Ok, I'm googeling everything and find a lot of people saying what D15b do you have. some people saying theirs a v tec one and a non v tec one why is this?

I thought if it said D15B it automatically means its a JDM V-Tec?

And so how many different ones are their?

 

this is what i have come up with my research. theres two kinds. one has your standard vtec and one has your 3 stage vtec. im doing the same research because im turboing a d15b.

 

So theirs only 2 different ones? because i got lucky and found mine at a junk yard, but mine had a weird old skewl looking head on it and a cable tranny.

When i put my y8 v tec head on it i had to remove the oil jet for v tec.

 

Bump?

 

there are two different D15bs(both are vtec) but there are the D15b2,6,7,and 8 (all are non vtec).

 

Well I'm asking because why when i picked my block from the junk yard did it have a non v tec head and the oiil jet was closed on the block. and if i remember right i think it had pm3 pistons. and shouldn't all JDM D15B's have po8 pistons?

 

http://d-series.org/forums/naturally...-official.html


The code on your block... it just says "D15B"? or is it D15B_?

 

it just says D15B. but im reading that it might not be JDM this is what im trying to find out. cause i think if it were JDM it would have p08 pistons?

 

yea, it would have P08 pistons

 

so does this mean i have a d15b7 with a block stamped D15B?

 

D15B -> Dual carbed non vtec, essentially a dual carbed D15B7, I believe these also existed in a multiport fuel injected version which would be identical to a D15B7, you probably have this.

D15B -> OBD1 SOHC Vtec (this is the one most people are familiar with)Same P08 head as a D16Z6

D15B -> OBD1 Vtec-e, Same as the D15Z1 VX engine

D15B -> 3 stage vtec

All of the above engines are stamped simply "D15B"

 

D15B without any number after the B is JDM. If you see such a D15B in the states, it came over from Japan, having been purchased by a used engine dealer who sells engines to those doing swaps.

The D15B will be either vtec or non-vtec. If your valve cover has the spark plug holes on the front side, then you have VTEC. If the plug holes are on the aft side, then it is non-vtec.

A non-vtec D15B, when it was being driven in Japan, was dual carbed. When it is shipped to the U.S. for re-sale, it is typically modified to MPFI (or DPFI), meaning the aperture on the aft passenger side of the head has a block-off plate held in place with two bolts/nuts, and it has an MPFI (or DPFI) intake manifold and throttle body. The camshaft on the non-vtec D15B has an extra lobe on the passenger side. This extra lobe once drove the dual carb'd mechanical fuel pump which was mounted at the aforementioned aperture.

I started a writeup comparing the D15B7 and non-vtec D15B at http://honda.lioness.googlepages.com...15benginenotes

 

94eg8 and honda lioness are the only ones right.
ignore everyone else, they are misinformed.

 

Ok, and the non v tec dual carbed D15B had PM3 pistons?

 

why would it have usdm pistons?

 

I've had a D15b non vtec in my Civic before. It was OBD-0 and I used my OBD-1 parts to make it work.

 

I had a JDM D15B SOHC Vtec in my CRX back in the days. It was a blast to drive. Anyways I have linked an article below about the JDM D15B Vtec engine if, you want to read up on it.

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

 

D15A2

The JDM spec engine model of one of the EW series motors, used in later years of the third-gen Civic.

[edit] D15A3

* Found in:
o 1985-1987 Honda CRX Si and 1987 Civic Si (AU/NZ)
+ Displacement : 1,488 cc (90.8 cu in)
+ Bore and Stroke : 74 mm × 86.5 mm (2.9 in × 3.4 in)
+ Compression : 8.7:1
+ Power : 91 hp (67.9 kW, 92.3 ps) @ 5500 rpm
+ Torque : 93 ft·lbf (12.9 kg/m, 126 Nm) @ 4500 rpm
+ Valvetrain : SOHC (3 valves per cylinder )
+ Fuel Control : PGM-FI2

[edit] D15B

* VTEC
* Found in :
o 1991-1999 Honda Civic VTi EG4 (Japanese Market)
o 1992-1998 Honda CRX VXi EG1 (Japanese Market)
+ Displacement : 1,493 cc (91.1 cu in)
+ Bore and Stroke : 75 mm × 84.5 mm (3.0 in × 3.3 in)
+ Rod Length : 137 mm
+ Rod/Stroke : 1.62
+ Compression : 9.6:1
+ Power : 130 hp (96.9 kW, 132 ps) @ 6800 rpm
+ Torque : 103 ft·lbf (14.1 kg/m, 138 Nm) @ 5200 rpm
+ Redline : 7200 rpm
+ Fuel Cut : 7411 rpm
+ Valvetrain : SOHC VTEC (4 valves per cylinder)
+ VTEC Switchover : 4200 rpm
+ Head Code : P08
+ Piston Code: P08-010
+ Fuel Control : OBD-1 MPFI

[edit] D15B (D15Z7) (3 stage VTEC)

* 3-stage VTEC
* Found in:
o 1995-1999 Honda Civic VTi EK3 and Ferio Vi
+ Displacement : 1,493 cc (91.1 cu in)
+ Bore and Stroke : 75 mm × 84.5 mm (3.0 in × 3.3 in)
+ Rod Length : 137 mm
+ Rod/Stroke : 1.62
+ Compression : 9.6:1
+ Power : 128 hp (95.4 kW, 130 ps) @ 7000 rpm
+ Torque : 102 ft·lbf (14.2 kg/m, 138 Nm) @ 5300 rpm
+ Valvetrain : SOHC VTEC (3-4 valves per cylinder, depending on rpm)
+ VTEC Switchover : ? rpm
+ Fuel Control : OBD-2 MPFI

[edit] D15B

* Non-Vtec
* Found in :
o 1988 Honda CRX 1.5X (rare)
o Ferio MX (Japanese Market)
+ Displacement : 1,493 cc (91.1 cu in)
+ Bore and Stroke : 75 mm × 84.5 mm (3.0 in × 3.3 in)
+ Compression : 9.2:1
+ Power : 106 hp (96.9 kW, 105 ps) @ 6500 rpm
+ Torque : 95.4 ft·lbf (13.2 kg/m) @ 4500 rpm
+ Rev limiter : 7400 rpm
+ Valvetrain : SOHC (4 valves per cylinder)
+ Fuel Control : Dual Carburetor

[edit] D15B1

(Same as the D15B2 engine, but with a mild camshaft, and a restrictor plate between the throttle body and intake manifold)

* Found in:
o 1988-1991 Honda Civic Hatchback
+ Displacement : 1,493 cc (91.1 cu in)
+ Bore and Stroke : 75 mm × 84.5 mm (3.0 in × 3.3 in)
+ Compression : 9.2:1
+ Power : 70 hp (52.2 kW, 71.0 ps) @ 5500 rpm [1]
+ Torque : 83 ft·lbf (11.4 kg/m, 112 Nm) @ 3000 rpm [2]
+ Valvetrain : SOHC (4 valves per cylinder)
+ Fuel Control : OBD-O DPFI

[edit] D15B2

* Found in:
o 1988-1991 Honda Civic GL/DX/LX
o 1988-1991 Honda CRX DX
o 1992-1995 Honda Civic LSi Hatch/Saloon (European Market)
o 1990-1995 Honda Concerto (European Market)
+ Displacement : 1,493 cc (91.1 cu in)
+ Bore and Stroke : 75 mm × 84.5 mm (3.0 in × 3.3 in)
+ Rod Length : 134 mm
+ Compression : 9.2:1
+ Power : 92 hp (68.6 kW, 93.3 ps) @ 6000 rpm
+ Torque : 88 ft·lbf (12.2 kg/m, 119 Nm) @ 4500 rpm
+ Valvetrain : SOHC (4 valves per cylinder)
+ Cam Gear : 38 tooth
+ Piston Code : PM3
+ Fuel Control : PGM-FI Dual Point (OBD0)
+ Redline : 6500 rpm (6000 rpm Honda Concerto) 7200 rpm rev limiter

[edit] D15B3

* Found in:
o 1988-1989 Honda Civic EX
o 1988-1995 Honda Civic Shuttle GL
o 1992-1995 Honda Civic LX (NZ model)
o 1988-1991 Honda Civic LX (NZ model)
+ Displacement : 1,493 cc (91.1 cu in)
+ Bore and Stroke : 75 mm × 84.5 mm (3.0 in × 3.3 in)
+ Compression : 9.9:1
+ Power : 95 hp (70.8 kW, 96.3 ps) @ 6000 rpm
+ Torque : ? ft·lbf (? kg/m, ? Nm) @ ? rpm
+ Valvetrain : SOHC (4 valves per cylinder)
+ Cam Gear : 38 tooth
+ Fuel Control : Carburetor

[edit] D15B4

* Found in:
o 1989-1991 Honda Civic GL (Australian Market)
+ Displacement : 1,493 cc (91.1 cu in)
+ Bore and Stroke : 75 mm × 84.5 mm (3.0 in × 3.3 in)
+ Compression : 9.2:1
+ Power : 96.5 hp (72kw) @ 5200 rpm
+ Torque : 90 ft·lbf (12.4 kg/m, 122 Nm) @ 3800 rpm
+ Valvetrain : SOHC (4 valves per cylinder)
+ Fuel Control : Dual Carburetor

[edit] D15B6

* Found in:
o 1988-1991 Honda Crx HF
+ Displacement : 1,493 cc (91.1 cu in)
+ Bore and Stroke : 75 mm × 84.5 mm (3.0 in × 3.3 in)
+ Compression : 9.1:1
+ Power :
+ ['88-'89] 62 bhp (46.23 kW, 62.86 ps) @ 4400 rpm
+ ['90-'91] 72 bhp (53.7 kW, 73.0 ps) @ 4500 rpm
+ Torque : 83 ft·lbf (11.5 kg/m, 113 Nm) @ 2200 rpm
+ Valvetrain : 8-Valve SOHC
+ Fuel Control : OBD-0 MPFI
+ Head Code : PM-8

[edit] D15B7

* Found in:
o 1992-1995 Honda Civic CX (Canadian model)
o 1992-1995 Honda Civic DX/LX
o 1993-1995 Honda Civic del Sol S
o 1992-1995 Honda Civic LSi Coupe (European Market)
+ Displacement : 1,493 cc (91.1 cu in)
+ Bore and Stroke : 75 mm × 84.5 mm (3.0 in × 3.3 in)
+ Compression : 9.2:1
+ Power : 102 hp (76.1 kW, 103 ps) @ 6200 rpm
+ Torque : 98 ft·lbf (13.5 kg/m, 133 Nm) @ 3800 rpm
+ Valvetrain : SOHC (4 valves per cylinder)
+ Piston Code : PM3
+ Fuel Control : OBD-1 MPFI
+ ECU: P06

[edit] D15B8

* Found in:
o 1992-1995 Honda Civic CX (U.S. model)
+ Displacement : 1,500 cc (91.5 cu in)
+ Bore and Stroke : 75 mm × 84.5 mm (3.0 in × 3.3 in)
+ Compression : 9.2:1
+ Power : 70 hp (52.2 kW, 71.0 ps) @ 4500 rpm
+ Torque : 83 ft·lbf (11.5 kg/m, 113 Nm) @ 2800 rpm
+ Valvetrain : SOHC (2 valves per cylinder)
+ Fuel Control : OBD-1 MPFI.

[edit] D15Z1

* VTEC-E
* Found in:
o 1992-1995 Honda Civic VX
o 1992-1995 Honda Civic VEi (European Market)
+ Displacement : 1,493 cc (91.1 cu in)
+ Bore and Stroke :75 mm × 84.5 mm (3.0 in × 3.3 in)
+ Rod Length : 137 mm
+ Rod/Stroke : 1.62
+ Compression : 9.3:1
+ Power : 90 hp (67.1 kW, 91.3 ps) @ 5600 rpm
+ Torque : 98 ft·lbf (13.5 kg/m, 133 Nm) @ 4800 rpm
+ Valvetrain : SOHC VTEC-E (3-4 valves per cylinder depending on RPM)
+ VTEC Switchover : 2500 rpm
+ ECU Code : P07
+ Fuel Control : OBD-1 MPFI

[edit] D15Z4

* Found in:
o 1996-2000 Civic Exi and SA Ballade & Civic 150i
+ Displacement : 1,493 cc (91.1 cu in)
+ Bore and Stroke : 75 mm × 84.5 mm (3.0 in × 3.3 in)
+ Power : 90 hp (67.1 kW, 91.3 ps) or 105 hp @ 5800 rpm
+ Torque : 99-103 ft·lbf (14 kg/m, 134-140 Nm) :confirm?]] @ 4200 rpm
+ Valvetrain : SOHC (? valves per cylinder)

[edit] D15Z6

* VTEC-E
* Found in:
o 1995-2000 Honda Civic 1.5 iLS (European Market)
+ Displacement : 1,493 cc (91.1 cu in)
+ Bore and Stroke : 75 mm × 84.5 mm (3.0 in × 3.3 in)
+ Rod Length : 137 mm
+ Compression : 9.6:1
+ Power : 114 hp (85 kW) @ 6500 rpm
+ Torque : 98 ft-lb (141 Nm) @ 5400 rpm
+ VTEC Switchover : depending on load, max ~3500 rpm in 5th gear
+ Valvetrain : SOHC VTEC (3-4 valves per cylinder, depending on rpm)
+ Fuel Control : OBD2 PGM-FI MPFI

[edit] D15Z7

* 3-stage VTEC
* Found in:
o 1996-1999 Honda Civic VTi EK3 and Ferio Vi
+ Displacement : 1,493 cc (91.1 cu in)
+ Bore and Stroke : 75 mm × 84.5 mm (3.0 in × 3.3 in)
+ Rod Length : 137 mm
+ Rod/Stroke : 1.62
+ Compression : 9.6:1
+ Power : 128 hp (95.4 kW, 130 ps) @ 7000 rpm
+ Torque : 102 ft·lbf (14.2kg/m, 139 Nm) @ 5300 rpm
+ Valvetrain : SOHC VTEC (3-4 valves per cylinder, depending on rpm)
+ VTEC Switchover : ? rpm
+ Fuel Control : OBD-2 MPFI
+ ECU Code : P2J

[edit] D15Z8

* VTEC-E
* Found in:
o 1997-2000 Honda Civic LS (European Market)
+ Displacement : 1,493 cc (91.1 cu in)
+ Bore and Stroke : 75 mm × 84.5 mm (3.0 in × 3.3 in)
+ Compression : 9.6:1
+ Power : 114 hp (85.0 kW, 116 ps) @ 6500 rpm
+ Torque : error?: 95-99 ft·lbf (13-14 kg/m, 128-134 Nm) :confirm? @ 4500 rpm
+ Head Code : P2J
+ ECU Code : P2P
+ VTEC Switchover : 2500 rpm
+ Valvetrain : SOHC VTEC-E (4 valves per cylinder)
+ Fuel Control : OBD2 MPFI

 

QFT

 

I have found that locating detailed specs on certain JDM engines, like this one, is a tall task. If forced to bet, then my money would be on the D15B non-vtec's pistons being PM3, because

--this is what is in the D15B2 and D15B7
-- the D15B2 and D15B7 (and other D-series engines) have the same bore and stroke and are also non-vtec
-- my D15B non-vtec head has PM3-8 stamped on it.
-- at least one internet forum post elsewhere said D15B non-vtecs use PM3 pistons.

From a manufacturing efficiency standpoint, I can't see why the D15B7, D15B2 and D15B non-vtec would have different pistons. I guess the best confirmation would be stumbling across someone who has torn down one of these engines and has personally seen what is stamped on the pistons. Or a junkyard may offer the same.

's for all the high fuel economy nonvtec D15B tuners.

 

I bought an OBD1 JDM D15B head from someone... how do I tell if it's the VTEC or VTEC-E? No valve cover.

 

Maybe try turning the cam gear and watch the valves open and close. I know on the D15Z1 heads, only 1 intake valve per cylinder opens all the way, the other just moves a hair.

 

Alright, i'll try that. I'm still waiting for it to get here though.

 

im pretty sure that motor has had many parts changed in its history probrably has been rebuilt and has a mix of many d-series parts

 

i went to my uncles junkyard and i found a vtec head i think its a dual stage vtec head it has 2 vtec soleniods. does anyone know where it comes from? pros or cons?