joshinthecity
19-07-2007, 11:43 PM
I think I have a reasonable grasp on turbo tech, but I have a question for those who have done bigger-bore systems on modern TDs.
1: On a vehicle designed to deliver it's best at low engine speed (ML 3.2 is pulling from 1500rpm) wouldn't a degree of back pressure be very important? I can see you may get some benefit at high rpm due to pure lack of restriction, but not sure how a 3 inch mandrel bend system with free flowing muffler would be an improvement at the bottom/middle.
2: Wouldn't a dump pipe direct from the turbo make this situation worse, not better?
3: What about de-restricting the middle of the pipe work by just removing a muffler. Given that the turbo muffles most of the noise anyway?
j.
1: On a vehicle designed to deliver it's best at low engine speed (ML 3.2 is pulling from 1500rpm) wouldn't a degree of back pressure be very important? I can see you may get some benefit at high rpm due to pure lack of restriction, but not sure how a 3 inch mandrel bend system with free flowing muffler would be an improvement at the bottom/middle.
2: Wouldn't a dump pipe direct from the turbo make this situation worse, not better?
3: What about de-restricting the middle of the pipe work by just removing a muffler. Given that the turbo muffles most of the noise anyway?
j.