Civic EG

So, I just got my first car, and im building it, it's a 95 civic SI hb with a D15B, im just trying to find out if the D15B vtec will wire into the stock SI computer with no problems.


Also, if anyone knows what kind of HP i'll be looking at with D15B, Cold air intake, header, and new exhaust, it would be appreciated.

should be a plug in and play type harness. and 140 for hp

JDM motors don't have VTEC oil pressure sensors so you will either need to swap the oil pressure sensor, the entire VTEC solenoid, or join the VTEC pressure sensor wire to the VTEC wire.

You will also need a vacuum T to put on your fpr vacuum hose so you can run it to your purge control solenoid. Then find a way to mount your purge control solenoid. Most people use a zip tie. Or you can swap to a USDM D16Z6 intake manifold.

Other than that the Z6 ECU will run the motor perfectly. The motors are virtually identical except the D15B has slight differences in the block and the cam giving it a slight boost over the Z6.

Wheel horsepower realistically will be just above 100hp. I/H/E really don't give you that much hp... and they don't give it all to you right at the peak hp.

not to challenge you suspendedhatch
buttttt my jdm d15b has a vtec pressure switch
and i have run it without the purge controll valve with no problems and no cels
so how important is that purge controll valve?

Challenge away. It doesn't bother me. We should always try to have the best info and not worry about stepping on each others toes.

Purge control solenoid is very easy to hook up. It's worth it just to avoid the rotten smell penetrating into the cabin and to get the 3 or so mpg.

yeah just saw another jdm d15b with a vtec solenoid so i have no idea whats going on there
as for the purge controll i have proken two of them and the dealer wants 167 bucks for it soo im all set haha
plus i already get like 38 mpg highway so im prefectely happy

do you by any chance have a pic of this purge valve? cause when i hit vtec and rail my car i get a slight weird exhaust smell in the cabin...im wondering if my purge thing isnt hooked up?

suspendedHatch wrote:JDM motors don't have VTEC oil pressure sensors so you will either need to swap the oil pressure sensor, the entire VTEC solenoid, or join the VTEC pressure sensor wire to the VTEC wire.

i have seen then with or with out two of my friends ordered h22's and another one ordered a d15b none came with oil press switches, but were threaded and just had a small round head bolt in them, then anoter boy ordered a itr swap and it wasnt even threaded for an oil pressure switch, it was just solid cast there...

but i have seen other people order a jdm gsr or b16 and they have switches in them...

eg84dr wrote:yeah just saw another jdm d15b with a vtec solenoid so i have no idea whats going on there
as for the purge controll i have proken two of them and the dealer wants 167 bucks for it soo im all set haha
plus i already get like 38 mpg highway so im prefectely happy

i didnt have a purge on my hatch when i had a ls in it and i was knocking off 30+ mpg in it and that was a mix of highway and city

Why would you go to the dealer for something that is so common and so cheap you can just pocket it at the junkyard?

So effortless to have on there it really is pure laziness not to. And I know I'm the only one here with a conscience but that's our environment... go visit Tijuana if you want to see what it's like when no one gives a shit about air quality.

Plus it kind of runs counter to the Honda philosophy. Honda = smart power. Domestic = big and sloppy.

All the JDM motors I've seen have had no VTEC pressure switch but I don't doubt you guys... nor do I understand the inconsistency.

good point about the dealer it was before i knew anything about cars so i might just go get one from the junkyard along with a charcole canister