T28 Replacement

[ramzb]

Need some help please guys. I'm replacing the T25 turbo for a T28 but not sure where the pipe between the turbo and the actuator goes. On the T25 it connects from the front of the turbo but on the T28 there is nothing to actually connect to, or am I missing something?

Old T25

New T28

[indecisive]

you just need to tap that into any charged vacuum line.

Most people will put a valve on the silicone coupler they use and attatch a vacuum line to that.

it must be charged, and the closer to the turbo it is, the better since this is the signal for your wastegate.

[ramzb]

Cheers for that, I've got a ca18det and have the BOV plumbed into the valve on the side of the block. If I put a tee on this will that work?

[indecisive]

um...yea, but from what I understand, you want a strong boost signal. by the time it's reached the engine, the pressure drop has gone down at least 2psi...

[Jeff]

If you can't find anywhere else then there is a spare nipple just behind the throttle body you can use

[ramzb]

Thanks for the help guys. Has anyone done this conversion coz it aint as straight forward as I thought it would be The oil and water feeds are in different positions. Think I'll go back to driving my AX it's less complicated

[PukkaSilvia]

On most turbos you need to undo the housings slightly so you can rotate the centre section to positions that work for your fittings. Its not nessessary to use the water lines although if you can get them to fit its better.There there to help reduce heat transfer from the exhaust housing to the compressor housing and increase durability but many poeple dont the water lines at all(including myself) and its works fine.


When did you go det?

[Jeff]

This may help

http://www.sxoc.com/vbb/showthread.p...ht=t28+fitting

[ramzb]

Thanks for that the instructions are brilliant, should be able to do it with my eyes shut now. The det is still in my S13 haven't decided whether to stick it in the S12 or not.