Some notes on the Piper 270 VVC exhaust cam

I thought that someone would like to see a Piper 270 exhaust cam.



This is standard VVC exhaust cam (top) and a Piper 270 (bottom)





The Rover part has a code cast into it, the Piper is blank;





The Rover has a part number on it, the Piper does note;





The rover has a blank cam pulley boss





The Piper has 270 and a code which reads (on this on) 113;





These next two are poor work on my behalf, but it is hard to show the lobes in a neutral position

Std:





Piper:





If you close your eyes and feel them you can feel the difference - the flanks of the 270 do feel thicker - but this is difficult to explain in words.





The lobe widths are as shown:





The lobe + radius of base circle (in mm) are as shown:





The cam only has longer duration, not higher lift by the looks of it.





When my V blocks arrive i'll gauge them up for angle vs. lift.

This will be a while though.

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