just need to know what im looking at with my head/block/piston/gasket combination, don't quite understand the math used.

what i know
d16y7 block
JE pistons 9:5:1 with ceramic coating
JE rings
stock micropolished/balanced y7 crank
OEM y7 headgasket
Z6 head (stock) ARP head studs
eagle h beam rods (stock length 99% sure) arp2000 rod bolts


i have heard rumors that i can drill out the brass rivets in the headgasket (oem) and by eliminating one or more of the layers i can up the compression??? if so what am i looking at compression wise at that point? motor has 0 miles since build from oil pan up, going to run n/a until i get all of my turbo stuff and my manifold made, will run cometic headgasket once boosted. any help/info greatly appreciated!

 

why do you want to raise the compression if your going turbo?

 

just for more power, also i have some itb's i made that i was going to run until then and to my understanding they make more of a difference with high comp as opposed to low.

 

Can't get a number for the 9 5 to 1 pistons. If you had stock z6 pistons with everything else you'd be around 8 9 to 1
try it yourself:
http://www.c-speedracing.com/howto/c...c/compcalc.php

 

yea i used that and idk.. i was told that if u run a d15b2 bottom end with an d16a6 head that it bumps the compression to 9.8.. with stock headgasket and stop pistons.. thoo.. does anyone know if u can put the pm7/dohc zc pistons in the b2 block and it work?

 

i should prob add that the pistons are 78mm

 

You dont want high comp for turbo>> do some research';

 

Im doing a similar build except the pistons are vitaras with eagle h beams. it all depends on piston to deck height, my CR is 9.1:1... by the way if your going boost, turbos love low compression

if this is how your piston/deck height looks like then the CR is almost the same as mine