high grade fuel w/ Intense PCM for L36 - Page 2 - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


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Old 01-21-2008, 06:46 PM   #11
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I believe Intense'* timing tables stay stock unless they're specifically selected to be increased.
Unless you're selecting that option, I'd stick with 87. I've also heard that N/A cars don't benefit as much as the */C'd cars when timing is bumped. I had an Intense PCM for my '97 SLE with increased timing and 93 octane, and I can't say I noticed a huge difference to be honest.
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Old 01-23-2008, 04:41 PM   #12
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Quote:
Originally Posted by dillcc
I believe Intense'* timing tables stay stock unless they're specifically selected to be increased.
Unless you're selecting that option, I'd stick with 87. I've also heard that N/A cars don't benefit as much as the */C'd cars when timing is bumped. I had an Intense PCM for my '97 SLE with increased timing and 93 octane, and I can't say I noticed a huge difference to be honest.
I bet that cam rocks though

Personally, Id use the lowest octane you can while seeing 0 knock. This includes boosted cars. Higher octane fuel is actually harder to burn (hence the knock resistence) and makes less power than lower octane fuel. Most people push the limits of mods with extra boost or timing and thus require higher octane to run them knock free.

If your concerned with KR I'd scan the car.
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Old 01-23-2008, 06:56 PM   #13
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Andrew, 87 and 89 are only the same in the Mankato area (that i'm aware of)

Like todd said, there'* less potential energy in higher octane fuels, but a certain level of octane is req'd per mods. Makes sense power wise, and financially to use the lowest octane you can get away with.
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