eg6ajk

so you have seen many pics and many different write ups. I personally owned 6+ different swap combinations in my EG from the D15B7 to B20B, and can at least comment a little on the potential of the motor which I am very impressed. It revs so freely nothing like any other d-series you drive, more like b-series. low/mid range torque on the 1.5l can be said to be more then enough and somewhat comparable to the d16z6. bang for the buck its one of the nicer deals especially if you score the LSD tranny.

Tranny
My swap came with the optional LSD tranny found on the motor (there were auto VTi LSD equipped trannies as well - have seen few in person). Gear ratios are identical to the USDM/Can Si/EX equipped with D16Z6 (5spd cars) and so are the cases. To make sure you have Vti/VXi tranny check for P20/B000 stamp around the oil filler plug. LSD tranny will usually have stamp on LSD or RSD in ink.
installation of the SRR FD will not work with the LSD tranny - LSD uses a different size ring along with 12 bolt mounting point.
gear ratios go as follows:
1 - 3.250
2 - 1.900
3 - 1.250
4 - 0.909
5 - 0.750
R - 3.153
FD - 4.250

Engine
Motor itself uses a P08 block which is shared with USDM D15Z1 (VX) and head is shared with the D16Z6 (si). Many are under the impression that it has a dual vtec solenoids(ala 3-stage vtec) but this is not the case as the 3-stage vtec is only found on 95.6+ JDM EK Civic chassis. The D15B is just like the D16Z6 as far as head/intake/solenoid and overal valvetrain. Camshaft itself is more aggressive then the one found on the y8/z6 motors (almost comparable to zex 59300). D15B is able to run the Z6/Y8 cams with some timing correction thus the timing gun and cam gear maybe required for the optimum performance.

ECU
ECU is a 'small case' P08 (this will run with single wire 02 as thats what VTi/VXi came with). VTEC point is at 4800-5200 rpm (4800 @ WOT), while the rev limit (fuel cut off) is at around 7350 rpm. P08 has fairly leaner maps with more timing advance then the P28/D16Z6 ecu A USDM p28 can be used longest 4-wire 02 is used and you don't mind the slight performance decrease. But no worries it can be easily chipped to P08 specs.

Other
Motor specs:
D15B (not to be confused with the JDM VX/ETi D15B motor which has the same stamp but differnt valvetrain/intake and makes good 35hp less)
1,493cc / 75.0~84.5
Compression 9.3:1
Rods are 137mm (simliar in sized to the d16z6)
R/S ratio : 1.62 (just like the b17a)








Modified by eg6ajk at 8:45 AM 4/29/2004

JV

Thanks for the info...

Ivan

did you swap your motor again?

eg6ajk

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Ivan &raquo;</TD></TR><TR><TD CLASS="quote">did you swap your motor again? </TD></TR></TABLE>

yes I did

Ivan

swap *****

Ricey McRicerton

So how would you compare this tranny to the USDM si/ex tranny???

UnrealSpeed

So between the D16Z6 and D15B which would u pick?

hatchback19

If you ever decide to sell the tranny, or know where I can get one look me up! I'd appreciate it!

Cereal_Killer

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by eg6ajk &raquo;</TD></TR><TR><TD CLASS="quote">A USDM p28 can be used longest 4-wire 02 is used and you don't mind the slight performance decrease. But no worries it can be easily chipped to P08 specs. </TD></TR></TABLE>

so can the chipped p28 to p08spec ecu use the 4 wire 02, or will that have to be swapped to the 2 wire?

also i noticed you are not running a/c, is there a reason? i would like to do this swap to my 4dr in the near future and would like to retain my a/c.

sorry if these have been answered before.

smnowell

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by NotecEG8 &raquo;</TD></TR><TR><TD CLASS="quote">

so can the chipped p28 to p08spec ecu use the 4 wire 02, or will that have to be swapped to the 2 wire?

also i noticed you are not running a/c, is there a reason? i would like to do this swap to my 4dr in the near future and would like to retain my a/c.

sorry if these have been answered before.</TD></TR></TABLE>

I am sure the removal of his A/C was completely voluntary...

BauleyCivic

i need to get that transmission...i basically built that motor (d15 block with d16 head...basically same motor with higher compression and less-aggressive cam) and haven't been too impressed yet...i still have the long *** LX transmission...so we'll see

Ivan

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by BauleyCivic &raquo;</TD></TR><TR><TD CLASS="quote">i need to get that transmission...i basically built that motor (d15 block with d16 head...basically same motor with higher compression and less-aggressive cam) and haven't been too impressed yet...i still have the long *** LX transmission...so we'll see</TD></TR></TABLE>actually your motor and his are very different.

South Bay Surfer

how aggressive is the sound/feeling of vtec crossover in this motor? is it comparable to the b-series?

eg6turbo

YEAH........D15b VTEC REPRESENTING!!!!!!!!...my **** owns lol....

EL-Driver

I wonder though...

Is the auto tranny with LSD compatable with the D16Y8???

How commone is the auto tranny with LSD...

I would be very interested in one of those tranny's...

SuicideSlide

bump

liam821

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

Im going on swap #9 in my car....not sure if thats a good thing or not.

liam

RStoR

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Ricey McRicerton &raquo;</TD></TR><TR><TD CLASS="quote">So how would you compare this tranny to the USDM si/ex tranny???</TD></TR></TABLE>

Same except for the LSD.

EX/Si
1st-----3.250
2nd-----1.900
3rd-----1.250
4th-----0.909
5th-----0.750 for Si HB and Del sol Si
or------0.702 for 2 dr or 4 dr sedan
Final Drive---4.250


<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by BauleyCivic &raquo;</TD></TR><TR><TD CLASS="quote">i basically built that motor (d15 block with d16 head...basically same motor with higher compression and less-aggressive cam) and haven't been too impressed yet</TD></TR></TABLE>

D15 = 134mm rod for 1.52 R/S ratio
D15z = 137mm rod for 1.62 R/S ratio

civicminded92

Do you have any information on the pistons? I have an old VX block that I have been wanting to transform into a psudo JDM D15B by using the Z6 head and P28 ecu. Problem is, the stock VX pistons will net a 8.5:1 compression ratio. Any information will be appriciated.

eg6ajk

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

I am defitnalty guilt this year alone 4 swaps. last year about the same, year before I can't remeber.

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Ricey McRicerton &raquo;</TD></TR><TR><TD CLASS="quote">So how would you compare this tranny to the USDM si/ex tranny???</TD></TR></TABLE>
if its a non-lsd then you got identical trannies. LSD equipped uses totally different ring gear and diff and is not compatiable with SRR or ATS final drive kits (10 bolt vs 12bolt ring gear).

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by UnrealSpeed &raquo;</TD></TR><TR><TD CLASS="quote">So between the D16Z6 and D15B which would u pick?</TD></TR></TABLE>
about 2 month ago I had a JDM ZC sohc vtec (just like USDM D16z6), all I can say that it was very comparable to the d15b but slightly more torquey down low. price difference (about $150-200) would make me choose the D15B. added ability to rev so freely.
a graph overlay i did while its Z6 vs the d15b


<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by NotecEG8 &raquo;</TD></TR><TR><TD CLASS="quote">

so can the chipped p28 to p08spec ecu use the 4 wire 02, or will that have to be swapped to the 2 wire?

also i noticed you are not running a/c, is there a reason? i would like to do this swap to my 4dr in the near future and would like to retain my a/c.

sorry if these have been answered before.</TD></TR></TABLE>
once chipped it will run using the 1 wire 02.

car came bare no A/C, no PS, not even tar or noise reducing carpeting.

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by iluvjasmine &raquo;</TD></TR><TR><TD CLASS="quote">how aggressive is the sound/feeling of vtec crossover in this motor? is it comparable to the b-series?</TD></TR></TABLE>
vtec can defintaly be felt and heard (more noise) but it will never be like the b-series as the SOHC vtec design only controls the intake side.

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by EL-Driver &raquo;</TD></TR><TR><TD CLASS="quote">I wonder though...
Is the auto tranny with LSD compatable with the D16Y8???
QUOTE]
same gear ratios not sure on exact interchange and compatiblity with OBDII ecu.

[QUOTE=civicminded92]Do you have any information on the pistons?
</TD></TR></TABLE>
haven't cracked one open to check and measure these. will do in near future.

RStoR

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by civicminded92 &raquo;</TD></TR><TR><TD CLASS="quote">Do you have any information on the pistons? I have an old VX block that I have been wanting to transform into a psudo JDM D15B
</TD></TR></TABLE>

Buy these for it. Should produce around a 12+:1 compression ratio depending on headgasket and if milling has been done. You can't swap many D15/16/17 pistons because the longer 137mm rod will put the pistion way out the hole or too low for decent compression.

PMS-A00 Piston
2001-03 Civic GX (Natural Gas Fleet Car)
Out of a D17A engine
total height: 47.42mm
compression height: 27.00mm
1.50mm dome

Eskay@JDMCircle.com

theres a sohc vtec zc? Arent all ZC motors non-vtec if im not mistakening myself?

eg6ajk

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by skt &raquo;</TD></TR><TR><TD CLASS="quote">theres a sohc vtec zc? Arent all ZC motors non-vtec if im not mistakening myself?</TD></TR></TABLE>

ZC simply means nothing more then 1.6L d-series motor . there are many flavours of it from non-vtec to 3stage vtec to dohc.

DevLishPlaya

i have the same engine wooo... but i broke one of the studs in the head, anybody had this prob before how can i fix this???

743power

I'd be interested in seeing the weight difference between the d15, and say a z6, or your b20, or even a b16. Do you have access to a scale that can weigh that much, next time you swap?