coal miner Posted August 2, 2014 Report Share Posted August 2, 2014 We'll I picked up a set of 243 heads out of a 07 vette. I have a couple questions I need answered. What cr will I have when I bolt these on with stock head gasket? How small of a head gasket can I go with and what will the cr be then. What's max lift on these springs? They look like the yellow ones. Sent from my iPhone using Tapatalk - now Free Quote Link to comment Share on other sites More sharing options...
chawkins6789 Posted August 2, 2014 Report Share Posted August 2, 2014 I think it should have the same CR as a TBSS which is 10.9 I think. Im not 100% on that though Quote Link to comment Share on other sites More sharing options...
12'SROCK Posted August 3, 2014 Report Share Posted August 3, 2014 10.9 compression with stock gaskets. If you do a cam change the springs. Quote Link to comment Share on other sites More sharing options...
coal miner Posted August 3, 2014 Author Report Share Posted August 3, 2014 (edited) What's the max cr on pump 93? Edited August 3, 2014 by coal miner (see edit history) Quote Link to comment Share on other sites More sharing options...
12'SROCK Posted August 3, 2014 Report Share Posted August 3, 2014 What's the max cr on pump 93? Really depends on difference things. Tune, DCR is what matters most not SCR. I'm running 11.5 on 91. Quote Link to comment Share on other sites More sharing options...
coal miner Posted August 3, 2014 Author Report Share Posted August 3, 2014 Really depends on difference things. Tune, DCR is what matters most not SCR. I'm running 11.5 on 91. how much should I have milled off on the heads to bring the cr on up? And I'm guessing I'll need a custom grind cam to keep the dcr where it needs to be. Quote Link to comment Share on other sites More sharing options...
1BAD2K Posted August 3, 2014 Report Share Posted August 3, 2014 How high are you wanting to get the cr up? Lol Quote Link to comment Share on other sites More sharing options...
coal miner Posted August 3, 2014 Author Report Share Posted August 3, 2014 High as possible and safely run 93. Idk how much milling the heads will effect ptv clearance. Quote Link to comment Share on other sites More sharing options...
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