Moving forward with our friend Ron’s ’11 Dyna, last issue we discussed some of the main components that make up the Trask Performance Turbo kit. In that article we also showed you some of the modifications that were made to the lower end of Ron’s bike to help it withstand the additional power upgrades that would eventually be added (new cams and bumping up the displacement). Those modifications included welding the three-piece crank assembly and converting the straight roller bearing in the engine’s left-side case to a more durable tapered Timken roller bearing setup. While not required when installing one of Trask’s bolt-on turbo kits, taking care of the lower end will help Ron keep his peace of mind when he’s finished hopping up the engine and really starts flogging the bike.
Before we get into the installation of the turbo, we’ll give those of you that missed the previous article a quick recap on how this system works. A turbo system can increase power by its ability to stuff more air into the engine. The turbo system is mounted on the right side of the bike and interconnected between the engine’s intake and exhaust ports. An exhaust manifold directs the spent gasses from the engine’s exhaust ports to the turbo housing. Within the turbo housing are two impeller blades (a turbine wheel and compressor wheel) with a common shaft running between them. The velocity of the gasses spin the turbine wheel, which turns the common shaft and compressor wheel connected at the other end. As the compressor wheel spins faster and faster the air becomes compressed, charged air. The charged air exits the compressor housing at a higher velocity, then makes its way to the intake and stuffs the cylinders with more air. More air, a little more fuel, and you can create more power.
Now follow along as we show Anaheim-Fullerton Harley-Davidson Tech Matt Cortez install a Trask Turbo on Ron’s Dyna.** HB**
Anaheim-Fullerton Harley-Davidson **
(714) 871-6563 | harleyfullerton.com
**Zipper’s Performance **
(410) 579-2828 | zippersperformance.com