Oh the turbo is not stock but I have no idea the make of it because there is no manufacture label on the turbo anywhere. But on the inlet wheel it has the larger fins plus shorter fins inbetween if someone knows who makes it that way id like to know. Ive seen a couple pictures of the blouch with those type of fins. It has a mbc and gets to the set psi easy in 3000rpm range and is steady all the way to 7000.
The cracked header is minor i think because it was welded but the little bit hidden in the collector could not be reached.
I wanted mostly street use so wanted the lower psi. Before all the fixing it was set high and easily hitting 26psi.
As for the launching i dont know the best way. And really did not launch. that time was at maybe 3000rpm or just under with a little slip taking off.
the only built part of the engine is the pistons the rest is stock parts. dont know high to aim for in turbo pressure.