i just recently bought a civic coupe with a gsr swap in it. the car was a showcar so the engine was stock but for some reason the guy has a p28 ecu in it. would the p28 make the car slowwer than the p72 bc when vtec kicks in it doesnt kick u hardlike a gsr should but the motor is still fast just not gsr fast. could it b the ecu or what. its an obd1 cvar with an 0bd2 motor with obd1 ecu and harness. help i just wantto know if the reason vtec isnt kicking hard is because the p28 ecu or is the motor not as good as i thought.

 

I acn assure you it probably doesn't have anything to do with the ecu--plus GSR's aren't very fast and vtak never really kicks all that hard. There are some things that can make vtak a little sluggish though and one of them is cylinder pressure--run a compression check on the motor and make sure it looks good if gsr motors lose compression they slow up a lot. Just one thing for you to check.

 

how can u say that the gsr arnt very fast. dood they run in the 14s stock they are one of hondas best motors. and the compression is good. the gsr has a p72 ecu and this has a p28 so most people tell me that is y bc its not redlining high and the vtec is getting less air fuel because the ecu is for a smaller motor. i just dont get how u say the gsr arnt that fast. the only bigger motor is the h22 and my gsr as is smoked the h22. i just posted this to see wat other people say about the ecu problem not to have people try and hate on the gsr

 

down boy--if you read my post you'll see that I was trying to help--and never did the GSRs run 14's stock---

I try to help and I get a bunch of riceboy bullshit

unsubscribed

 

You should pm mtber

And I agree with you. I know plently of people who have run in the 14's with a near stock gsr swap.

 

i have the same problem

 

y dont u call the guy u bought the car from and ask him y it has p28 ecu?? second open up the ecu and see if its chip'ed r something

 

yea 14's certainly are plausible for both an eg and ef chassis. did you forget about the b18c5? its not larger but it sure as hell is a dick ton quicker then your gsr. and if you had a properly running h22 in a eg chassis, and then your gsr in that same eg chassis, the h22 is going to destroy the gsr. regardless if its a usdm or jdm swap. h22 in an eg makes a mid-high 13 second car. if its a jdm h22 or jdm h22 type s then it becomes a low 13 second car.

That aside, you can run a p28 completely fine with your gsr so long as the p28 has been chipped with a gsr map. at this point its hard to say what is actually on the ecu. only real way you could test is swap a stock obd1 gsr ecu in there and see if anything changes. do you have any cel's on? if it were a stock p28 basemap running a gsr, you would certainly have some major issues, including cel's i would have to imagine.

 

yeah i know the gsr isnt the best motor honda has obviously the type r is better but i was saying h22 in a coupe isnt that much faster than a gsr. i know this bc my buddy has a h22 coupe king tuned and its not that much faster than my buddys gsr. but anyways im not trying to argue i just want some help the swap i have has the p28 in it because the ecu the dood got with the swap was an obd2 ecu bc the swap is a 97 in a 94 obd1 coupe so thats y the p28 is in there and not the p72. the p28 is virgin and the check engine light is on. all i want to know is would vtec kick better with the p72 or should i not even bother wasting my cash that i dont have and just run the p28 until i can afford to chip the p28 or just save money and get a obd1 p72

 

i dunno about vtec "kicking" harder.. .. but it should run a hell of a lot better with the correct ecu. the stock p28 doesnt even come close to having the proper fuel curves and timing for a gsr

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by D16SiHatch &raquo;</TD></TR><TR><TD CLASS="quote"> the stock p28 doesnt even come close to having the proper fuel curves and timing for a gsr</TD></TR></TABLE>
and no control of the iab

 

just chip the p28 and have it tuned its not hard just spen a lil money n it will b worth it

 

i knew there was somethin else but i couldnt think of that 3 letter acronym at the time lol. and yea either chip it or get the stock ecu. whichever is cheaper

 

gsrs arent fast? they are for stock motor with bolt ons.. my **** hauls as in a civic ek with only bolt ons.. you would be surprised.. anyways try getting a different ecu for you car.. I have a jdm p72 obd2a ecu for sale. pm me for details if you need one. im in socal

 

well i have a p72 ecu but it is obd2. the harness in the car is obd1 bc the civic is a 94. idk why the guy didnt do the obd2 conversion but i went to king motorsports and they said if i buya obd1 to obd2 conversion harness it wouldnt work and it would throw a bunch of codes. is that true or are they trying to get me to buy a bunch of extra ****

 

also i dont wantto chip this ecu because i dont want to spend the money to chip it bc i decided to throw the gsr in my 98 coupe then i can use the obd2 p72 but for now im gona use ur guys advice and get the obd1 p72 for now.thanks 2 everyones that helped me out

 

what chipshould ido for my obd2 p72 in my gsr. ive been told that i shold use the hondatasystem but which one should i get for obd2

 

you cant chip obd2. you need to go obd1 besides the car your using right now with teh gsr motor is obd1. I say you find an obd1 ecu but you already have one the p28. The p28 can be chipped!

 

but the gsr motor is obd2 the motor itself is 97. so when i put it in my coupe the car and motor will b obd2 so i should just use stock obd2 ecu when i do the swap

 

yeah you should but if you plann on chipping your ecu then you need to go obd1. just buy a conversion harness thats all..

 

how do you know the p28 u have now isnt chipped and why wouldnt you chip the p28 if its not it will be cheaper than you buying a p72 with hondata and a chipped p28 can be setup to run just like a stock p72 and you would never know the difference

 

i have a 92 vx hatch with a 98 gsr motor, i'm running a chip p28 ecu for now because i haven't yet ran the knock sensor and o2 sensor, the obd1 chipped p28 dosen't have knock senor so i won't have a cel for the knock sensor just for the o2 sensor, so in your case i'm guessing that the guy hasn't yet ran the knock sensor yet that's why he's using a p28..

 

correct me if im wrong but i thought vtec doesnt kick in when the cel is on, maybe thats your problem

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by waterfordtuners &raquo;</TD></TR><TR><TD CLASS="quote">yeah i know the gsr isnt the best motor honda has obviously the type r is better but i was saying h22 in a coupe isnt that much faster than a gsr. i know this bc my buddy has a h22 coupe king tuned and its not that much faster than my buddys gsr. but anyways im not trying to argue i just want some help the swap i have has the p28 in it because the ecu the dood got with the swap was an obd2 ecu bc the swap is a 97 in a 94 obd1 coupe so thats y the p28 is in there and not the p72. the p28 is virgin and the check engine light is on. all i want to know is would vtec kick better with the p72 or should i not even bother wasting my cash that i dont have and just run the p28 until i can afford to chip the p28 or just save money and get a obd1 p72</TD></TR></TABLE>

obviously your buddies motor is [freak]ed. because i had a b16a swap for a bit and could take integra gsr's down the track by a lil bit. i know there is a difference in an integra and civic weight wise but nothing to crazy.

in the 1/8th mile my untuned i/h/e h22 civic is runing 9.1's at 82 mph on street tires spinning all the way through second. that trap speed is good for a mid to low 8 second in the 1/8th mile.

i would love to see an untuned i/h/e gsr swapped civic pull that off........

either get a chipped p28 or come up with an obd1 p72

 

the only time vtec doesnt work is if your knocksensor, vtec pressure switch, vtec solenoid is a throwing a code. and also if your vss isnt working. otherwise any other cel light will let vtec kick in.