ok im looking at buying this guys jdm itr block, the guys says it was bored and honed to 81.5mm

and iv got a good friend thats got a set of spoon jdm itr pistons, that he will sell me for cheap

so i was wondering what size are the spoon pistons, like will they fit in this guys block that was honed and bored


thanks


also what kinda comp ratio will these pistons put me at, i was thinking of using a spoon headgasket also

 

Spoon OS pistons IIRC only go up to 81.25.

You'll have to get some aftermarket alternatives like from RS Machines or something.

http://www.zealautowerks.com/index.html

try that for compression.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 01-0720 &raquo;</TD></TR><TR><TD CLASS="quote">also what kinda comp ratio will these pistons put me at, i was thinking of using a spoon headgasket also</TD></TR></TABLE>

spoon pistons are just regular JDM ITR pistons that have been "balanced". on stock ITR rods in a b18c block with b18c crank you will have a compession ratio of 11:1.

 

the "balancing" is done by weighing hundreds of jdm itr pistons and grouping them into sets of 4 with the most equal weights

 

and how much do they charge for this honour?

 

thanks for the info guys


even though this way whould be alot less expensive, i think im gonna stick with my original idea and keep my block and build my motor, gonna go with oversized oem ctr pistons, and skunk2 pro2's etc etc


thanks again

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 01-0720 &raquo;</TD></TR><TR><TD CLASS="quote">gonna go with oversized oem ctr pistons, and skunk2 pro2's etc etc
</TD></TR></TABLE>

Do not run CTR pistons. You will make more power with P30 pistons, even though they are less compression. PCT pistons (CTR) have a horrible dome design that hinders flame travel and combustion efficiency, plus you will have a very hard time with clearances with Pro2's and PCT's.

My $.02

 

again some excellent information, thanks alot
can i still get new oversized oem p30's?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 01-0720 &raquo;</TD></TR><TR><TD CLASS="quote">again some excellent information, thanks alot
can i still get new oversized oem p30's?</TD></TR></TABLE>

Yes.

We've built a few mild 1.8's with P30's and Blox B with simple bolt-ons, all of them have broke 200whp.

 

excellent that gives me hope

thanks again

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 01-0720 &raquo;</TD></TR><TR><TD CLASS="quote">ok im looking at buying this guys jdm itr block, the guys says it was bored and honed to 81.5mm

and iv got a good friend thats got a set of spoon jdm itr pistons, that he will sell me for cheap

so i was wondering what size are the spoon pistons, like will they fit in this guys block that was honed and bored


thanks


also what kinda comp ratio will these pistons put me at, i was thinking of using a spoon headgasket also</TD></TR></TABLE>

you have 5000 plus posts and you are asking stupid questions like this??? have you not read a thing in this forum??

 

sorry i dont memorize piston sizes

 

it's not about memorizing....Chad was getting at that little red link at the top right corner....