How to hookup a turbo

[nis.k.a.]

Wastegates always run off the exhaust turbine. External wastegates are obviously mounted externally off the turbine housing. Somewhere on an exhaust collector. Internal wastegates are the flap doors you see inside turbo next to the turbine. The internal wastegate opens via an actuator.




Here's a turbo with an internal wastegate. The circular valve to the left of the intake compressor in the first picture is the actuator. The actuator is connected to the circular flap (the internal wastegate) next to the turbine the second picture.




Here's an example of an external wastegate. Notice that the turbine housing doesn't have the flap. That's because the external wastegate controls boost.

[nis.k.a.]

Jaymes. After reading your post over again. Maybe you're confusing a wastegate with a blow-off valve. In which case, you are correct. The blow-off valve is mounted somewhere between the intake compressor outlet and the throttle body/intake manifold. Two totally different functions.

[SPEEDERZ]

here1s how i do the turbo...it's correct...i think...



flw! see ya!

[Nobbys Nuts]

The engine in the pic is for an Integra though isn't it? I am sure that is how I read the original post.

Originally Posted by mighty_real

That re-labeled pic is much better!

You now see that you've pretty much mounted the turbo back to front as the air intake is more likely to come from the front (I'm assumimg your engine is meant for a front engine/rear wheel drive car).

Also, you could add a tubular exhaust flange (smaller in diameter than your turbo center section), a few (scale) inches long, to the exhaust snail. This is where the engine pipe would hook up (not always a gasket at this point because of extreme heat and a three-bolt flange is OK).

If you do that, you might as well tighten up the turbo center section a bit. All that it houses is a very small center shaft bearing (turning about 10x engine speed) and passages for oil and maybe water (coolant).

John

[tardster]

Wow I am totally confused now, with all the pics and stuff....

[Jaymes]

thanks for the info guys. mrceej I was actually talking about the wastegate. Its function is to let out excess air while boosting right? And the blow off valve is to let off air when you let go of the pedal and don't need boost.

[willimo]

It's all so clear, now!

[Jurva]

How about this picture then. Does it make things any clearer to the rest.

[LS1Aaron]

Most street cars with an external wastegate are not going to have a cat,and it would dump down by the fender.