Dyno tested fuel?
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Dyno tested fuel?

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    Senior Member Widetrack's Avatar
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    Default Dyno tested fuel?

    Has anyone dynoed a mill using different fuel such as 93 octane compared to 111-112 octane? Lets say a 468 pump gas motor 10.1 comp. What were the differences in HP on race fuel?

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    Senior Member H20MOFO's Avatar
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    It's my understanding that when you use a fuel with a higher octaine than you need , you make no more power, and more than likely less, because the higher octaine burns slower.
    Another Hot Boat refugee

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    Senior Member Widetrack's Avatar
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    I have been told that before. But a 10.1 to a 10.5 -1 is pushing the envelope on pump gas and I was wondering if race fuel will make the same motor tested {dynoed} had more HP?

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    Distinguished Member David 519's Avatar
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    Unless you use a fuel that's oxygen bearing, a better fuel itself won't make more power. What a better fuel does is allow you to use higher compression ratios, more timing, etc... which in turn makes more power. If your engine is not detonating on the fuel your using, there's no more power to be had by using higher octane levels.

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    Senior Member Widetrack's Avatar
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    That is what I wanted to know! Thanks

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    Senior Member Brendellajet's Avatar
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    Quote Originally Posted by Widetrack View Post
    I have been told that before. But a 10.1 to a 10.5 -1 is pushing the envelope on pump gas and I was wondering if race fuel will make the same motor tested {dynoed} had more HP?
    Lots of people running considerably more than that in boating applications with success on pump gas.

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