Ok, well i went through some searching and was thinking of going bottom end: JDM ITR pistons OS.25, ITR Rods, ARP Rod Bolts and stock GSR crank on b18c1. I'm trying to aim for +210-220 WHP on this bottom end. Would i need some stronger components than just this??? Should i balance/polish the crank? I'm just focusing on bottom end right now, want to finish that up first.

Any other suggestions or tips before i start spending some cash would be appreciated!!

 

bizump...Help?

 

Your going to need a lot of work to get 210-220 whp. Your going to need a built motor and possibly sleeved to a 2 liter. Your going to need head work, valvetrain, and built block with some high cr like 11-12.5 around there. Yes i would have it balanced and blueprinted and a lightened crank would help also. Its going to take a lot to reach that mark. Hope you have a lot of money to spend.

 

Yes, their are many people with 84-85mm bored setups reaching 210-220 whp easily, but i don't think my goal is unrealistic w/o boring. There are also people reaching 200+ whp on PM ITR setups, without boring or added displacement..
I think i could reach 220 limit with lots of tuning, GOOD header, and a GOOD pair of cams w/ bottom end i listed above(JDM ITR pistons, balanced crank, type r rods, also looking towards a spoon headgasket)

These are two main questions i'm looking for answers also:
Would i need some stronger components than just this??? Should i balance/polish the crank?

Any other help or advice, please!

 

H22 with good boltons and valvetrain and tuning u are there

 

i know that you can reach 210-220 cause i have done it with my motor now and its a fully built gsr 81.5mm running 12.5:1 comp. Its a lot of work though. Just adding pistons and rods and bolt-ons isnt going to get you 200whp. Your going to need headwork and valvetrain to accomplish your goal on a b18c.

 

I don't think you can fit itr rods on a gsr crank, (don't quote me), and you will also have to think ahead because perse if you go w/ your itr pistons you'll get what 11:1 but less than 12:1 compression. what if your Camshaft need higher compression? so it all comes down to a lot of planning.

Definitely port and polish your head because that is the way to go, look into Portflow or better yet Alaniz-technologies.

A custom header, smsp, hytech, header-tech

some big cams, skunk, jun, etc. upgraded valve train

portmatch the intake manifold to the head, then portmatch the tb to the intake manifold. (make sure you open up that tb to at least 65mm-70)

good luck on your project

oh and don't forget to Baffle that oil pan, hahaha.

 

i think you can reach that, closer to 210 than 220 though. but why dont you go with the pct pistons, its a lil higher compression but it would help out a lil,if anything just retard the timing a lil, is race gas an issue to you or something? and get it tuned and spend a lil money on some good injectors. but as far asa building your block, just go for it, the rods arent really needed you can just use the gsr rods, but you should polish the crank, balance and if you want, knife edge it

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 96turboteg &raquo;</TD></TR><TR><TD CLASS="quote">i know that you can reach 210-220 cause i have done it with my motor now and its a fully built gsr 81.5mm running 12.5:1 comp. Its a lot of work though. Just adding pistons and rods and bolt-ons isnt going to get you 200whp. Your going to need headwork and valvetrain to accomplish your goal on a b18c.
</TD></TR></TABLE>

Thank you, i know this, but you're giving me info i never asked for, read my questions, i posted, thanks!! I asked if my bottom end components can hold that much power.

 

Thanks for replies so far, but need more input.

 

i would sat that if you are doing some bottom end work then why not go with a forged lightwieght piston for less mass and more effiency. besides with a 12.5:1 compression, you goal will be much easier to reach. FWIW

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by andrewasf77 &raquo;</TD></TR><TR><TD CLASS="quote">i would sat that if you are doing some bottom end work then why not go with a forged lightwieght piston for less mass and more effiency. besides with a 12.5:1 compression, you goal will be much easier to reach. FWIW</TD></TR></TABLE>

i agree, if youre going to be taking apart the block and dont want to bore it, at least get some lighter pistons with a higher comp ratio, they might be a little more expensive than itr pistons, but they will def be worth it, if you have the chance it would be a good idea to get the block honed while youre at it

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by dragonz04 &raquo;</TD></TR><TR><TD CLASS="quote">I don't think you can fit itr rods on a gsr crank, (don't quote me), and you will also have to think ahead because perse if you go w/ your itr pistons you'll get what 11:1 but less than 12:1 compression. what if your Camshaft need higher compression? so it all comes down to a lot of planning.

</TD></TR></TABLE>

Are you sure about this, does somebody know if ITR rods won't fit on my GSR crank??

 

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

Are you sure about this, does somebody know if ITR rods won't fit on my GSR crank??

</TD></TR></TABLE>

i disagree, im almost positive ITR rods fit a GSR crank. but someone back me up on this

 

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

i agree, if youre going to be taking apart the block and dont want to bore it, at least get some lighter pistons with a higher comp ratio, they might be a little more expensive than itr pistons, but they will def be worth it, if you have the chance it would be a good idea to get the block honed while youre at it </TD></TR></TABLE>

I am going to go with a bore and hone .25 oversize with the JDM ITR pieces, and balance these too. I want to stick honda components bottom end..Picky me huh?? haha. My compression goal is also 11.9:1 MAXIMUM. Also planning to go with B16 head, and spoon headgasket. If my compression runs low, i'll mill the head. Also looking into some S2S2 or S3 cams depends, but this will be searched for later on.

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by andrewasf77 &raquo;</TD></TR><TR><TD CLASS="quote">

i disagree, im almost positive ITR rods fit a GSR crank. but someone back me up on this</TD></TR></TABLE>

This is what i thought also. I'm pretty sure they do, but then again we can both be wrong...Anybody??

 

i know you said you're concentrating on the bottom end for now but you're never gonna get there without some killer head work, and a lot of it. A regular P&P isn't gonna do it. If I were you I would go with JDM p30 pistons for a little more CR and then mill the head to get to that 11.9:1 you're talking about. You could go with some flat faced valves to gain some CR too. Oh and don't forget about a killer header. You're gonna need an SMSP, Hytech or a DTRFab header to hit that mark. I don't think an off the shelf header is gonna cut it. Good luck and I hope your pockets are deep. The bottom end is going to be cheap compared to the head.

s

 

More details on JDM p30s??? Don't know much about them. How much more compression? Remember i also plan on running w/ spoon headgasket and milling head.(I'll be doing some searching) EDIT: REMEMBER I'M GOING .25 OVERSIZE.

Yes i know, if i'm not focusing on too much compression, or not to much on bottom end, headwork is going to have to be killer, and alot of $$, but i won't be doing that all at once. How does s2s3 cams sound for my setup??

Thanks for all the input guys. Alot of help, more would be even better.

EDIT: I did some research, saw the p30's are higher compression. So in terms of compression, i'm going to probably get p30 slugs, b16a head. What compression will i get with milling the head and a spoon headgasket?


Modified by JDMCRXDelSol at 10:23 PM 5/19/2004

 

Your going to need a built motor to run skunk2 stage 3 cams. Your head would need to be pnp and a good valvetrain to go along with it plus alot of compression also to get the full potential of the cams. Running bigger cams you need a built head, stock isnt going to cut it. I would think about getting sks2 cams NOT the stage 3 cams there for more of a race setup.

 

You can use ITR rods with the gsr crank. A buddy of mine is right now.

 

Another quick question. What compression would i yield with CTR +.25 pistons on my gsr bottom. Remember i will be running a b16a head. If compression was not higher than 11.8 w/o milling head, spoon headgasket, would i be good??(Save some cash, and CTR pistons are in abundance)

I think this is a good question, have not seen one thread on this.

Anybody??

 

Please help me

 

?????????????????????????????????????????????????? ??????????????????????????????

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by JDMCRXDelSol &raquo;</TD></TR><TR><TD CLASS="quote">Another quick question. What compression would i yield with CTR +.25 pistons on my gsr bottom. Remember i will be running a b16a head. If compression was not higher than 11.8 w/o milling head, spoon headgasket, would i be good??(Save some cash, and CTR pistons are in abundance)

I think this is a good question, have not seen one thread on this.

Anybody??</TD></TR></TABLE>

compression should be around 11.8. You're focusing too much on compression, some guy here is making 217 whp with only about 11.2 compression and toda Cs, PNP head, DTR header...

IMO, I believe hp is more dependant upon headflow than compression...

Tuning is also key.

 

BTW, if you're going to use B16 pistons..you're going to have to mill the small end of your rods for it to fit.

ITR rods will fit on a GSR crank.