Mac, I agree. I costed out a Blouch 16g with an adapter and downpipe, it’s about $2k. What I did was I looked at the GTX2860 and looked at their turbine flow for different A/R. I then looked at a slightly smaller GT2560 and did the same. You can see how a bigger wheel in a smaller A/R at some point doesn’t work. The new Mamba already have the high flow turbine, I believe this is the turbo 2J ran to make their 315 whp run. If you have the Mamba already, why not rebuild it with the higher flow TD04L turbine, it’s a direct drop in upgrade for about $150.My goal is to hit 300+ whp and try to keep it as stock as possible. The turbo Bay might be the way to go. How much different is the 20T compared to the Wheel TB is using ?
Either way its a serious amount of $$$ to do more power.
When I looked at the 52mm wheel from turbobay I noticed how large the hub diameter was and how restrictive looking the wheel profile was. The new mamba high flow TD04L wheel has a small diameter hub which makes the turbine blade look and act like a bigger wheel, plus a taller blade height to extract more energy, with a blade profile that already looks clipped, plus 9 vs 11/12 blades. I don’t think that 52mm turbine is going to significantly outflow it by much if not at all. I wouldn’t drop another $1000 on a turbo that is barely higher flowing then the current newer Mamba.