I have 95 Civic with a 97 JDM ITR Swap and curently running a jumper harness with a JDM P73 ECU.

I also have a 2001 USDM P73 ECU with a Immobilizer.

Any benefits for me to run the USDM to oppose the JDM or Vice Versa ?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by neo_ &raquo;</TD></TR><TR><TD CLASS="quote">JDM ECU has a speed limiter. </TD></TR></TABLE>

Thanks for the reply.

Other then that and the immobilizer, they're both the same thing correct ?

But doesn't the JDM engine have higher compression ?

or it doesn't matter ?

 

Just wondering the same thing, i have both the jdm and usdm p73's, the usdm one seems to runmy car really rich! But the usdm runs my friends gsr like a champ. GO figure. I was just wondering if there is any way to remove the speed limiter on the jdm p73. Thanks.

 

I use the JD P73 on my B18C (11:1) and i got the APEXi RSM to remove the speed limiter. The B18C5 (USDM) is at 10,6:1, so it has a bit lower compresion

 

i have the jdm p73 and i like it better cause it only reads the primary o2 sensor,

 

Thanks for the replies.

How about if I smog my car would USDM P73 ECU run cleaner ?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by mr_gs-r &raquo;</TD></TR><TR><TD CLASS="quote">But the usdm runs my friends gsr like a champ. GO figure.</TD></TR></TABLE>

I hope your friend doesn't have the stock gsr intake manifold still, the P73 ECU will not pull out the full potential as it will not open the secondary butterflies within the manifold (the short runners)

 

Adding to whats been posted...

USDM = 8400 rpm redline, looks for VtecH pressure switch...
JDM = 8900 rpm redline doesn't look for VtecH pressure switch...


Modified by Circuit Star-29 at 7:57 AM 5/9/2006

 

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

I hope your friend doesn't have the stock gsr intake manifold still, the P73 ECU will not pull out the full potential as it will not open the secondary butterflies within the manifold (the short runners)</TD></TR></TABLE>

it was just for a test run to make sure the ECU was legit he doesnt actuall run that ecu in his car. <TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Circuit Star-29 &raquo;</TD></TR><TR><TD CLASS="quote">Adding to whats been posted...

USDM = 8400 rpm redline, looks for VtecH pressure switch...
JDM = 8900 rpm redline doesn't look for VtecH pressure switch...</TD></TR></TABLE>

its vtec...and is this correct, dont think so casue my jdm willl not pull almost 9 grand

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by jdmhonda &raquo;</TD></TR><TR><TD CLASS="quote">i have the jdm p73 and i like it better cause it only reads the primary o2 sensor,</TD></TR></TABLE>

also the reason i like it, that and it not reading the oil pressure switch and cfk sensor.


and for the record the RSM is a unit like the VAFC2 correct? How does it allow you to remove the speed limiter.

I found a unit made by HKS called a SLD (speed limiter defender) but it reatils for 140-150 shipped. But it will remove the speed limiter.

 

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

its vtec...and is this correct, dont think so casue my jdm willl not pull almost 9 grand


</TD></TR></TABLE>


Dood...Its a joke...VteCH .. Nm... Yes, its correct. Im looking at the base map right now.

The RSM is like a GTECH...Not a VAFC.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Circuit Star-29 &raquo;</TD></TR><TR><TD CLASS="quote">USDM = 8400 rpm redline, looks for VtecH pressure switch...
JDM = 8900 rpm redline doesn't look for VtecH pressure switch...</TD></TR></TABLE>

Wrong, all DC2 ITR's have the same redline. All of them.

 

Im looking at the base map right now

Excuse me...Fuel cut off...

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Circuit Star-29 &raquo;</TD></TR><TR><TD CLASS="quote">Im looking at the base map right now </TD></TR></TABLE>

I could care less what you're looking at.

If the JDM P73 has a redline of 8900 rpm, why don't JDM ITR tachometers show a higher redline? Does it make sense to you that the JDM ITR's have a redline of 8400 rpm on the tach, but can rev to 8900 rpm?

 

ok...now that we have all of that cleared up. Whats the easiest way to remove my speed limiter.

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

Wrong, all DC2 ITR's have the same redline. All of them.</TD></TR></TABLE>
and that is 8400 correct.

so how does the rsm go about removung the speed limiter if its like a gtec? All a gtec does is monitor the rpm, hp, 0 to 60...etc?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Reid &raquo;</TD></TR><TR><TD CLASS="quote">I could care less what you're looking at.

If the JDM P73 has a redline of 8900 rpm, why don't JDM ITR tachometers show a higher redline? Does it make sense to you that the JDM ITR's have a redline of 8400 rpm on the tach, but can rev to 8900 rpm?</TD></TR></TABLE>

Invalid...Base RSX redlines at 6800 and revs to 7000.
My 91 prelude redlined at 6500...but revved t0 7200.

Redline is MARKED at 8400...However, the fuel CUTOFF on a JDM ITR ECU is 8900.

And its spelled GTECH... RSM = REV SPEED METER.


Im glad Reid is in a goot mood this morning...I might have lost some points while fighting with him...Even if I am wrong.

 

well hell i have a problem then my jdm p73 will not rev to 8900 rpm. it will rev to 8400 though.

And before you even say it i know that it is a jdm ecu becasue i have no 2ndary o2, no cfk sensor, no oil pressure switch, and no cel for any of the above...

so explain that one to me.

Also i think the HKS sld is my best bet for removng the speed limiter since it simply targets that and eliminates it, however i am curious as to how the GTECH removes the rsm?

 

OMG....

Gtech meter is the same or similar to a RSM, which = Rev speed meter. Gtech doesn't remove anything...if the RSM unit does, great.

Just get a socketed ecu...then you can remove the speed limiter or anyother function you'd like to remove.

And it is quite possible that the map im looking at is Not original...It damn well should be though...I think you should have a lil more cander when talking...

Hey Reid, this buds for you...


Modified by Circuit Star-29 at 8:47 AM 5/9/2006

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Circuit Star-29 &raquo;</TD></TR><TR><TD CLASS="quote">OMG....

Gtech meter is the same or similar to a RSM, which = Rev speed meter. Gtech doesn't remove anything...if the RSM unit does, great.

Just get a socketed ecu...then you can remove the speed limiter or anyother function you'd like to remove.



Hey Reid, this buds for you... </TD></TR></TABLE>

ok...well

i dont want to have to go through having to socket the ecu...and then have a chip burnt...etc. I already have a p28 chipped for hondata, but i am sorta skeptic anout switching to odd1...may do this though after some more mods to get the most out of my setup.

i didnt know the background on the GTECH, thought it was like a stupid little in car dyno rip off that suction cups to the windshield.

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by khmoe &raquo;</TD></TR><TR><TD CLASS="quote">I use the JD P73 on my B18C (11:1) and i got the APEXi RSM to remove the speed limiter. The B18C5 (USDM) is at 10,6:1, so it has a bit lower compresion </TD></TR></TABLE>
so you actually use the APEXi rsm to remove the speed limiter? Just wanting to verify, any info on how it is hooked up or how it accomplishes this task? Thanks.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by mr_gs-r &raquo;</TD></TR><TR><TD CLASS="quote">ok...well

i dont want to have to go through having to socket the ecu...and then have a chip burnt...etc. I already have a p28 chipped for hondata, but i am sorta skeptic anout switching to odd1...may do this though after some more mods to get the most out of my setup.

i didnt know the background on the GTECH, thought it was like a stupid little in car dyno rip off that suction cups to the windshield.


</TD></TR></TABLE>

OBD1 is your best bet as far as getting everything out of your motor. OBd2 leaves it too difficult to tune some aspects of the motor while preventing the tuning of other features. If you have Hondata, have it installed and tuned...You'll love the outcome.

Gtech is that stupid little in-car dyno thingy...It actually works quite well. I had a chance to test one at a dyno day we held last year and the Gtech was within 2% or Hp and torque. It was the only device that we had to measure lat or long forces so I have to say that its pretty close. The newer version is supposed to be even better..

You have to make sure the enter in your cars' specs as closely as possible into the unit....I.e., wieght, tire size...etc.

 

oh i'll give you the fact that it is accurate, some friends and i picked up one for kicks and giggles before we went to dyno last yr and it was pretty close to the dyno numbers.

But i believe that someone methioned that it could be used to remove the speed limiter previously in this thread...and i was wondering how it would do that since its simply a monitoring device.

I have a chipped p28, but not hondata. I was thinking of running chrome or neptune on it though, i cant decide thats why i havent purchsed the managment yet.

But still i am confused as top how my jdm p73 does not have this mystical 8900 rpm redline...it makes me question it i have a ecu problem or what, oh and for the record the jdm p73 also showed a 8400 rpm redline in the gsr that it was tested in...

 

The jdm p73 doesn't have a fuel cut off of 8900rpm, its 8400rpm. It has the same fuel cut off as the usdm p73 ecu. Who ever tells you different doesn't know what their talking about. The rsm will infact remove the speed limiter in the jdm ecu. When you install it you cut into the speed wire that goes to the ecu. When you reach 115-120mph(the speed limiter) the rsm sends a signal to the ecu making it think your under this speed.

 

well looks like i need a APEXi RSM then...lol. I knew it was 8400 i was just givin dude a hard time. Thanks for the how it works 2kgs-r.

 

If I removed the immobilizer, the CEL will always be on right ?

Anyway to make it turn off without removing the light bulb.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Wannbe Racer &raquo;</TD></TR><TR><TD CLASS="quote">If I removed the immobilizer, the CEL will always be on right ?

Anyway to make it turn off without removing the light bulb.</TD></TR></TABLE>

Corret, there is no way around this unless you have an ignition system that can read the key and you get the key programmed to match the code in the ecu. I had to do this at the dealer. However I have a 2k integra so I didn't have to upgrade my ignition system.

 

isnt a 2001 usdm p73 ecu ob2b? im sure it reads for a crank sensor. how would you get passed that? thats the only reason i couldnt use my usdm ecu. i had to run the jdm ecu using a 2b to 2a conversion harness.