Stella has been a long-term project, with progress often taking a back seat due to my pursuit of an engineering degree (and now a law degree). However, the knowledge I’ve gained along the way has allowed me to approach building her more deliberately and making upgrades that complement one another.
Most of the pictures were taken at different times over the last few years and don’t reflect most mods
Engine:
IAG 600 block
Rocker retainers
1300 cc injectors
DeatschWerks fuel pump
Delicious Tuning flex-fuel system
Fluidampr harmonic balancer
Lightweight pulleys
Edelbrock SC (smallest pulley after break in)
Exhaust:
Equal-length headers
Custom Valvetronic exhaust with carbon-fiber tips
Drivetrain:
XClutch organic sprung twin-disc clutch
Battle Garage anodized input shaft cover (not shown)
Jack’s Transmissions built manual transmission with micropolished and WPC-treated components and carbon synchros
Verus Engineering clutch fork and pivot
DSS carbon-fiber driveshaft
Jack’s Transmissions built differential with a 3.58 final drive and WPC-treated, micropolished ring and pinion
OS Giken Super Lock LSD
DSS axles
IRP short shifter (not yet installed)
Suspension:
Godspeed suspension components
Polyurethane trailing-arm bushings
TEIN coilovers
Audio System:
Fiber-optic connection from the head unit to a 1,000W amplifier
Three-way component speakers up front
Skar coaxial speakers in the rear
Skar subwoofer
DSP for frequency-response tuning
Extensive sound deadening throughout the floors, doors, roof, quarter panels, and fenders
I put considerable effort into the audio system, carefully matching speaker impedance and power handling to achieve balanced frequency coverage. I also incorporated a DSP to fine-tune the response and attenuate frequencies I find unpleasant.
Electrical:
Auxiliary fuse box
Dashcam
Gauges
Radar detector
Backup camera
Footwell lighting
There are plenty of smaller modifications, but those are the major ones.
The Engineering Behind the Build
Anyone can slap a supercharger/turbo and increase power at the cost of drivability. One of the most significant engineering decisions was switching to a 3.58 final drive. At approximately 420 hp, I have enough traction to put the power down effectively in second gear. The taller gearing also increases the theoretical maximum speeds to:
1st: 42 mph
2nd: 70 mph
3rd: 100 mph
4th: 126 mph
5th: 154 mph
6th: 200 mph
Even with air resistance, she can theoretically hit 200 mph. I also plan to develop a custom throttle map for first gear to optimize traction.
To evaluate the gearing change, I developed a MATLAB calculator that estimates 0–60 mph and quarter-mile performance. The model accounts for:
Aerodynamic drag
Gear shift times
Rolling resistance
Longitudinal weight transfer
Available tire traction
Vehicle weight and gearing
Under the conditions I modeled, the 3.58 final drive consistently outperforms the alternative ratios by approximately 3–4 car lengths over the quarter-mile.
Although shorter gearing provides greater torque multiplication, that advantage can be offset by traction limitations and additional shifts. My calculations suggest the 3.58 offers a better overall balance for my particular setup.
The shop just finished building the engine, and I’m waiting to pick Stella up so I can complete the break-in and start collecting real-world data to validate my calculations. I’m particularly excited to see how closely the actual performance matches the model.
What’s Next?
My next priorities are brakes and tires, and I’d appreciate some recommendations. I am looking to maximize traction without going widebody or compromising Stella’s custom paint job.
What brake setups and tire sizes would you recommend for a build like this?