Harley Turbo

 Without a properly designed intercooler your Harley is going to detonate, stick a ring or hole a piston and by properly designed we don't mean some shit-ass thin oil / transmission cooler passing itself off as an intercooler. Intercoolers can lower the inlet charge temperature dramatically, often 75 to 150 degrees or more! Under boost the compressed air leaving the turbo can easily be greater than 200 degrees Farenheit...and depending on the outside temperature and how fast you are going, you can cut this figure easily in half!

The intercooler dischages into our 8" diameter plenum chamber that acts as a surge tank and eliminates any "direction" the air may have before it enters our 56mm throttle body. The air chamber features an idle air control motor, an inlet temperature sensor for the RSR Fuel Injection, and a sophisticated dual function valve that both vents turbo pressure when you close the throttle as well as by-passing the turbo under vacuum conditions to aid throttle response. No, we are not going to show you the valve. The plenum is all billet in construction for safety reasons. Castings will fragment if there is an explosion, ours will simply expand like a balloon. Details, details details. Nothing like 20 years of experience to get it right. This sophistication means power and reliability.

The bike pictured is a low compression S&S 96" that makes 120hp @ only 5 pounds of boost. At 10 psi the figure climbs to 170hp. Beyond this things go exponential as the turbo will put out 30psi and the power keeps going up, past 300hp. This particular bike is ridden daily and the owner keeps it between 5 to 8 psi which seems enough to outrun everything he comes up against. If you want to race or be a 300hp Dyno hero be prepared to upgrade your engine and not do anything stupid or your pushrods will be in China because turbos do not know when to quit. If you don't have a rev limiter, get one.