Am suprised you got it to knock with just minor boost increase, but better to be safe than sorry, 19PSI is the safe limit of the original turbo anyways - anymore than that and it just wears it out....
I can't say that when i ha my MAFAM fitted it did that much more after the turbo kicked in at around 2000rpm, tho my MAF was going out of spec so i needed to leave it at 1 O'clock... as high as 3 O'clock overfueled and caused the hestitation\stuttering at around 1500-1750RPM.
TBH the more the diesels overfuel the faster they go, and the MFAM will not provide more fuel than the ECU is ecpecting - it is only really boosting the signal within tolerances, otherwise it would be possible to use it as a tuning box...
Oh the car is indeed in good hands - but has become a bit more involved than originally planned, but that is what happens when you try to get about 80-100% more power and 50% more torque out an engine!
I *will* be doing some trackdays this year, but need to give the car a decent shakedown before so, would hate to break it again on track lol
And as a note, you could probably buy a 180 on what i have ended up spending on mods
Here is what i have done to the car so far...
Changes to Date:
MAFAM (disconnected); K4.80 Green Filter; Wingy EGR blanking kit, Downpipe, Decat, Backbox & Injectors; Donnydiesel silicone IC hoses (Roose); Donny Custom Turbo outlet pipe; ZS180 calipers and carriers; Uprated gearbox bearings; Helix Clutch; Quaife ATB; Stage 2 Hybrid Turbo @22PSI (GBE EVO D controller); Upgraded clutch Hydraulics; Partial Remap
Last Mods:
FMIC and Remap sorting
Dyno 140-160bhp & 220-260lbs-ft (estimate)
^^ it is an estimate as the clutch hydraulics went while it was being remapped.. hence the partial comment. but peak torque i saw was 260, but with chronic overfueling - it could be much higher when the FMIC is done and the remap is finished and it is properly run on the dyno...
To add to the list is wire&groove the head, and some ARP head studs, as well as a bit of porting work all round, while matt has it in bits.
With hindsight i probably would have popped a set of SDI injectors in, had a mild remap to keep peak torque below 250Lbs-ft and left it as that
but where is the fun in that, and now i will have a fairly unique ZS, tho there is a Mk2 X-power grey one on .org with simialr mods to mine - but he has some really nasty pump timing issues and is only running at stock power levels