Quote:
Originally Posted by GrnMchin
Who said we where talking about a stock motor. Yes Unless other wise stated for example Corvette the lowest grade will work due to the fact the factor has set it up for this ie Timing & Compression. If you where to buy a programmer that advances your timing (most due) and run 85 then you are playing with fire.
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Read post number 4. The OP was talking about stock motors, as were half the people who replied.
Quote:
Originally Posted by swifttal
thank you - excellent link!
Seems it can make quite the difference afterall
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Yes, it makes a difference in cars that are rated for higher octane. What's your point? GM tunes the LS3 for 91 and lets the knock retard pull timing for idiots who put 89 or 87 in the car. Obviously they'll dyno lower. STILL doesn't mean it's going to run better on 100.