low lead...or a higher octane.... anything up to it will run premium just fine.. octane is the fuels ability to withstand pre-detonation (like someone said) yes if you're running a motor of 11.5:1 CR it will get more HP with a higher octane fuel for the simple reason that the fuel air mixture is not prematurely lighting off.. but with stock 4 tecs....premium is fine... on the compression ratio topic...has anyone ever thought of modding a 4 tec to run methanol?

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