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Discussion Starter #1
Ok i guess my noob question is
what compression ratio do you get on a stock z6?
and how much can i beef it up to still run on 91 oct gas.
and what pistons would get me that compression?

thanks guys
 
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Discussion Starter #5
Honda4VW said:
Well..compression ratio vs Octane ratings has not been directly discussed. Technically you could run 12.5:1 c/r on 87 octane...but you would be dumping a lot of fuel, and taking out a lot of timing
ok elaborate please if you dont mind :)

here is the situation, stock z6
90 oct gas available nothing beyond that at the location where the car is.
no dyno plus no ecu remapping facilities so no chance of changing timings unless there is another way.

i think z6 stock is 9:1
so what would u suggest considering this apauling situation lol
 

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If i'm not wrong CR on a z6 is 9.2:1, get a timming light and a paper clip and retard the timming your self if need to.
 
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