Allright before we begin, I have 2.35 L built ej22t block with built sti heads kelford 272 cams. Manifold is fobia twinscroll foglight mount t4 divided flange. Purpose of the car is road course fast spool 500-600 whp (mostly 500) 600 just in case. Ill be using 1.06 a/r t4 divided housing on both turbos.
Previous setup tigwerks twinscroll rotated gtx3582, full spool around 4500 in 4th gear with .84 t4 divided housing.
I have read a lot a out both turbos, more on the hta because its been out longer. Hta3582 is gt35 turbo cartridge with a true 82 mil instead of the 86 mil wheel of the gt35 turbo. Spool 200-300 rpm sooner the gt35 turbo makes same power.
Gtx3576 uses the gtx3076 comp wheel with gt35 rear wheel, on paper it looks fantastic, same spool as the gtx3075 but will make same power as the gt35 turbo. Not enough info because its a newer style turbo.
Just wanted to see what everybody thoughts are on subject.