will this change the compression #s from the stock gsr #s? i want my comression somewhere in the high 11 range and im wondering what i will need to do to get it there. heres what is going together:
gsr block
JDM ITR pistons
JDMITR rods
gsr head
3 angle valve job
type r valves
skunk2 ti retainers
skunk2 valve springs
skunk2 stage 2 cams
skunk2 intake mani.
spoon cam gears

the head has not been shaved, can anyone tell me what the compression will be with those pistons? if it does not effect the compression what headgasket would you recomend to get me in the 11.6 - 11.8 range?

i have a SGT tuned ecu (skunk copy) i will be running and im shooting for 205whp. any sugestions on anything are apreciated.

 

civic type r pistons would get u into about 12 compression

jdm type r pistons would get you about 11.3

according to the cspeed calulator that is

 

thanks, so what head gasket could i use to bump me up another .5? id like to be right under the 12.0 mark.

 

No head gasket is going to bump you up that high. Get differnt pistons or mill the head.

 

ok, so i should just ditch the itr pistons and go with the ctr's.

 

CTR's will put you at around 12.3:1. Depends on what cams, any head work, what you are using to tune etc...

For the compression you are wanting just do O/S JDM B16A pistons (P30).

 

i posted everything i have in the 1st post. so if i use the ctr pistons it will put me at around 12.3 ok, if im at 12.3 will i have any problems running on pump gas without constant tuning? we do get 93 octane here.

 

Yes you would need tuning. 12.3:1 can be done on 93 octane w/ stock timing.