im looking into a new motor setup the stock d16a6 in my 89 crx si is goin to ****. The Dohc ZC swap seems to be alot simpler with both motors bein OBD-0. both motors make the same horsepower give or take a few and the ZC seems to have pretty decent torque.Any one know the torque specs on the D15B? is the D15b worth the work compared to the ZC? thanks in advance!

 

go with the zc

 

does anybody else have any ideas? bump

 

ZC
I had a ZC SOHC and it was a screamer. I was hanging with Integra's (Intake, Exhaust) no problem

 

ZC. basically it come down to VTEC Vs. one more cam and more displacement.

vtec is overrated

 

when it comes out to that the ZC setup in my 89 crx si would be quite a bit faster than with the D15b correct? Also would the ZC respond better to bolt ons?

 

they are pretty equal motors AFAIK, but the ZC will be slightly easier to swap in. I had a ZC in my EF & loved it, so that is my suggestion: go for the DOHC ZC

 

is there a DOHC ZC VTEC?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by JC18 &raquo;</TD></TR><TR><TD CLASS="quote">is there a DOHC ZC VTEC?</TD></TR></TABLE>
no the only thing close to the ZC that has vtec is the b16. If u wanted an obd-1 motor they have ob1 Zc's also.

 

DOHC it

 

ZC. i have a dohc zc in my 89 si hatch and i love it...

 

Go with the DOHC ZC. You won't regret it

 

just wondering if the DOHC ZC is worth the premium over the SOHC ZC? Seems like there's only 10hp difference, but the price for DOHC is some $2-300 (including the ecu). Does the DOHC have much more tuning potential, or is there no big difference?

 

Vtec for one is not over rated in the b series world or h series world but yes unfortunately it is very much over rated in the d series world. Beings how your car is a OBD0 car and so is the ZC I would do the ZC. Getting vtec to work in a OBD0 car with a sohc can be a pain unless you convert to OBD1.

 

me an dmy buddy went over this. here is what happend

HIS CAR
90 crx dx
jdm zc
si tranny
act clutch
intake
exhuast

MY CAR
91 crx si
jdm d15b
si tranny
act clutch
stock intake with k/N
exhuast

in the race i had two people and he had one
we took off from light in roll and at about 3-4 k we hit it and we stayed even till top3rd i pulled one car all i can say is my car weighs more and had extra person and we have same mods pretty much

 

why not go with a b18a?? more torque and the same hp. Ive seen full swaps all the time for like 500

 

I recommend the DOHC ZC. I have a just a intake and 2.25" exhaust. On a chassis dyno it put down 115 HP and 99 ft-lb. It's a good motor. Either one can be modded, but the single cam is more restricted because cam phasing is set.

 

sigh.....all you DOHC ZC people.

my sohc zc vtec womps on DOHC zc's integra ls motors....so come on.....:/

the d15b jspec is just a sohc zc vtec, with 1 tenth less is placement.
1.5 liter vtec vs 1.6 non.

my 1.6l vtec &gt; 1.6non

 

I would go with the ZC I have a d16z6 in my pretty much the american version of the jdmd15b vtec and I dont like it at all im thinking of doin the dohc ZC swap in my 91 crx dx

 

DOHC ZC i kill d15 vtec

 

i have both and love them both. i've kept up with stock b16s with the d15b with boltons. haven't ran the dohc zc yet. but it feels much funner with the added torque. both motors get a from me.

 

never been to thrilled at zc engines....every friend Ive known has had a lot of problems with theirs. I think d15b vtec would be cooler than a zc. SOHC powa! But at the same time if you already have an a6 engine just slap a vtec head on it. *** the zc

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by civicdragger818 &raquo;</TD></TR><TR><TD CLASS="quote">Getting vtec to work in a OBD0 car with a sohc can be a pain unless you convert to OBD1. </TD></TR></TABLE>

couldint u hook up VTEC to a RPM swich or a AFC? and leave the car OBD0

 

i love my dual cammer ZC

 

I currently have a 92 Hatch with a turbo ls but I have to say I use to have a 89' hatch with a ls in it and had a friend with a 91 crx with a ZC in it. At the track he would get beat by a couple 3 or 4 tenths of a second. On the street in third gear he always seemed to have a bit more *** than my ls did. I could walk him back down in 4th and 5th but in 3rd he seemed to have alot of ***. His was a good strong motor which is the key. A good strong ZC is a good motor.