i have a 90 prelude Turbo...B20a5 motor...it has about 2500 miles on a rebuild...has weisco 9:1 compression pistons heres the results hot at WOT

cyl.1 163psi
cyl.2 152psi
cyl.3 154psi
cyl.4 160psi

i thought this was a lil low...i dunno anyone know what the compression is supposed to be with this compression ratio? 9:1 thanks..

 

Do a leak downtest.. my 84 mm gsr with 9.1 je pistons is 200 across with a 4 percent leakdown...

 

bump...any more input??

 

My crx engine with 9.1:1 (bone stock) has 150psi across all four. The previous motor always had 160psi.