Glad youre enjoying it.
There are a few 275bhp+ 1.9 16v JTDs on here that have been around for a fair few years, so I d think youd be safe with more, obviously AFTER the clutch upgrade.
good to know I can push it..
one of my major aims was balancing throttle response and OE feel with the power numbers..if you go bigger with the turbo then I would assume you are getting into the territory of either a custom turbo manifold or retrofitting the mani from the 2.4 JTD to fit the 1.9?..one of the attractions of the hybrid is it's bolt back onto the car with no alteration to other parts required.
Because the VNT calibration has been tweaked the turbo still spools at the same point despite the 56mm compressor wheel.
with the bigger turbo there is the question of throttle response which undoubtedly the bigger the turbo the more the potential problems with lag,add the extra volume and length of the intake piping for a larger intercooler and you might find although the numbers would undoubtedly be bigger some compromises may have to be made...
I am sure it can be mapped accordingly to minimise this, but ultimately you can't bend the laws of physics..you can run higher boost of course but all I have found this does is create a larger ''jump'' between on and off boost and you can't advance the vnt adjustment to bring the turbo in earlier past a certain point...
I have tried to find the optimum point of tune between really big figures and something that is pleasant to drive on a daily basis, hence my avoidance of a dual friction clutch,FMIC, and my preference for the DMF over the SMF to maintain OE clutch feel. I do accept I may have to re-evaluate this but would prefer in an ideal world an option that would maintain the DMF and still hold 240 BHP comfortably for a reasonable amount of time...I am so on the fence on this as I don't want to sacrifice the day to day enjoyment of the car for an arbitrary number..
my other concern is that because I have the 150 unit the injectors will be a limiting factor and I have heard enough about injector problems at factory power levels without going too far..bigger injectors would definitely be required for those 250+ numbers. damien has them in his clover hence its all good
so, intercooler,bigger injectors,bigger turbo,a lairy map and 275 BHP is do-able but I am not sure I would enjoy it as much as the 225BHP I currently have and it would cost a fairly large wedge of money to achieve.
also I would have to put up with a twonky juddery dual friction paddle clutch...I would rather have less power and more drivability.
obviously this is just what i think is right for my car given my intended usage and what I set out to achieve , which TBH in tuning circles are very modest gains, however I am very happy with it!
my final point is that i also have bilstien B12 shocks with eibach springs,an eibach ARB kit and a quaife LSD, as well as performance pads and fluid. all of this stuff is as important as the power as you need to be able to get it safely onto the road and for the car to handle well...I would also say that going up to 275 BHP on one of these without going up to 330mm discs and 4 pot calipers is just stupid. your stopping power must be equal to your your engine output. this mod on a GT is probably £2k as you need to change the discs,pads,calipers and uprights to accommodate it all.
I have thought it all through and on balance have decided for me at least based on a number of factors 240 is my absolute limit.