TDR Race engines

Tony Doukas Racing has been building and racing the RZ based engine package since 1984.  

  The TDR Race team has won many Championships over the years and perfected the performance and reliability of these components to a point that we are now in the process of creating our own complete engine packages.  

  The new design TDR RZ 350 based engine will have a billet close ratio transmission by Nova in England or Robbinson here in the USA. There are 2 versions of dry clutch setups.  Next is the different crankcases that will be available.  One is a USA made sand cast crankcase that has been heat treated, and then machined.  This will include a cassette style access that will allow for the complete transmission removal with the engine still installed in the chassis. It also will have thicker areas to allow for the larger stroke crankshafts and bigger bore cylinders to be installed. 

  The other is a die cast set that has all the beefed-up areas to allow for larger stroke crankshafts and larger bores to be installed as well.  This one does not have a cassette style access.

  The third crankcase is designed by me and machined in house.  It will be available at a later date and will be a billet modular design with all the beefed-up areas, Cassette style transmission, and the Modular design is a setup that the transmission section will be a bolt on assembly that will have options for different transmissions to be used to handle the increased horsepower of the larger engines.  The transmission that will be used initially will bet the Yamaha R6.  The R6 transmission has the same main shaft diameter allows for most of the RZ style wet and dry clutch components to be used. 

  The Cylinders are made by CP Industries here in the USA and will have a programmable Gillio teen style power valve.  We have already race tested these for years with incredible results.  Nikisil bore, large 6 petal Delta V Force reed cages, Chariot billet head, and billet intake manifolds.

  The crankshaft will be a billet balanced version with ceramic hybrid main bearings.  There will be many versions depending on the bore and stroke used to fit different classes or customer requests.  On the billet crankcase versions, the main bearing OD size can be increased to 72mm for longer service intervals. At this time with our 443cc engine we get over 1,000 race miles before replacement.  At that point I replace or rebuild the crankshaft for reliability reasons.  It is still usable for a street bike or Banshee ATV use.  

  Carburetion will be on all the prototype engines that we will be racing. We run Modified Mikuni's, Lectrons, and Smart Carb.  All will be available for purchase depending on customer preference.  We will be switching to Fuel Injection with complete traction control adjustments as we progress thru our race season.

   Ignition:   We have run PVL for years but with the newer engines we are running the Zeeltronics digital programmable ignitions with the small rotor.  This ignition is fully programmable while still being attached to the motorcycle.  This allows us to completely adjust the timing curves for all race & street conditions.  Combined with more powerful coil setups gives us more spark as well.

 Exhaust:   All the expansion chambers are designed and made in house by me.  We have been building race chambers since the late 70's and have inhouse dyno for testing.

   Data Logging:   All engine data will be recorded with AIM race dash with all the EGT, RPM, Water Temp etc. This system is expandable and will document data to further increase our knowledge of 2 stroke engines.  We run multiple probes in the exhaust, water jacket areas, fuel consumption, wheel spin, MPH, RPM, load bearing areas to test stress factors, disc brake temp, brake fluid temps, etc., and much more.  The AIM system also has complete GPS data to allow the racer to break down every sector of the racetrack and analyze the race line. With all Data stored and downloadable for future viewing.

   Click on the Engine Details button above for more detailed information on TDR race engines.