jdm d15b vtec question

[outofstep]

im getting ready to put in one of those jdm d15b vtec motors, and im gonna get an 90-91 si tranny, i was gonna get a 90-91 ecu, then relized those years didnt have vtec... so i was wondering what would be the best ecu to use?

 

[xx90vtecxx]

probably a pwo

 

[pisetup]

Originally posted by outofstep
im getting ready to put in one of those jdm d15b vtec motors, and im gonna get an 90-91 si tranny, i was gonna get a 90-91 ecu, then relized those years didnt have vtec... so i was wondering what would be the best ecu to use?

The best ECU to use is the ECU that originally ran the motor. I forgot what it is called..

 

[outofstep]

ok well actually that stock ecu is set for 3 stage vtec, so its like
1/3 then 2/3 then full vtec and id rather have it kick in full, thats more of an economy feature, i gonna go with a si ecu and just get an apexi vafc or chip my ecu with the mapping i need, thanks this was actually an older post lol

 

[slyw/fbpsi]

Originally posted by outofstep
ok well actually that stock ecu is set for 3 stage vtec, so its like
1/3 then 2/3 then full vtec and id rather have it kick in full, thats more of an economy feature, i gonna go with a si ecu and just get an apexi vafc or chip my ecu with the mapping i need, thanks this was actually an older post lol

That is not correct, the stock p08 ecu from the 92-95 civic vti with the d15b vtec does not have a 3-stage vtec. That is only in the 96-98 models. If you are going odb1 the use can use the stock p08 ecu that comes with that motor, becuase it doesn't require switching over to a 4-wire o2 sensor, or you can use a p28 but, you would have to get a 4-wire o2 sensor. If you are staying odb0 then, you need the si ecu, or zc ecu, and vafc or msd switch. I converted over to odb1 in my 91 dx with the p08 ecu, and odb0-> odb1 convertion harness.

 

[Tom]

3 stage, that's what i tried to tell him.

 

[slyw/fbpsi]

the stock ecu for the d15b vtec from 92-95 doesn't have 3stage though, only the 96-98.

 

[Tom]

but isn't 96 and newer vehicles all 1.6 ltrs or are there 1.5 ltrs in teh us market.

 

[slyw/fbpsi]

no, they still have the 1.6 and the 1.5 in the JDM market, the d15b vtec was never brought to the us market.

 

[outofstep]

yea and i can get it for $425 shipped with 30-35k lol

 

[slyw/fbpsi]

mine was sopposed to be around 35k but when it got here the sticker has 89 or 91 km, which is around 53- 55k miles on it.

 

[h22a4civic]

Originally posted by outofstep
im getting ready to put in one of those jdm d15b vtec motors, and im gonna get an 90-91 si tranny, i was gonna get a 90-91 ecu, then relized those years didnt have vtec... so i was wondering what would be the best ecu to use?

if the ecu does not come with the motor you can use on of of a 94-99 civic ex, works fine, the only code it will throw out is the o2 sensor

 

[slyw/fbpsi]

a 96-99 ecu would be odb2 so he would have to convert from 0db0->odb2 to use those ecus, and odb0->odb1 to use the 92-95 p28.

 

[h22a4civic]

its the ECU not the HARNESS, at least i didnt ned to convert anything!!!!!!!!!!!!!!!!!!!!!!

 

[slyw/fbpsi]

if you have a 88-91 car then the HARNESS isn't going to plug into a 92-00 ECU without any modifications.

 

[Tom]

werd.

 

[h22a4civic]

nummm thats funn i been doin this for years and mine did, but normally we hook up vtec to the tach!!!!!!!!!!!!!

 

[slyw/fbpsi]

so you're trying to tell me that a p2p or a p28/p08 ecu will plug into your stock 88-91 harness without no modifications at all? looking at this pic I find it hard to believe

OBD IIb (left 3 plugs used)



OBD II ECU



OBD I ECU



OBD 0 (JDM PR3 and PWO)

respectively

 

[pisetup]

Here's a JDM D15 VTEC question. If you wanted to replace all the seals on the engine, where would one buy them???

 

[Tom]

from honda, its still teh same motor as a U.S. 1.6 vtec, just its a 1.5 vtec.