CBV or not CBV? - Pre Tune.

[jellison]

Looking to get my R mapped in the late summer / autumn.

Been reading up a little on people tunes and what done to get there. I do not want to go overboard (keep it fairly simple as worked on last one (T5), with just a Jetex and a Tune (Southwest in car Tech nr Bristol), where that gained ~60bhp and similar torque with just this on a 150k car (one owner so history known (father) - car was a missile!).

Have read the CBV has a diaphragm that can fail (my car is 89k). What is the value in a) popping in a yellow spring and replacing the std diaphragm with a new OEM one at the same time (http://www.vivaperformance.com/cbv-u...ement-springs/) or b) or replace with an after market CBV (i.e. ipd / viva, etc ala http://www.vivaperformance.com/cbv-u...r-v70r-s60-t5/).

Only mod planned for the engine pre tune, will be and IPD cat back exhaust (new plugs and possibly coil packs) and the above (maybe some vacuum hoses).

Presume tuner needs to know all what has been done before working his magic.

I'm leaning more towards changing spring and new OEM Diaphragm.

Opinion...