The Ultimate Lexus SC300 build thread by LCSC

4 minute(s) of a 26 minute read

Here are a couple from the last Super Lap event.

8-21-2010

Updated 08/20/10

This last two week I put a built shortblock in my car. The engine was built buy CGM Motorsports. It has JE pistons that were coated and also custom CGM rods (they're suppose to be stronger than the stock ones and a lot lighter). They also did all the machine work. The pictures don't show how pretty the engine was. Also I was able to sell my differential for a good price so I was able to get a new TRD LSD and put it in a GS400 diff all and all for a really good price. I also got my fuelrail welded so I never have to worry about the fittings leaking. I also welded a fitting onto my fuel line so no more hose clamps. I also installed a B & M short shifter. I pretty much cleaned every hole with a tap and every nut and bolt with the same, or I put new bolts, It kind of drug on and on but this is the last time I hope to do this (on my car) for a long time and just didn't want to worry about the little things. I mostly did the work at night after the kids went to bed. I've put about 500 easy miles on the car so far and everything seems good. Ever since I put the 6spd in the car with the twin carbon clutch it's official the car is a beast and no longer a luxury sports car that is pretty fast. It's pretty hard to drive smooth and the sound of the clutch is hard to ignore. 90% of the time it would be better with the setup it had on the dyno day and the May super lap, but for that 10% I would say it is all worth it.

Complete mod list:

Engine:

• JE Pistons Turbo dish 86.5mm bore

• JE Proseal Rings 

• PHR modified oil pump

• ATI crank pulley

• ARP Main stud 

• King Main, Rod and Thrust bearings

• New Freeze Plugs

• CGM PRO I-Beam rods 5.590" or 142mm Length

• Rods have ARP 2000 cap bolts

• rod weight 519 grams

• Pistons coated with Calico Performance coatings CT-2 and CT-3

• Line hone

• resurface deck of block

• Bore and Hone with torque plate

• Micropolish crankshaft and chamfer

• Balance rotating assembly

Build specs:

• main bearing clearances .0024" to .0026"

• rod bearing clearances .0024" to .0027"

• Piston to wall clearance .0045"

• ring end gaps

• top ring .024"

• second ring .019"

Head:

• Ferrea duel springs w/titanium retainers

• Sound Performance Modified intake 40% larger 

• Stock HG

• GSC S1 cams (269 duration)

• PTE 6262 DBB turbo w/4" straight exhaust

• 630cc injectors

Drivetrain:

• GETRAG 6spd transmission w/TRD mount and billet shifter bushings

• RPS Carbon Carbon clutch w/billet PP and lightweight flywheel

• One piece drive shaft by Snap Performance

• GS400 Differential 3.26 gears w/TRD LSD

• Short Shifter

Suspension:

• KW V3 coilovers

• Supra TT Stock brakes w/Carbotech x12 & x10 pads

• Titan sways

• Daizen steering rack bushings

• 18" CCW Classics with 265/35 NTO5 front & 305/40 555r Nitto tires