I have seen all the reference to the different spring rates for the Forge DV's etc.
But is any one able to explain/clarify to me:
1) what does the DV do (I.e how does changing it improve performance on the car)
2) what does increasing the spring resistance do (again how does it help)
3) other than the obvious Forge 007/8 valves what have others used and their opinions on them. Also when does it become worthwhile fitting one of the larger DV's
I have a fair idea on the above. But would like some educated opinions to clarify as i would not class myself to be an expert by any stretch of the imagination and also thought it would be useful for noobs.