compression with what gas/power/cubes

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Mar 26, 2010 | 01:56 AM

daniel6718

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From: garland tx

compression with what gas/power/cubes

what are yall guys running...mostly concerned with compression then gas

i was thinking about putting together a mid to high 9:1 motor...ive got a chance to get a block combined with my current heads make it 10.1:1...i think its a little high and id have to run racegas all the time...although im considering racegas all the time...still not sure i wanna go that high...
stock cube motor with afr 205's wanna push it till it pushes water

Mar 26, 2010 | 04:49 AM

blk00ss

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From: Jasper, AL

I just dynoed my junk the other day. 10.8:1 compression, 93 octane, 14* of timing, 10lbs with no detonation at all. Don't be skeered

Mar 27, 2010 | 04:20 PM

elias_799

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From: toronto ontario canada

at 10.1:1 cr with blower/turbo i would seriously consider spraying meth

on my build i went with 8.6:1 CR

15 psi on pump gas no meth

Mar 27, 2010 | 05:38 PM

daniel6718

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From: garland tx

well ill prolly run c16...id like to keep it simple no meth

Mar 27, 2010 | 09:23 PM

bonnarls1

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run e85 you'll have no issue!!!!

Mar 27, 2010 | 09:27 PM

MY99TAWS6

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From: Kelowna,BC

My builder basically said if you are going to run 9.5 on pump and decent boost levels good to have alc/meth which did just get.
He said 9 to 1 without alc/meth and 8.5 if wanted to run big boost on pump with no alc/meth.
Track can get by with higher as likley would be running race or alc/meth as well.

I was worried car might get doggy if went down on compression and you will lose power as you drop compression off boost and will have less power on boost unless you boost higher to compensate.

Mar 27, 2010 | 11:49 PM

daniel6718

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From: garland tx

e85 i hear is inconsistant...but a kool option

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Mar 31, 2010 | 02:11 AM

SincalT/A

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From: Currently In suspense.

Quote:

Originally Posted by NAVY

my engine 10.3 cr with F1C 18psi 14* timing

Real interested in the cam specs you got there boss.......Thats alot of cylinder pressure.
Feel free to pm me if you dont want everyone to know.

Mar 31, 2010 | 07:31 AM

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98SuperchargedLs1

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i think compression is fine.. alittle high for boost but you see all the ls2 gto/corvettes run 8-10psi with no problems and the compression that they have is 10:9:1.. no meth. i'll be running a ls2 10:9:1 in my 65 chevelle with a gt40 and im going to run 8psi. snd should put me into the mid 500rwhp range