ZC lowest compression motor?

blight · #1 08-27-2005, 07:52 PM

1. Ok is it true that the ZC motor out of the honda CRX SI model has the lowest compression?

2. If that were to be true would that not mean (with obvious internal mods) that this would be the best motor to turbo for the reason that you can run more boost off of it? i know that with out internals being redone that it can take up to 200hp easy.

3. what 5 spd tranny would i want to run behind this for 200hp? that stock one out of the crx or something else?

4. Is there alot of performance parts for these? Any recomended threads that you can think of that might help me for what vedors i should use? For things such as forged pistons and rods and header and intake manifold (i plan on turboing this with a home made turbo kit) (my god am i having a brain fart *poot*: kill me if you will my job and girlfriend are destroying my brain...) that thing that hooks up to the exhast and the enigne (my god just kill me now *shake of head*).

5. Was the thing called just a ZC or is that a nickname for the engien that seems like a awfully small name for a honda engien they are usually like 5numbers and letters mixed together... i guess this is another stupid question.

6. What years of crx had this engine is there a real good way of spoting it in a junkyard?

7. Is there a specific year of crx i will be looking for to strip and do up a zc in? Si this difficult to wire ( i do carbed motors NOT fuel injected ones - but MPG is MPG so here we go fuel injection)?

8. How much will the crx weigh when gutted down with a zc in it?

9. Will i want the dohc or the sohc ZC for the turbo in other words wich will hold up better and which can i run more boost in relation to how low the compression is.

I have two major conversations with you guys in the past one about a 94 civic hatchy and another about a crx with a b16 i ahev run across a website known as www.homemadeturbo.com whihc i actualyl may have got from you guys. And i am finally seriously thinking of doing this on the side of build this 302 for an older mustang (79-86) they weighed at max 2800 pounds if you do not get the convertable. I am looking at ONLY CRXs and ONLY the ZC unless there was another motor that had less compression to it that honda made that is cheap to get. So as far as i can tell the vendors i should use were as follows will this also apply for the CRX and apply for the ZC?

Intakes: AEM, J's Racing.

Header: DC Sports

Exhaust: RS*R

High-flow Catalytic Converters: Magnaflow, Carsound, and Random Technologies (do i need a converter? because in my state you don't need to have them on your car UNLESS you are selling it then it becomes illegal - then you have to put them back on for the buyer.)

Suspension: Tien

“Other locations”: Energy Suspension (bushings for suspension, engine mounts)

Wheels: Rota (Best wheel size:15x7)

I can't think of anymore questions now but anything any of you can add like maybe what turbo i may want to consider and blov and IC and so forth. THANX to anyone who can help out!

iVteC_PoWeR · #2 08-28-2005, 09:33 PM

Im not sure if a ZC has the lowest compression but just because of the lower CR doesnt mean its the best for turbo. All of the other options out there can be just as good for turbo if you lower the CR of those other motors. As far as I know ZC doesnt have much aftermarket support but you will find some. And if your are getting one get a DOHC not sohc you will love it so much more. Now may be your talking about STOCK turbo apps which if the ZC CR is that low than yes it might be better. But if you ask me then I would suggest a LS for a turbo candidate.

arodg25 · #3 08-28-2005, 09:54 PM

as far as d-series engines go, the zc might just have the highest compresion. the Dohc zc is 9.6:1 the sohc Zc = 9.3:1, d16A6 (si) = 9.1:1 and the d15b1 (Dx) is 9.2:1.
from your post i cant tell if you know that the zc is from japan so you probably wont be finding one in the junk yard. i have a friend who boosted his dohc zc at 7 psi and ran 13.8 in the 1/4 mile but he also switched it to odb1 and had it properly tuned so it was quite reliable. none of that fmu shit. he was running a si tranny and found them a little short for that much power so the dx tranny would be the best for boost cause of the longer gears. oh the zc is the name of the engine, its not a nickname.

blight · #4 08-29-2005, 10:48 AM

For the most part i just need th cheapest 200hp out of any Honda/acura motor. From my understanding the cheapest way to do that is to throw your home built turbo kit on it. And if the ZC is not a usdm motor I DO not want to pay for the shiping and whatnot. so of the USDM motors NOT the jdm what has the lowest compression. or at least the easyiest to make a kit a for. I did a google search on the "Honda engine"+"lowest compression" and the ZC came up so i in turn thought it was. My bad.

blight · #5 08-29-2005, 10:50 AM

For the most part i just need th cheapest 200hp out of any Honda/acura motor. From my understanding the cheapest way to do that is to throw your home built turbo kit on it. And if the ZC is not a usdm motor I DO not want to pay for the shiping and whatnot. so of the USDM motors NOT the jdm what has the lowest compression. or at least the easyiest to make a kit a for. I did a google search on the "Honda engine"+"lowest compression" and the ZC came up so i in turn thought it was. My bad. Same questions apply for whatever motor has the least compression. OR if there was a motor that i can spend less then 1800 on to get 200hp out of and will fit in the CRX of what ever year range is the best and so forth. btw I am a stickler with the 200hp no more no less.i know i wont be on the dot but the closer the better.

turtlecrxsi · #6 08-29-2005, 11:17 AM

D16a6 mpfi... you can find forged pistons for them and retain the stock 9.1:1~ compression with plenty of goodies available aftermarket and at your local autoparts store. I've heard many times that turbos don't like exhaust so don't even bother with a cat and just run a 2.5" exhaust from the downpipe. Engine management (not FMU), bigger injectors 450cc from Eclipse or RC Engineering, Walbro fuel pump as well as oil lines for turbo etc. 200 hp should be very much attainable...

4G4D Store · #7 08-29-2005, 01:14 PM

any of the 1.6l honda motors can handle 7psi with decent tuning and be fine and reliable. The 1.5l leave a little to be desired. If I'm correct (if not somebody correct me), the rods on the 1.5l aren't as strong as the 1.6l, so they won't take as much abuse. the d16a6 would probably be the cheapest motor to find. The zc's aren't as readily available. You can also put in a d16z6 from the 92-95 series cars. That motor is very good to turbo also. One you thing you will want to invest in is some new head studs - I recommend arp - this will help your head from flexing under boost and blowing your headgasket. I wouldn't worry about trying to get the lowest compression engine unless you are going to be running lots of boost - like over 11psi. If you are only going to be running 7psi or so then any of the d16's will be perfectly fine. Keep researching. Or hit me up.

iVteC_PoWeR · #8 08-29-2005, 08:18 PM

Are you sticking with a D series or you think you have enough to get a B? If so get a LS as i stated earlier. B18b can put down 12psi on stock internals which should get you over 200hp.

blight · #9 08-30-2005, 12:17 AM

Quote:

Originally Posted by iVteC_PoWeR

Are you sticking with a D series or you think you have enough to get a B? If so get a LS as i stated earlier. B18b can put down 12psi on stock internals which should get you over 200hp.

Ok here is the deal wich one is going to be cheaper to get up to 200hp SAFELY (daily driver this is) the D16A6 OR the B18B1 ("LS" motor)? I want this to last as LONG as possible.

And what cars did each of these come out of? years? USDM only hopefully... Is either or difficult to find?

And how much will this CRX weigh striped?

And would this SAME kit work for the B16A6 integra motor in the civic or are the pipes going to be diferent? Or is that year the wrong year integra i am thinking of?

http://www.cse.uconn.edu/~yelevich/turbo/turbo.html

THANX a bunch guys as always you are all VERY helpfull here!

turtlecrxsi · #10 08-30-2005, 08:53 AM

90-93 integra b18a1 (obd0), 94-95 integra b18b1 (obd1)... b18b1 has more aggressive cam and better flowing head supposedly which nets a couple more hp. It's all a wiring issue really. B16a will work too as the integra engines above, but the b16a never came in a usdm car. If you want b16a w/ matching tranny good luck finding one that doesn't grind. LS/RS/GS tranny from 90-93 integra (cable) have long gears which work well with turbo. If you go B you need b series axles, motor mounts and custom linkage.

D series d16a6 bolts right up (obd0)... easiest... d16z6 (obd1) wire in vtec with p28 ecu or vafc to activate vtec if left as obd0. d16y8 can be used too but with obd0 or obd1 wiring. D engine mated to dx tranny works well with turbo...

blight · #11 08-30-2005, 10:24 AM

Quote:

Originally Posted by turtlecrxsi

90-93 integra b18a1 (obd0), 94-95 integra b18b1 (obd1)... b18b1 has more aggressive cam and better flowing head supposedly which nets a couple more hp. It's all a wiring issue really. B16a will work too as the integra engines above, but the b16a never came in a usdm car. If you want b16a w/ matching tranny good luck finding one that doesn't grind. LS/RS/GS tranny from 90-93 integra (cable) have long gears which work well with turbo. If you go B you need b series axles, motor mounts and custom linkage.

D series d16a6 bolts right up (obd0)... easiest... d16z6 (obd1) wire in vtec with p28 ecu or vafc to activate vtec if left as obd0. d16y8 can be used too but with obd0 or obd1 wiring. D engine mated to dx tranny works well with turbo...

so out of the b18b1 OR the b18a1 which is going to be cheaper in the long run- to get- to turbo- to keep up-easier to mount and wire(mounting and wiring ease is more important to me than anything else I HATE WIRING! Unless i get some MASSIVE help...)? (lets stay with one of these two motors then). Unless.... well how about the b20a5 motor with a k4 tranny out of a 88-89 prelude si or 90-91 2.0SI prelude they had 135hp@5800/111lb with 9.0:1 compression. wich of these three motors is the easiest of what i am trying to do here?

For example what do each run in for price?
Does the CRX have obd1 or obd0? And which one is easiest to hook up to that?
Does either or have a more aftermarket thing going on?
Is either or have an easier mount kit?

turtlecrxsi · #12 08-30-2005, 11:24 AM

Stay away from dreams of prelude swaps into a crx cuz it ain't going to happen without welding mods etc.

B18a1 and b1 are virtually the same except for the head and they have interchangeable parts.

crx is obd0 with a cable tranny.

I would go b18 a1block/b1head or b1 complete if cheap, hcp mounts, 90-93 new integra axles, hasport or other brand custom linkage, stay obd0, wire mpfi if needed, use a t25 or t3/4 hybrid turbo, custom charge pipes, downpipe and exhaust manifold (if necessary - not sure with b series), or cheap turbo kit, chipped pr4 ecu with turboedit, 450cc injectors, walbro fuel pump, msd ignition/coil, 8.5mm wires, and a decent engine management set-up...

blight · #13 08-31-2005, 11:34 AM

Quote:

Originally Posted by turtlecrxsi

Stay away from dreams of prelude swaps into a crx cuz it ain't going to happen without welding mods etc.

B18a1 and b1 are virtually the same except for the head and they have interchangeable parts.

crx is obd0 with a cable tranny.

I would go b18 a1block/b1head or b1 complete if cheap, hcp mounts, 90-93 new integra axles, hasport or other brand custom linkage, stay obd0, wire mpfi if needed, use a t25 or t3/4 hybrid turbo, custom charge pipes, downpipe and exhaust manifold (if necessary - not sure with b series), or cheap turbo kit, chipped pr4 ecu with turboedit, 450cc injectors, walbro fuel pump, msd ignition/coil, 8.5mm wires, and a decent engine management set-up...

Well what about accord swaps like the F22Bs and the F22As? they all had 8.8:1 compression and that is really low i can just imagine how much boost you could run off of those motors.

iVteC_PoWeR · #14 08-31-2005, 05:17 PM

its not just all about the compression the stock internals might not be able to take that much boost...as for the accord motors they wont have as much aftermarket support but the 2.2L and all the torque that comes with it is nice...

turtlecrxsi · #15 09-01-2005, 09:10 AM

Quote:

Originally Posted by iVteC_PoWeR

its not just all about the compression the stock internals might not be able to take that much boost...as for the accord motors they wont have as much aftermarket support but the 2.2L and all the torque that comes with it is nice...

I agree. It's not just lower compression. You need better internals to handle more boost (ie. forged pistons, etc.). I'm not even sure the Accord engines will bolt up...

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