Quote:
Originally Posted by blackoutVIII
You know what sucks even more 91 piss water and elevation!!! I felt the difference coming from Tx to AZ. I also felt the difference in my EVO VIII. Going from Killeen, TX to AZ altitude and 91 piss gas, there was a 20% drop in WHP in my EVO. I could only imagine what the loss is on a NA engine as our LS3/99s.
Anyone have a dyno difference of at sea level and 4k plus?
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Why would that suck? The less air density, the less octane you need. Octane is a detonation retarder, so running very high octane in very high altitude just will slow combustion. You wouldn't run 100 octane in a Civic, right? Octane is something that you want as little of as you need. High octane fuels are only used when people greatly advance timing to limit detonation. Not advancing timing and just adding octane, if anything, will slow you down. It certainly won't make you faster.