Any logic to running anything more than 93 Octane?
03-09-2004, 01:34 PM
#1
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Any logic to running anything more than 93 Octane?
Was at Thunderhill this past weekend for the SCCA driving school (yes, I passed. In a Honeybee of all cars), and I wondered if the allroad could handle 100 Octane. I know 91 is the minimum octane to use, but does the allroad have enough compression to run higher octane gas? Will it just run rich if I get a few gallons of 100 octane? I know higher octane gas works a little better at higher elevations, but I am primarily at sea level.
03-09-2004, 02:22 PM
#4
Correct, thats the whole point of higher octane
With higher octane you can run higher compression without the risk of premature detonation. Octane reduces the fuel mixture's ability to detonate and run like a diesel.
In theory, higher octane lets you advance the spark further, and this potentially buys you a few HP.
In theory, higher octane lets you advance the spark further, and this potentially buys you a few HP.
03-09-2004, 02:28 PM
#5
But octane rating beyond the compression/advance parameters...
would just have incomplete burning, I would think. Thus, a loss of efficiency and probably power.
Anybody care to counter that idea?
Anybody care to counter that idea?
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03-09-2004, 04:45 PM
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The higher the octane the slower it burns.
to hi and you will start getting a miss at higher RPM because there is not enough time for all the fuel to burn. Plus at $4+ per gal.
03-09-2004, 09:46 PM
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Re: But octane rating beyond the compression/advance parameters...
I drive between 5000' and 10,000 feet rountinely-anyone else ever hear of being able to drop to 87 octane? My wallet would appreciate it.