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Re: [T3] Timing and Cheap gas


On 13 Jul 99, at 9:39, Nico teWinkel wrote:

> I read in the Muir Idiot's Guide that we can run cheap gas in our cars
> (octane 84 instead of 91)Kx0djust the timing to the left (?) a degree
> or two.

This really is a VERY complicated question and the answer depends on 
many things. The most important is your compression ratio. 

The short answer is that you can use whatever gas eliminates knock in 
your engine. There is ABSOLUTELY no benefit to using higher octane 
gas than is necessary to eliminate knock. The catch is that it is 
possible to have knock that you can't hear (especially if you have a 
loud exhaust) that can still damage your engine. So this is something 
to be careful with.

Jim
-
*******************************
Jim Adney, jadney@vwtype3.org
Madison, Wisconsin, USA
*******************************

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