just wanted to know y majority of all motor ls/vtec builders choose P30 pistons over PCT ek9 pistons, doesn't the civic type r pistons have more compression and isn't that what u want in an all motor application?

 

compression needs to be matched to octane, and the CTR pistons are just plain heavy.

 

dont p30 piston's yield 11:5, while pct pistons put you around 12:5 or maybe even higher?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by b20beast978 &raquo;</TD></TR><TR><TD CLASS="quote">dont p30 piston's yield 11:5, while pct pistons put you around 12:5 or maybe even higher?</TD></TR></TABLE>

yes but as combustion pointed out...

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Combustion Contraption &raquo;</TD></TR><TR><TD CLASS="quote">compression needs to be matched to octane, and the CTR pistons are just plain heavy.</TD></TR></TABLE>

I think most engine builders will agree that the quality of compression is at times far more important than the quantity of compression.

 

I think most engine builders will agree that the quality of compression is at times far more important than the quantity of compression.


good point

 

good stuff P30 it is

 

P30's require no modification to fit the LS rods.
P30's have better flame travel across the piston than CTR's.
P30's weigh less.

 

can you just slap these pistons on a gsr block or does it neeed to be honed?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Mhollaek9 &raquo;</TD></TR><TR><TD CLASS="quote">can you just slap these pistons on a gsr block or does it neeed to be honed?</TD></TR></TABLE>
depends on the condition of your cylinders

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Mhollaek9 &raquo;</TD></TR><TR><TD CLASS="quote">can you just slap these pistons on a gsr block or does it neeed to be honed?</TD></TR></TABLE> Yup, if they are new and have the correct piston to wall clearance.

 

does a machine shop have to do it? my motor is very healthy so how can I do it myself?

 

If you know what your doing....yes.
If not id pay to get it installed.

 

are jdm p30s better den jdm p73s in a gsr

 

JDM p30's in a GSR will have more compression than the P73's but the "style" of piston is the same. Neither have a huge dome so both will work well.

 

how many miles are on the block ur putting the p30's in??? cause if its high mileage it might not be a bad idea to replace the rod bearings and crank bearings. just to be safe.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Sam92Teg &raquo;</TD></TR><TR><TD CLASS="quote">P30's require no modification to fit the LS rods.
P30's have better flame travel across the piston than CTR's.
P30's weigh less.</TD></TR></TABLE>

Don't forget timing. What's is the point of having alllll that compression from a high dome CTR piston, and then have to pull out more and more timing. Timing is where the power is, and you can run more of it safely with a P30.

 

i was reading somewhere where these pistons are are a better choice to make higher compression when going for all motor in a b16a2 then the stock b16a2.


Modified by dis1civicsiguy at 4:37 AM 8/31/2007

 

BUMP CUZ I JUST GOT MY OVERSIZED P30S IN THE MAIL