What Octane for an 85 RX 7?
04-18-11, 11:20 PM
#2
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Unless she's turbo charged, feed her the lowest octane you can find. Rotaries need a fast burning fuel, not a slow one, so the lower the better. 
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04-19-11, 10:34 AM
#7
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if you want to learn about gasoline look here. https://www.rx7club.com/rotary-car-performance-77/great-article-946838/
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04-19-11, 10:52 AM
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04-19-11, 12:19 PM
#10
I'll post it on here tonight. I'm pretty sure it was referring to Periph and Track only use. You run higher octane because of the fuel vapors.
I have a 87' and a 98' catalog.
But you're probably right.
Good quality unleaded fuel is best for spark plug life. In racing, it is desirable to use moderately high octane fuel (95 to 105 octane) although even 90 octane may suffice. More important is the "vapor pressure" of the fuel, especially in warm weather and at high altitudes.
The higher the vapor pressure, the easier the fuel boils. It is possible, indeed common, for fuel to boil in a carburetor float bowl. When it does, the mixture is leaned out and performance suffers.
Taken from the Racing Beat Website.
I have a 87' and a 98' catalog.
But you're probably right.
Good quality unleaded fuel is best for spark plug life. In racing, it is desirable to use moderately high octane fuel (95 to 105 octane) although even 90 octane may suffice. More important is the "vapor pressure" of the fuel, especially in warm weather and at high altitudes.
The higher the vapor pressure, the easier the fuel boils. It is possible, indeed common, for fuel to boil in a carburetor float bowl. When it does, the mixture is leaned out and performance suffers.
Taken from the Racing Beat Website.
Last edited by mar3; 04-20-11 at 02:06 PM. Reason: Merged back-to-back posts...
04-19-11, 04:07 PM
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Good quality unleaded fuel is best for spark plug life. In racing, it is desirable to use moderately high octane fuel (95 to 105 octane) although even 90 octane may suffice. More important is the "vapor pressure" of the fuel, especially in warm weather and at high altitudes.
The higher the vapor pressure, the easier the fuel boils. It is possible, indeed common, for fuel to boil in a carburetor float bowl. When it does, the mixture is leaned out and performance suffers.
Taken from the Racing Beat Website. -
The higher the vapor pressure, the easier the fuel boils. It is possible, indeed common, for fuel to boil in a carburetor float bowl. When it does, the mixture is leaned out and performance suffers.
Taken from the Racing Beat Website. -
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