I’m running a p72 stock ecu with my stock b17. Will this mess up my engine?
shouldnt be a problem. it might run a little rich though.
yeah shouldn’t be too big of a problem. the only issues might be for one, I would think the VTEC crossover point for ITR camshafts should be higher than on stock b17a1 cams. not sure how much you could tell though… any thoughts guys?
change it… just to be sure…
REMEMBER:ANY PROBLEMS WILL COST MONEY TO FIX
1st question: where is your stock ecu?
2nd question: why would you want to use a p72 ecu?
the p72(94-97 gsr) ecu will not hurt your engine. it will, however, hurt performance. why? the vtec kicks in at 4400 rpm. also, it may be looking for a signal from the secondary butterflies(which a 94 and up gsr has and kicks in at about 5700 rpm). if it doesn’t see a signal, it could trigger the cel and run in safe mode.
having the vtec kick in at 4400 is definitely a disadvantage with a single stage intake. read up on the vtec system and dual stage runners and you will understand why the b18c1 uses a crossover point than the b18a5/b16a. it’ll be a little long posting it here.
Originally posted by 2020ls
[B]1st question: where is your stock ecu?
2nd question: why would you want to use a p72 ecu?
the p72(94-97 gsr) ecu will not hurt your engine. it will, however, hurt performance. why? the vtec kicks in at 4400 rpm. also, it may be looking for a signal from the secondary butterflies(which a 94 and up gsr has and kicks in at about 5700 rpm). if it doesn’t see a signal, it could trigger the cel and run in safe mode.
[/B]
no such thing as as IAB CEL. ive run a P72 on a B16 and a B17, runs a little rich.
elmer- running rich on a stock motor is good?
also, you like your vtec kicking in at 4400 rpm?
there’s a reason why honda programmed their ecu’s differently. this is, of course, if you(anyone) have a stock motor and a stock ecu, which tenastelin had stated. i understand if you were just using it temporarily, but if anyone was using it thinking it would give better performance on a stock b17, i wouldn’t recomend it. my .02 cents.
Originally posted by 2020ls
[B]elmer- running rich on a stock motor is good?
also, you like your vtec kicking in at 4400 rpm?
there’s a reason why honda programmed their ecu’s differently. this is, of course, if you(anyone) have a stock motor and a stock ecu, which tenastelin had stated. i understand if you were just using it temporarily, but if anyone was using it thinking it would give better performance on a stock b17, i wouldn’t recomend it. my .02 cents. [/B]
the main reason people would use it is when they drop a b17 into their LS. just like when people dropa b16. It’s alot easier to find a p72 ecu and cheaper than to try and hunt down an ultra rare p61 ecu for the 92-93 gsrs. it’s not about getting better performance, it’s about getting their car to RUN. all you have to do is get a VAFC and you can switch the VTEC crossover point, and fine tune the air, fuel, etc to lean it out a bit.
Originally posted by 92GS-R
[B]
the main reason people would use it is when they drop a b17 into their LS. just like when people dropa b16. It’s alot easier to find a p72 ecu and cheaper than to try and hunt down an ultra rare p61 ecu for the 92-93 gsrs. it’s not about getting better performance, it’s about getting their car to RUN. all you have to do is get a VAFC and you can switch the VTEC crossover point, and fine tune the air, fuel, etc to lean it out a bit. [/B]
what do you mean its easier to find??!! i’ve got two p61’s right here in my bedroom! anyone care to take one off my hands??
Originally posted by 91IntegGS
[B]
what do you mean its easier to find??!! i’ve got two p61’s right here in my bedroom! anyone care to take one off my hands?? [/B]
that’s cause you own 99% of all the p61 ecus you ecu whore! hehehehehe
I’ll take one for FREE… why do you have 2? hmmm… it would actually be nice to have another so I can chip both and swap them when I feel like it…
Originally posted by 92GS-R
[B]
that’s cause you own 99% of all the p61 ecus you ecu whore! hehehehehe
I’ll take one for FREE… why do you have 2? hmmm… it would actually be nice to have another so I can chip both and swap them when I feel like it… [/B]
free, huh tony? thats actually a pretty good price compared to some of the lowballs i’ve been getting!:roll:
i have two cause i bought one with the first b17a longblock i bought (i recently sold the longblock, but not the ecu) and then i got the other one with the totalled gsr i bought. for a while i had 2 b17’s in my garage!!! man i felt so special! When i just had one i was exstatic, but two!!!
Originally posted by 2020ls
[B]elmer- running rich on a stock motor is good?
also, you like your vtec kicking in at 4400 rpm?
there’s a reason why honda programmed their ecu’s differently. this is, of course, if you(anyone) have a stock motor and a stock ecu, which tenastelin had stated. i understand if you were just using it temporarily, but if anyone was using it thinking it would give better performance on a stock b17, i wouldn’t recomend it. my .02 cents. [/B]
no… running rich on any kind of motor is not good. robs you of power, fouls your plugs, and turns your rear bumper black.
no… i dont like my vtec crossing over at 4400rpm with the cams im using.
i simply stated that it will run a little rich, will not cause any permanent damage, and that i have tried a p72 on something other than a B18C.
:sleep:
Originally posted by 2020ls
the p72(94-97 gsr) ecu will not hurt your engine.
Umm, guess again on that one. Trying to use a 96-97 ECU wouldn’t be pretty.:roll:
in the original post, tenastelin stated that he was using a “stock” p72 ecu on his “stock” b17. he has a 93 gsr, am i not correct? if you have a 93 gsr, it should come with a p61, no? he asked how it would affect his motor, and i advised him on it. how hard was that to understand?
and jason- i simply stated that the p72 came in 94-97(actually up to '00) gsr’s, not that you could plug a 96-97 ecu into a 93 teg, but i’m sure everyone already knew that.:read:
Originally posted by 2020ls
and jason- i simply stated that the p72 came in 94-97(actually up to '00) gsr’s, not that you could plug a 96-97 ecu into a 93 teg, but i’m sure everyone already knew that.:read:
Actually up to '01 GSR’s.But it’s cool, I knew what you meant, just wasn’t sure if you knew.
jason- you sly guy. looks like you dunnit again. good eye. but hey, that’s what we’re all here for, right? to help each other out…
Thanks.
My gsr was a recovered theft. I bought a p72 cause I couldn’t find a p61. A couple months later I got a p61 for $100 from ebay! So I was just wondering cause I was thinking of chipping the p72.
I have 92 gsr and i want to know when does the vtec kick in for those cause i got mines kicking in at 4700 rpms stock motor just a sri. My car didn’t come with the stock ecu it came with the ls and when i bought the car i didn’t know about honda’s and vtec. But a guy i know that works at the garge i go to and his buddy does the ecu chipping and he chipped mines and he go the vtec to kick in at 4700 but i just wanna know if it safe thanks.
I’m not sure on the durability of this setup, but I would bet the general consensus would be that performance would be hurt somewhat, and MPG would go down a lot. There’s lots of threads on kids who chipped their ecu’s to lower the vtec crossover. Most of the responders said performance would be less…either from lack of airflow or incorrect timing.
Stock crossover is about 5700 rpm - can change from diff oil pressures. Personally I prefer the late nature of the b17 cause I like to save gas and to keep the noise low for the popo.
running rich on any kind of motor is not good. robs you of power, fouls your plugs, and turns your rear bumper black
Interesting, cause I thought I had a stock b17 / p61 ecu. My vtec point is at 5600 rpm and i passed smog (lil high on the HC) but I get that black crap all over the back of my db2 within a couple hundred miles.
thanks alot i guess i should just find a stock ecu for my 92gsr but i heard it is going to be a bitch but i wanna know by me havin the ls ecu going to change the fuel timing ect… since it is a whole differnt engine withe the vtec chip?