I heard the 98+ JDM ECU's rev limiter is 9k and USDM is 8.4k, and since OBDII suppose to be able to learn new fuel curves, timing, etc, would it be possible to run a JDM ECU with CA's 91 octane and let it learn from idling for 30minutes? Or is that just wishfull thinking?

 

i also hear that vtech owns all nokias.

 

Ok...
1, the USDM rev limit is at 8600, redline is 8400.

2, the JDM ECU would suck on cali's 91 octane, it's tuned for higher octane fuel, i believe it's around 96-98 octane by us standards. don't waste your time.

 

i am using a jdm ecu, so far so good........

 

no doubt its tuned for high octane which I already noted, but I was just implying the possibility for OBD II to learn.

 

It won't work, katman tried it, lost something like 8whp throughout the entire powerband.

 

what setup are you running?

 

Ya what are you using because I am under the assumption that jdm ecu's don't work on us cars because they are made for right hand drive cars and the connections are backwards or upside down or something? What gives?

 

n00b. they work fine, just might not perform as well due to the different fuel/timing maps.

 

ecu's arent specifically made for RHD/LHD configuration, i think you are talking about the wiring harness.

 

So to answer my question, even though it is OBDII, it won't be able to readjust the timing and fuel curve on its own?

 

obdII plugs, obdI programming.

 

he is right, obd2 plug obd 1 program.
and i am just running a stock jdm b18c spec r, the ecu does what it should do.
as far as performance wise, its not bad, i just ran with my friend itr today in highway 2 today, not much difference. he got header, stirght pipe, i got lighten flywheel, stock jdm itr exhaust system(whole thing).

 

i ran a 96 jdm ITR ECU on my stock R w/ 91 octane gas and it ran fine.

 

I have a 96 spec jdm type r motor in my car ( currently running gsr ecu), I do have a jdm type r Ecu, my question was for those who are using this ECU. Do you have any problems reading your speed, or did you have to buy a new speedometer to read it in KM ?

 

as far as speed signal, don't worry, ecu doesnt see mph or kph, it just see pulse.

 

A simple piggy back speedometer will fix the ECU spped limiter switch...as far as the differences...Timing and fuel is a bit difference....personally, I'd stick with the USDM, ...it won't make a significant difference!

 

http://www.itrca.com/FAQ/techspecs/specs.php

Taken from the Integra brochure fuel cutoff is 8500 rpms

 

I ran a 98 JDM ITR ecu on 93octane and it was real good. I did a back to back comparrison on the dyno between the USDM and JDM and the JDM gave me 5-7hp across the entire board with no other mods.
If you can live with a speed limiter then its a good ecu to have in my opinion.

scott
98 ITR turbo

 

Fuel cutoff on ALL DC2 ITRs is at 8600 rpm.

 

Weird, I scanned this from a 2000 R Brochure

 

nice

 

I heard what you said before.

I don't care what the brochure says.

It's wrong.

 

*As unargumentative as possible*

Based on what? Because you say so? Or our really accurate tach? Honda doesn't know the fuel cutoff of their own car?

 

the fuel cut is 8500, but it's just a fuel cut, it wont immediately stop the engine from spinning higher, but it is set at 8500.