Thread: VNT turbo is fitted photos

you can see the EGT probe fitted, I drilled and tapped the hole on the turbo inlet flange myself. MM did drill and tap a port for me on the aft side of the flange, but it did not suit my existing EGT probe.

I see nice spot for it should of looked at the pics

The Mad man VNT has clocked up 2000 kms since fitting, and I'm still happy. EGTS are lower, probably by 50 degrees. Even on long hauls up hill I don't reach 600 deg. Much more torque for pulling up the hills in 5th or 4th. Can keep up with the traffic on the freeway up hill and down dale at 110 km/hr . Drove on the beach to Rainbow beach and on the tracks ( recently graded, in good condition, and easy going). But the increased torque makes sand driving easier, and easier to cope with hills etc on the tracks. I haven't had time to any further fuel pump mods, than those done for my APT inter-cooler. I think to reach the full potential, I need to to more fuel pump adjustments. I bought a second hand exhaust down pipe from BOR, since mine has a big dent in it, I'm in the process of wrapping it with fiberglass tape, up to the first join. Plus have the central muffler replacement pipe on order.

Stop it I'm geting jealous

I picked up this good second hand down pipe from BOR, and insulated it before fitting. I jacked the car up on the chassis as high as i could on the LHS, and pulled the pipe out forward. I was able to get the new pipe in without damaging the new insulation OK. It has fiberglass cloth and aluminium foil tape, plus SS cable ties. My old pipe was still in good condition except for a fairly deep crease, I vaguely member running over a log once.

Soooo, how is the vnt controlled?.

The actuator is a diaphragm type is under slung under the turbo. It senses the pressure at the inlet manifold. seems to work OK. I probably should track down a spare.

Vern, it is pressure actuated. Looks like the waste-gate on the 300tdi turbo, but it is actually the actuator.

Simmo, keep an eye on the pressure actuator rod end, where the pin from the VNT lever passes through it. These are known to flog out.

The turbo can soot up and make the vanes sticky which then loads up that rod end.

What is the opinion of installing a egt probe same position as Simmo's (exhaust manifold flange) but in a cast manifold?

My 2.8tgv manifold doesn't have a nice spot like the Tdi and its all cast.