i found a good deal on a 99 b16 from a wrecked si and was wonderin if there was anything that i need too know and what stuff does work adn what doesnt
thanks
chris

 

way too broad of questions, narrow it down.

 

hmmm let me see i have a 92cx with a d16z6 swapped in at the moment i am looking to purchase a 99 civic si motor (b16) and was wonderin if i had to get my p28 chipped or will the civic si ecu work and what about the obd2 how is that bypassed or whatever is done to it? also i have the vtec wires ran for the d16 will i also have to run knock sensor wires?
thanks
chris

 

chip the P28, its cheap and it will work great. yes u will need to add a KS wire. u will either need to change to OBD1 injectors or change the injector clips to OBD2. everything else should hook right up w/ no probs. the easiest way to do this is to just buy a 96-98 GSR engine harness. it has all the sensors and everything should reach the B16s locations w/ no probs. i got mine for a little over $100.

 

...ok, your P28 info is contradictive. A P28 in stock form does NOT look for a KS. Getting the P28 reprogrammed (w/ mugen program) will also NOT look for a knock sensor as well.

01VaS2K:
If you get the Si engine, see if you can get the Si engines wire harness as well. I believe the Si coupe has a 2 piece (OBD2) engine harness like your EG civic. The harness will plug into your OBD1 main harness plugs (at passengerside shock tower). When using an OBD2 engine harness in an OBD1 vehicle, you will have a couple plugs left unplugged. which is ok. Those extra plugs are meant for OBD2 and should just be left dormant/unplugged/whatever...it will not affect performance since you will be retaining an OBD1 ecu to power this engine. You won't be able to use the Si coupe ECU, because its OBD2 and the ecu plugs are shaped differently and will not plug into your OBD1 vehicle unless you get an ecu jumper harness which then would allow you to use the OBD2/Si ecu. But that ecu sucks and it's highly advised to use your OBD1 ecu.

 

ur right katman, i think i was typing too fast. god, i just got my P28 so i already knew that there was no KS. the OBD1 P72 and P30s however do have KS. sorry for the misinformation.
QUOTE]
01VaS2K:
If you get the Si engine, see if you can get the Si engines wire harness as well. I believe the Si coupe has a 2 piece (OBD2) engine harness like your EG civic. The harness will plug into your OBD1 main harness plugs (at passengerside shock tower). [/QUOTE]
now ur statement is wrong about the SI harness. the SI harness is NOT a 2 piece but a 1 piece. it has 3 plugs on the drivers side and the harness then attaches to the sensors on the motor then go all the way back to the ECU, therefor it will NOT work in the 92-95 civics unless u wanted to do alot of cuttin and butt splicing.

 

wont a 94-95 del sol ecu obd I will work? cant he use the stock 99-00 si wiring harness but use the obd I del sol ecu??? everything else should work mounts, shiftlinkage etc...?

 

i have heard that the plugs are different for the del sol ecu's iam not sure if this is true prob not but i was just thinkin about re-chipping my p28 to dohc specs all teh other stuff should work, linkeages, axels, mounts etc you know that.....(champ)hehe
i amjust worrying about the wiring harness electronics are my weakness
thanks for the info
chris

 

ah ok..
well then, you should look for a 96+ GSR or 97-98 ITR engine harness (2 piece), since the 99+ Si harness is a 1-piece which won't work.

I'm advising you to get an OBD2 VTEC engine harness so you don't have to waste time or money on converting back to OBD1, since the OBD2 electronics/ignition parts can be used in an OBD1 equipped car. So if you get the harness, you'll be 90% complete...all that would be left is getting the ecu reprogrammed.

good luck..

 

what reprogram would you suggest i do on a stock b16 motor i will mod it down the line?
thanks
chris

 

Well, the Mugen program IS a power making program, thing is, it sounds like you wanna keep your engine almost 100% stock, right?....the mugen program will just kill your gas mileage. You prolly don't want that. I do have a few DOHC VTEC programs that have the KS disabled, and will power a DOHC VTEC engine...yet not dump as much fuel as the mugen program. Hit me up privately if you'd like to do this. thanksh...

 

i am interested in the mugen program but what is the redline i will be installing stiffer springs, tit. retainers and prob itr cams, soon after the swap so the mugen is safe to run with the stock setup
thanks
chris

 

there r many variations of the mugen program. typically the P28 mugen program redlines at 8800 or 9500. most programmers can change that upon request. u wont need titanium retainers with ITR cams, stock ITR redline is 8600, my ITR ECU redlines at 8700. u will only need ITR intake springs, the ITR exhaust springs r the same as the intake springs on the VTEC motors. just move those springs to the exhaust side and get new ITR intake springs and u will b fine. remember even with a B16 REVS kill motors. most cams including ITRs only make good power to around 8k so being able to rev high isnt goin to really do u any good, specially since the torque curve usually falls off after 7k or so. the best reason to own a ECU that allows u to rev higher is so u can shift at stock redline w/o havin to worry about hittin rev limiter to slow u down.

 

9000 redline should suffice with R cams. Ti retainers aren't a bad upgrade even though your stock retainers can handle up to about 9500. Relieving weight from the valvetrain isn't bad to do at all. Lemme know if you need an ECU upgrade, I can provide that service to you. Yes, the mugen program is safe to run....only downside is gas mileage.