you guys know what the compression would be if i bought 83mm 9.0:1 CR for a GSR and put it in my LS motor?

im looking to get CP pistons, but it was made for a GSR.

Acura SC7012 B18C1 3.268" / 83.0mm +.080 / +2.0mm 1.181 9.0

would it be like 8.5.0:1 ?

or should i just get these?

Honda SC7020 B - Series 3.307" / 84.0mm STD 1.181 9.0

 

anyone know how to calculate compression ratio from different heads ?

 

http://www.c-speedracing.com/h...c.php

 

PM Earl or Call/Email CP racing. For some reason they don't have the CC's of their pistons on their website, but Earl or CP will be able to figure it out for you.

 

is your block sleeved?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by lightcrx &raquo;</TD></TR><TR><TD CLASS="quote">is your block sleeved?</TD></TR></TABLE>

ofcourse, im gonna run 83mm or 84mm. dont make no sense running 83mm+ without sleeving.

 

are you worried about the lower compression or are you looking for higher compression and wonhdering if these pistons will make the compression lower than what you wnat

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by tdo &raquo;</TD></TR><TR><TD CLASS="quote">ofcourse, im gonna run 83mm or 84mm. dont make no sense running 83mm+ without sleeving.</TD></TR></TABLE>

i had to ask.... with all the dumbasses on ht asking if they can run 25 psi on stock b20 sleeves ;x

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by b18sihatch &raquo;</TD></TR><TR><TD CLASS="quote">are you worried about the lower compression or are you looking for higher compression and wondering if these pistons will make the compression lower than what you wnat</TD></TR></TABLE>

im worried about the CR being lower then 9.0:1 , i would prefer anything between 9-9.5

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by lightcrx &raquo;</TD></TR><TR><TD CLASS="quote">i had to ask.... with all the dumbasses on ht asking if they can run 25 psi on stock b20 sleeves ;x</TD></TR></TABLE>

understandable.

 

what kinda psi numbers are you looking to run?

 

is your heart set on cp?
arias has nice c/r's heres the link, look at the b18a/b pistons
http://www.ariaspistons.com/acurahonda.html

you going to use the ls head?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by b18sihatch &raquo;</TD></TR><TR><TD CLASS="quote">what kinda psi numbers are you looking to run?</TD></TR></TABLE>

15 daily

20-25 track

on 91 oct

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by lightcrx &raquo;</TD></TR><TR><TD CLASS="quote">is your heart set on cp?
arias has nice c/r's heres the link, look at the b18a/b pistons
http://www.ariaspistons.com/acurahonda.html

you going to use the ls head?</TD></TR></TABLE>

ill check those out, running LS head with crower 404's and blox intake mani with 70-72 mm TB.

 

arias got some good off the shelf pistons.

looks like im going with arias 83mm 9.2:1 cr