Underground Motorsports: 1998 RB26DETT 240SX 800 HP Build
 

Hey Guys,

I am (with the help of several sponsors) agressively working to finish our new build in time for the NOPI 2007 Tour.

As it has been since 2004, the car will once again be featured in the BF Goodrich Tires Booth at select locations nationwide.

I'm going to make this the official thread, and will be updating the thread over the next 6-8 weeks while we finish up the car.

Here is the current mod list, and the latest pictures/videos will be posted soon.

1998 RB26DETT 240SX
Weight: 2950 lb. (w/o driver)
Redline: 9000 RPM
Motor: R33 RB26DETT w/ RB25DET Transmission and C'S JDM Short Shifter
Cams: Tomei Poncams 260/260 Duration 9.15 Lift w/ Adjustable Cam Gears, Ferrea Springs, Retainers, Locks, and Locators
Pistons: JE 86.5 w/ Hi Performance Upgraded Rings, coated by Calico Coatings
Turbo Setup: Garrett GT4088R (.95 A/R) with Greddy T4 Divided Manifold
Wastegate: Tial 44mm
Nitrous: NX EFI Wet Kit with MSD Digital Window Switch and NX TPS Switch
Intake: Custom
LSD: Cusco RS 1.5 way LSD
Rods: Eagle Rods w/ ARP Rod Bolts
Injectors: Precision 1000cc x6, Greddy fuel rail
Oil Pump: Nismo
Water Pump: Nismo
Timing Belt: Greddy
Headgasket: Tomei 1.2mm
Headstuds: ARP
Main Studs: ARP
Bearings: Calico
Damper: ATI Super Damper (600-1000 HP Model)
Downpipe: Custom
Mount Kit: McKinney Motor and Transmission Mounts, McKinney One-Piece Driveshaft
Strut Bar: Cusco 40D 40mm Aluminum Strut Bar
Gauges: Autometer Cobalt Series (Boost, Water Temp, Oil Pressure, EGT, Trans Temp, Air/Fuel, 5" Tachometer)
Exhaust: Apexi Ex Mag 3.75" Exhaust
Cooling fans: Permacool (2) 12" High Perf. Electric Pull Fans, 3000 CFM
Intercooler: XS Engineering 24x12x3 core with 3” piping
Blow off Valve: Apexi Racing Max Power
Fuel system: Aeromotive FPR, Walbro 255/lph Intank Fuel Pumps x2, -8 feed line, -6 return line
Engine Management: Power FC D-Jetro w/ Dual Map Sensor Setup
Boost Control: Apexi AVC-R
Clutch: Exedy Triple Plate
Suspension: Apexi N1 V-Spec Drag Coilovers, Battle Version Rear Upper Control Arms, Rear Toe Links, Rear Traction Links, Front Tension Rods
Brakes: Underground 300ZX Calipers/ Supra TT Rotors Brake Upgrade (Front)
Stillen Supra TT Rotors (Front), Stillen 300ZX TT Rotors (Rear)
Stillen 300ZX Racing Brake Pads (Front and Rear)
PDM Racing Conversion Brake Lines (Front and Rear)
Wheels: Motegi Prototypes 18x9 (3" lip) , 18x10 (3.5"lip) Gunmetal w/polished lip
Tires: BF Goodrich (Front) 225-40-18 KD, (Rear) 285-30-18 KD
Paint: House of Kolor PBC-36 TruBlue Pearl
Aero Kit: Cwings/ GTP Carbon Fiber Body, S15 Headlight/Front End Conversion

All Photos taken during 2004 NOPI Auto Tour.

http://www.undergroundmotorsports.co...i0105cover.jpg

http://www.undergroundmotorsports.co...g0105240sx.jpg

http://www.undergroundmotorsports.co...0105240sx2.jpg

http://www.undergroundmotorsports.co...NOPI%20001.jpg

http://www.undergroundmotorsports.co...rb26240sx3.jpg (Stock Turbos at 1.1 bar)

http://www.undergroundmotorsports.co...NOPI%20011.jpg

http://www.undergroundmotorsports.co...NOPI%20023.jpg

http://www.undergroundmotorsports.co...NOPI%20032.jpg

These Photos were taken 2/2007, this is part of the Stage 2 buildup.

http://i175.photobucket.com/albums/w...alvecover3.jpg

Attachment 24025

very very very good work bro... i remember seeing this a while back on another forum.

congrats on your success.

awesome car man. hope you wrap it up soon

I wanted to post some pics of the build on my car to show it's progress level.

Right now, it appears like the car is 2-3 weeks from being completed.

It would be much sooner, but I am still waiting on parts to arrive from Japan.

Attachment 23443
Attachment 23444
Attachment 23445
Attachment 23446
Attachment 23447
Attachment 23448
Attachment 23449
Attachment 23450
Attachment 23451
Attachment 23452
Attachment 23453
Attachment 23454

And now the latest:

Attachment 23435

Attachment 23436

Attachment 23437

Attachment 23438

Attachment 23439

Attachment 23440

Attachment 23441

Attachment 23442

Not a fan of the carbon fiber body parts, but the rest of the car is amazing!

that thing is soooo sick good job with it

No worries mate, the car has been painted TruBlue Pearl.

Only remaining carbon parts are the hood, spoiler, and rear bumper.

Front end conversion and side skirts have been painted.

Awesome, then I can say that your car rocks hard:headbang2:

Nice!!

BALLIN!!!!!!!!!!!!!!

kick ass ride dude.

sex on wheelz :D

Well, the decision was made to go with a Ford C4 Tranny w/transbrake and GearVendors Overdrive Setup. This should allow the car to remain very streetable, yet a solid performer on the drag strip.

ATI transmissions is currently sponsoring the car with their Super Damper, so I am giving them first shot at the tranny.

If not, I have decided to go with Performance Automatics http://www.performanceautomatic.com/transc4.htm and the PA26107 Super Comp Tranny w/Transbrake, as this is supposed to be the top of the line performance C4 tranny on the market.

PA offers a lifetime warranty, and will replace the tranny if it fails. That speaks volumes about their quality.


After talking with Ivan @ AMS, and Dane@ Desynz Motorsport in Australia, it's a no brainer.

In Australia, they make a Cast Conversion Bellhousing to mate the RB block to the C4 tranny. This will be great, as the swap will be clean, and it should look like it belongs in the tunnel.

I'm still curious on how this car will hold up with the 4.08 OEM rearend.

No worries, as BF Goodrich is the main sponsor on the car, and getting tires has not be an issue thus far.

straight up sick.

i wish i had the diligence you have. do you have the dyno results for the 800hp?

We just made the decision on the tranny today, so there are no dyno graphs to post as the car isn't running.