Racing fuel in a Z

Originally Posted by kannibul It won't advance timing due to higher octane - in fact, the car won't even "know" that it's running on higher octane, it simply knows that

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Racing fuel in a Z

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12-02-2009, 03:38 AM

#15 (permalink)

imag

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Quote:

Originally Posted by kannibul

It won't advance timing due to higher octane - in fact, the car won't even "know" that it's running on higher octane, it simply knows that the knock sensors aren't tripping.

I understand the benefits of oxygenation as well as energy density. However, it is not uncommon for modern high performance moderate-high compression motors (like ours) to have small amounts of detonation with 91 octane gas, especially when the motor is hot and/or the air is hot and dry. Likewise, they can adjust the timing to can take advantage of moderately higher octane fuel (94-96) when conditions warrant - like being on a dyno or on a race track.

Edit - sorry - missed the second page. RCZ is exactly right.

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Last edited by imag; 12-02-2009 at 03:40 AM.

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