H23a Vtec SwaP - Honda Prelude Forum

shiftgearz · 01-18-2003, 06:03 PM

Ok Guys, I was going to get the h23a Vtec (from the 99+ Accord SiR Wagon), and slap a h22a Tranny, ECU and Distributor on it, but then I was told the ECU would NOT work properly with the h23a Vtec, I'm really confused at this point, I assumed that the h22 ecu would work but if not I don't want to risk it. I need some feedback and advice or technical info of you guys have any.

TIA

4thGVtec · 01-18-2003, 06:35 PM

i wonder why it wouldnt... GSR, sohc civic, prelude, and accord vtec ecus are all interchangable... some might not be as good as others.. but they will work

[SUB[EX] · 01-18-2003, 06:40 PM

As long as you use a vtec ecu i dont see why it wouldnt work. You might need some better fuel maps but that can be done later.

Zimmlude · 01-18-2003, 08:07 PM

You might run into some problems considering the engine is OBD-II. I know that some of the sensors are in different places so you might have some fun with the wiring harness. The ECU should work fine if you have all the sensors hooked up right. You might want to work on the fuel maps though. That extra 0.1 liters will require some more fuel. Maybe a V-AFC and some dyno tuning?

HTH

shiftgearz · 01-19-2003, 02:39 PM

Thanks guys, maybe I should should just go the h22 route... seems like less hassle, although I wanted the h23a vtec sooOo bad.

Thanks again, I will try to figure out what I want to do.

4thGVtec · 01-19-2003, 02:41 PM

go for the h23... in the long run you'll be happy. i think the p13 ecu will be fine

Satan_SRV · 01-19-2003, 03:25 PM

If you use a p13 ecu and an H22a engine harness everything will work fine. Just hook up the right stuff. Use an OBDI distributor and away you go. All DOHC VTEC ecus work the same way...

Let me put it to you like this, no one else has this engine on here that could give you a definitive answer. We can give you our best guess but if you have problems, you'll have to deal with them, and tell us about it.

shiftgearz · 01-19-2003, 06:38 PM

Yea it would be pretty sweet if I was one of the first people to go this route

of course there would be plenty of pictures

yohan420 · 01-21-2003, 06:11 PM

You should do a search on some of these posts, I was wondering the same thing .. Satan_SRV I think has a hybrid H23 .. but he blew it at 10k ... he was putting down some pretty nice numbers.

just search for my name and look for h23a vtec questions or something, im too lazy to post the URL of the thread but I have a lot of concern in the same area as you

especially with the ODB2 - ODB1 conversion.

92 SI Ludester · 01-21-2003, 08:02 PM

how much does a h23 vtec cost? and what are the specs on them?

SikRedRX-8 · 01-21-2003, 09:50 PM

There are a few of us here with the H23vtec, me satan and slp mode. I think that is it as far as I know. Do a search.

yohan420 · 01-22-2003, 09:14 AM

http://www.osakajdmmotors.com has the h23 vtec .

specs on the engine ...

did a google search for accord wagon sir engine spec

200hp@6800RPM/???lb-ft@5300
found here: http://www.vtectuning.com/enginechart.html

I found this as well, torque is apparently 21.0 kgm @ 5300 I guess ... when the vtec kicks in .. unfortunately i think this link might be for gran turismo .. grr.

http://gamegt.hp.infoseek.co.jp/g/0cf.htm

yohan420 · 01-22-2003, 09:24 AM

http://www.webcars.net/2431.htm

tada, now thats converted to
197.264BHP @ 6,800
162.675 ft.lb @ 5,300.

Is this really worth it now compared to h22 ?