The Dog II


Dog II dash

The Sparco steering wheel is on a quick release mount. The buttons are push to talk switches for the radio and function change switches for the Stack Dash.

Technosquare also rewired the car eliminating nearly 40 lbs of excess wiring. A Stack Electronic dash replaced the factory dash and eliminated the need for a bunch of gauges; this simplifies the car and saves a bunch of weight. A Safecraft 5 lb halon fire system with triple discharge nozzles was installed to reduce fire hazards. A super lightweight Odyssey 680 drycell battery was mounted to the passenger side floor using a Password JDM dry carbon mounting bracket. This trick alone saved over 40 lbs.

dog II interior

The drivers cockpit is all racecar and all business, Sparco steering wheel, lightweight Sweet Manufacturing steering column, B&M shifter, Stack Electronic instrument cluster, Sparco pedals and Tilton brake proportioning valve

With the car now a functional roller, it was shipped to Brian Kono at Afterhours Automotive for finishing fabrication. Brian built a carbon fiber dash for the interior and fitted custom Shields hardcoated lexan windshield, rear and side windows. A VIS carbon rear deck was fitted and reinforced to accommodate an adjustable GTP carbon rear wing. A VIS carbon hood was modified with a large vent to provide a hot air exit for the big Koyo radiator. This top exit vent significantly improved the vehicles aerodynamics by preventing air from becoming entrapped in the engine compartment or flowing underneath the car where it could create lift. By allowing the air to exit over the top, the vent also allows a greater pressure differential to exist between the top and bottom of the belly pan and splitter increasing front downforce..

Dog Car rear

The wing and the diffuser add about 150 lbs of downforce at 100 mph.

The GTP carbon wing sits on top of a reinforced VIS carbon decklid. There are also aluminum braces to support the wing under the decklid as well. Extensive use of carbon fiber has gotten the weight of this 2700 lb car down to 2240 lbs.

The Afterhours Automotive fabricated rear diffuser features these 4 vortex generating strakes to provide more downforce with minimal drag penalty. The exhaust blows right in front of the diffuser to argument its flow and created even more downforce.

A Stillen airdam is actually shaped well for the generation of downforce. A Carbon splitter and bellypan add to the functionality. The front end is held on with Dzus fasteners and can be removed in seconds. The VIS carbon hood has a huge vent and ductwork to divert radiator air up and over the car. This reduces drag and increases down force. Afterhours Automotive fabricated the towhook. Although some might call this ricey, it’s all 100% function and will kick your ass.

The JWT POP charger gets force fed high pressure air from the splitter leading to the box connected to the front airdam vent. This gets both cold and ram air.

Brian modified a Stillen airdam with dzus fasteners so it could be easily and quickly removed and added a quick-release belly pan and a carbon front splitter to give front aerodynamic downforce. In the rear of the car, an Afterhours fabricated diffuser with vortex generators gives additional downforce with no drag penalty. A NACA vent in a rear window feeds air to the Parket Pumper driver air supply system.

naca duct
parker pumper

This NACA duct provides drag free positive pressure air for the Parker Pumper fresh air system to supply the driver with forced fed cool, dry filtered air.

SR motors are known for their high oil temperatures when run under racing conditions. To keep a racing SR alive, it is important to keep the temperatures low. Motul 300V racing synthetic oil keeps its cool even when hot. Afterhours offset mounted the Koyo racing aluminum radiator to make room for a Setrab oil cooler mounted vertically on the passenger side of the radiator and built ducting for the radiator and oil cooler. The cooler is plumbed for a remote oil filter using Aeroquip lines and A/N fittings. A ram airbox for the JWT POP Charger was also built using air taken from the drivers side vent in the airdam. A lower control arm brace tying the lower control arm mounting points to the central crossmember was fabricated. All of this work reduced the cars weight to 2240 lbs.

Afterhours Automotive offset the radiator so the Setrab oil cooler could be mounted next to and behind the Koyo radiator in the ducted box. This made it much less prone to damage.


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