I ordered 9:1 Wiseco pistons and a Cometic .030 headgasket for my stock gsr bored to 81.50. although whenever i punch all of the information in a compression caclulater (cspeed/zealautoworks) its saying it would be 8.3:1 CR. was i by chance sent the wrong pistons? the set i was sent has a dish of -12. how would such a low CR effect a Daily driven boosted car on say 15lbs? Thanks in Advance!

 

Same issue came up with this guy. I really dont think these calculators are accurate or they are being entered properly, It also depends on how much machining is done to the block (decking, etc.). I know this doesnt help much but heres the other thread.

https://honda-tech.com/zerothread?id=1908167

 

yeah, my motor is all stock besides being bored to 81.50mm.

 

bump

 

-12cc in a gsr motor will be a hair under 9:1, so you're fine, dont worry about it

 

wats the compresson height on the piston?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by KingOfQB &raquo;</TD></TR><TR><TD CLASS="quote">wats the compresson height on the piston?</TD></TR></TABLE>

not sure what you mean. dome is -12cc