ok so i got a sohc swap to take its place..... i wanna midly build my jdm gsr motor, its going in my 94 si hatchback. i was wondering what would be needed to get some good numbers, i know pistons, cams, intake manifold, clutch, flywheel, cam gears, header, exuast. what kinda pistons shold i get? should i sell thegsr head, and get a b16a head? i need some help deciding! thanks

 

go with the JDM ITR's... (p73-00's)... and keep the gsR head

 

Good luck! I'm doing the same thing just little by little..My next couple of upgrades are, Sending the P72 head i just bought off a friend to get ported and polished and milled .020...Hopefully that gets me over 11:1, and a larger throttle body 67-64mm and hondata...

After looking at a GSR dyno tuned with hondata that made about 15 less whp then I do, but had 20 more whp @ 5,000rpms then my car..All with similar mods sold me on hondata..

I can't afford the down time at this time of the year so i can't do a piston upgrade..But I would love to do an 84.5mm piston upgrade to get extra displacement...

 

so i should go with some JDM ITR pistons? where could i buy some of these? and if installed what would my compression ratio be? what abou tthe head? ITR cams, and skunk 2 manifold with plastic gasket.

 

the JDM CTR pistons will give you a better C/R right around 12:1

 

How much do you have to work with? I would go with either JDM ITR pistons or even some b16a pistons. Would also be good to go with some cams to match. Depends how much you're willing to spend and what your goals on your setup are.

 

im not all that rich so im goin with a mild build up. Also with the CTR pistons my CR would be really high, is that safe for daily driving? 12;1 is really high

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Hybrid CRX &raquo;</TD></TR><TR><TD CLASS="quote">im not all that rich so im goin with a mild build up. Also with the CTR pistons my CR would be really high, is that safe for daily driving? 12;1 is really high</TD></TR></TABLE>not tuned, daily driver get it tuned

 

I used ITR (US spec) in my GSR, and noticed quite a bit of difference.


Recommended:

ARP rod bolts
deck head
Valvetrain upgrade
Cams
Port the GSR maifold and get new butterfly plates made up (cheap)
Good header (Even the modded Edelbrock will work well)
Hondata (or a minimum of VAFC)

Keep the GSR head for the smaller chambers!

 

whatever i get it will be tuned, also i am getting the AEBS manifold, and plastic gasket from hondata. Still deciding on what pistons i want.

 

should my rods be fine, btw?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Hybrid CRX &raquo;</TD></TR><TR><TD CLASS="quote">should my rods be fine, btw?</TD></TR></TABLE>


They should be fine. The weak link is the rod bolts, but the ARP's take care of that!


Think about the JDM ITR's if you want more compression, or the USDM's if you want more "room for error". (Bad tank of gas on a road trip.)

 

so basically right now im goin with...

stock jdm gsr rods with ARp rod bolts
CTR or JDM ITR pistons


What head gasket should i get? stock?


probably ITR cams, and valve train
AEBS Intake Manifold with plastic Hondata gasket
intake
JDM 4-1 header
exuast of some sorts
cluth and flywheel


should turn some ok numbers but nothing drastic

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Hybrid CRX &raquo;</TD></TR><TR><TD CLASS="quote">so basically right now im goin with...

stock jdm gsr rods with ARp rod bolts
CTR or JDM ITR pistons


What head gasket should i get? stock?


probably ITR cams, and valve train
AEBS Intake Manifold with plastic Hondata gasket
intake
JDM 4-1 header
exuast of some sorts
cluth and flywheel


should turn some ok numbers but nothing drastic</TD></TR></TABLE>


Stock headgasket with JDM ITR's will be your best bet.
Check out a bit more serious of a cam setup though.

 

well with the money setup right now itr cams would be the best set-up. further down the road if i get serious i would run some toda spec B's or C's

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Hybrid CRX &raquo;</TD></TR><TR><TD CLASS="quote">well with the money setup right now itr cams would be the best set-up. further down the road if i get serious i would run some toda spec B's or C's</TD></TR></TABLE>


Plan to spend $$$ on the valvetrain too!

 

just found an ok deal for $460 i could get some ITR cams, valve springs, and retainers.


does this sound like a good deal?