Here is the differences between the 16T and a GT28. The Mitsu turbo will have 1 of 2 housings on it either a 6 cm2 or 7 cm2. MCX now supplies their kits with the 7 cm angle housing but some of the older kits out there might have a 6cm housing, not sure. Here's where the problem lies, the 7 cm housing which is the larger of the 2 has an effective A/R of .49 when converted to Garrett terms (Mitsu uses a different system for measurement) where the Garrett GT28 is available with either a .64 or .86 A/R. MCX gets away with the smaller A/R because all of their basic kits are all rear mounts and the pressure loss (read here exhaust cooling, temp and pressure are inversely proportional)through the cooling in the exhaust system keeps the heat in check. In a front or mid mount system the 16T or 19T (they use the same exhaust housing and CHRA) will back up way too much heat and the pressure difference between the charge side and the exhaust side will be huge. All that back pressure ends up in cracked headers. Most front mount kits started with the GT2554 years ago but everyone went away from that turbo because as boost went past 10lbs the 2 things happened, first the compressor started to get nearer and nearer the choke line and second the heat built up on the exhaust side. Its just my opinion here so take it as you will but I would'nt use a 16T or a 19T on a midmount for the reasons I just stated. When I built my midmount Rx1 I used a 2860RS with the .64 housing and mostly ran it around 15 or 16 lbs, if I were to do it all over again I would use a 2871 with an .86 housing this time and run the same boost. Don't worry about lag as it is non existant with the midmount, if you build this thing right it'll tear your arms off.
M5
M5
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