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tdwepn
rice boy


Joined: 10 Apr 2002
Posts: 41

PostPosted: Thu Dec 04, 2003 10:16 pm    Post subject: HIGH compression Reply with quote

Gday
If I have 11.5:1 compression would i get away with using premium fuel (optimax,bp ultimate) and a top notch octane booster? or would i have to retard the timing still if say it was running on about 8deg btc?

thanks 4 replys
mart-o
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Loz
backyard mechanic


Joined: 05 Oct 2001
Posts: 943

PostPosted: Thu Dec 04, 2003 11:14 pm    Post subject: Re: HIGH compression Reply with quote

I would lock your dizzys weights and only use the vacuum advance. This should stop the total advance before it start to give troubles.
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Gemini Driving Yobbo
petrol head


Joined: 26 Feb 2002
Posts: 3897

PostPosted: Fri Dec 05, 2003 12:12 pm    Post subject: Re: HIGH compression Reply with quote

my old engine the compresion was over 10:1 and i would only run it on optimax
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