can i use h23 ecu if i swap in h22? - Honda Prelude Forum

tastyratz · 08-08-2002, 10:41 AM

i know it wont have vtec and will run screwey but will it be safe to run for a few weeks till i can get some more $ and buy an ecu?

bboy'lude · 08-08-2002, 01:15 PM

yes you can.

ive done it and it works fine.

preludestud11 · 08-08-2002, 01:17 PM

It would be fine to use it, it shoudlnt even run bad, only problem youll have is no vtec, and your redline is going to be at 6400rpm.

Rich

Satan_SRV · 08-08-2002, 01:20 PM

And you won't have a knock sensor, but you didn't have that before.

But on the bright side your Secondary IAB's will work too...

payluders · 08-08-2002, 01:56 PM

It should work fine. I'm doing a swap on my car now and I'm using
my old h23 ecu, and the guy said he will take out the h23 ecu rev limiter so I can rev higher. He also said I would be able to use my v-tec too I will get more info for you when I'm done with it

93si4ws · 08-08-2002, 03:40 PM

you WILL have a knock sensor reading with the p14 ecm. and it'll run just fine till you get your p13 ecm.

v

accorracer · 08-08-2002, 07:24 PM

just get a cheap p28 you'll have a 7500 redline

Prelude_RCR · 08-09-2002, 09:42 AM

Yea, but no IAB. And wrong fuel/timing maps as well.

Satan_SRV · 08-09-2002, 10:25 AM

Quote:

Originally posted by Prelude_RCR
Yea, but no IAB. And wrong fuel/timing maps as well.

yeah really LEAN fuel maps.

hey is hondata wrong? http://www.hondata.com/prelude9295.html it says the p14 has no knock sensor

Forbidden · 08-09-2002, 12:43 PM

Yes they are wrong! My Helm says it has one and I even broke mine on my H23 when I was trying to remove the connector on it.

Grant · 08-09-2002, 01:35 PM

Could you just set up a V-AFC to kick on the vtec solinoid at the right RPM? Then you might not need to get a p13 ecu...

I really don't know if this will work. I'm just thinking out loud so to say..

brendon2k · 08-09-2002, 03:31 PM

Quote:

Originally posted by Grant from Toronto
Could you just set up a V-AFC to kick on the vtec solinoid at the right RPM? Then you might not need to get a p13 ecu...

I really don't know if this will work. I'm just thinking out loud so to say..

I dont think so. I think you need the ecu to do the switch over and the VAFC just can change the cross over point.

Satan_SRV · 08-09-2002, 05:55 PM

Quote:

Originally posted by brendon2k

I dont think so. I think you need the ecu to do the switch over and the VAFC just can change the cross over point.

The crossover just piggybacks the ECU link the VTEC solenoid anyway doesn't it? So in theory if it was the only thing connected to the VTEC solenoid it should still work I think...

4thGVtec · 08-09-2002, 09:26 PM

tou dissconnect the wire controlling your vtec solinod from your ecu when you install a vafc, your vtec controller completly controlls it then

accorracer · 08-10-2002, 12:55 AM

Quote:

Originally posted by Prelude_RCR
Yea, but no IAB. And wrong fuel/timing maps as well.

well my jdm motor came with all the iab valves smashed and i got my p28 chipped so i don't have either of these problems

92H22A4 · 08-10-2002, 09:17 PM

Yes it'll work. I've ran mine for about a year, before I found a '95 H22A ECU for $408.

Since you have an H23 before. You should have a Knock sensor. The only thing that you won't have is VTEC.

"NO". VAFC won't engage your VTEC. It'll activate the selanoid, but VTEC won't work, because you don't have the extra fuel into the motor. Your car will just feel slower like your pulling something.

The theory works, but reall life doesn't. I've tried it.

Just plug in the ECU and drive a normal Prelude SI until you get a VTEC ECU and then drive like a Prelude VTEC...lol...

Grant · 08-11-2002, 12:26 AM

So using the "hi" map to correct the fuel map to the proper flow rates won't work?

Forbidden · 08-11-2002, 02:40 PM

$408 for an H22 ECU? I paid mine 150$CDN