Overview
The RS4 Pro 4 will be a radical departure from the RS4 Pro 3, offering a change of concept for HPI both for suspension geometry & transmission. Extensive track testing of all existing electric 1/10th scale touring cars & HPI prototypes has already been done, and the all-new RS4 Pro 4 is the result of that testing.
The Pro 4 features big changes over the Pro 3... new drivetrain, new suspension, and new steering geometry. Consistency, tuning options & drivability have all been dramatically improved. The most significant change is that the Pro 4, at the requests of our drivers & customers, uses a shaft drive transmission. Track testing revealed the benefits of low maintenance & fast acceleration that a shaft drive transmission offers.
The RS4 Pro 4 is supplied in self-assembly kit form with key items like the radio, ESC, body and tires left to the choice of the driver. The Pro 4 will use the highest quality materials & will have a high standard specification to make it a force at the highest level of competition.
Features
Woven Graphite Main Chassis, upper deck, shock towers and steering plate
Purple Titanium Turnbuckles
Carbon Plastic: Arms, Uprights, Hub Carriers, Steering Blocks, and Gearboxes
Carbide Ball Differential
Front One-way Aluminum Threaded Shocks with Bladders
Aluminum Main Drive Shaft
Aluminum Motor Mount
Aluminum Hex Clamp Hubs w/ adjustable Track (Width)
Aluminum Spur Gear Adapter
Aluminum Wheel Lock Nuts
Efficient 64 Pitch Spur and Pinion Gears
Socket (Hex) Screws and Fasteners used throughout chassis
Pre-cut Urethane Foam Bumper
Drive Ratio: 2.4375
High Quality Ball Bearings used throughout (24)
Top to bottom mounting of gearbox for precise alignment and mesh of gears
Carbon Plastics used to increase rigidity and reduce component weight for better chassis response and tuning
Adjustable, variable Ackerman steering geometry to increase steering feel and increase corner speed
Completely ball raced steering assembly for smooth steering with reduced play
Crank integrated servo saver with adjustable tension
Included ride height and droop gauge for accurate suspension adjustment.
Pivot Ball Block adjustments to maintain suspension precision and to reduce mis-alignment of the suspension pins.
3mm inboard suspension shafts for strength and 2.5mm outboard shafts for reduced weight and improved wheel clearance
Set screws used to retain outboard suspension shafts for easier maintenance
Overall lightweight chassis for best performance and adjustable ballast positioning with optional ballast weights.
Low center of gravity and centralized weight for improved cornering power and overall responsiveness.
Reduced unsprung weight for increased response and improved control