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higher compression ratio and stock twins

586 Views 1 Reply 0 Participants Last post by  badtoy
I saw an article in a uk import magazin that a guy changed the enginge compression ratio to 8,9:1 together with upgraded stock twins. he but down 500 crank-bhp at 1,1 bar boost:eek:
what is the benefit in changing the compression ratio to 8,9:1?
I know that the a/f mix volume will be less. Is that means that the stock twins will be more efficent?
I saw that the porsche 996 turbo/gt2 has 9,4:1.
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