Why are you able to rev a JDM b18c Type R to 8900 and the USDM b18c5 only to 8400? Is this a ecu issue? Thats all I can think of. Also do the JDM ITR cams flow more air? I am just wondering.

 

how do you know redline is higher besides reffering to tachometer which is not always accurate?

 

1) same redline

2) cams never flow air. intakes do.

3) why not search?

 

You can rev the b18c5 and b18c-r as high as you want. Just as sgT.

The difference is the ecu. But if the power curve is falling off at 8000 or so anyways.... no real need to rev it all the way up to 8900 with stock internals.

 

You can rev the USDM to 8,600rpms. Like everyone said the stock cams don't make power up that high so it's pointless.

 

ok so i am stupid, I am just asking basicly why does Honda say the JDM's redline is 8900 and USDM is 8400 if there is no difference. Also about the cams I was asking is there more lift or duration on the JDM cams. Why do people always wanty to buy the JDM ITR cams than the USDM there has to be a reason. Is it price, what?

 

Ok to set everyone stight I just am asking whats the difference. I don't want to rev to 9000K.

 

again, here is your answer.

 

JDM b18c has higher compression pistons (11.1:1?). As far as I know, the JDM b18c has the same cams as the '00-'01 ITR/CTR cams.

I'd suspect the higher redline is due to the pistons, but I don't know for sure.

 

wow, jdm ITR reving to 8900 is news to me

 

Soup **** you are not alot of help. Thanks Chris.

 

Where did you get this information? You said honda, where on their website or what?

 

Why have you never seen a JDM ITR rev to 8900?

 

Its not on the wen site. i saw it reading up on info for the engine. I will try to find it again. Also thats why I am asking i am seeing waht the ITR pros think.

 

You replied to my post, but I never quoted Honda.

Ask those that have a JDM ITR ecu. It has a higher redline. I thought that was common knowledge.

Soup **** is great help! You just have to ask him the right way.

 

I am sorry I did not mean to say you quoted honda. I was saying to soup **** that he is not helping me out very much. I just want to know to increase my info. No hate to anyone I am trying to learn.


[Modified by spoonfed95, 4:40 AM 3/27/2003]

 

higher redline would have to do with valve components i'd think.. pistons just raise the compression.

 

Redline on the JDM ITR is the same as USDM - 8400 RPM. Why Honda would choose to set the JDM car's limiter higher than the US version, I don't know, but this is the first I have heard of the JDM car having a higher limiter (although it is quite possible).

 

No, you are the problem here. You even admitted it:

What Soup **** posted is the correct information.

 

Well the standard rev limit on the PowerFC is 8500rpm, I don't think the programmed rpm limit on the JDM ITR will be higher than this as the PowerFC is predominately designed for the JDM market (well mine certainly is as a bought mine direct from Japan).

Don't trust the tach IMO.

 

mine revs to 10k rpm!!! no big deal.

 

LOL !

1st) JDM cutoff ist 8400rpm.. NOT 8900rpm. It`s software controlled.

2nd) cams differences depend on the year of appearance

3rd) You can raise the redline to 9000 with stock internals to have a wider powerband while track racing...Just like some aftermarket ECU`s work. Dealing with a slightly dropping torque curve after 8200rpm sometimes is better than to be forced to shift..

Follow soup ****`s advice. That`s all


PS:
look at my sig: JDM b18c engine..




[Modified by ITR1858, 11:15 AM 3/27/2003]

 

lol. i answer your dinky question, yet no help.

you are great

 

this actually isnt completely true.

a reason i'd want to rev higher than where i'd make "power" would be to shift into vtec the next gear available...where my power band would lie.

 

It's the JDM pistons that people desire, 11:1 . Read what everyone else said about rev-limit.