how do you like it? my buddy wants to put some ctr pistons in his 98 itr, but its pretty damn hot in the summer out here (120 F) and he uses the car everyday...how reliable do you think the car will be?..what do you think he should do....piston wise.....

thanks
ceas

HAPPY NEW YEAR

 

im not entirely sure but dont ctr pistons drop your compresson?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by carbing’ed &raquo;</TD></TR><TR><TD CLASS="quote">im not entirely sure but dont ctr pistons drop your compresson? </TD></TR></TABLE>

I know ctr cams raise it... dont know about the ctr pistons though

 

yes, they will raise it, to about 12.8:1


if you have enough fuel, it will work.

 

I run ctr pistons...compression should be around 12.5

It makes good power

120F sounds pretty hot though...where I live, we never go above 100...also we get 94 octane gas...and to be safe, I got it tuned with hondata

so I think your friend definitely needs a good tuning device...also, he should consider getting something with a less compression.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Bay_707 &raquo;</TD></TR><TR><TD CLASS="quote">

I know ctr cams raise it... dont know about the ctr pistons though</TD></TR></TABLE>

uhm. cams raise compression? I'll be damned.

 

What? How does a cam raise compression?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by carbing’ed &raquo;</TD></TR><TR><TD CLASS="quote">im not entirely sure but dont ctr pistons drop your compresson? </TD></TR></TABLE>

Nope, they raise compression.

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Bay_707 &raquo;</TD></TR><TR><TD CLASS="quote">I know ctr cams raise it... dont know about the ctr pistons though</TD></TR></TABLE>

CTR cams do not raise compression.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by ceasar of mgineering &raquo;</TD></TR><TR><TD CLASS="quote">...out here (120 F) and he uses the car everyday....</TD></TR></TABLE>

Think about using B16 (160 HP) pistons instead of B16 CTR (180 HP) pistons. The B16 pistons will raise compression a little, decent amount without compromising the motor's longevity and without making fuel delivery and tuning an issue.

 

wow i was thinkking about putting ctr pistons in becaus my rings are going bad,,12.5 comp plus a mugen headgasket=???

i better hope my rings hold out until i can buy new cams and a timing belt so i can do everything at once

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by itr#xxxxlives &raquo;</TD></TR><TR><TD CLASS="quote">12.5 comp plus a mugen headgasket=???</TD></TR></TABLE>

= better have readily available high-octane fuel and good tuning

 

well i run 92 octane and i am also close to one of the best aem fuel managment system tuners in the country

but paying the for 1000 dollar aem setup is another 100+ hours of work

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by itr#xxxxlives &raquo;</TD></TR><TR><TD CLASS="quote">well i run 92 octane and i am also close to one of the best aem fuel managment system tuners in the country

but paying the for 1000 dollar aem setup is another 100+ hours of work </TD></TR></TABLE>

you are better of with itr JDM pistons to be neart 11.1CR , you can add the mugen or spoon head gasket to raise it abit more and as long as you have a good tuner you dont have to worry about running 100 octane all the time

 

well why not just buy forged internals with maybe 11.5 pistons? im looking for the max comp i can run at 92 octane gas, i already have a hefty list down so a couple hundred extra dollars wont be too much...

 

I'm runnin a poor mans ITR (B18C/B16A) in my GSR with only a few problems. The only ones i could see transfering to this application is the heat. I did not have it finished for the hot part of the summer, so it saw about 75-80 degrees. The car tends to heat up well, and manage heat well when moving. When it sits, it gets hot quick(10 min of sitting still at operating temps, gotta turn car off). But I'm running the head with full ITR internals and cams, with a hondata tune, came to 188.6 at the wheels. Should be good for your friend. just watch the heat.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by itr#xxxxlives &raquo;</TD></TR><TR><TD CLASS="quote">well why not just buy forged internals with maybe 11.5 pistons? im looking for the max comp i can run at 92 octane gas....</TD></TR></TABLE>

If the "best AEM tuner" you talked about is the one I'm thinking about (British Columbia, right?) then I think he is going to disagree with your approach and if you're sure you're going AEM you should talk to him before you spend the money.

The problem I'm having is that the tuner is going to know you can run almost whatever compression you want for 92 octane (even 13.5:1) but you're always going to have to dumb it down with the tuning to get it to run without damage.

It seems to me you'd be better off going with a more reasonable compression ratio to start with, and then allowing a fuel map and spark curve that will give you a better-driving car, overall.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by BDBGoalie1982 &raquo;</TD></TR><TR><TD CLASS="quote">I'm runnin a poor mans ITR (B18C/B16A) in ....I'm running the head with full ITR internals....</TD></TR></TABLE>

I'm not sure (forgive me) why this is relevant for the poster. Are you using USDM B18C5 pistons, B16 160 HP pistons, B16 180 HP pistons, or USDM B18C1 pistons?

 

dumb fugg..

Cams has nothing to do with compression.

if you mill your head or use thin head gasket .. it also raises compression.

or use taller pistons... so ctr piston over itr piston WILL raise compression..

just like what Reid said

 

acutally cams CAN effect dynamic compression

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Dan GSR &raquo;</TD></TR><TR><TD CLASS="quote">acutally cams CAN effect dynamic compression</TD></TR></TABLE>

Yes cams will affect dynamic compression but not static compression which i believe is what is beeing discussed here.

 

i dont wanna search and it'd be a good time to explain it, i know static compression, but what is dynamic? i know the bigger the cam the lower the compression

 

technical posts in the ITR forum always go down the drain

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by EkNineSpooner &raquo;</TD></TR><TR><TD CLASS="quote">i dont wanna search and it'd be a good time to explain it, i know static compression, but what is dynamic? i know the bigger the cam the lower the compression </TD></TR></TABLE>

A little help for the ones to lazy to search for themselves :

https://honda-tech.com/zerothread?id=700677
https://honda-tech.com/zerothread?id=680078
https://honda-tech.com/zerothread?id=395542

There's more to be found in the archives for those who are interested.

 

Dudes, here in Puerto Rico, people drop CTR pistons on B18C5's all the time. I know of a few guys running these pistons with 93octane and daily-driving the cars in summer temperatures which come very close to 100degs ... Good compression/power adder and seems to work just fine.

 

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

If the "best AEM tuner" you talked about is the one I'm thinking about (British Columbia, right?) </TD></TR></TABLE>

I would like to know who this tuner is. PM me if you wish.