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12:1 compression and 104 octane

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Old 02-08-2007, 10:26 PM
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Default 12:1 compression and 104 octane

I have 12:1 comp. and run 24 degrees of timing with 93 octane.If I run 104 how much timing do you think I can run?Is it worth doing?I dont want to run race gas to only pick up a tenth and 1 mph.
I'm running 10.39 @ 131.17 with a 1.52 60'

Thanks Steve
Old 02-08-2007, 10:55 PM
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good question I run 93 octane with 12:1 also and have similar times. I was told it wouldnt pick up much if any but who knows
Old 02-09-2007, 06:18 AM
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I run 104 with 11.8:1. Don't know how much timing though.
Old 02-09-2007, 09:19 AM
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Originally Posted by tektrans
I run 104 with 11.8:1. Don't know how much timing though.
I know if your run to high of an octane it will slow you down because it does not burn as fast in lower compression.
Old 02-09-2007, 11:10 AM
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Originally Posted by ls2formula
I know if your run to high of an octane it will slow you down because it does not burn as fast in lower compression.
Yeah I've heard that. Cartek told me that's what I had to run it on so that's what I've been doing since I got the motor. Maybe my motor likes more timing hence the higher octane? I don't know but I'm going to ask them again since you said that and see what they say.
Old 02-09-2007, 11:26 AM
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I run a 105 unleaded in my car, but it't about 12.8 to 1 compression. Cam has alot to do with what fuel will work too, the DCR really dictates the needed fuel as much or more then the static compression does.


That being said... I know I can run alot more timing then I have now with the 105, but we figured with a brand new motor there was no reason to really set it on kill right away, be better to get s few runs on it and shake the car out before going crazy.




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