Spec Summary
Car
1991 Honda DX with automatic, Celestial Blue Pearl/Black. Bone stock, no rust 140K miles. EPA 29/34. curb weight 2136lbs. Engine 1492cc 92 HP@6000 89 lb-ft@4500 SOHC 9.2:1 PGM-FI
Power
Engine
K20A from a JDM Civic Type R (or possibly an ITR, but same) with 6 speed close ratio LSD, iVTEC 2.0L 220 BHP@8000 152 lb-ft@7000 11.5:1
Source: JHPUSA.com
Notes: The way to go but costly. Why? The 6 speed with LSD is really needed and this bugger hauls poop! When VTEC kicks in it is mean.
Build 2 Update - added Hondata intake gasket to keep things cool.
Build 2 Update - Change transmission final gear from 4.764 to 4.052 using a Club RSX final gear set (Details).
SuperCharger (Build 2)
For Build 2 we added a Rotrex C30-94 (KraftWerks) for some additonal kick and to complement the taller Build 2 gearing. This is not a bolt in kit, except for the mouning brackets everything is custom. We will report on the final numbers in late March 2010 (Details).
Headers
SSR (Six Sigma Racing) 4-2-1 K-Series swap all stainless
Source: SixSigmaRacing.com
Notes: Requires some trimming of rear cross member. Danny is a knowledgeable guy, helpful, and will do custom stuff. Makes great power, see Dyno.
Exhaust
Tanabe Concept-G Exhaust, all stainless.
Source: RacingLab.com
Notes: Great fit and finish. Got this as it is quite (93db) but low restriction, no cops notice. To mate to the header some custom exhaust fitment is required.
Air Intake
A modified version of Karcepts EG intake uses all parts except main runner which was replaced with a Vibrant 2173 18"X3" aluminum tube.
Source: Karcepts.com and SFXPerformance.com for Vibrant tube.
Notes: This worked out awsome. Quite too until the VTEC kicks in and then wow. Brian at Karcepts is really awsome, he sells you only what you need, great support and service.
Build 2 intake - with the Rotrex supercharger the intake now feeds Rotrex and is mounted between the low and in front. A simple 19.5 inch aluminum tube with a K&N round filter 5 inch diameter 7 inch long filter (KNN-RX-2820) is mounted low and as far left as possible, hopefully to pick up cool air.
Clutch and Flywheel
Fidanza lightweight aluminum flywheel (191471 for RSX R) 8 lbs. and Fidanza 3.2 4 puck Kevlar clutch kit (391332)
Source: Titanmotorsports.com
Notes: We probably didn't need this as we found the Type R setup is pretty good. But we are happy, good grip yet very drivable.
Build 2 Clutch and Flywheel - the kevlar clutch did not hold up so well (see Clutch and Flywheel) so we upgraded to a Clutch Masters 6 puck FX400 ceramic clutch and went back to the stock Type R flywheel for durability (Details).
Build 2 Hydraulic Clutch conversion - Went from the mechanical Hasport K-Series mechanical clutch conversion to a Suja 1 Motoring Sonem EF Bolt-In Hydraulic Clutch Conversion.
Fuel System (Details)
AEM High Volume Fuel Rail 25-11R
AEM Adjustable Fuel Pressure Regulator 25-302R
AEM High Volume Fuel Filter 25-200
0-100lb Fuel Gauge
"Magic" Goodridge Hardline adapter fitting 8mm -6AN (Very Important!)
Misc AN fittings, clamps, and braided SS hose (Mostly JEGS))
Source: JEGS.com, Stan at Fast-Turbo.com for Hardline Adapter, AEM.com
Notes: See Fuel System section
Build 2 Injectors and Fuel pump- We needed to upgrade the injectors and fuel pump to handle the increased demands of the Rotrex. So we went with a Walbro 255HP pump and Inject Dynamics ID1000 1000cc injectors. This is more then needed by we were convinced (Brian at Karcepts) that these injectors really perform and the extra headroom does not hurt.
Mounts
Hasport EFK1
Source: Hasport.com
Notes: Get your MIG welder out.
Build 2 Update - We went with stiffer urethane on the Hasports (Race left and right and Extreme Race rear) to minimize movement, things are tight. Also welded up and reinforced the rear Hasport Mount.
Alternator Relocate
Karcepts KPS01
Source: Karcepts.com
Notes: Eliminates AC (forget it) and PS and relocates alternator down low for hood and body clearance. Again, Brian at Karcepts is the man.
Build 2 Changes - Relocated the altenator back to original location, Rotrex where AC was, small idler pulley to clear hood, trim right headlight hosing to clear.
ECU
Hondata K-Pro
Source: You must find a local dealer, mine was Kinetic Motorworks in Hampstead, NH (formally Trick Engineering).
Notes: You have to do this, but well worth it. Rick at KMW was great and he did the dyno-tune as well.
Auto to Manual Conversion
CRX clutch pedal assembly
Source: Ebay
Notes: Just bolt it in, although getting under the dash a royal PITA.
Dyno-Tune
Kinetic MotorWorks (formally Trick Engineering) Hampstead, NH
Radiator and Cooling
Radiator
Modified Hybrid Racing's Civic halfsize radiator (for EG)
Miscellaneous rubber mounts, and brackets to bolt to Full-Race front cross member
Miscellaneous Hoses
Source: Hybrid-Racing.com
Notes: There is no easy bolt in radiator solution for the CRX. This fit well although I had to have the top port changed to point down 45 degree to clear my air intake. Radiator has ports for Temp sensor and fan switch.
Build 2 Update - The half size radiator was struggling, with supercharging, it would not be adequite. Went with a customized Griffon Race radiator, 22X13" (18X13.25" core) double row 1.25 tube cross flow with twin Spal 7.5" Pullers VA14-AP11/C-34A. Needed a K-Tuned swivel neck thermostat housing for clearance and mounting the fan switch and temp sensor.
Intercooler (Build 2)
Bell custom intercooler 24 x 9 x 3" core. Custom plumbing and mounting.
Drive Train
Axles
Drive Shaft Shop Level 0 (for Civic EF with KSwap)
Source: DriveShaftShop.com
Notes: For normally asperated stock engine Level 0 is fine.
Build 2 Update - When we supercharged, we know we were over the recommended HP for the Level 0 axle. But we decided to run it as is and if it broke, it broke. Well it broke, during an autocross run shifting from 2nd to 3rd the axle spline in the left hub just twisted in half like a tootsey roll. So we upgraded to the Drive Shaft Shop Level 2.9 axle, not cheap at a street price of $700, but rated to 500HP.
Shifter Box
Karcepts KSM01 for EG modified for CRX
Buddy Club DC5 shifter
Source: Karcepts.com
Notes: This part requires a lot of cutting and fabrication. There may be some newer solutions, check out hybrid-racing.com. But all in all, the final product works well.
Suspension
Front Cross Member
Full-Race ProStreet Traction Bars TB_EF_PS
Source: Full-Race.com
Build 2 Update - Due to SCCA class restriction went back to the stock crossmember modified for Rotrex clearance and installed Progress solid spherical bearings for the radius rod pivots.
Shocks and Springs
Tein SS coilovers with pillowball mounts, all 4 wheels
Source: Racinglabs.com
Build 2 Update - Went with an Autocross specific setup from Ground Control using Eibach springs with 440F and 600R with Koni Yellow (sports) with billet upper mounts on spherical bearings and Ground Control adjustable sleeves (Details).
Front control arm bushings
Orijin Motorsports solid upper control arm bushing EGUCABN001(same as for EG)
Source: OrijinMotorsports.com
Front Sway Bar
Progress 22mm bar 61.1002
Source: ProgressAuto.com
Rear Control Arms
Skunk2 Lower Control Arms 542-05-0110
Rear Camber Arms
Skunk2 Rear adjustable 516-05-0500
Rear Sway Bar
Rear Trailing Arm Bushings
Special Projects Motorsports (PCI) spherical bearing
Front Strut Brace
Cusco ST (Steel) 308-510-A
Source: RacingLab.com
Rear Strut Brace
Brakes (Details)
Brakes were purchased as a kit from FastBrakes.com (Front, Rear). I am impressed with their products and service.
Front
Wilwood 4 piston caliper with 11 inch slotted/drilled aluminum hat rotors and braided ss lines, Hawk HPS pads
Rear
Converted drums to integra rear single piston caliper and 10.9 slotted/drilled rotor braided ss lines and emergency brake cable Hawk HPS pads
Master Cylinder
Upgraded standard 13/16" to a 15/16" 90-91 Civic EX 46100-SH4-A11
Proportioning valve
90-93 Integra 4040 46210-SK7-Q01
Steering Rack (Build 2)
Quaife quick ratio rack (18.6 at 3.8 turns lock to lock to 2.8).
Wheels and Tires
Wheels
16 X 7 Volk Racing TE37 Titanium Gunmetal 42mm offset
Source: TireRack.com
Tires (current)
Bridgstone Potenza RE-11 205/45R16
Source: Town Fair Tire Salem, NH
Build 2 Update - For race day we have a set of 949 Racing 6UL 15X9 front with Hoosier 275 35 A6 and 15X8 rear with Hoosier 225 45 A6.
Interior
Shifter knob and boot
Knob - 2007 Civic Si shifter knob 54102-SVB-A00
Boot - Redlinegoods.com CRX leather shifter boot
Emergency brake
Momo EBrake handle PSADP and Momo EBrake boot, Black PSBOOTC
Source: LTBMotorsports.com
Pedals
Momo Stealth Pedals: Momo STE1112
Source: LTBMotorsports.com
Carpet
Molded Carpet 8945-Graphite/Ebony Plush Cut Pile
Source: StockInteriors.com
Notes: Aftermarket carpets get some bad press, they are not bad for the $ you just have to do some trimming and fitting.
Roll cage
Autopower 4 point race bolt in
Notes: The bar does not clear the inside door panels on the auto seatbelt CRX (89-91) and you must trim the panels to clear.
Seat Belts
Schroth Rallye Cross Wrap Blue
Source: HMS Motorsports Danvers, MA
Seats
Sparco Fighter Black with adjustable brackets
Source: Racing-Seats-USA.com
Steering wheel
Momo Jet Black
Source: LTBMotorsports.com
Pedals
Momo Stealth Black Pad
Source: LTBMotorsports.com
Tunes
Reciever - Kenwood eXcelon KDC-X492 CD Receiver with iPod interface and USB/CD playback
Speakers - Alpine SPS-17C2 6.5" front only
Source: Crutchfield.com
Notes: Rollbar placement kills the stock rear mounting position.
Insulation
Dynamat in key places to replace removed insulation inside firewall and floor
Electrical
Harness
Rywire conversion
Source: Rywire.com
Note: I was not impressed by their service and the product required relocation of the fuse box which in my case was OK.
Battery
Odyssey Battery 680 MJ dry cell mounted behind passenger seat
Source: batterymart.com
Alarm
Its' in there but I am not giving away details.
Gauges
JDM CRX SiR Gauge cluster
Source: eBay
Notes: The USDM speedo is mechanical and will not work, also the tack does not go high enough. The downside of the JDM cluster is you must wire it in and then get used to KPH.
Shift Light/Tach
A pillar Pod mounted Autopower Cobalt DPSS Level 2 programmable shift light and digital tach
Exterior Fit and finish
Paint and body
Color: Subaru WR Blue Pearl Spies-Hecker - 24492
Source: Automotive Custom & Collision, Derry NH
Notes: Awsome job on paint and body. This is the one part we did not do ourselves. We deviated from USDM stock and painted all the trim, moldings, mirrors, bumpers the same pearl blue for a cleaner more modern look.
Bumpers, Trim
All USDM stock
Hood
Fiber Images JDM "Style" carbon fiber hood
Source: Fiberimages.com
WARNING!!! Many blogs on the internet point to this site claiming "this guy knows how to get a USDM hood to fit in a CRX K20 swap" THIS IS NOT TRUE! THE USDM HOOD WILL NOT CLEAR THE K20, I don't care what you read elsewhere, it doesn't work. As we have stated elsewhere on this site, the Fiber Images hood is designed for the USDM front end, but, instead of the center of the hood dropping down, it bumps up, like a JDM hood. Hence "JDM style" hood. They also made a JDM CF hood and I believe a USDM style hood, although I may be wrong on that.
NOTE: I believe Fiber Images is no longer in business. That is a shame, as the quality was top notch and some of the other brands of CF hoods for hondas look like crap.
Note: This hood fits UDSM grill and gives (barely) enough clearence for the K20.