which is better? D16z6 or D15b?

[95_EG8_VTi]

Well, I own a 95 Ferio with the JDM D15B 130 hp engine and it is very fast for such a small engine. I believe it would easily smoke any D16, otherwise why would Honda put that engine in their second performance Civic?. The top model of course is the SiR, with the 170 hp B16 engine, but the second best Civic is the VTi with the 130 hp D15B.

[95_EG8_VTi]

JDM D15B engine is 130 hp, 7200 rpm Redline.

[vnvp408]

depend which d15b ya talking about bro. the US d15b=d15b7 1.5L

Japan JDM D15b is just d15b 1.5L

D=D series Motor
15=1.5L
B or b7=Lable of the motor in the D series

but yea the JDM Motor Rock's Harder then the US motor

B16A JDM or b16A2 of course import stuff dont got the US limit CRAP

[95VTIEj1]

Well. alot of people thank the bigger the liters the faster they are.. But Im gunna get technical with you. The Jdm d15b (no jdm motors have any sub labels ex.b2, b7,z6) With the combination of the matching jdm tranny That has LSD unlike ANY other d series trans (better for quick launching). Most All d15's have higher compression (dome) pistons unlike the d16z6's lower compression (dish) pistons Which makes for slightly stronger vtec engagement when equipped, Also EVERY SOHC D-series motor is 75mm bore so theres not any difference there. The d15b vtec head is identical to a d16z6 head. But the block of a D15 DOES have a shorter deck height (207mm unlike D16/17 212mm) and shorter rods (134 instead of d16 137mm)with differently timed and shorter crank strokes. (84.5mm unlike d16z6 90mm). It has 107lbs of tq. BUT the shorter rod strokes do give them quicker take offs and the extra 2 lbs difference in motor internals does make barely lighter . Plus the matching jdm ecu's aren't really programed for Great gas milage and have slightly more noticable vtec engagement. So technically the d15 vtec IS quicker but not Faster in Higher speeds, IF you use the correct ECU. and yes d16z6's are better for boost because of the lower compression pistons.

[CivicSpoon]

^The D15b has a different cam from the d16z6. The d15b has a compression ratio of 9.3:1 and the D16z6 has a compression ratio of 9.2:1, so there is little difference. And to clarify, not all jdm d15b transmissions have LSD.

[95VTIEj1]

Well damn, looks like someone on this post besides me knows a little more just engine displacement. Thank you Spoon. The VTI d15bvtec had the lsd trans. Yea i heard yesterday about the cam lobes being a little bigger. Thanks for the correction tho.

[Tigga1980]

I Just got A D15B JDM SOHC Vtec. I want to get performance valve springs,retainers, Valves, & cams. But some one told me I have to change to
a D16Z6 head to do that. Is this true? If not were do I go to find the stuff I would love to have?

[PRCIVIC]

Just get and install a set of P29 pistons on any of those engines and you will get amazing resulsts, i have them on a D16Z6 with just a chip on a P28 ecu with some other cheap things (header, intake, exhaust and a little bit of extra fuel pressure) and i have a lot of fun beatting some civics like mine, and my car is auto trans, some of them think i have a B16. But if you are not racing i can tell you the D16Z6 or the JDM D15 v tec for the extra horses and torque!

[superman'd b18]

ok. this is retarded.... how about we say that in america; the stock versions of the engines, would have the z6 winning.... in japan, the d15b wins..... if you compare them, they both have favorable parts, it just depends on what they are being used for...

[1994hondac]

i have a 94 civic ex coupe with d16z6 with cold air intake header,downpipe,2 1/4" exhaust,2 1/2" muffler and some decent width rims its pretty quick i raced a crx with a b17 suposedly stock and beat me by like two lengths wich i think is bull cuz the b17 has like 150 hp

[1994hondac]

i wanna put an h22a in but im not sure if the exhaust will line up right or the axles

[PRCIVIC]

Originally Posted by 1994hondac

i have a 94 civic ex coupe with d16z6 with cold air intake header,downpipe,2 1/4" exhaust,2 1/2" muffler and some decent width rims its pretty quick i raced a crx with a b17 suposedly stock and beat me by like two lengths wich i think is bull cuz the b17 has like 150 hp

Dude the B17 have a good tranny and your engine is stock too, and you never know what's under the hood of an Honda. Not everybody tells all the extras they have, there are lots of things you can't see by just looking at the engine. Stock Honda's would not race hard enough specially USDM like ours. Go get a stage II cam and some pistons like the ones i have or the ones in the D15 that have higher compression, put a chip to the ecu and try to get a ZC tranny, shorter shifts ratios and higher final drive, then race again. Dont forget to set it in a dyno and dont tell everything to everybody!opcorn:

[Christ]

He said B17... D17 engines are crap, with crap for intake manifolds, crap for exhaust manifolds, and crap for internals... You should never again refer a D17 as "good"... or any sort of the term.

B17 engines were put in some GSR models, can't remember which years...

It's basically a de-stroked ITR motor, IIRC.



Depending on what each car had in it, (interior, system, etc.) that CRX could have had about 400 or more lbs on you too, which makes up about 4/100 of a second.. not much, but a start on those 2 lengths he got you by.

Your potential lack of driving skill compared to the other driver can mean alot too, not to say that you can't drive, but there is always that possibility... we don't know you.

Missing a single shift can be the difference between winning by a nose and getting your ass kicked by 2 lengths.

That B17 was designed as a race engine, used for a street car... it has a much broader torque curve, and makes power for longer, and at a higher RPM than your Z6 does. Higher RPM == faster, no matter what way you look at it.

[PRCIVIC]

OMG! You are wright Dude! But i already fix it, sorry if i comfused anybody. D17's are for grannys to go to grocery stores and for their dates with doctors. About the GS-R B17A was for 92-93, kind of rare i guess! And you are completly right about the driving skills or if he has an old worn and burned clutch. Anyway he is not going to get so far with a stock engine.

[1994hondac]

yea my clucth was smoked i just replaced it with a racing clutch and just for my own curiosity the 91-93 civic hatch's are those the ones with the jdm d15b? cuz if they are i have smoked everone i have raced but it wasnt a from stop it was on the highway