I'm really liking the idea of a JDM D15B swap into my 91 CRX SI.

Its a direct match of a D16Z6 and bolts right in. I already have the P28 and getting pre built wiring harness for the Vtec is easy.

Questions:

1. What makes the D15B a stage 3 Vtec?
2. Are the JDM D15B's stage 3 Vtec?
3. Does the D15B run on regular gas and get better milage than
my stock SI motor?
4. Since the D15B is JDM it will not get past Calif smog? Can I go to a
ref and pass it through?
5. Who is the master honda Hybrid swapper in SoCal?
I'm going to a garage for this swap and want it done right.

I just need 130hp....Old Guys Rule.....

 

I just did a jdm d15B in my 91 HF and it is not a 3 stage vtec. I kept the HF tranny so when I keep the revs low, it gets pretty much the same mileage. I would imagine the effect would be similar with the SI tranny, mileage should be close.

I also have a d16y8 in my 90 SI and the d15B seems to pull much harder in the higher rpms (5-8) but this is most likely due to the weight differences, not to mention the hf has 13 inch wheels where my SI has 16s.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by craigie &raquo;</TD></TR><TR><TD CLASS="quote">I'm really liking the idea of a JDM D15B swap into my 91 CRX SI.

Its a direct match of a D16Z6 and bolts right in. I already have the P28 and getting pre built wiring harness for the Vtec is easy.

Questions:

1. What makes the D15B a stage 3 Vtec?
2. Are the JDM D15B's stage 3 Vtec?
3. Does the D15B run on regular gas and get better milage than
my stock SI motor?
4. Since the D15B is JDM it will not get past Calif smog? Can I go to a
ref and pass it through?
5. Who is the master honda Hybrid swapper in SoCal?
I'm going to a garage for this swap and want it done right.

I just need 130hp....Old Guys Rule.....



</TD></TR></TABLE>

1./2 not all jdm d15's are vtec
3. yes it runs on regular gas but smoother and better on prem.
4. if you blow all the workers at the ref station u might have a chance of it passing smog.
5 couldnt tell ya

 

why does everything always seem to come in "stages" to the tuning world? What in the heck is stage 3 vtec?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by crexer &raquo;</TD></TR><TR><TD CLASS="quote">why does everything always seem to come in "stages" to the tuning world? What in the heck is stage 3 vtec?</TD></TR></TABLE>

there is in fact a d15 vtec that has something called 3 stage vtec...I recently read about them when I was looking up info on the d15

 

Thanks, good info.

I liked this write up on the D15B but it doesn't explain the technical differences with the three levels of Vtec on the D15B. http://asia.vtec.net/article/d15b/

The three different Vtec's:
1. VTEC-E
2. VTEC
3. 3-stage VTEC

Are the different levels of Vtec gained from different ECU's?

Is there a JDM 3-stage Vtec? Or can I buy any JDM D15B Vtec and convert it
to 3-stage with the right ECU?

Will likely get my motor through hmotorsonline but am researching this guy first.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by craigie &raquo;</TD></TR><TR><TD CLASS="quote">Thanks, good info.

I liked this write up on the D15B but it doesn't explain the technical differences with the three levels of Vtec on the D15B. http://asia.vtec.net/article/d15b/

The three different Vtec's:
1. VTEC-E
2. VTEC
3. 3-stage VTEC

Are the different levels of Vtec gained from different ECU's?

Is there a JDM 3-stage Vtec? Or can I buy any JDM D15B Vtec and convert it
to 3-stage with the right ECU?

Will likely get my motor through hmotorsonline but am researching this guy first.</TD></TR></TABLE>

Same ecu for all the vtec levels. The obd2 jdm d15b is three stage. Expensive and hard to find generally.

 

Oh yeah, vtec-e shuts off four of the intake valves making it run leaner get awesome gas mileage until about 3k rpm, then up to 5500 or whatev it's normal, then it hit normal vtec for power.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by craigie &raquo;</TD></TR><TR><TD CLASS="quote">Thanks, good info.

I liked this write up on the D15B but it doesn't explain the technical differences with the three levels of Vtec on the D15B. http://asia.vtec.net/article/d15b/

The three different Vtec's:
1. VTEC-E
2. VTEC
3. 3-stage VTEC

Are the different levels of Vtec gained from different ECU's?

Is there a JDM 3-stage Vtec? Or can I buy any JDM D15B Vtec and convert it
to 3-stage with the right ECU?

Will likely get my motor through hmotorsonline but am researching this guy first.</TD></TR></TABLE>
the 3 stage vtec motors are quite rare and with that said you have to use the ecu that controls that motor. as far as i know you cant convert it into that there is a difference with the head and selanoid

 

I'm INterested In Doing a JDM D15B in my Rex also. I Blew my motor so I figured I pimp another SOHC. Wuts the REAL difference between the 2 stage and 3 stage? I'm actually pretty new about this Motor. I'm normally a B-series guy but when your Reppresentin This Sticker on the back of your car......



You gotta represent! =]

Is there anyone here with a D15B that has Videos?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by SVOboy &raquo;</TD></TR><TR><TD CLASS="quote">Oh yeah, vtec-e shuts off four of the intake valves making it run leaner get awesome gas mileage until about 3k rpm, then up to 5500 or whatev it's normal, then it hit normal vtec for power.</TD></TR></TABLE>

It doesn't actually "shut off" four intake valves at low RPM. The valves still open, just not as much. If they didn't open at all gas would pool up on top of the valve and when it did open you would have problems.

I used to have a '92 VX which comes with the VTEC-E engine. It was horribly gutless, even at high RPM it didn't have much power. But, it got excellent gas milage!

 

I put that motor in my last ef and it was def a good move. put out a lot of power. the only thing that i had to do with it was custom a motor mount. the one by the driver fender was offset farther then i needed, you might come into that problem too. heres a pic of how mine looked.

 

HOw'd you Solve your Motor Mount Problem?

 

welded another peice of metal to the mount and drilled two holes for the rods to go through. it was just like a inch from not working with the stock mount before custom.

 

Hmmm I'll have to see when i get the Motor... Is it really Nessesary?

 

your suppose to take off your old motor mount off your old motor and swap it and put it on the d15b for it to work perfectly no need to custom make anything

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by ef9typer &raquo;</TD></TR><TR><TD CLASS="quote">welded another peice of metal to the mount and drilled two holes for the rods to go through. it was just like a inch from not working with the stock mount before custom.</TD></TR></TABLE>

like ur avatar....

was ur mount really close to the belt? what i did just cut 1/2 an inch of metal so it will clear the belt...

and gor MR. creigi.... so ur going to run obd-1....ur motor is the same regular vtec..
the vx motor is the 3 stage...
and for shop.....autolink does good work....do some research on shops around ur are....or better go to a Meet and talk to peeps there...they might have a good place to do a swap...

 

I don't wanna try to confuse anyone if I do, but from what I know VTEC-E and the 3 stage VTEC are the same thing and that they call it VTEC-E because the E stands for economy and the 3 stage because before about 3000 rpm's it runs on 12 valves (2 exhaust and 1 intake per cylinder) and then inbetween 3000 and whenever VTEC usually engages it runs like a normal d-series before vtec then obviously it has VTEC as well. If I'm wrong about anything someone please correct me because I have been thinking about this swap alot.