an2ny888

i saw both engines in a junkyard today, i know they both make 130 hp but the 3 stage makes like .1 kg more torque ( like i'm going to feel that). which is the better engine, performance wise? i don't really care about the increased economy, which i think is the main feature of the 3 stage

Ricey McRicerton

I would say neither unless you are getting a superb deal on them. Full z6 swaps can be found from 300-500 bucks. Just my opinion though, I don't particularly want a motor from Japan where I honestly have no idea how many miles are on it.

Jim Truett

The D15B with the 2 stage VTEC would be easier to run, considering it works well with a USDM P28 ECU. If you can get the proper ECU for the three stage D15B, it would be a good engine as well. The 2 stage motor is basically a VX block with a Z6 head, and the cam is more agressive. I agree with Ricey about the JDM engines. My friend got his D15 from the same importer I got mine from. His looked brand new when we disassembled it. Mine looked like the oil was never changed, and was varnished to hell. I had to fully rebuild it. It wasn't much of a loss though. They were only $250.

Sketch_hs

the 3 stage vtec is a great engine.. 130hp and 54mpg!

HumanResource

54 mpg no joke?
Wow
They use OBD-2 elctronics-somthing I'm not down with, but for 54 mpg I might reconsider...

Jim Truett

http://asia.vtec.net/article/d15b/

The 3 stage motor was available in '95, so I would assume there are OBD-1 ECUs for it.

HumanResource

But then again they'd release the NEW civic a few months earlier in Japan than in US, I'm sure it's OBD-2

Jim Truett

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by HumanResource &raquo;</TD></TR><TR><TD CLASS="quote">But then again they'd release the NEW civic a few months earlier in Japan than in US, I'm sure it's OBD-2</TD></TR></TABLE>

There may be a transition model though. The EG pictured here is a '95 with a three stage D15B:


It has the OBD-1 intake manifold on it. The OBD-2 standard is federally mandated by the US, so I would think manufacturers would release vehicles fairly close to our required implementation of the new elecrtonics.

kingSfit

D15? ISNT THAT A CX ENGINE? HAHA

Ricey McRicerton

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Bunz &raquo;</TD></TR><TR><TD CLASS="quote">D15? ISNT THAT A CX ENGINE? HAHA</TD></TR></TABLE>

Isnt that a caps lock key on your keyboard??

Jim Truett

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Bunz &raquo;</TD></TR><TR><TD CLASS="quote">D15? ISNT THAT A CX ENGINE? HAHA</TD></TR></TABLE>

You're kidding, right? I sure hope so.

TorganFM

If you want a 2 stage JDM D15B on the east coast there's a place in Manassas, VA called Noyan USA. Google the name. I was quoted at $300 for a D15B and transmission (non-LSD of course). Check out tha JDM y0!

jdmsiR20

performance wise, the plain ol jdm d15b is great...

for economy, the 3 stage is your choice

Ricey McRicerton

3 stage vtec goes something like this.

It runs off of 2 lobes below 2500 rpm. Over 2500 it runs on the smaller 4 lobes and over 5000 it runs on the high lobes. I think that's how it works. It's like normal VTEC + VTEC-E.

Jim Truett

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Ricey McRicerton &raquo;</TD></TR><TR><TD CLASS="quote">3 stage vtec goes something like this.

It runs off of 2 lobes below 2500 rpm. Over 2500 it runs on the smaller 4 lobes and over 5000 it runs on the high lobes. I think that's how it works. It's like normal VTEC + VTEC-E.</TD></TR></TABLE>

I think it runs off of 12 valves under 2500 rpm. Opens up the 4 auxillary intake valves over 2500 rpm. At 5000 + it switches over to the performance lobes.

Jim Truett

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Jim Truett &raquo;</TD></TR><TR><TD CLASS="quote">

I think it runs off of 12 valves under 2500 rpm. Opens up the 4 auxillary intake valves over 2500 rpm. At 5000 + it switches over to the performance lobes.</TD></TR></TABLE>

Close, but not exact. Here is a quote:

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote &raquo;</TD></TR><TR><TD CLASS="quote">The 3-stage VTEC engine runs in 12-valve mode up to around 3000rpm. In this range, running in ideal conditions will activate the 'lean-burn' mode, where air-fuel ratios as high as 20:1 can be used to take advantage of the intake swirl induced by the 12-valve operation. This lean-burn mode is what makes the 30km/l mileage (for constant 60kmh speed) possible. A green 'ECONO' LED lights up on the dash when lean-burn mode is engaged.

From around 3000rpm up to about 6000rpm, the first VTEC actuator switch engages and the previously inactive intake valve now goes into operation. The engine now runs in 16-valve mode behaves just like any of Honda's highly spec'ed 16valve PGM-Fi engines. After 6000rpm the second VTEC actuator switch engages the wild cam/rocker arm pair for the intake valves. This switches the engine into the wild-cam mode where it goes bonkers delivering 130ps at 7000rpm
</TD></TR></TABLE>

Ricey McRicerton

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Jim Truett &raquo;</TD></TR><TR><TD CLASS="quote">

I think it runs off of 12 valves under 2500 rpm. Opens up the 4 auxillary intake valves over 2500 rpm. At 5000 + it switches over to the performance lobes.</TD></TR></TABLE>

Damn that's what I meant. Had a long day and am not explaining things well. Thanks man!

EMOmob

im really happy about my JDM Vti d15b motor on my Eg....

jdmsiR20

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by quote &raquo;</TD></TR><TR><TD CLASS="quote">From around 3000rpm up to about 6000rpm, the first VTEC actuator switch engages and the previously inactive intake valve now goes into operation. The engine now runs in 16-valve mode behaves just like any of Honda's highly spec'ed 16valve PGM-Fi engines. After 6000rpm the second VTEC actuator switch engages the wild cam/rocker arm pair for the intake valves. This switches the engine into the wild-cam mode where it goes bonkers delivering 130ps at 7000rpm

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


so if vtec past 6000 is the same as the normal jdm d15b, is the performance overall the same?

performance: jdm d15b vtec = jdm d15b 3stage vtec??

also, wouldn't the ecu that controls the functions completely differ everything?

drewbie*

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by TorganFM &raquo;</TD></TR><TR><TD CLASS="quote">If you want a 2 stage JDM D15B on the east coast there's a place in Manassas, VA called Noyan USA. Google the name. I was quoted at $300 for a D15B and transmission (non-LSD of course). Check out tha JDM y0!</TD></TR></TABLE>

Damn thats a deal... too bad im in cali

0ptimus prime

^ i know, i'm looking to put in a d15b as well, but 435 just for the longblock at HMOTORS is a little steep. SOMEBODY has to have a better deal somewhere in so cal.

goodbyegti

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by jdmsiR20 &raquo;</TD></TR><TR><TD CLASS="quote">performance wise, the plain ol jdm d15b is great...

For economy, the 3 stage is your choice</TD></TR></TABLE>

The 92-95 jdm d15b is also great for economy, i got 43.1mpg on a recent trip through some mountains with a heavy load with the occasional use of VTEC. I'm pretty sure our gallons are different sizes over here but for comparision a VTi (B16) civic gets about 32-4mpg with economical driving..never had any problems from it either, is fast(ish) when you want and economical when you're skint..

SOHC_MShue

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Bunz &raquo;</TD></TR><TR><TD CLASS="quote">D15? ISNT THAT A CX ENGINE? HAHA</TD></TR></TABLE>
what?? Can't you see the vtec solenoid?

slywfbpsi

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Ricey McRicerton &raquo;</TD></TR><TR><TD CLASS="quote">I would say neither unless you are getting a superb deal on them. Full z6 swaps can be found from 300-500 bucks. Just my opinion though, I don't particularly want a motor from Japan where I honestly have no idea how many miles are on it. </TD></TR></TABLE>My d15b vtec came with a stamp on it with the year, mileage, and vehicle model. It said 95000 kilometers which is about 59,030. I doubt I would be able to find a z6 with the little mileage.