Actuator pipes!!! Help
Turbo Mini Forums

I'm finally getting to the bottom of my engine failure on the Dyno..

Could someone please confirm.. The actuator pipe.. Goes from the actuator into the brass Union thingy.. The a pipe comes out the other side.. Where does this go?? I just had it to the atmosphere.. (Not sure if right or wrong!! )

I recently rolling roaded, and ended up with a poorly mini, done piston rings on number 2! The rolling road chap blocked up the pipe with a bolt.. Both Coltec racing (whom built my engine) and cr turbos think doing this has over boosted the turbo.. Resulting in my rings going..

Please help as if this is correct then I shall be asking for my money back Togo towards the rebuild!!

Edited by Rich123 on 1st Oct, 2015.

I've got the open end going to my bleed valve. if you had it open to atmosphere you will have effectively been getting as much boost as the turbo could muster so a strong likely cause of your failure

what kind of actuator, if it was the type with two pipes one either side of the piaphragm then the one closest to the wastegate rod should be left vented. (i.e. R5GTT type)
If it was the type with 2 ports on one side of the diaphragm (3SGTE type) then the pipe should indeed be blocked.

turbo 16v k-series 11.9@118.9 :)

Denis O'Brien.

turbo 16v k-series 11.9@118.9 :)

Denis O'Brien.

It's got a uprate avo bar actuator.. It's the type with one either side of it?

P.s thanks for the help evolution!

Ah slight bit of confusion.. I will get a photo up when home :)

Simple test as follows. Connect a tyre foot pump to the actuator stub pipe that was piped to the turbo. Leave the spare stub open. Pump the foot pump. If the actuator rod moves, your RR guy was wrong to block the pipe. If it doesn't move and the air comes out of the spare stub, he was right to block the pipe.

I missed that from the first post

I read this as two pipes from the brass Union on the turbo not the actuator.

The rolling road guy blocked this which will prevent the turbo from over boosting.

In the 13's at last!.. Just

That is exactly what I thought Gary

Ok so on a normal setup... It should be left vented to atmosphere?

NO, as stated earlier, if left open it will allow the turbo to run amok.

It was originally connected to the boost solenoid, so it should be blocked or connected to a bleed valve/boost controller.

This thread has some handy drawings.

http://www.turbominis.co.uk/forums/index.php?p=vt&tid=257121

http://www.twin-turbo.co.uk
http://www.hillclimbandsprint.co.uk/default.asp

A man without a project is like a like a woman without a shopping list.

Rich 123 the best way to explain how uve piped the actuator up is do us a drawing

In the 13's at last!.. Just

Ok guys thanks, I got it. Was just trying to figure out what to do then with the open nipple.

I'm understanding now... 👍