QUOTE (JBriggsK9 @ 28 Dec 2004, 16:13)the TRSF chassis will fit the C5 ( I have one done up ) I am not sure on the Viper
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The car is set in its shortest wheelbase and the rear fender needs a bit of a touch=up with the Dremel drum. The front of the steel pan may be ground to follow the body contour while it is not absolutely necessary.
The car is quite twitchy and has way too much grip with magnets, since it is basically very top-heavy.
With no magnets, the challenge is to make it to slide without tilting. For this, a massive amount of sheet lead is added to the front of the car until the rear end begins to over-steer.
All in all, the Viper body does not do well on the TSRF chassis. As an example, a GB-Track 917 set on the same chassis is a true rocket, virtually unbeatable but by dedicated Eurosport cars with tiny wheels on routed tracks. A Ninco Mercedes CLK DTM on the same chassis is also very fast. The Viper is OK if driven at a quieter and prudent pace, and obviously the chassis does not like this body and vice-versa...
As far as motors, the TSRF motor is designed to run on 12V-5A clean power, not on the 16 or 18V-.08A wall packs supplied with most sets nowadays, thanks to legal obligations imposed onto manufacturers.
The TSRF motor is a "FK" series motor like in the FLy "Racing" cars. I never liked the "S" can with their huge end bell bearing housing. It is NOT possible to fit a "S" can in the TSRF chassis, but it is easy to fit any other "FK" series motor such as a milder Plafit Fox or similar.
For the TSRF motor we recommend the use of upgraded power supplies such as Pyramid 6-15 variable with 25A available as well as PM electronic controllers. We run the 1/32 scale cars at home at about 9 volts, the 1/24 cars at 12 volts. They are plenty fast at that voltage, but most S-can equiped cars crawl under that power except for the Slot.It cars that love it too.
Regards,
Dok Pea