i was m8 i turned preload down 2 10psi this morning seems 2 of calmed it a bit...but yep i am running a std turbo with a new -31, but its gotta be ready for going bang cos ive had the car 7yrs and they guy before me had it 4yrs and its never been changed, but the engine is itself is new, std 1600cvh and done 2k....

it was good fun on the way home tho grimme (lucky i think 2)

Cheers ajc, im going to john noble tuners soon to get it all sorted cos it shouldnt make that noise surely.....