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hey guys i havent been on here in a really long time as this car my dad and i built we sold 4 years ago and i just recently got it back after my dad passed away from the guy we sold it to. anyway now has come the time where i want to do some upgrades to the car as its been built the way it is now since june of 2010.
i have a 408 with -12cc mahle pistons and stock ls3 heads. right now im around 9.5:1 compression according to the online calculators. and i want to jump it up to 11.5 or even 12.1 compression. what would be the easiest way to accomplish this? pull the mahle pistons out and go with a ls3 specific piston or should i just mill the heads? i know i cant get the compression im looking for with just a mill of the heads but curious what everyone is doing to get decent compression without compromising PTV clearance. when i put the heads on i checked the clearance and i had MILES of room but i also want to change camshafts with a more ls3 friendly cam, it currently has a 235/240 .603/.609 112lsa and makes 460/470 to the tire the way it sits.
thanks for the reply guys, i was gonna keep the low compression and do a s480 on it but my dad was the type to not cut his cars up and i dont want to do that, he did however love nitrous and i was thinkin about upping compression and a new cam with maybe a 200 shot down the road. id like to achieve 500-550 rwhp na and then the nitrous on top i have the supporting mods mcleod street twin(old school 3 finger pressure plate) tick MC with a stage 5 t56 with viper cluster and 12 bolt
Last edited by VIPER EATER; Oct 24, 2014 at 05:01 PM.
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408 with ls3 heads 
