For the t25 turbo can you use a external wastegate on them?if so i need some instruction on how to do it.thankx

 

Sure you can use an external, but first you need to eliminate the internal. Here is how:

1. Remove the wastegate actuator from the turbo.
2. Lay the turbo so the wastegate flapper is closed and the exhaust flange is up.
3. MIG weld a bead around the flapper, sealing it completely.
4. Have a beer.

It can be done safer if you remove the exhaust housing from the turbo. You can also do TIG welding but it would require more talent to TIG in that small space.

You do have an exhaist manifold that is external wastegate compatible, right?

Randy

 

Yes RGAZ is correct. If if you have the $$$ then buy a turbo that you don't have to do that, like rgaz said is your exhaust manifold set up for external waste gate if not then I would just use the turbo the way it is the waste gate on the t25 is just fine I say..


B20T Vtec 360hp@10psi (on pump gas half tune)

 

The internal gate is fine until you reach some real boost levels, lots of DSM guys upgrade to external gates, some weld right on their cast manifolds, some using custom 02 Housings and remove the internal wastegate flapper..



Personally I think this setup is wack, but It works.. The wastegate should be on the manifold.

Jeff