i don’t think so. but why do you say that?
a car with this turbo on buschurs dyno just did 553AWHP… that car is good for 138-140mph… he just went 136 before he ported the turbine housing.
here is another dyno from Robert at FP… this is a 2.3 on race gas.
made 640WTQ ( tq is so high due to the stroker) and 635WHP… its good for about 50-60whp over the FP RED.
i WILL be doing this turbo when i am ready