My DD 1991 CRX DOHC ZC Turbo HX35

Then basically I wanted more power so I got a sleeved DOHC ZC block and build it up. The bores were tapered and out of round but I decided to just go with it. It smoked pretty bad, and also had valve guide issues. I swapped another DOHC ZC I had lying around into it. Then I decided I needed some 75.5mm+ pistons so I could bore it out to fix the issue, but I would have to get some custom made ones.

Repainted it last summer, but the color was different than what it was suppose to be (little darker orange). I might repaint it this summer with some Honda OEM Orange paint, so I get the exact color I want.







Got another DOHC ZC block I had and put the pistons from the last engine into it along with some other parts. Then got the whole turbo setup on after a little NA break-in. I basically made most of the turbo parts, so it took quite a bit of time.






Here is how it sits now, drives great but will be seeing more boost in the near future.

List of what all is done to it at the moment:

Engine:

DOHC ZC
75.5mm Race Engineering/Wiseco Forged Pistons
Eagle Rods
GSR Throttle Body
OBD1 P29 Intake Manifold
AEM Fuel Rail/AN engine bay lines
B&M Regulator
Hiprofile 800cc Injectors
Cometic Head Gasket
King Bearings
B16A ARP Head studs
All New Honda OEM Gaskets/Seals/Sensors
OEM Valvetrain and cams
Powdercoated Wrinkle Black Valve Cover/Intake/Cam Gears done by yours truly.
Hasport 88A mounts
Wire Tuck/Battery relocated
Custom 2.5" exhaust with Dynomax muffler in rear, generic muffler in the middle and Catalytic Converter (yes real cat, I passed emissions in this car in March)
CXracing 1/2 Radiator


Transmission:

Si Cable Transmission with phantom grip LSD, will be rebuilding and installing Mfactory LSD this Summer.
ACT Xtreme Clutch with ACT Flywheel (12lbs IIRC)

Suspension:

Omni Power Coilovers (10Kg/mm in front and 12Kg/mm in rear)
PIC Rear Lower Control Arms
DA Rear Disc Brakes
Energy Suspension Bushings all around.
K-tuned Traction Bar

Interior:

Si Interior
Civic Si passenger seat and Scat Race Driver's seat
Prosport Gauges with one button heater
Roll Bar (Guess you would call it a 4-point now)
OBD1 converted on Neptune RTP (tuned by me)


Exterior:

Wings West Urethane Body Kit (thick rubber, stronger than stock or else I wouldn't of got it)
Summit Racing Orange Metallic paint
XXR 002 15" +38 offset

Turbo Setup:

HX35 Turbo
Custom Manifold with true twin scroll setup
Custom 2.5" intercooler piping
Custom Oil lines
Custom Downpipe
Go-autoworks Medium Intercooler
Turbonetics Raptor BOV
Tial 38mm Wastegate with 10psi spring




That's all I can think of off the top of my head. I basically did everything myself, I don't like other people working on my car so I had to learn how to do everything. Right now I street tuned it and drives great, starts getting into boost around 2500-3000rpm and full boost comes around 4500rpm, you gotta love divided housings

CRX is running good, could use a little tuning at part throttle though. Here are some things I fixed:

-Vacuum line from compressor housing to wastegate, then added another fitting on the charge piping by the bov so the hose is only 1/2 foot. Instead of all the way from the compressor housing to the bov.

-Did a boost leak test and the BOV flange was leaking slightly (had a cheap aluminum screw on one, just cut a steel flange out and welded it on). Seems all good now.

-The fitting on the compressor housing was the one that came with it. I found it had a pin hole in it, then when I took it out it was some weird restrictor fitting which is probably why I had some boost creep at the top of 3rd gear and 4th. Replaced it with a normal fitting. Picture below of original fitting (opening was the size of a needle)


The To-Do-List for the summer:

-Make my 3" exhaust with 3" downpipe (if I can get the 3" downpipe to fit).
-Replace Lower control bushings, ball joints, and front brakes
-Make better radiator fan shroud (thin metal on mine)
-Replace lower injector seals
-Build a no-slop shifter (fine now, but can always be better)
-Build or just buy front stabilizer bars (from front LCA to chassis, rear traction bar)
-Get some 22x8x13 slicks and wheels
-Up the boost to 15-18psi and do some track tuning and hopefully hit some mid 11's.