I have 81 240d 4spd with 617 out of 83 300sd...triple k turbo, 240d flywheel,
3" exhaust from turbo housing back, with muffler mounted in resonators location, boost gauge installed via alda line, pyro installed about 1.5" from exhaust outlet. Chain shows no stretch and pump timing in dead on, crisp throttle repsonse and quick spool up! The question is when under boost gauge shows 15psi+ I have seen 20psi at times. Pyro shows 800f with engine temp at 1/4 inch below 80...You can hear the boost in pressurize the intake and there is ZERO blowby... Oil level is dead on everytime and MPG is excellent...How long till turbo explodes as such high psi, but low pyro temps... I have also ran propane via ricer tube, with neat results and 950-1000f with ZERO blowby...How much can 617 handle? thank you