CTR pistons in a type R

What compression will they yeild?


Let me know I'm interested in putting them in.

I heard 12:1

 

you will be at least 12.1 you need to also factor in if the pistons are oversized, is the head milled? and what kinda head gasket you will be using, but garuntee it will be 12 something to 1.

 

i believe ctr pistons already comes in a type-r, the 'tr' in ctr means type-r. the book says its 10.8:1

 

no no...

CTR = Civic Type R

These pistons come in the Civic Type R in Japan

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by allmtr y0! &raquo;</TD></TR><TR><TD CLASS="quote">i believe ctr pistons already comes in a type-r, the 'tr' in ctr means type-r. the book says its 10.8:1</TD></TR></TABLE>


plese dont spread information that u :"think" is right. that only fills the fourm with more confusing onformation for new people. if you knew anyhting about honda motors the ctr and the itr are 2 very different animals..

 

12 days later... Been doing some searching

and for the CTR pistons to fit, the ITR head needs to be milled correct??
and would it be better to use the CTR cams or will the ITR cams bring just as much power?
one last thing... will an oem factory gasket work, or is there a beter one that i could use?
Thanks

 

11.75 to 1 or 12 to 1

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by EGRhatch &raquo;</TD></TR><TR><TD CLASS="quote">12 days later... Been doing some searching
and for the CTR pistons to fit, the ITR head needs to be milled correct??
and would it be better to use the CTR cams or will the ITR cams bring just as much power?
one last thing... will an oem factory gasket work, or is there a beter one that i could use?
Thanks </TD></TR></TABLE>

ITR does not need to be milled for CTR pistons to fit.
CTR and ITR exh cams are the same. the CTR intake cam has 3 degress more duration than ITR. power netted is neglible.
OE head gasket will be fine.

 

im all most postitve that ctr pistons will bring a itr motor to 12.5:1.....cuz thats what it brings a gsr block to so im assuming its the same..and no,,,ctr pistons dont come in itr's...if they did they wont be called ctr pistons theyll be called itr....right?

 

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


plese dont spread information that u :"think" is right. that only fills the fourm with more confusing onformation for new people. if you knew anyhting about honda motors the ctr and the itr are 2 very different animals..</TD></TR></TABLE>
hahaha. u mean theres a Ctr <U> AND </U> an Itr???

 

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

ITR does not need to be milled for CTR pistons to fit.
OE head gasket will be fine.</TD></TR></TABLE>

Even if i get the overbored pistons??

sorry im just confused by the many different answers from threads on this topic.

 

Well the GSR head yields higher compression then ITR so with an ITR head it will be slightly lower.

Has anyone proven yet that's 81.00mm CTR pistons will not yield 11.75:1 compression in a stock ITR motor? I have heard just about every number in the world thrown around.

 

The compression is not 12:1 for sure, its going to be a little under. To get 12:1 comp you need run a gsr head on itr or gsr block.. Assuming oem HG and deck surfaces

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by dwn-shift &raquo;</TD></TR><TR><TD CLASS="quote">The compression is not 12:1 for sure, its going to be a little under. To get 12:1 comp you need run a gsr head on itr or gsr block.. Assuming oem HG and deck surfaces</TD></TR></TABLE>
yup yup. i had a milled b16 head on my gsr block with ctr pistons and the CR was roughly 12.3:1

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by allmtr y0! &raquo;</TD></TR><TR><TD CLASS="quote">
hahaha. u mean theres a Ctr <U> AND </U> an Itr??? </TD></TR></TABLE>

You seemed surprised?

 

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

You seemed surprised?</TD></TR></TABLE>
well nobody told me. why am i always left out. what else are u guys keeping from me??

next youll be telling me theres and ATR in japan.. (accord)... psshht. ya right

.. or even making stuff up like there's a euro R... paahleezz

 

your right it's going to be near 12:1

 

i was looking at the aj-racing site, and for their stroker kit for the b16b, it says that the b16b and b18c5 blocks are identical...and further on they say that u can use that b16b stroker kit to rebuild a worn down b18c5 motor...
...because of this, it will yeild the compression ratio of a ctr motor if you put them in a c5 block. please correct me if im wrong. thanks

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by kidkombo &raquo;</TD></TR><TR><TD CLASS="quote">i was looking at the aj-racing site, and for their stroker kit for the b16b, it says that the b16b and b18c5 blocks are identical...and further on they say that u can use that b16b stroker kit to rebuild a worn down b18c5 motor...
...because of this, it will yeild the compression ratio of a ctr motor if you put them in a c5 block. please correct me if im wrong. thanks</TD></TR></TABLE>
you are so right. those blocks have the exact same deck height

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by allmtr y0! &raquo;</TD></TR><TR><TD CLASS="quote">
well nobody told me. why am i always left out. what else are u guys keeping from me??

next youll be telling me theres and ATR in japan.. (accord)... psshht. ya right

.. or even making stuff up like there's a euro R... paahleezz </TD></TR></TABLE>

huh, i coulda swore the accord R only came out in europe...gah, only reason i think that is probly because the only one ive ever seen was in a europian magazine...hehe

 

so much misinformation, its scary,b18c is around 12.1 with b16head, gsr head is around like 12.5

 

I'm running Oversized CTR pistons in my ITR.

Stock Headgasket. Stock Head. It runs on pump gas all day long.

 

b18c5 block -b18c5 head-oem gasket- ctr's : 11.75
b18c5 block -b18c5 head-oem gasket- usdm itr's : 10.6
b18c5 block -b18c5 head-oem gasket- jdm its's : 11.1
b18c5 block -b18c head-oem gasket - ctr's : 12.04

I'm pretty sure these are correct !
I any one wants to kow what a different combo would yeild lemmie konw!!

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by TwoRedEGgs &raquo;</TD></TR><TR><TD CLASS="quote">b18c5 block -b18c5 head-oem gasket- ctr's : 11.75
b18c5 block -b18c5 head-oem gasket- usdm itr's : 10.6
b18c5 block -b18c5 head-oem gasket- jdm its's : 11.1
b18c5 block -b18c head-oem gasket - ctr's : 12.04

I'm pretty sure these are correct !
I any one wants to kow what a different combo would yeild lemmie konw!!</TD></TR></TABLE>

looks like your just grabbing numbers from cspeedracing and once again the pct piston in a b18c block is the wrong compression on their site

 

I got these #'s a while back, I dont know where my bro got them from but he could have got them from cspeedracing!

even if he did, they are still extremely close to what u will actaully get !!