Got the 40mm tb fitted finally on sat night, first drive was down to surrey (the plan was to run it in) pulling up the road felt so much smoother off boost, but the second I came on boost (or full throttle) the car will pull back quite violently and start popping like mad, this is only on full boost if I keep boost at about 0.2/0.3 bar it will be fine (not as quick as normal but ok non the less). Not sure if the TB is to blame have checked all pipes and all seems fine ditto electrical connectors, not sure if it just needs setting up again for the bigger volume of air that’s probably getting in? or it could be to do with the fact I have most of my exhaust gasses going out a leak between manifold/turbo join, but cant see how that would affect it (is boosting fine – albeit a lot slower than normal according to the boost gauge) think im either pulling manifold/tub join apart tonight or trying the 1.1 tb again, not sure where to start, what do you guys think?
Edit: is also alot smoother at higher revs, most noticeable is at about 3-5k where it is very rough and jerky and also backfires alot with loud pops
Edit: is also alot smoother at higher revs, most noticeable is at about 3-5k where it is very rough and jerky and also backfires alot with loud pops