[TR] TR6PI camshaft and US spec variances

[John Macartney]

When power output dropped from 150 to 125 with the introduction of the milder 
cam, the factory claimed it had improved torque. IMHO I always felt the earlier 
PI car had more torque than the later one. Drove many versions of both PI 
varieties, as well as the US spec variant, and the only thing about the later PI 
variant was it was certainly a smoother running car and better in heavy traffic. 
The key reason for introducing the 125bhp car was that the cam made the PI for 
Germany and France a little better for early emission control requirements in 
those countries and as those regulations were soon to go into more Euro markets, 
it was decided to make the car 'fit' forthcoming legislation.

Jonmac