Originally Posted by Lunchbox
Look into AndyMac's DIY Turbo build. He used smaller T3 turbos initially and mentioned that the backpressure was pretty close to the high end of the limit. I dont remember the turbine housing size tbh, but i want to say they were rather small or middle of the road T3 hotsides. (.68/80-ish)
Honestly whats keeping you from using T4 Hot-sides? They fit in the foot wells just fine, its really the compressor covers you need to worry about being too big for fitment if thats your worry. Ive purchased a pair of 67MM Turbos with .81 A/R t4 hotsides with single entry and 3" vband exit and they seem to fit in the foot well area fairly nice from mockup perspective.
I want to utilize symmetrical units. Very limited options. There is gtx3582r which IMO is no go. Some are not even out yet but PT will have 6266, 6466, and 7672 next year.
Im debating t3 6466 1.05 a/r and t4 7672 (I believe 0.86 and 0.96 will be available.
6466 t3 1.05 a/r should be a blast but no idea how much that 1.05 vs 0.86 helps to reduce packpressure
7672 is a monster of a turbo and even if I manage to fit them in footwells they are most definately an overkill for a street car. Thats over 2k capable turbo in twin configuration...
Call me on wanting symmetrical setup but thats how I do things sometimes