Ok, I *think* I know the answer, but time to check, before I spend $$ etc
R33 '96 Series 2
T3/4 Hibrid Turbo
FMIC
Stainless Ducting
3" high Flow, all the way through
Mines ECU
Adjustable Fuel Reg
Pod
Etc, Etc.
When I'm using the engine to brake, usually when i've been doing quite a few k's at motorway speeds (100-110), I get random pops/almost backfires. Usually only one or two, when slowing down for a roundabout etc.....
It's noticable to me, but not to an uneducated passenger, so they're not too noisy.
I think it's because i'm running rich atm, and am going to be changing ECU & getting a retune done soon (Which should fix it, and a little more power, I hope)
(IIRC, I was running 12.5's on the mix at the last dyno)
Any other thoughts?