Show of hands please. Do you like it? Do you think it is a good mod?

 

Personally, I couldn't tell you if it was a good mod or not. It does allow you more freedom in terms of performance vs. emissions controls. Less problems with things like testpipes and such, since OBDI will ignore that dirty exhaust passing over the secondary O2 sensor...

I suppose I do still have in on my R, you can take that for what it's worth... I'm running pretty rich at the moment though, but that's another issue all together.. At least I'm free from CEL's...

 

It's not a mod to increase performance. All it does really is turn off those stupid CEL's

edit: OBDI > OBDII for a performance increase is a myth

 

Of course if HAVE to convert to OBDI to use Hondata because that's a requirement. People simply put it that if they convert from OBDII to ORBDI there are gains involved. That in itself is untrue.
Apples to apples that's the truth.

I can say adding an AEM EMS to a stock ECU will yield gains too, but that's not the arguement.

Long story short... if you expect gains from converting it from OBDII to OBDI, then doing that alone will yield you no gains.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by [TODA R &raquo;</TD></TR><TR><TD CLASS="quote"> 2000]

Converting to OBD1 its neccesary to run a chip if you are running a p28.

Kenji's program which is a chip, has been dyno plenty of times against a stock ecu.

Gains are significant.

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

That's not comparing apples to apples. That's a "chipped" ECU.
We're talking to just a straight conversion. All you're doing is stating the obvious.
Anything aftermarket (more than likely) as long as it's curved for the application, will make gains. Like Kenji's ECU.

He asked "How many R owners have OBDII to OBDI conversion?" and "Show of hands please. Do you like it? Do you think it is a good mod?"

That's a vague question which is entitled to a vague answer. If he wants to know if an aftermarket ECU will net gains, that's a different story.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by [TODA R &raquo;</TD></TR><TR><TD CLASS="quote"> 2000]

So he's stuck w/ running a p72 ? which would be downgrading ecu's.

What choices of "stock" ecu's are there for obd1?

Its almost a given that when you covert to obd1 then you are most likely going to run the p28 which NEEDS a chip to run on dohc motors.</TD></TR></TABLE>


straight ecu swap is pointless, obd1 is what hondata based on and whatever other ecu programs.. so if you're just swapping for obd1 ecu, its waiste of time.. the whole point is to make custom maps for your application. doesn't really matter what ecu to extend, as long as it compatible with tuning software you're goign to tune/chip with.

you can keep obd2 with aem, but not sure if their latest software is compatible with emmisions. obd1 wont' pass emmisions for ecu test.

 

I was using OBDI+Kenji's ITR program for awhile, and it improved the midrange torque, while smoothing out the powerband. Good mod for the money, but ran very rich.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by vtec.dc2 &raquo;</TD></TR><TR><TD CLASS="quote">


straight ecu swap is pointless, obd1 is what hondata based on and whatever other ecu programs.. so if you're just swapping for obd1 ecu, its waiste of time.. the whole point is to make custom maps for your application. doesn't really matter what ecu to extend, as long as it compatible with tuning software you're goign to tune/chip with.

you can keep obd2 with aem, but not sure if their latest software is compatible with emmisions. obd1 wont' pass emmisions for ecu test.</TD></TR></TABLE>


I think the confusion here would be best fizzled if you simply mentioned something to this effect (some people aren't seeing your point to clearly):

"straight ecu swap is pointless -&gt; if swapping in a completely stock OBD1 ecu to replace the OBD2 system and then planning to have a car pass emissions"

Emissions aside, there is some gain in doing this though; deletion of those pesky US OBD2 sensors.

Converting to OBD1 is a great mod if you plan to have the ecu reprogrammed in respect to your specific engine setup, and if emmissions is not an issue!

 

where can i get the kenji ecu?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by volkknockoff &raquo;</TD></TR><TR><TD CLASS="quote">where can i get the kenji ecu?</TD></TR></TABLE>
https://honda-tech.com/zerouser...=2322

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by vtec.dc2 &raquo;</TD></TR><TR><TD CLASS="quote">


you can keep obd2 with aem, but not sure if their latest software is compatible with emmisions. </TD></TR></TABLE>


really? first i've heard of it... got a link?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by vtec.dc2 &raquo;</TD></TR><TR><TD CLASS="quote">
You can keep obd2 with aem, but not sure if their latest software is compatible with emmisions. obd1 wont' pass emmisions for ecu test.</TD></TR></TABLE>

I think you're confusing the harness plugs on the AEM. They have harness plugs on the AEM that mate to OBD2 cars, but that does not mean they retain the OBD2 emissions standards...I couldn't tell you 100% if the Honda software has the emission controlls a stock OBD2 ECU has, but I know for a fact the Supra software for OBD2 AEM's are the same as OBD1, just a different harness plugs.

 

&lt;---- P28 OBD1 on 2000 ITR




Modified by Big Phat R at 10:14 AM 3/26/2004

 

i dont consider the convert a mod, but it can i guess, it's just easier to tune and for emissions. but ive seen plenty of odb2 make the same performance as odb2 so it's like no difference.

 

To stay obd2 without cell get JDM obd2 ecu
Like p73-013 (98 spec ) Little gain.

 

i converted and am running a chipped p28 from IH8RICERZ and i feel it was TOTALLY worth the gains ESPECIALLY in the mid-range. but of course i made my own harness that was a total of about $15 and my chipped p28 was a total of $85!! so really for the $100 that i spent was WELL worth it..... i would recommend it to anyone

-chris

 

Kenji's ecu see sig

 

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


really? first i've heard of it... got a link?</TD></TR></TABLE>

well.. you don't have to convert anything - no harness and stuff.. i'm not sure about emmisions support with their latest software, i know previous version will not pass emissions. hondata has emmisions support for rsx obd2.

 

it should still read all of the obd2 sensors.. - that would make it... ehh.. obd2? - anyone with aem chime into this..

 

.....yeah, but does the aem "obd2" actually emulate the immobilizer for the chipped keys?

 

immobilizer is in ecu and i don't think aem has that feature. i guess best way to word this IS to say, AEM is OBD2 compatible - in other words, if you have OBD2 car, aem is plug-n-play.. tune.