So I keep going back and forth with my bottom end build of my B18c1.

I am now looking into just going with some OS Jdm ITR pistons (have herd they are very difficult to come by). OR maybe some PR3 or P30. I am looking to get my compression to around 11.5:1. What are your opinions on each? do I need different rods for the PR3 or P30 pistons?

I also have a GSR head with all itr interals. Itr valves, itr valvesprings, and retainers. Skunk2 stage 1 cams , skunk 2 IM and bored out throttle body.

If im running 11.5:1 compression I would want to get some Stage 2 cams. I have been told that my ITR springs will not hold up. Too much coilbind. What valve springs would be good for this setup? Do i need to upgrade my fuel system? IE injectors and pump? I do plan on getting hondata.

 

Hondata s200, skunk2 stage 2, yes replace the springs/retainers. I'd say P30.
And I see no reason for you to change your injectors or fuel pump.

 

Injectors no, but you may want to get a better fpr, and if you have a zillion miles on the car, it wouldn't hurt to get a walbro 190 pump to replace the original. get a a/f guage for tuning if you don't have one already.

 

Anyone elese wanna give me some imput. id appricate it

 

Hondata S200 would be a great choice for engine management. Your stock fuel injectors should be fine, however I would recommend an adjustable FPR. Your stock fuel pump will also be fine, but you may want to consider upgrading or replacing if you have higher mileage. A Walbro 255lph pump would be my choice. As for rods/pistons if you do not want to go the forged route then the P30 pistons will yield a C/R around 11.5:1 with your GsR head and will fit on your P72 rods. 11.5:1 C/R would also be my compression choice in a pump gas street driven N/A setup . As for the cams I would definitely upgrade to the Skunk2 Stage 2's with the higher compression ratio to maximize your engines potential. I would recommend Skunk2 valvesprings and retainers as well. The ITR valvesprings will be pushed pretty hard with the Stage 2 cams.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by GsRBABY &raquo;</TD></TR><TR><TD CLASS="quote">Hondata S200 would be a great choice for engine management. Your stock fuel injectors should be fine, however I would recommend an adjustable FPR. Your stock fuel pump will also be fine, but you may want to consider upgrading or replacing if you have higher mileage. A Walbro 255lph pump would be my choice. As for rods/pistons if you do not want to go the forged route then the P30 pistons will yield a C/R around 11.5:1 with your GsR head and will fit on your P72 rods. 11.5:1 C/R would also be my compression choice in a pump gas street driven N/A setup . As for the cams I would definitely upgrade to the Skunk2 Stage 2's with the higher compression ratio to maximize your engines potential. I would recommend Skunk2 valvesprings and retainers as well. The ITR valvesprings will be pushed pretty hard with the Stage 2 cams. </TD></TR></TABLE>

255 is overkill. save it for the turbo in your avatar.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by SuperSlow &raquo;</TD></TR><TR><TD CLASS="quote">

255 is overkill. save it for the turbo in your avatar. </TD></TR></TABLE>

A 255lph pump may be overkill, but I like to believe there is no such thing as overkill when it comes to the safety of my engines.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by GsRBABY &raquo;</TD></TR><TR><TD CLASS="quote">A 255lph pump may be overkill, but I like to believe there is no such thing as overkill when it comes to the safety of my engines.</TD></TR></TABLE>

As I said,
Hondata S200
Skunk2 stage 2 cams
Replace the springs/retainers(you don't need duel springs)

 

I know this is all a matter of the builder and tuner's capibilities, but with this setup you all are quoting, what types of #'s would you expect to see? could you use stage 3's with 11.5:1 CR or is that too low?

 

Skunk2 does not make stage 3 cams anymore, at least, not for certain series motors, all I know is that the highest stage cam for an h series is now a stage2.
And for that rate of compression I'd use stage 2's.
Depending on your previous setup, the skunk2 cam swap could produce as much as 11 additional whp.

 

I do have a B&M FPR and guage.

And theres no way I'm running stage 3's. I believe stage 2's will be perfect for the setup.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by cjohnson_2 &raquo;</TD></TR><TR><TD CLASS="quote">I do have a B&M FPR and guage.

And theres no way I'm running stage 3's. I believe stage 2's will be perfect for the setup.</TD></TR></TABLE>

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by cjohnson_2 &raquo;</TD></TR><TR><TD CLASS="quote">I do have a B&M FPR and guage.

And theres no way I'm running stage 3's. I believe stage 2's will be perfect for the setup.</TD></TR></TABLE>

what do you plan on doing with your stage 1 set up ?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Slain &raquo;</TD></TR><TR><TD CLASS="quote">

what do you plan on doing with your stage 1 set up ?</TD></TR></TABLE>

Sell it of course!