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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
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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 Floating Brake Rotors *Parts drawing and prices from RCV Performance 2012-2013 FSAE Catalog
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 Goods Quaife – 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