I'm no expert, but I can tell you a few things I've learned from my 745i.
Most choose to mount the turbo sucking through the AFM. Modding an M50 manifold seems very popular for our M42s. The AFM only measures air volume, so it's a pretty good solution to a turbo. Porsche didn't have any troubles with it - study the 930 diagrams to get an idea of how they did it.
You'll need bigger injectors than those 19# Mustang units.
To minimize boost problems with the stock AFM, make sure you don't dump excess pressure to atmo from your wastegate. Any air that the AFM has measured needs to stay in the intake. Recirculate pressure from the WG back to the intake between the AFM and TB. Use a BOV to manage pressure spikes instead. If you figure out a good way to keep the AFM from abruptly slamming shut, LMK. I've never had the guts to play with it much.
Be sure you have some one-way valves properly installed on your car. You don't want the intake pressurizing your brake booster!
You'll need a WBO2. Even at 6psi, you can easily punch a hole in a piston. The Innovate unit was only $200 last time I checked, and it'll feed a stock narrowband signal back to the DME. I prefer an analog dial, but it looks cool in digital too. Once it's dialed in, go back to the narrowband.
Start with a low-pressure WG spring, and use a manual "dial-a-boost" bleed valve for your tweaking. Consider a magnetic boost control valve too - they can work really well. Feed it pressure from the intake just before the TB, and use signal from that on the WG upper chamber.
The RRFPR doesn't mount on the rail at all. Just splice it into the return line after the stock FPR. I clipped my Begi to the intake manifold.
Best to ask first...an idiot would do it wrong, then ask questions.
Topic: low budget low boost turbo e36 m42 (Read 5854 times)