i've searched and been looking into this thing for a while now but i couldnt find the REAL answer. .. alot of people say it's too high of compression for street.. some say they have no problems.

so what's the real answer.? i wanna know for sure it's okay before i rebuild my motor.

B18C5
Ctr pistons (.25 os)
oem size head gasket
RM m22xx
RM valve trains
GE camgears.
310cc injectors
so on.
will be running 93-94 octance gas.

what do u guys think?
any help appricated


Modified by itr1244 at 6:48 AM 12/28/2005

 

as long as your run 93...tuning is key

 

Simple answer: With proper tuning, you will be fine. Just make sure you choose an experienced and very reputable tuner. If you are on the east cost, Jeff Evans @ Evans Tuning and Jack @ P1 Auto are two of the best out there.

 

Both are right. The only for sure way to know. Is to find the tuner that's local to you or the one that you'll be using after your motor build and go talk with him. He'll let you know if he feels comfortable tuning at that compression or not. You also get a feel for if what he's saying is the truth about his experience/skill level or if he's lying.

Is it possible?, very much so. Can all tuners, tune as well as another. I'm afraid not.

 

where i am.. i get more 94 oct.. so 94 > 93 .. should be safer too

RM told me set the timing @ 17

does anybody know any good place to tune in MI area?

 

2385 South 179th Street, Suite C New Berlin, WI 53146
http://www.kingmotorsports.com/

 

I run ctr pistons in my itr motor with skunk pro-1's, using only 93 octane and I did all the tuning myself. Like everyone else said, 93/94 octane and a good tuner are required. Although if I were to do it over again I would go with a set of lighter pistons and shoot for 11.5~12.0 c/r. It allows more flexibility and will produce the same or more power.

 

Dude, down in Puerto Rico everyone and their grandmother runs CTR pistons on 93 octane. I know a few guys running 2-ply head gaskets with the CTR pistons with 93oct on daily drivers. I say go for it.. I'll probably do it myself as soon as I get my budget back under control

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by bitzbp &raquo;</TD></TR><TR><TD CLASS="quote">I run ctr pistons in my itr motor with skunk pro-1's, using only 93 octane and I did all the tuning myself. Like everyone else said, 93/94 octane and a good tuner are required. Although if I were to do it over again I would go with a set of lighter pistons and shoot for 11.5~12.0 c/r. It allows more flexibility and will produce the same or more power.</TD></TR></TABLE>

did u have chance to have your car dyno'd? if u did.. do u mind letting me know the whp u got?
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by iperez &raquo;</TD></TR><TR><TD CLASS="quote">Dude, down in Puerto Rico everyone and their grandmother runs CTR pistons on 93 octane. I know a few guys running 2-ply head gaskets with the CTR pistons with 93oct on daily drivers. I say go for it.. I'll probably do it myself as soon as I get my budget back under control </TD></TR></TABLE>

yeah. i should go for it.. cant wait till it's done.

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Bbasso &raquo;</TD></TR><TR><TD CLASS="quote">2385 South 179th Street, Suite C New Berlin, WI 53146
http://www.kingmotorsports.com/ </TD></TR></TABLE>

WI eh?.. that seems freaking far from here ..
but yeah. thanks

 

How high compression will you get with CTR pistons?

Are they 81mm or 81.5mm?

 

About 12.6- 12.7:1 if all else is OEM. You get them in 81mm and 81.25mm.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by itr1244 &raquo;</TD></TR><TR><TD CLASS="quote">
so what's the real answer.? </TD></TR></TABLE>

Yes. Provided you have a ready supply of the fuel on which the motor was tuned and provided the tuner knows to back away from those last couple of horses by not leaning it out dangerously at high RPM.

I wouldn't shave the head if I were you.

 

What year CTR pistons are we talking? -01 or 02-05?

 

Obviously, for them to fit in a B18C block, we are talking about pistons from a B16B, found in the EK CTR.

 

how bout ctr pistons on 91 octane, here in cali i dont see 93

 

I have been running them for 2 years now, properly tuned and keeping 93 octane (why would you go lower anyway?) its fine. I don't even think about the R having anythign done to it when daily driving....

 

Use B16 pistons.

Lighter, and better flame travel. You don't need high compression to make power.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Pondus &raquo;</TD></TR><TR><TD CLASS="quote">About 12.6- 12.7:1 if all else is OEM. You get them in 81mm and 81.25mm.</TD></TR></TABLE>

yup. 81.25 is what i got

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Pondus &raquo;</TD></TR><TR><TD CLASS="quote">Obviously, for them to fit in a B18C block, we are talking about pistons from a B16B, found in the EK CTR.</TD></TR></TABLE>
exactly. lol
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by eikki &raquo;</TD></TR><TR><TD CLASS="quote">What year CTR pistons are we talking? -01 or 02-05?</TD></TR></TABLE>
it would be funny as hell if i can make K series pistons fit B's
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by George Knighton &raquo;</TD></TR><TR><TD CLASS="quote">Yes. Provided you have a ready supply of the fuel on which the motor was tuned and provided the tuner knows to back away from those last couple of horses by not leaning it out dangerously at high RPM.

I wouldn't shave the head if I were you.</TD></TR></TABLE>

yeah. i dont wanna have any higher C.R.. no way i'm shaving it off. heh
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by totsie7944 &raquo;</TD></TR><TR><TD CLASS="quote">I have been running them for 2 years now, properly tuned and keeping 93 octane (why would you go lower anyway?) its fine. I don't even think about the R having anythign done to it when daily driving....</TD></TR></TABLE>
then. when do u notice that u have CTR pistons ? punching it?

wonder how high comp motor feels like.
12.0 12.5 is too high? sound real good to me lol

 

what kind of compression will you get from using b16 pistons in an itr block?

 

I meant B16A pistons.

mid 11's for the street is perfect

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by itr1244 &raquo;</TD></TR><TR><TD CLASS="quote">
then. when do u notice that u have CTR pistons ? punching it?
</TD></TR></TABLE>


Yea you notice it when you punch it man, alot more responsive gas pedal and little lag time on acceleration. I mean my R has plenty of power and its loud and I can make it sputter if I play around with the gas pedal some, but thats all me.

Like I said, I daily drive the car. Its perfectly fine for even long trips if you can handle the noise assumign you have exhaust. My mods consist of CTR pistons, toda spec C cams, Toda valve train, Ti retainers, injectors etc etc etc and I love driving the R.

I could drive my buddy almost stock GSR or my heavily modified R every day and barely tell a difference unless I get on it really hard. Just get some proper tuning man.

 

so b16a pistons come out to 11.5 compression? looks like a good upgrade from my jdm itr's

 

My old ITR with CTR's made 192 hp on stock cams and 93 octane. In the summer I ran 110 octane until I had it tuned on Hondata. I later sold it to friend who a few months later traded it in at a dealership (bone stock except for CTR pistons). The car was sold to a local who drives the car daily on pump gas and on a stock ECU, and it hasn't blown up.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Rdriver &raquo;</TD></TR><TR><TD CLASS="quote">My old ITR with CTR's made 192 hp on stock cams and 93 octane. In the summer I ran 110 octane until I had it tuned on Hondata. I later sold it to friend who a few months later traded it in at a dealership (bone stock except for CTR pistons). The car was sold to a local who drives the car daily on pump gas and on a stock ECU, and it hasn't blown up. </TD></TR></TABLE>

all stock other than CTR pistons and it made 192? that's pretty impressive.
anyguess what my set up would have?
with 310cc injectors + cams + tune 210+ hopefully...

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by totsie7944 &raquo;</TD></TR><TR><TD CLASS="quote">Yea you notice it when you punch it man, alot more responsive gas pedal and little lag time on acceleration. I mean my R has plenty of power and its loud and I can make it sputter if I play around with the gas pedal some, but thats all me.

Like I said, I daily drive the car. Its perfectly fine for even long trips if you can handle the noise assumign you have exhaust. My mods consist of CTR pistons, toda spec C cams, Toda valve train, Ti retainers, injectors etc etc etc and I love driving the R.

I could drive my buddy almost stock GSR or my heavily modified R every day and barely tell a difference unless I get on it really hard. Just get some proper tuning man.</TD></TR></TABLE>

any dyno numbers you have there?
sounds like a sick set up

 

When my R was tuned it had RC 310's, JDM 4-1 header, T1R test pipe, Mugen cat back, comptech Ice box and Hondata s200. With the right cams it would have made 200+.