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HPI Models
Nitro RS4 Setup

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Nitro Sedan Racing Setup:

Front:
60 wt oil, #2 pistons, 0.5mm spacer, 64.3mm total length
Yellow Progressive springs, Pro 2 Graphite Front Shock Tower, B-4 shock positions
1 degree negative camber, 10 degrees caster, 0 degrees kick-up, 0 degrees toe-in
Camber link in stock position (using Pro 2 Front End Conversion, see Nitro Racer Racing Tips)
Universal dogbones
33R tires with Red (medium soft) inserts

Rear:
30 wt oil, #3 pistons, no spacers, 66.5mm total length
Yellow Progressive springs, Pro 2 Graphite Rear Shock Tower, A6 shock positions
1 degree negative camber
Camber link in #3 position
Universal dogbones
33R tires with Red (medium soft) inserts

Options and modifications:
Nitro Star Pro 12R SC engine with slide carb
HPI aluminum header
Novarossi tuned pipe for .12-.15 engines
14T clutchbell (single speed)

3mm Super Chassis
Woven Graphite Upper Deck
Raised front and rear roll center with 4mm of washers under bulkheads and aluminum posts
Fuel tank modified to remove primer (replaced with fuel line nipple)
Bottom fuel line nipple flattened and blocked

The raised roll centers front and rear allow the use of softer springs, and give the car more traction overall.

Good luck racing!