CTR, or ITR pistons? - Honda-Acura.net

CivOnDubs · 01-04-03, 09:14 PM

I have a jdm b18c gsr motor, and I have low compression (120 psi) in the #3 cylinder....I was planning on just upgrading my pistons along with the rings since I have to take them out anyway.

My question is should I get the CTR pistons or the ITR pistons, I want an all motor setup with higher compression. I heard that the CTR pistons have higher compression, but I want to make sure I don't have to any specialty work since I am using different pistons.....Any advice is appreciated.

Registered and logged-in users don't see this ad!
Register your free account today.

dubcac · 01-04-03, 10:51 PM

I would go with JDM ITR pistons.

**qtiger** · 01-05-03, 01:56 AM

CTR pistons will give you a much higher compression, and you won't have to alter them at all to get them to fit.

Just have to decide if you want 11.3:1 or 12.3:1 compression. Beware of 91 octane if you get CTR pistons.

CivOnDubs · 01-05-03, 11:55 AM

Some people were giving me smack cuz I said I wanted all motor and I am a fool for going with a thinner headgasket and higher compression pistons...

With the thinner headgasket and higher compression CTR pistons......I won't have a timing problem, with the crank and the timing of the valves since the gaps will be different?

dubcac · 01-05-03, 02:34 PM

With a thin headgasktet AND CTR pistons, good luck making it streetable, unless you can get high octane pump gas. Also, with a milled GSR head and CTR pistons you can have piston to valve contact, so I don't know if a thin headgasket is such a good idea.

CivOnDubs · 01-05-03, 04:05 PM

Yea, We ran a another compression test after the motor was warmed up...and we got 150 -140 psi this time. Which makes me believe it is something else because the pressure is holding too.

I think I am going to skip the pistons, and JUST replace the headgasket. Any issues with doing this, or any tuning I would need to do ?

Thanks alot.

dubcac · 01-05-03, 05:12 PM

Well yeah when the motor is warm, things expand and seal better, so you're gonna have better compression #'s. That still is low for the motor you have, it should be in the low 200's.

01-04-03, 10:51 PM	#2
dubcac I WANT WINNERS Join Date: Jan 2001 Location: The W Posts: 52,938	I would go with JDM ITR pistons. __________________ Brett.2003.NFR.AP1.Apexi.ATE.Bilstein.Mugen.Work Team B.O.B.® - Ballaz on a Budget "Hip hop is so wack, the beats are fighting back And I was sent to attack, so I'm following the map"

01-05-03, 02:34 PM	#5
dubcac I WANT WINNERS Join Date: Jan 2001 Location: The W Posts: 52,938	With a thin headgasktet AND CTR pistons, good luck making it streetable, unless you can get high octane pump gas. Also, with a milled GSR head and CTR pistons you can have piston to valve contact, so I don't know if a thin headgasket is such a good idea. __________________ Brett.2003.NFR.AP1.Apexi.ATE.Bilstein.Mugen.Work Team B.O.B.® - Ballaz on a Budget "Hip hop is so wack, the beats are fighting back And I was sent to attack, so I'm following the map"

01-05-03, 05:12 PM	#7
dubcac I WANT WINNERS Join Date: Jan 2001 Location: The W Posts: 52,938	Well yeah when the motor is warm, things expand and seal better, so you're gonna have better compression #'s. That still is low for the motor you have, it should be in the low 200's. __________________ Brett.2003.NFR.AP1.Apexi.ATE.Bilstein.Mugen.Work Team B.O.B.® - Ballaz on a Budget "Hip hop is so wack, the beats are fighting back And I was sent to attack, so I'm following the map"

Thread Tools
Show Printable Version Email this Page
Display Modes
Linear Mode Switch to Hybrid Mode Switch to Threaded Mode

01-05-03, 01:56 AM	#3
qtiger Meow? Join Date: Jun 2001 Location: Ann Arbor, MI Posts: 11,748	CTR pistons will give you a much higher compression, and you won't have to alter them at all to get them to fit. Just have to decide if you want 11.3:1 or 12.3:1 compression. Beware of 91 octane if you get CTR pistons.

01-05-03, 11:55 AM	#4
CivOnDubs Senior Member Join Date: May 2002 Location: Chicago Posts: 226	Some people were giving me smack cuz I said I wanted all motor and I am a fool for going with a thinner headgasket and higher compression pistons... With the thinner headgasket and higher compression CTR pistons......I won't have a timing problem, with the crank and the timing of the valves since the gaps will be different?

01-05-03, 04:05 PM	#6
CivOnDubs Senior Member Join Date: May 2002 Location: Chicago Posts: 226	Yea, We ran a another compression test after the motor was warmed up...and we got 150 -140 psi this time. Which makes me believe it is something else because the pressure is holding too. I think I am going to skip the pistons, and JUST replace the headgasket. Any issues with doing this, or any tuning I would need to do ? Thanks alot.