Octane and Compression ???
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Octane and Compression ??? Ok, so people have sat back and asked what octane to run multiple times. I know that running higher is better, I don't run under 91 on ANY vehicle I own. Here's my question. How does octane directly relate under compression? How does compression requier a higher octane gas? And why does a lower octane cause possible pinging/detonation under a higher load/higher temps?? TIA.
Travis
Travis
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From: Cerritos, CA
Originally Posted by cyphur_traq
I know that running higher is better, I don't run under 91 on ANY vehicle I own.
Octane ratings measure a gasoline's ability to resist engine knock, a rattling or pinging sound that results from premature ignition of the compressed fuel-air mixture in one or more cylinders. Running higher octane does not buy you added performance unless you are getting knocking/detonation.
Originally Posted by cyphur_traq
Here's my question. How does octane directly relate under compression? How does compression requier a higher octane gas? And why does a lower octane cause possible pinging/detonation under a higher load/higher temps?? TIA.
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Miner, thanks that cleared things up for me. I appreciate it. And yea.....the reason I only run the higher octane on ls1's due to the fact they were designed for it(or just prefer it, I can't tell). I'm also in texas, so since it rarely gets cooler out except for maybe four or five months out of the year, I just stick with 91 in my Durango anyhow. It seems to like it just fine. LOL.
