so wich on is better???? need to knw horsepower wise??? lbs psi torque??? any info oh and will it drop right in to a 91 civic hatc????motor mount wise???

 

"psi" huh? JDM D15B 130hp. 102 tq. D16Z6 127hp 106tq. D16Z6 is the USDM version of the JDM D15B. Same head on both engines. Block is a little different if I recall.

 

Personal I perfer the z6

 

D15B(JDM) SOHC VTEC 92-00 Civic 130hp

D15B(JDM) SOHC 3-Stage VTEC 92-00 Civic 130hp

D15B/1/2/7 1.5L SOHC non-VTEC '88-'95 Civic's 62-102hp

D16Z6 1.6L SOHC VTEC 92-95 Civic EX/Si 125hp

 

oh ok i see sorry about the psi question that was stupid any how what is the diffrence between a regular vtec and a 3 stage vtec??? any power difference????

 

well the two JDM D15B's make the same power (130Hp) so im guessing that there is no power difference. Im not sure what the 3 stage means. Do some research on it.

 

3 Stage VTEC:
Examine the SOHC VTEC and SOHC VTEC-E implementations. The clever Honda engineers saw that it is a logical step to merge the two implementations into one. This is in essence the 3-stage VTEC implementation. 3-stage VTEC is implemented on the D15B 1.5l SOHC engine in which the VTEC-E mechanism is combined with the power VTEC mechanism.
Many of us probably has laughed at the poor ignorant layman who said "I want power AND economy from my Honda". We know of course that power and economy are mutually exclusive implementations. Honda decided not to abide by this rule. Now, with 3-stage VTEC, we get BOTH power and economy !.
The diagram below illustrates the 3-stage VTEC implementation. The intake rocker arms have two VTEC pin actuation mechanisms. The VTEC-E actuation assembly is located above the camshaft while the VTEC (power) actuation assembly is the standard wild-cam lobe and rocker assembly.






Below 2500rpm and with gentle accelerator pressure, neither pin gets actuated. The engine operates in 12V mode with very good fuel combustion efficiency. When the right foot gets more urgent and/or above 2500rpm, the upper pin gets actuated. This is the VTEC-E mechanism at work and the engine effectively enters into the '2nd stage'. Now D15B 3-stage works in 16V mode (both intake valves works from the same mild cam-lobe).
Stage 2 operates from around 2500rpm to 6000rpm. When the rpm exceeds 6000rpm, the VTEC mechanism activates the wild cam-lobe pushing the engine into the '3rd stage', the power stage. Now the engine gives us the full benefit of its 130ps potential.

 

I filled in what I knew.

There are also all kinds of D-series engines in Europe and other parts of the world that weren't produced anywhere else.

 

3 stage is kind of a bastard child btw. It is OBD2 and untunable. Only worth getting if you want the motor for gas mileage in your commuter. But even then I think you can attain the same mileage from cheaper old USDM D15s.