The T3 series will build more than enough boost if you only want 300 ish HP.
There are other turbine A/Rs available, the one you list from VS comes with either a .48 or a .63.
Which are you basing your spoolup figures on?
I have a divided T3 housing that I have plans to run a diverter valve in to block half the housing at low speed. With the radius, w/ half the area equals half the AR, so 1.08 becomes 0.54. That assumes an exectly equal division, but should be very close.
I don't have a P/N or the aplication it came from (Flebay purcahse, I was building my own hybrid).
The T04 compressor will definitely do more than I'll ever really need. Again, my concern is the T3 exhaust housing being too small and restrictive. I was going to go with the .63 a/r 60 trim T3/T4 I linked to.
I based my spool up figures on two things: experience and plotting everything out on the compressor map. I found the engine flow rates for certain boost levels at certain engine rpms and I plotted it out. It should make 15 psi quickly and easily and be at its max efficiency level the whole time. As for my experience, I used a T3/T4 on a 2.0L VW engine with great results. IMO the combination was perfect for a 2.0L which concerns me because I want to use almost the same turbo on a motor that's 50% larger.
Nate
