...BTW your Bieber avatar is awesome.-Malone
Here's my plot on the compressor map. I'm sure it's slightly off because I had to guess a little for my boost (and P/R by extension) at the lower end of the map, so that is probably wrong, but I think most of it is correct. The parameters I'm going by are these:Max Boost - 30 yes but 30 psi would be nearly 3bar on the mapAtmospheric Pressure - 11.47 PSI or 23.35 in Hg i think you just mis typed this? should be 14.7psiVE - 90% (this may be off; however, this seems like a feasible number with a ported head and exhaust manifold)I usually use 85 when considering a ported head, but that is very optimisticCompressor Efficiency - 76% (in this case)BSFC - 0.409 @ 20:1 AFR; 0.372 @ 22:1 AFR (again, I'm making an assumption based on what I've read)i usually use a bsfc of .36-.38 and afr of 18:1 but they are all guesses, i just base all my numbers off of comparing dynos to the engine specs of the car.[/list]The main differences between the MHI turbos are wheel sizes and housing sizes. The TD04s have 6 cm^2 turbine housings or 0.41 A/R and the letters after the frame size (04, 05, 06, etc.) correspond to the turbine wheel. I'm assuming my turbo has the TD04L 76 trim (41 mm/47 mm) or TD04H 73 trim (44 mm/52 mm) turbine. The number after the frame size (15G, 16T, 18T, etc.) designates the compressor wheel size and the letter is the wheel style. For the 18T, the measurements are 45 mm/56 mm and the T means the blades are all the same height. A G-style wheel has half of the blades shorter than the rest.I'm sure some of you are better at this than me, so if I made any mistakes, feel free to correct me. I used Garrett's equations for a lot of this and tinkered with some turbo calculators I felt were decent for a diesel.
I used a P/R of 2.7 and an atmospheric pressure of 11.47 because the elevation is 6800 feet where I live. I'll re-run my data, but I don't like the squirrel performance calculator. Most calculators are catered toward gas engines that run around 10-12:1 within P/Rs.