I know this is basic but what are the diffrences between the PR3 and the PW0 ecu?

 

one came out of the siR and the other came out of a xsi

 

but the specs are the same right?

 

yes. it has been rumored that there are different fuel maps or something like that, who knows....but if you swapped them in your car you WONT notice a difference.

 

i have them both and with my setup I noticed a little better response out of the PR3

 

i honestly highly doubt that. im not saying that you didnt feel a better response out of your motor its just that there are so many different variables going into that kind of 'test' that you would notice more of a difference in daytime vs nighttime power. intake air temp for example.

 

From what I understand the Pwo's rev limiter kicks in a little sooner, but the fuel and timing maps are the same (well, this is what Katman says, anyhow).

 

for me any thing would work right now, i got a pw0 ecu and the vtec doesn't activate

 

that most likely has something to do with your wiring.

 

They are both the same thing, rev limit, Vtec engagement, and all that stuff. Only thing is the PR3 can easily be chipped while the PWO to my understanding is way different and many places don't even bother.

 

I believe Kenji still does the FEELS program for the PWO.

 

I can chip both the PW0 and PR3.

Email me at kenji211@tampabay.rr.com if you are interested.

-kenji

 

which one takes more kindly to reprogramming ? i always heard the pw0 is more chip or reprogramming friendly .

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by biggdogg &raquo;</TD></TR><TR><TD CLASS="quote">which one takes more kindly to reprogramming ? i always heard the pw0 is more chip or reprogramming friendly .</TD></TR></TABLE>

PR3 is more programmable.

Raene chipped my Pw0 though and I ran a spoon, and feels program for a while. Right now I'm running a self-modified Pw0 program (vtec adjusted, rev limit raised).

 

no i'm pretty sure what I felt I even tried it a couple times after reading your reply... there is a small be noticabl difference with the stock PR3 over the PW0.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by crxman00 &raquo;</TD></TR><TR><TD CLASS="quote">no i'm pretty sure what I felt I even tried it a couple times after reading your reply... there is a small be noticabl difference with the stock PR3 over the PW0.</TD></TR></TABLE>

Your mind is tricking you.

 

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

Your mind is tricking you.</TD></TR></TABLE>

Although I agree that your mind is tricking you, this might be interesting. You should do a blind study. Have a friend mix them up and plug them into your car without telling you which one is which, then try to guess. You'd have to run like a dozen or so tests, but it wouldn't take too long.

 

I thought about trying that but I had the PR3 sent off for chipping and since then I had the Pw0 chipped. So we'll never know...

 

Why not just buy a cheap ZIF socket, download free software, buy a $5 EPROM chip, buy a $60 burner and $10 printer cable and program your own damn rev limits, fuel + ignition maps Screw doing 20+ tests to determine a miniscule difference between PR3/PW0, and forget paying cash for a program when you don't know what fuel + ignition it has.

I've run both and noticed absolutely no difference. Now I run self-chipped Uberdata and don't care.

 

PR3

according to Ericks Racing...a pr3 has more options when it comes to reprogramming.

an old thread i started a while back:
https://honda-tech.com/zerothread?id=595466

 

hey i have the same problem, with my pr3 in my crx with the jdm b16a swap as soon as i reach vtec my motor sounds like it is floating the valves. It looses all go and wont go. I plugged my stock ecu in (pm6) and the motor works just fine. I used to have a vafc and when i would switch it to 6 cyl mode my car wouldnt do it either. Whats up here?