I know gsr pistons have 33mm wide valve grooves and ls pistons have 31mm wide valve grooves. that prevented me from running any cam higher in lift than a type r. well b20z have around 10.5 in compression plus the higher compression from a gsr head so i think the b20z will have the compression to run skunk stage1's definetly and skunk stage2's maybe but my question is will the gsr (33mm wide) valves fit in the grooves of the b20z???? what size are they?

 

no, you have to machiene larger grooved inthe b20z pistons.

 

The b20z has 9.6:1 CR, where did you hear 10.5?

 

my bad i knew it was higher than the b20b

 

heres a pic when i opened up mine.. dont know how theywoulda worked cause i decided to go after market

 

are only the intake valves bigger?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by drunknbass &raquo;</TD></TR><TR><TD CLASS="quote">heres a pic when i opened up mine.. dont know how theywoulda worked cause i decided to go after market
</TD></TR></TABLE>

Nice, here are the ones I did.





What I did seemed to have worked fine since the motor made close to 210whp.

MassScene, I think that both intake and exhaust valves have a larger face circumference.

 

i like it a lot howd u do it. if anyone else has custom valve relief post a picture i wanna c it.

 

it will work if you cut the valve releifs like that (only the intake valves are bigger btw) but your gonna throw the piston weights way off when you do it. basically your gonna throw off your piston balance. take em out and have a machine shop do it so they can balance them when they are done, it will give you a chance to re ring the engine too.... its really no more work than all that taping off and dremeling

 

thanks for the responses guys good info

 

yowwwwwwwwww.....ek hatch...am i correct...u said u maid 210 hp on stock block???
well can u tell me your full setup???
wat head..cams...etc
torque would be nice too....also is the car still running?? how long has it been?

thanks alot

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by geoscranny84 &raquo;</TD></TR><TR><TD CLASS="quote">yowwwwwwwwww.....ek hatch...am i correct...u said u maid 210 hp on stock block???
well can u tell me your full setup???
wat head..cams...etc
torque would be nice too....also is the car still running?? how long has it been?

thanks alot</TD></TR></TABLE>

It was actually my friends car. Bone stock block with mildly worked GSR head and JUN 3 cams. That's about it except for an ITR plenum and Hondata.

Motor was running strong last I heard but I think he sold the car. Ran 12.3 in the quarter in a gutted hatch at 2,700ft elevation.

He posted the dyno a while back but half the people on here called bullshit. Doesn't really matter to me................I saw it with my own two eyes.