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Bren67Cuda904
PostPosted: Mon Mar 12, 2007 10:55 am 
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We are at 9.6:1 and still 30 in the hole. I want to get the pistons up a bit more but I am limited to 93 pump gas. I have been told there is some 100 octane shell fuel around here but I have seen it and haven't looked. I think 9.8:1 is the highest you can go without detonating. I don't mind running the timing back some to get away with the higher compression on the street and bump it up with racing fuel at the track. I am worried about melting the manifolds retarding it to much.
What are your mearsured compression ratios and what octane fuel are you running? Do slant6's resist detonation more than other engines?
Your input is appreceated.
Brennan

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70valiant
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PostPosted: Mon Mar 12, 2007 2:18 pm 
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I am running 9.8:1 compression and 87 octane with 10* inital and 18* mechanical advance.

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Doc
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PostPosted: Mon Mar 12, 2007 2:36 pm 
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What cam will you be using?
Are you trying to get quanch/squash off the head?
DD
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Bren67Cuda904
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PostPosted: Tue Mar 13, 2007 10:09 am 
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The cam we're using.
240 @ 50 degrees
30 degrees overlap
.520 lift

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Bren67Cuda904
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PostPosted: Wed Mar 14, 2007 10:50 am 
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bump

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Doc
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PostPosted: Wed Mar 14, 2007 11:11 am 
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Ok... I will say it.
The cam you have listed should support more then 9.6 compression.
DD
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Bren67Cuda904
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PostPosted: Wed Mar 14, 2007 1:33 pm 
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Whats the max you would go on 93 octane with this setup?
Cam listed above.
3.59 bore
4.25 stroke
1.865In
1.5Ex
470cfm holley
Dutra/halfDual

I supose if I get it to high I could always put the stock stroke back in it. :x

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Bren67Cuda904
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PostPosted: Thu Mar 15, 2007 5:15 am 
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I am thinking 10.4 is the number I going with. Hope it not to high for 93.

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