CRX engine swap
Well I don't really plan on doing much "racing". I want something quick but id I want i can put it on the stip and get a nice 1/4 time. I rather just get and engine whole and do some mods to it. I dont want to swich heads, I want to do springs, valves, cams, pistons, port and polish. I want the engine to be able to handle what i want from it. I few bolt ons like, pulley, intake,wires, exhaust etc,etc.... I'm thinking maybe I should scrub the turbo and do a Vortec super charger and maybe like a 50 shot. I'm think the zex system that is computerized. Let me know if this is a good set up, give me input and or correct me if im wrong, I want to do this right. Thanks :naughty:
If your plans are turbo, LS is quite suited for it. There's a couple reasons to stay away from the B20b/z as well.
Also, as far as VTEC and turbos go, overlap can hurt your power some, but the head designs of a VTEC engine far outweigh the disadvantages that can be compensated for with cam gears.
- The block designs betwen the B20 and B18 are very similar, but the B20 has less block webbing for strength
- A B18 can be bored out to 2.0L and still be stronger than a B20
Also, as far as VTEC and turbos go, overlap can hurt your power some, but the head designs of a VTEC engine far outweigh the disadvantages that can be compensated for with cam gears.
__________________
-Harry
AIM: NDcissive
CRX and Pre '92 Civic, Engine Tech and Tuning, & Track and Autocross Forum Mod
-Harry
AIM: NDcissive
CRX and Pre '92 Civic, Engine Tech and Tuning, & Track and Autocross Forum Mod
Originally Posted by Reason
Oh yea and another thing. The GSR motor, what should I drop in the CRX? I don't know how but is it like first Gen. and second Gen.?
A) Leave the car OBD-0 and run a B16 ecu (pw0/pr3), with some tuning on the fuel, perhaps a custom chip and some electronic or relay magic to activate the GS-R intake manifolds IAB's(intake butterflys).
B) Convert the CRX to OBD-1(easier than OBD-2) and run the appropriate ECU, being a p72 or a chipped p28.
Either way you've got some wiring situations to deal with to do you swap.
Originally Posted by Reason
I want a GSR engine, and I want to super charge it(vortech) and a few others things too.
If you use a roots style S/C(JRSC), you will have ZERO clearance at the firewall and to be honest you'll prolly have to dent the firewall in to keep the S/C from banging on upshift/downshifts/generall engine torquing. If you're thinking of going with the centrifugal style S/C(Vortec), you can just hang that up right now. There isn't enough room to hang power streering off the front of a b-series swap ina CRX, let alone a GSR, and the Vortec kits take up a crap load of room on either side. You'll end up most likely having to mod the head light buckets for cleanace. Granted it could be done in either case, it would just take lots of creative engineering and some $$$.
If you decide to do the Turbocharger thing, then good for you, but there is a whole big can of worms too. Been there an done that. A GS-R engine stands taller and more forward than the other B-series swaps. You gotta hang a big ole turbo and manifold off the front of your engine, route the exhaust and intercooler piping past the very restictive from crossmember. When I say restrictive a mean that moderate N/A headers won't clear the x-member with b-series swaps. The JDM SiR CRX/Civics had a factory x-member that was designed differently to allow the proper cleanrace. The US versions never having B-series engien factory, didn't get this.(unesless tidbit of info)
With either i'm not evening gonna talk mention fueling, suspension, proper tuning ect, becuase thats a whiole different essay. And Honesty It doesn't take that much power to propel a CRX down the track. Nothing against a GSR engine, but i've seen B16 w/ bolt-ons and slicks rip 13 second 1/4 mile times, I've seen a cobbled together B20/vtec(b16 head/b20 block) with some bolt-ons run a 12.6 on slicks. So You may not wanna dismiss the idea of running an LS or B20 just yet. Personally i'm an LS man just because they are much easier and cheaper to get parts for than VTEC engines, they also came in an OBD-0 flavor so the wiring can be very simple with the right parts. Both LS and B20 can be converted to VTEC if thats your thing. It's all just how smart you want to do it, and how many times you wanna go through different setups before you find something that reliable and that works.
Cheap, Fast, or Reliable. Pick two.
So u are saying an LS engine will fit better than a GS-R engine? :thinking: If so My friend is selling his toatled 2000 LS. Should I make him an offer on that? Its got like 40,000-45,000 miles on it. How much do they usually go for???
Soubds like a decent price if the engine is still in good working order. However you're won't be able to use the hydrualic clutch transmission that comes with that car in your CRX becuase the CRX chassis uses a cable clutch tranny. Also that car is OBD-2 and you really don't want to convert to OBD-2 just to use that computer. Also the electonics on that engine(wiring harness, distributor, injectors) aren't compatible with your CRX either. So what it comes down to is you're paying $1600 for an engine that you're gonna have to run around and source parts for. I'm not ure I would get it because you're gonna have to sell of that hydro tranny and buy a cable tranny as well. Sounds like a headache to me.
You haven't told us what trim level your CRX is either. That'll also determine how much wiring work you'll have to do. Let us know man,
You haven't told us what trim level your CRX is either. That'll also determine how much wiring work you'll have to do. Let us know man,



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