I'm not realy fussed what people class as the 'best' flutter, as everyone (who likes the sound) has their own take on whats sounds good. Usualy, the bigger the turbo and the greater the volume of the I/C and piping between the turbo and T/B will give the longest, deepest sounding flutter, usualy on lowish boost and when partialy backing off rather than gear changing.
It also helps to have a filter right off the turbo with the shortest pipe practical.
As for AFM location, I don't think it makes a whole lot of difference where it is, but would probably give better sound with it between the turbo and T/B. Problem with this setup would be subjecting the AFM to boost, and if the log is still in place like the above pic (and plumbed correctly), you will be subjecting things to boost pressure which arn't supposed to 'see' it.
As for the BOV saving turbo's
![Rolling Eyes :roll:](./images/smilies/icon_rolleyes.gif)
unless you are running a 40yo turbo or something designed for a diesel engine, IT IS A CROCK OF SHIT!
BTW, click my lower youtube address in my sig to hear/see my flutter. Best at 4 - 5 seconds.
Damo