I've got a '98 T800 with a 1LW 3406E rebuilt and retuned to 550, it was 475 from the factory, oil cooler let go at 678000 miles, ended up...
I went from a max of 26 all the way up to 33 psi, pulls better than it did before, in the stop and go driving of hauling silage I try not to think...
there is a little rubber hose approx. 3/8" OD at the turbo, take off one end of the line and shove a round object into it and hose clamp the crap...
