Turbo selection

[n0v0s]

They do fair much better being VNT, a GTB2260VK is more than doable (talking spool up at around 2200rpm no issues) but it will surge...

And yes, turned the actuator upside down... Takes a bit of playing with to get right, the VKs are a nightmare being electronic originally, they have no vane lever stop, so they will go to FULL spool position, where you strangle the engine, make it surge like hell etc. You need to be careful with your foot as it does tend to surge if you try and give it too much too early, it's useless if you aren't going to drive around with mechanical sympathy. If anything a 2260VK is a bit big if you want something reliable, it'll put out MASSES of air at low RPMs, you're going to have big surging problems unless you severely modify things in the head and manifolds or get it set up impeccably well... Or you may as well just get a big wastegater as it's going to be as laggy before surging...

My turbo spools up quicker than a T2 and goes better than a T25... So it's the best of both worlds, in all honesty, if you want reliability and cheapness, you cannot go far wrong with the 2052V, I keep picking them up for £60 or so... So little lag, so much torque and a pretty darned good top end... 2256s are a good option, but very, very expensive as all the BMWs keep destroying them...

Very good! With regards to surging, it's just a case of progressively increasing 'throttle' with revs then? I appear to do that already to some extent to stop the motor bogging down so i guess i have some 'mechanical sympathy' ey?!

Just to clarify, do you have any particular links to hand showing the actuator modification? I still need to properly familiarise myself with vnt operation, but i understand the vanes are normally vacuum controlled. Is the switching to boost control detrimental to fine vane contol then? Hence the surging at low revs? In effect, causing the accelerator position to fine tune the vane position?

How durable are the gt2056v's? What sort of boost pressure/ estimated power can they sustain and support reliably?
Thanks