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Here's a silly question... I've always been of the belief that octane only does something for you if you're tuned to take advantage of it. Do y'all know if the newer computers take octane into account in the tune or the way the car runs? The reason I ask is since my car's still stock, I've mostly been running 87 in it. I'll bump it up to 93 once it's tuned. Do you think this hurts performance as it currently sits? IOW, would it run better times with 93??
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IIRC, it says something in the manual to the effect that 91 is preferred, but anything under that will run fine, since the pcm will compensate. -
That's my point...if the pcm is compensating, is that robbing power? Knock sensors or something? Timing retard? Just curious if it hurt my times... mine went 84.7 mph in the 1/8th bone stock...just curious if the octane hurt my times...Comment
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If it detects knock, it pulls timing.Originally posted by Doug Hatton View Post
More Run 93 octane and the car will give you more timing.Comment
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The computer will only advance the timing so far.2004 Suzuki DL650
1996 Hy-Tek Hurricane 103Comment
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With my stock tune, I ran 87. You are giving up power, due to the PCM pulling timing. How much would depend on many.....many factors. When u get ready to tune it, make sure it has had 93 in it for a couple of tanks.
To answer your question, yes an 11:1 motor will benefit from 93.Comment
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Well there ya go... that explains why my car was slow! haha!Comment
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I only run 93 in my 5.0
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liquid goldOriginally posted by Buzzo
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