trans help, 901 racing tranny Options

[porschechuck]

Hi all,
Raced at road Atlanta last month came 4th against H.O. 2.2 sixes with my 2.0 4cyl. But trans issues, running a stock '73 box. On the back straight 4th pulled barely, and 5th was just blaaaah no increase in revs. I need help! We've tigged a diff to create a locker, Mid ohio teener club thanks, but what gears and where can i buy them. thanks for any thoughts and recommendations

[john rogers]

When I had my four, both stock size and stroker I had "M - S - X" for the top three gears which allowed the engine to rev to top speed faster. Top speed is about 130 to 135 at a track such as Willow Springs or CA Speedway here on the west coast and with stock gearing I would never get out of 4th. When I went to a 2.2L six with less torque band and higher revs we had to go to "K - Q - V" which is lower geared but lets the revs work better. I would be concerned about running a locker diff when road racing as it you break an axle the car will usually turn the opposite side with little control. Most of the vintage racers out heer use either a Quaiff or GT limited slip. Good luck with the trans.