Post by
evildky »
https://forums.nicoclub.com/evildky-u13100.html
Fri Apr 29, 2016 6:52 am
Technically he is correct on the bottom end of that, not many 1000 hp VG30DETT's out there period. Ant pretty most top out in the mid 500's with stock internals. The internals of the n/a are the same as the TT except the volume of the pistons. I've heard the oil squirters are at a different angle but many turbo engines don't have piston squirters at all. I have heard of single cam VG30E N/A Turbo conversions making well north of 400 whp on stock internals, the DE's had better pistons and better flowing heads and manifolds so it should be capable of making about as much hp and the TT version, give or take.
There are two types of failure, the first is the much more common lean failure. As he suggested things go lean, things go boom, tune is most of it, but eventually you get into flow characteristics causing one cylinder to get more air than the others and problems occur. Generally when big power builds go boom it's because someone put in too much advance or they tuned too lean. Of course when you walk on the edge an injector sticking a little can cause catastrophic failure.
The second type of failure is mechanical. Sometimes you cram so much air into a cylinder the amount of resistance is too much and suddenly the parts are the weak link. The VG's actually have fairly small rods but they are still stronger than the hypereutectic pistons they are attached to. When lean conditions go boom it generally blows a hole in the fragile pistons but even with the best tune at some point you reach the limit of these frail pistons.
Cost, that kit does not include injectors or tuning, your stock injectors are good for about 300 whp (actually less). For the cost of that kit you could buy a front cut from a turbo car and do a propper TT conversion, at this point you can find running driving TT cars for the cost fo that kit so if you want power that's not the cheapest way to get it.