Besides:

CTR: 1.6L, 10.8CR, 9000 redline, 185Hp 117 Trq 10.8 Compression(JDM)
ITR: 1.8L, 11.1CR, 8700 redline, 200Hp 134Trq 11.1 Compression(JDM)

Other than the power difference between the two, are the blocks built different internally? Obvioulsy the pistons are different to make the different compression ratio's, but are the CTR and JDM ITR rods the same along with all the other internal parts? I'm curious to whether the JDM ITR couldn't redline to 9000rpms safely if the CTR can its factory 9K redline?

 

CTR Block is basically a destroked ITR Block.

 

It's pretty common to see bone stock ITR blocks (usdm and JDM) revving to 9100 (w/ the Mugen Ecu or something similar). If you don't have a good header, intake, and exhaust, you won't make any power up there though... The CTR motor needs to rev that high to make any power (1.6 liters = nooo torque at all).

So I think the answer is yes, ITR blocks can rev that high. I don't know about any actual differences between blocks however (might want to do a search).

 

the 1.6 block is about .2 shorter in height than the 1.8 if I am correct.

 

gonna blow some more motors soon Eric?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by erics99si &raquo;</TD></TR><TR><TD CLASS="quote">Besides:

CTR: 1.6L, 10.8CR, 9000 redline, 185Hp 117 Trq 10.8 Compression(JDM)
ITR: 1.8L, 11.1CR, 8700 redline, 200Hp 134Trq 11.1 Compression(JDM)

Other than the power difference between the two, are the blocks built different internally? Obvioulsy the pistons are different to make the different compression ratio's, but are the CTR and JDM ITR rods the same along with all the other internal parts? I'm curious to whether the JDM ITR couldn't redline to 9000rpms safely if the CTR can its factory 9K redline? </TD></TR></TABLE>

Different cranks and pistons, TB but a CTR with an ITR crank is a pretty nice combo......better pistons and a little more power than an ITR motor.....

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by RealTypeR2 &raquo;</TD></TR><TR><TD CLASS="quote">the 1.6 block is about .2 shorter in height than the 1.8 if I am correct.</TD></TR></TABLE>

Block height is the same. Shorter stroke. The B16B is NOT a B16a block.

 

ctr doesn't have a 9k redline.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 92TypeR &raquo;</TD></TR><TR><TD CLASS="quote">

Block height is the same. Shorter stroke. The B16B is NOT a B16a block.</TD></TR></TABLE>

Correct..Vthokie learned that the hard way when he was sent a b16b timing belt for his b16a and it did not fit.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by jonas &raquo;</TD></TR><TR><TD CLASS="quote">ctr doesn't have a 9k redline.</TD></TR></TABLE>

That's what I thought. My videos show it having a 8,400rpm redline as well. Not that it really matters.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by jonas &raquo;</TD></TR><TR><TD CLASS="quote">ctr doesn't have a 9k redline.</TD></TR></TABLE>

And the JDM ITR doesn't have an 8700 redline either (or 200 hp either, for that matter).

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by RealTypeR &raquo;</TD></TR><TR><TD CLASS="quote">gonna blow some more motors soon Eric? </TD></TR></TABLE>

hey what can I say... I like to drive hard... I've heard the ITR performs well when your smackin its *** daily.. lol Just plan on upgrading the head components and cams for next season and seeing what the improvements are. My goal is 12.99 with only head upgrades done. best so far is 13.7 bone stock, looking to shave 7 tenths somehow without going boost. How's your car running these days? Any new additions? Talk to you later!

 

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

ctr doesn't have a 9k redline. </TD></TR></TABLE>

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

And the JDM ITR doesn't have an 8700 redline either (or 200 hp either, for that matter). </TD></TR></TABLE>

I must be blind looking at the tach then when my buddy as a factory PCT CTR ecu and his car bounces revs at 9000 on his tach and my car bounces at 8700 with the P73 ITR ECU...hmmm Obvioulsy this bouncing is the fuel cut mark though it shows 8700 on my car and 9K on my buddies.

Here's a site that shows the redline's as well (dunno how reliable it is, yet I've posted several other sites that state the same below *shrug*):
B16B: http://www.osakajdmmotors.com/....html
B18C-R: http://www.osakajdmmotors.com/....html (they show 8900 actually on this link)

Here's some others as well:
http://www.allbodykits.com/JDM_Engines.htm
http://www.imoto.com/shopsite_....html
http://hybrid2.honda-perf.org/tech/engine.html
http://tech.hybridgarage.com/tech/specs.htm
http://www.4thgenerationcivic....1.htm
http://members.***.net/revlimit/engineinfo.html
http://www.drkside.com/perf_especs.htm


Modified by erics99si at 9:22 PM 9/25/2003

 

The red lines are pretty easy to distinguish as 8400 RPM in both photos (CTR and ITR). Stock tachs are notoriously inaccurate and optimistic in the upper RPM ranges. Also keep in mind that redline and fuel cut two seperate things.

Photos borrowed from http://www.j-garage.com.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by erics99si &raquo;</TD></TR><TR><TD CLASS="quote">Here's a site that shows the redline's as well (dunno how reliable it is, yet I've posted several other sites that state the same below *shrug*):
B16B: http://www.osakajdmmotors.com/....html
B18C-R: http://www.osakajdmmotors.com/....html (they show 8900 actually on this link)
</TD></TR></TABLE>
Factory figures:
CTR: 185PS (182HP) / 8,200
JDM ITR: 200PS (197HP) / 8,000rpm

CTR fuel cut ??
ITR fuel cut 8500-8600rpm


All the info you want from the horses mouth, just use altavista bablefish to translate to english:
http://www.honda.co.jp/HOT/ModelData/

The Rev counter means nothing, they are inaccurate, mine hits the 9500rpm marker before I change and my rev limit is set to 9200rpm.

 

I run a CTR ecu and my fuel cut varies (VAFC) but for the most part 8600 with a few 8700 ish trips every once in a while

I dont think it will rev to 9K and I would probably change the valvesprings if I was going to be revving that high .....so from my personal CTR ecu experince it DOES NOT rev to 9K

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by erics99si &raquo;</TD></TR><TR><TD CLASS="quote">
I must be blind looking at the tach then when my buddy as a factory PCT CTR ecu and his car bounces revs at 9000 on his tach and my car bounces at 8700 with the P73 ITR ECU...hmmm Obvioulsy this bouncing is the fuel cut mark though it shows 8700 on my car and 9K on my buddies.</TD></TR></TABLE>
not blind, just gulable. what shows on your tach is not accurate.


<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote &raquo;</TD></TR><TR><TD CLASS="quote">Here's a site that shows the redline's as well (dunno how reliable it is, yet I've posted several other sites that state the same below *shrug*):
B16B: http://www.osakajdmmotors.com/....html
B18C-R: http://www.osakajdmmotors.com/....html (they show 8900 actually on this link)

Here's some others as well:
http://www.allbodykits.com/JDM_Engines.htm
http://www.imoto.com/shopsite_....html
http://hybrid2.honda-perf.org/tech/engine.html
http://tech.hybridgarage.com/tech/specs.htm
http://www.4thgenerationcivic....1.htm
http://members.***.net/revlimit/engineinfo.html
http://www.drkside.com/perf_especs.htm</TD></TR></TABLE>
osaka.. lol. believe honda, not companies that re-sell honda parts.


Modified by erics99si at 9:22 PM 9/25/2003[/QUOTE]

 

I've never heard of the actual engine revvs hit 9k on a CTR. I know my tach is very inacurate...it shows 9k, maybe even 9100 and I have a stock car (ITR). A digital tach with a peak hold will show you how high the actual engine revvs reach.

Also, I would not think that Honda would let the valvetrain go to 9k because there are reliability factors with valvefloat at that high.

 

Yup.....let me guess that you are running off your stock tach. Even if you had the ctr tach and ecu....the revs would be higher on the tach than your motor is actually going at. Plug in a vafc and you will get your real rev limit.

 

My friends tach must be about 300 rpms off then when its showing 9000... I shift my car at 8500 and by the time I actually get into the next gear the tachs reading 8700ish...

 

tach's can be off by a lot more than that.

 

Yeah when my tach reads close to 9k, the vafc only is reading like 8600-8700. The stock tachs are off, this is old news.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by jonas &raquo;</TD></TR><TR><TD CLASS="quote">tach's can be off by a lot more than that.</TD></TR></TABLE>

Its a percentage, not a definate number from what I understand. It will be further off at 5000 rpms than it is at idle...etc.

 

correct

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by vtecvoodoo &raquo;</TD></TR><TR><TD CLASS="quote">CTR Block is basically a destroked ITR Block.</TD></TR></TABLE>

Intresting fact. I didnt know it was destroked ITR Block.