Most of the people were using the factory Hyundai 2.4l and Mitsu G4CS cranks because (at the time) there were no other alternatives on the market plain and simple. Only fairly recently have nice aftermarket cranks started to pop up here and there! There are quite a few successful OEM 100mm cranks doing just fine out there, but comparatively speaking they're definitely more prone to crack I highly doubt 2JZ cranks were designed to handle 1000whp, or stock 4G63 cranks to 6-700whp respectively. It's tough to justify a $1600+ crank though on an old $3400.00 car

It's interesting to note that the 2G 7-bolt 2.4l cranks and 2.3l (7-bolt strokers) seem to not really have this problem at all though, some speculate that it's because of the factory girdle and revised block design etc. Those that choose to run the 6-bolt 2.4l cranks and also run something like Kiggly's girdle seem to have way, way better luck. Alright, back to my cave!

Tell him to save his money and time on experimenting. Bottom line; the Evo IX turbo is just a big 16g. Big 16g's have been bolted on to DSM's for years and have made the same 350 hp with the stock DSM manifold. And there's already a gang of bigger bolt on turbos for big power too; 18g, 20g, Green, Bastard, Frankensteins...