Turbo oil pressure

[Lloyd]

Hey, can anyone tell me what sort of pressure I should aim for with a T3 on a 4AGE? Its on there now and runs sweet but smokes a little after a bit of a thrashing and the only thing I can think of is excess oil pressure. There is no restrictor in the line to the turbo which is fed directly from the oil pressure sender hole. So yeah, what pressure should I be getting with the foot down a bit at say 4000rpm?

[Stu-]

Weld the steel fitting up and redrill with a 1.5mm drill.

[Lloyd]

Which would give me what pressure roughly?

[mr30%]

using a 1.5mm hole does not alter the pressure it alters the flow make sure that the outlet is 15mm or bigger also excess crank case pressure will stop oil draining to the sump. The outlet should be above the oil level in the sump.

[vvega]

it alters the availbile pressure at a giving flow rate sorry
1.5mm id fine for non bb turbos
gt bb turbos requre a .7mm restrictor

v