Originally Posted by kakarot09
My prediction is 35r performance. 35r boost threshold and 35r power. The compressor maps look similar basically the same although the gtx30r wheel has to spin faster to produce the same results because it's smaller. So it may be that it actually lags slightly more on the 35r turbine than a 35r compressor would. Personally I'm going to run an HTA 3582 because they seem to have lower boost threshold than a normal 35r and make the same power.
That sounds like a logical conclusion; however the same could be said about the gtx3071. I have both the 63 and 82 housings and can tell you the response is better than the standard 3076. I have a friend with an 82 a/r 3076 and we routinely drive one another's cars and he comments all the time. I don't know if its worth the extra money however as we are within 200 rpm spool of one another at full throttle. The results are repeatable though.. Nothing mind blowing. My car feels livelier to 5 psi though as in pulling away from a stop. It's hard to quantify.
there's an evom comparo that shows the 3576 to spool faster than the gtx3076 which doesn't quite make sense since the 3076 has the smaller turbine wheel. I would love to see an actual Subaru comparison. I think the performance gain would be greater on our cars though as we typically benefit from the larger turbines.
Just a few thoughts. I feel the 71mm wheel is a better match for 60mm turbine for our cars than the new 76mm wheel is. I wonder if the 3576 is the same.