roughly what would be the horsepower gains if a zc sohc v-tec head was put onto a stock d-15b7 with 102bhp stock? please reply soon my buddy who wants to do the swap has only a few days before the head goes to somebody else thanks.

 

Actually, the D15B7 has 86 whp stock. h:

It'd basically be a D15B (JDM VTEC) at that point. They say they have 130 chp.

hih

 

actually its net hp is 102 @ 5900rpm. anyway thanks for the info and ill relay the message. hopefully we can squeeze out more ponys than that. but we really want to stick to a single cam with his car.

"Why", some people may ask.
my reply, "why not".

 

Yes, chp not whp.

Good luck

 

Smaller rods. Worse valve geometry. Narrower bore. Single cam (duh). Lower displacement. Lots of reasons.

Doesn't the D15B have higher compression?

 

Yes, it does. Good call!

What's the CR on the D15B7?

:edit: Whoh! http://www.knology.net/~jediklc/D.htm
Thank you google!

 

D16Z6, 125chp, pretty close.

EDIT: WCS edits > me h:

 

:chuckles:

D15B7
...
Displacement (cc): 1493
Power (bhp@rpm): 102@5900
Torque (ft/lbs@rpm): 98@5000
Compression Ratio: 9.2:1
Bore (mm): 75
Stroke (mm): 84.5
Cam Design: sohc
VTEC?: no

Taken from here: http://www.clubcivic.com/board/civicspecs.php and http://www.knology.net/~jediklc/D.htm

D15B
...
Displacement (cc): 1493
Power (bhp@rpm): 130@6800
Torque (ft/lbs@rpm): 14.1kg/m@5200
Compression Ratio: 9.6:1
Bore (mm): 75
Stroke (mm): 84.5
Cam Design: sohc
VTEC?: yes
OBD:
Year(s) Produced: 1991-1999
In the following car(s): Honda Civic VTi (EG4)

According to this page: http://www.jdmuniverse.com/forums/ht...=Engine%20Info

 

well in my friends situation he cant afford a complete b or h series setup cause he is like me and lives paycheck to paycheck. But what he can afford is some blood, sweat, and tears into what hes got to work with. and in my book thats all you need in any engine infatuation . i mean cmon we all had to start somewhere right (DUH)? but critisizm is always welcome thanks "KAI"

 

No problem. I'm actually in love with the D15A3, but that's something else. The "duh" was not an insult, it just indicates that that downfall was fairly obvious but I was pointing it out anyway.

I know how expensive B series swaps can be, that's part of the reason why I defected to Rotaries. I just can't justify spending $1800 for a 180hp, 127ft-lb N/A engine when I can spend $800 on a 182hp, 183ft-lb turbo engine.

Don't worry, I don't hate D-series, I've helped a friend of mine put a 16v D15B7 head on his 8v D15B8 block in the never-ending search for horsepower on a budget. That's even less worthwhile then a D16Z6 head swap, but hell, it gave him more power.