CLEANSPEED Drivetrain

Ricky Wester

Agenda

• Project Goals• Project Constraints• Overall Design• Breakdown of Parts• Conclusion

Project Goals

• RWD Package– Increase traction– Lightweight

• Deadlines– June 1, 2012:Parts Spec’d– July 1, 2012: Orders Complete– September 1, 2012: Parts Arrival

Constraints

• Budget: ?• Rules– 3.5.2.3. • Any transmission and drivetrain may be used.

• Geometry Constraints– Differential mounting to frame– Location of upright and rear hub

Overall Design

• Rear Wheel Drive– Chain driven torque bias differential– Tripod hollowed out half-shafts– Aluminum hubs w/ integrated tripod housing and

floating brake rotor

*Part Drawing from RCV Performance, Picture from Taylor Race Engineering

The Goods

• Tripod Steel Axle Kits ($1,100)– 4485 – Quaife 27 Tooth Honda 1.17 lbs (2)– 4672-TA – Inner Tripod joint .33 lbs (2)– 5278-TA – Outer Tripod joint .32 lbs (2)– ½” Bored Half-Shaft – By Length ~1.5 lbs (2)– 615-3 – Tripod Boot (4)

*Parts drawing and prices from RCV Performance 2012-2013 FSAE Catalog

The Goods

*Parts drawing and prices from RCV Performance 2012-2013 FSAE Catalog

The Goods

• Front Hub Assemblies ($1,250)– 5116 – Front Hub .55 lbs (2)– 5124 – Titanium Wheel studs .03 lbs (8)– 5117 – Hub Nut .05 lbs (2)– 5108-RA – Floating 10” Rotor .95 lbs (2)– 5109 – Rotor Floater .27 lbs (2)– 5141 – Rotor Pin .01 lbs (12)– McMaster: 97633A180 – Rotor Pin Snap Ring (12)– Timken 08125 – Bearing .35 lbs (2) – Timken 08231 – Race (2)

*Parts drawing and prices from RCV Performance 2012-2013 FSAE Catalog

The Goods

*Parts drawing and prices from RCV Performance 2012-2013 FSAE Catalog

The Goods• Rear Hubs Assembly ($1,700)

– 5231 – Rear Hub .75 lbs (2)– 5239 – Hub Nut .1 lbs (2)– 5124 – Titanium Wheel studs .03 lbs (8)– 5245 – Track Holder .01 lbs (2)– 5244 – Tripod Track .01 lbs (12)– 185-10C – Tripod Boot (2)– McMaster: 91251A435 – Holder Bolts (6)– 5284 – Floating 220 mm Rotor 1.29 lbs (2)– 5141 – Rotor Pin .01 lbs (12)– McMaster: 97633A180 – Rotor Pin Snap Ring (12)– Timken: L610549 – Bearing .96 lbs (2)– Timken: L610510 – Race (2)

*Parts drawing and prices from RCV Performance 2012-2013 FSAE Catalog

The Goods

*Parts drawing and prices from RCV Performance 2012-2013 FSAE Catalog

The Goods

*Parts drawing and prices from RCV Performance 2012-2013 FSAE Catalog

Floating Brake Rotors

The Goods• Taylor Race Engineering

– Honda Torque Bias Differential – Sealed ($1,394)• Part #: INV-02000431• http://www.quaife.co.uk/shop/products/qdf7zr

– Sealed Bearings ($47)• Part #: INV-020004311

– Chain Drive Sprocket ($50 - $100)• Dependant on final drive ratio

• Custom Mounting Brackets– In – house est. $400

• Total: $1,900

The GoodsQuaife – Honda Torque Bias Differential

Photo from Taylor Race Engineering website

Photo from Quaife Engineering website

Conclusion

• Final Cost $5,650 + shipping• Benefits– Lightweight FSAE proven– Off the shelf, stocked part = fast turn around time– Sealed differential with no added machining costs