One thing to remember when looking at Harley dyno numbers is that they are showing HP and Torque ratings at the rear wheel in 5th gear. After the Primary drive, clutch, transmission, and drive chain or belt.
My 2003 Twin-Cam 88 C.I. Harley when stock came out at 64 HP at 5400 RPM, again at the rear wheel. The same bike made 76 HP at the crank with stock exhaust and air cleaner. After changing only mufflers and switching to a K&N air cleaner I made 77 RWHP (rear wheel HP) at 5200RPM, then 6 more (83) RWHP once I added a new ignition and tuned the stock 38.5mm CV carb. I have no problem believing Hog-Air's claim that their 95 C.I. engine makes 108 crank HP at 211 lbs installed. http://www.hog-air.com/motor-page.htm My engine dyno runs were all done at Daytona Harley except for the one at the crank, it was done at AMI (American Motorcycle Institute) http://www.amiwrench.com/ All of this said, the HD motor can NOT compete with the Corvair on price. At $9500 for a 108HP engine I'd say you get a lot more suck, squeeze, BANG, blow for the buck from the Corvair. Sean C. -----Original Message----- >Date: Thu Jul 14 19:29:13 PDT 2005 >From: "Dennis Mingear" <dennisming...@yahoo.com> >Subject: KR> RE: hog air >To: "KRnet" <kr...@mylist.net> > >Talking about motorcycles can be very emotional at >times, but here I go anyway. > >The Harley Davidson motor is good for what it was >designed for, cruising down the road turning moderate >rpm's. The motors are heavy for the amount of power >that they produce and very expensive too. People are >always surprised by the horsepower that they produce >in stock form as measured on a dynometer. > >Here's a link to one of the best Harley performance >sites out there that gives many dyno runs by motor >type. Just click on the motor that you are interested >in and then scroll down the page for the dyno results. >These tests were run to measure stock horsepower prior >to adding performance modifications to the motor. >Additional dyno runs are shown to give you an idea of >just how much horsepower various mods provide over a >stock motor. > >The link; > >http://www.nightrider.com/biketech/hplist00.htm > >If you go to the home page of this site and scroll >down you will see a series of horsepower ratings on >the left hand side of the page with brief descriptions >to the right of what was done to the motor to get >additional power out of it. > >Denny ...
