My setup consists of a LS/VTEC in my 90 CRX.

My question is, is it worth modding my OBD0 PW0 to a Hondata system?

What are the pros and cons of converting, lets say to a OBD1 P28, P72, etc...?

 

hmm im in the same situation as you and would like to gather as much info as possible

i think the choices are

1. OBD 0 with hondata stage2/3/4

2. conver to OBD 1 with hondata

3. OBD 0 with VAFC

anyone??

 

I am thinking about a obd0 hondata. It is pretty new so i haven't seen anyone using it. anyone?

 

Converting to OBDI with Hondata will be expensive if money is a factor.

 

i have a stock PR3 with stage 2 hondata...no problems. Although I havent tried or driven a car with obd1 s200 hondata with similar mods as mine that I can compare to...I started out with a pr3 already so it made it a bit easier and cheaper. If I started out running obd1 then of course, I'd get the newer S200 hondata.

 

Did you do any baseline dyno testing? I would love to see a before/after dyno of the obd0 hondata.

 

here's my old dyno sheet...

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by EF_LSVtec &raquo;</TD></TR><TR><TD CLASS="quote">here's my old dyno sheet...
</TD></TR></TABLE>

whoa thats good!!!

how come the baseline is missing a part on the graph?

 

not really sure why...I'm guessing that when my motor hit vtec at 5500, i lost power and signal was really inconsistent. btw, i have Toda spec C's now and hopefully finish getting it tuned by next weekends' autoX. The baseline dyno was at 196.9 whp and torque went down a bit at 135.0...I'll post the final numbers soon.

 

How does a PW0 compare to a PR3?

 

stock for stock, pwo has a lower rev limit and vtec engagement and have less aftermarket software available. But since you're getting hondata and will eventually get tuned according to your motor, you dont really have to worry about how one's better than the other. Rev limit, fuel maps etc, will be reprogrammed anyway.

 

so who tuned it for you?

did you have any problems with the opened/closed loop? im very confused about the two....

 

Lawrence @ Dynospot in San Jose, Ca. tuned my hondata. I read the pr3 issues on the hondata sight but didnt really pay much attention to it. Only problem I had was when my ecu was being programmed in the beginning, it wasnt taking the new fuel maps and what not...Lawrence thought that it maybe just a bad chip. It was fine ever since after he replaced it.

 

anyone else??

 

im running a chipped PWO. BTW the stock PWO revlimit is 8200 according to my VAFC u need to ask someone who knows alot about hondata, there are alot of limitations on tuning obd0 and my tuner advised me that if im going to turbo i need obd1 conversion..
right now im running vafc chipped ecu and fpr

 

I also am in the same situation. I have a pr4 block w/ p72 crank, p73 rods and pct pistons and an short runner, custom made intake manifold that flows awesome at high revs. The reason that I went with the p72 crank to obtain a better r/s ratio and more sane piston speeds as compared with a pr4 crank. So anyway, while looking for engine management, I learned that with the hondata obd 0, pr3/pwo setups, you can ONLY REV TO 9000rpm. I say "only" cuz I built the motor to go to like 9.6k+. So if I do a obd0-obd1 conversion w/ hondata I will be able to rev. I am currently working on the conversion harness DIY.

 

You don't really many any more power after 9,000 rpm anyways.