would a p28 ecu run right for my 5th gen base model??( compared to stock ) im doing a whole complete valve train setup from skunk2 including the proseries stage 1 camshafts

You will need to chip the P28 to run correctly on an H22. Chipped and tuned is highly recommended..

a P28 ecu's stock map is made to run a sohc motor, and it's base map is WAY off of the prelude's stock map. The only reason it would be good to use a P28 is if you have some kind of system (hondata, crome, neptune....etc.) to datalog with so that it can be tuned. You will of course also need a Obd2-Obd1 conversion harness so that the computer will plug in, and you'll also have to chip the computer so that the datalogging system can plug into it.

But just plugging it in will not do you any good....in fact, i doubt it would even start the car.

It probably would start the car... I'm almost sure people have done it on P28's and P72's.. I know I read a thread awhile back where there was a debate over running the P28/P72 was safe or not. Some saying it shouldn't/wouldn't work and was hazardous to the engine. While the guys that had done it were saying they saw/felt power gains from the P28/P72.

I still say he should Chip and Tune it at the very least.. And the stand alone system Chris mentioned should be considered..

hmm yeah im tryin to get the info to see if i should order it .. it comes with p28 chipped and tuned for 350 but i dont want any problems with the car in the long run

sacramento motoring accessories ( SMA ) is gonna do all that crap

What comes with the P28 Chipped and Tuned??

And what is it Chipped and Tuned for? This matters..


They're going to do which crap?

i've had very bad experiences with ecu and computers on the cars lol thanks for the advice guys

im not sure but i told em to put it on hold for now so im not gonna do the ecu upgrade yet, i wanna research more about these ECU's

cause they said soemthing about p28 now and later go with hondata

Well you can Chip the P28 for an H22 and it would work. Only thing is that it would not control the Butterfly Valve's in the Intake Manifold... (That is, without modification to the P28 Circuit Board.)

A P72 would/could control them.

You could get the P28 and have it Chipped for the H22 and later get a Hondata to use with it. That's no problem.


Also, the P28 doesn't use the Knock Sensor, and I think the P72 also, but not sure on it though, minds blank right now..

lol sorry you probably have a headache due to all these ecu questions lol

go check out hondata's website. they have a list of a bunch of engine/ecu possibilities and suggestions.

read the faq

https://honda-tech.com/zerothread?id=567799