p13 or p72 - Honda Prelude Forum

vteclude1234 · 07-08-2002, 11:19 AM

ok guys i got both a p13 and a p72 (gsr ecu). Both are obd1, but i was wondering which would run my jdm h22a better. Ive heard that the p72 vtec drop off isn't as agressive. Anyway need some comments.

thanks
Ricky

Satan_SRV · 07-08-2002, 11:33 AM

http://www.importreview.com/reviews/PreludeECUtest.html

you definitely need at LEAST a v-afc to safely run a p72.

raise the VTEC point to get rid of the huge bog...and you will like the higher top end. Plus Hondata can reprogram the p72 for ya in the future

vteclude1234 · 07-08-2002, 10:29 PM

ok well explain how it isn't safe.

CrazyKid · 07-08-2002, 11:05 PM

well you dont NEED a VAFC... you can run it without... but i would be very careful... and make sure you a a/f gauge.. make sure you dont run it lean... thats bad...

i wanna try this if i can find a ecu... i wanna test it to see what kinda diffrence it makes on the race track....

Satan_SRV · 07-09-2002, 11:19 AM

Quote:

Originally posted by CrazyKid
well you dont NEED a VAFC... you can run it without... but i would be very careful... and make sure you a a/f gauge.. make sure you dont run it lean... thats bad...

i wanna try this if i can find a ecu... i wanna test it to see what kinda diffrence it makes on the race track....

you can borrow mine when it arrives!

brendon2k · 07-09-2002, 11:23 AM

is p13 the h22 ecu or h23 ecu?

brendon2k · 07-09-2002, 11:24 AM

Quote:

Originally posted by Satan_SRV
http://www.importreview.com/reviews/PreludeECUtest.html

you definitely need at LEAST a v-afc to safely run a p72.

raise the VTEC point to get rid of the huge bog...and you will like the higher top end. Plus Hondata can reprogram the p72 for ya in the future

I would think that you would want to lower the crossover point since it is higher on a gsr than a h22.

Eddiebx · 07-09-2002, 12:36 PM

Actually I think the P72 ecu's vtec point is lower than the P13. So we would actually need to raise it a bit, and put in some more fuel. I've tried the P72 out before, and the low end kinda sucks on it, just like the dyno plots show, but the top end is better,

Eddie

Si4WS · 07-09-2002, 01:22 PM

Quote:

Originally posted by brendon2k
is p13 the h22 ecu or h23 ecu?

P13 is h22, p14 is h23

96SR-V · 07-09-2002, 06:13 PM

If you start playing around w/ ecu's you should be looking at a hondata system for tuning... Best bang for the buck

H22 Bastard · 07-09-2002, 08:31 PM

Looks like that the GSR ecu is what i need for my setup.

How much do they usually go for?

Satan_SRV · 07-09-2002, 10:31 PM

Quote:

Originally posted by brendon2k

I would think that you would want to lower the crossover point since it is higher on a gsr than a h22.

Umm VTEC is 4400 in a GS-R

Satan_SRV · 07-09-2002, 10:32 PM

Quote:

Originally posted by H22 Bastard
Looks like that the GSR ecu is what i need for my setup.

How much do they usually go for?

I have one for sale...mugen spec...let me know if you're interested...$250....

vteclude1234 · 07-10-2002, 12:24 AM

ok ive decided im gonna run this gsr (p72) ecu. What all do i need todo to safely do this. I will have a vafc before i run it again. What do you guys think?

H22 Bastard · 07-10-2002, 02:02 AM

Quote:

Originally posted by Satan_SRV

I have one for sale...mugen spec...let me know if you're interested...$250....

Why are you selling it? Do i need to modify/or get new harness for mine to work on the GSR ecu? Got AIM or any messenger?

Satan_SRV · 07-10-2002, 12:44 PM

Quote:

Originally posted by H22 Bastard

Why are you selling it? Do i need to modify/or get new harness for mine to work on the GSR ecu? Got AIM or any messenger?

I'm selling it because I will go standalone if I do what I am planning. If you have an OBDI car it will plug right in.

I don't recommend it for preludes though...the redline is 9500 on the mugen spec. You would need to use the rev limiter chips that come with an MSD ignition to cover your but until you raise your powerband and fix up your internals

BBYlude · 08-31-2006, 06:22 PM

I know I'm raising this from the dead, but with a 'chipped' p72, will I need to get a VAFC? Will the VTEC point be corrected? Will the A/F ratio be fine? It is advertised as just that, a chipped p72. I don't know anything else about these.

slipknot95758 · 08-31-2006, 06:26 PM

i wouldnt mess with it unless you go with hondata in it, and get it tuned if your gona run a vfac with it you pay aswell just run the vfac on your p13