hey everybody, just wondering if anyone had some knowledge on the subject, im getting my heads P&P'd right now, in town guy, very good is hookin me up with a stage 2 job. problem is we cant decide if we wanna mill the heads or not and how much. i am running www.cylinderheadspecialties.com heads and they have 2.00 intake and 1.56 exhaust valve plus i have the lt4 hotcam (218/228 and .525" @.050) i have the stock pistons and the block has never been decked either but i am already running the thinner head gasket ( i think .039 or something) so i was just wondering how much room i have to mill on the heads before i either hit the valve on the top of the piston or i go above 11.0:1 CR. with my current tuning from pcm4less im already running 93 octane so i dont want to go over an 11:1 CR. i know stock is 10.4 or 10.5 but i dont know how much the thinner head gasket bumps it up either. so anyways i was hopin someone could help. thanks in advance
joe

 

You will have to know how far the piston is in the hole.Stock is about .020 but it needs to be measured..008 is about 1CC,so you need to figure up your static and dynamic compression you are running now and go from there.Up to 9.0 to 1 dynamic is OK on pump gas.