is it possible to use a gsr ecu on a h22 motor in a accord. would it be a
plug n' play situation. or do i to change some wiring?

 

I have one on my H22 in my Accord. You will have to swap two of the pinouts though. One is the EGR wire, and I can not remember what the other one was. I will have to look at my ECU. Give me a couple of days and I can check if no one else knows.

My ECU was reprogramed by HASport to fix the fuel/ignition problem at the VTEC crossover, and my rev limiter was bumper up to 8500.

 

You can, but the ignition curves for these two engines are totally different. In a few weeks time with our Hondata stage 1 ($225) system you will be able to install a dynotuned H22 map into the P72 ECU.

Doug

 

Will this upcoming feature work on a p28?

 

does putting the GSR ecu, as oppsoted to just an h22 ECU, have any benifits? pro's or cons? i dont know much about it...

 

ANYONE know?

 

not too sure but my friend is using a p28 with his h22 94 accord and it works fine no cel and its much faster. the 7200 redline sucks though.

 

Pros - Better top end power.

Cons - Lag at the VTEC x-over.

Fix - get it reprogrammed to optimize fuel and ignition curve better.

That is what I did.

 

the main reason why people use the P72 GSR ECU for the H22A prelude is merely for OBD I conversion. it's much cheaper and easier since the GSR and ECU work with saturated injectors, while the older P28 ECU works only with peak and hold injectors.

 

I'm not into H22's much, buuuut....
word has gone round that using a GSR ECU, even in stock form, runs a lot better than a stock P13 (prelude) ECU. This is all on OBD1 terms of course (screw OBD2!). The reason why people use the P72 ECU is because of the 2ndary butterfly operations which an H22A intake system has much like a GSR's intake. According to some people who replied back to your post, they say running a P28 ECU 'felt' good on an H22A -- I wonder if low end torque is lost since the P28 ECU does NOT control the secondary butterflies -- as a P72 or P13 ECU would. It's been dyno proven on a stock GSR engine that running a Single butterfly programmed actually lost about 10ft of torque. So, you might risk loosing torque if you run a single butterfly programmed ECU on Dual butterfly intake manifold engine (GSR and H22).

P28 = Single butterfly programmed ECU.
P72/P13 = Dual butterfly programmed ECU.

Hmm, this brings up something I should test....but then I'm gonna need a dyno to test my results out. I'm gonna try putting a GSR program on a P28 ECU, do a couple dyno runs with these tests:

1) dyno baseline run, stock GSR engine w/ stock ECU

2) dyno baseling run, stock GSR engine w/reprogrammed P28 on a single butterfly mugen program. (well we know how this one works out already -- loses 10ftlbs of tq)

3) dyno baseline run, stock GSR engine w/reprogrammed P28 w/a performance GSR dual butterfly program

..and see what the results are..hrm...
Thing is, I really don't think the P28 ECU has the onboard hardware to operate the secondary butterflies

one day I'll do this test.....one day!

P.S..
Whichever ECU you go with, and if you ever have it reprogrammed, I highly suggest you do NOT get a redline higher than 8500rpm. H22's are very fragile and are known to blow, if overreved past 8500, so be careful with your engine reving! Just a word of advic, that's all. (coming from my limited knowledge of the H22)

Also, if you have a P13 ECU and you want to get rid of it....please let me know. I'm in the need of a JDM P13 ECU -- I have a US P13 ECU I can trade for JDM P13, all stock, if anyone wants to do a str8 trade and help a brotha out

.....lates.


[Modified by Katman, 11:34 AM 12/2/2001]


[Modified by Katman, 11:35 AM 12/2/2001]