What Gas Should I Use?

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04-30-2003, 12:34 PM

#31

j9fd3s

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Join Date: May 2002

Location: California

Posts: 22,465

Quote:

Originally Posted by RX-7Aggie' date='Apr 29 2003, 07:33 PM

[quote name='j9fd3s' date='Apr 29 2003, 04:40 PM'] no its doesnt, the turbo "adds" compression. just the ratio of largest chamber volume to smalest chamber volume does not tell you what octane you can run, nor what cylinder pressures are gonna be like. i think a stock t2 will run on 87 cause they cant have the think blow up if you put the wrong gas in the tank, but they recommend 92+ octane in the book.

mike

i take it this has something to do with the knock sensor? does the engine controller cut boost or spark when it senses detononation? [/quote]

well yes, but the t2 one is slow and it cant pull enough timing to help much. newer cars are a lot more flexible about gas, the t2 isnt

mike