Greddy Twin-Turbo In Development

Mitsuyager9

20g's are quiet a bit larger than gt28's..coming from mitsu i would say that a 16g evoIII would be a good twin setup for 12 psi..they have good flow volume but can run almost 30 psi...a 20g i would think would be to big for a low boost tt setup...FP sells a turbo with a 16g housing and 20g internals, quick spool and monster top end

Scribe

Well, if you want to go that route, even the EvoIII 16g is going to be too large, but yeah that's exactly what I'm saying.

As for SixBone, GReddy is probably assuming that the person putting this kit on has dropped their compression ratio and will be running in these turbo's efficiency range.

For a street setup, the sweet spot would likely be somewhere in the T28 (not GT28) to 16g range in mitsu-speak. The spool would be instant and would hold to redline. I'm looking for a good compressor map. Anyone?

Mitsuyager9

yea i know even the evo 3 would be a little big but it gives you some room for lower compression if you wanted to do a rebuild someday...the small 16 or t28 would be a better option if you plan on keeping stock compression ratio for as long as you own the car...a 14b would be the closest if you wanted to run 12 psi...i know there are plenty of graphs but i dont feel like hunting right now