06-03-2012, 04:48 PM
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...
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...
