![]() ![]() Our head works with a broad range of cams and pipes but some are top performers. We are happy to support.Ĭompression is set and discussed based on the intended use of the bike, camshaft used, and the cubic inches of the motor. In some cases a totally custom solution may be desired. We will be happy to discuss your goals and suggest the right package to meet your needs. The Pro Street package is designed for higher horsepower, wide torque bands, higher compression and higher lift cam shaft applications. This package is best suited for mild, bolt in cams. The Street Pro TQ package offers an economical, arid very effective way to increase torque. Fast rev times and midrange torque for passing and roll-on fun are the benefit of this big fat torque curve. Pumping up torque and widening the curve is the goal. Which porting option is best for my style of riding? Depending where you are located we can suggest high quality tuning shops. The tune and pipe are very important as well. We will help our customers choose proper matching parts and in many cases can supply a complete kit at a competitive price. The remaining parts that are matched with the heads are equally important. Optimizing the head is only one component that no longer is a constraint to added power and torque. We post dyno results in order to show what others have achieved. How much power will your heads make on my bike? We show average flow numbers, not just peak, which are another important factor in the performance potential offered by the heads. Higher airflow is no guarantee of added power and torque. We use the bench to verify results, a QA function, not to advertise. That said we use our own fixturing that may not be the same as used by others therefore results may vary. Our bench is calibrated using PTS calibrated orifice plates and we go to great lengths to assure our flow numbers are accurate. We own a Saenz S-600 that has been improved with higher power motors to allow testing up to 50” H20 pressure. Let me be clear however this is a move to improve turn around time and minimize the amount of arduous labor not as a product performance enhancement. I have no issue with CNC and frankly may look into buying a machine in the future. I have established dimensions I use and consistently can duplicate the product as verified on a flow bench. Nothing in my opinion! Both can work well.Īt this time all of our heads are Hand Ported. What is so great about “Porting by Hand” verses CNC porting? The ports have changed, the parts are different and the machines / tooling used to perform the work are improved. New guides are provided on all but the “Blueprint” packages and flow sheets provided again for all packages except the “Blueprint”. Our current “Street Pro” package for example performs equal or better than the original “Pro Street” head work and does that at a greatly reduced price. I have done flow development and dyno testing and changed the product to better align with the market and riders needs. Why the name change from Head Designs by Dewey?Īfter 6 years in business simply stated our product is very dissimilar to the original Deweys product. A small percentage of what we do is serious performance work for the riders that want to enhance the power beyond just a better torque curve. Most of our customers are interested in just fixing the torque curves so the bikes have a much better feel of power stop light to stop light or on the road passing a truck or in similar situations. They come from the factory in a very detuned state and with some sensible upgrades they can provide a much more enjoyable riding experience. We want to help riders put the fun into these motorcycles. What method should I use to ship my heads?.How should I pack my heads for shipping?.Should I remove any parts from my heads before shipment?.I’ve seen cheaoer porting services, what makes yours worth the money?.Do you offer any type of “Tech Support”?.What other services do you provide? Can you Bore and Hone cylinders?.How long will HD Street Performance have my heads?. ![]()
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