suggested comp ratio
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If you have concerns that you will eventually want enough power to put your sleeves at risk, simply sleeve the motor to 84mm and buy 84mm 9.0:1 pistons.
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Authorized Dealer & Tuner for: Hondata, eCtune, Neptune, AEM, Crome, Precision Turbo, Omni Power, Walbro, Innovate & more. Dyno Tuning Services, Ecu Chipping, Chipped Ecus, Conversion Harnesses, Widebands, Fuel Injectors, Fuel Pumps, Map Sensors & more.
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like mentioned 350whp will be plenty in a crx imo..anything else would be useless on the street without major mods that i wont be able to afford anytime soon...i plan to obtain 350whp..then work on the interior/exterior of the car..i just want to see if u guys think 350whp on 81.5mm sleeves will hold without problems...for atleast a yr..
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Hey i used arias 10.1:1 on my 81.5mm gsr and made 340whp @13 psi on 93, with a daily driver tune by "the king" john vega. 10:1 is better for a street car because of the simple fact that off boost you will have more throttle response and pickup. you won't be riding at 10+ boost all the time, so why not have some good power in the mean time. 8.5 is for high hp race cars(30psi). 9.1-9.5 is better, but if all you want is 340-380 whp, go with the higher comp. thats from my personal expirience.
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81.5 would be fine for 350whp just maintain the car and it will last forever. And also IM agreeing with 60-1EK 8.5:1 compression?? its not a dsm...my current setup is 9.5:1@30lbs
Last edited by T4eg; Jan 30, 2007 at 09:24 AM.
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also depending which vtec head your using raises or lowers the compression approximately .2
b16 (pre3) casting will lower the compression if your trying to figure the gsr pistons those numbers are being based on a gsr head. Hope that made sense to you Eluzzionz.
b16 (pre3) casting will lower the compression if your trying to figure the gsr pistons those numbers are being based on a gsr head. Hope that made sense to you Eluzzionz.
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yea i understand that..like mentioned though with the ls bottom end and b16 head with ur pistons itd be at 9.77 from what i calculated...since i cant find a FOR SURE -cc i went with -2cc since thats what it takes to make a gsr with 81.5 bore to 9.8:1 thx..
