porting ct9 wastegate

[dangerousdai75]

Going to attempt to port wastgate on my turbo this week as my boost creep is really annoying me. How much roughly do i need to grind off. What should the overall diameter of the wastegate hole be?

 

[Foggy]

Like you i was shitting it doing mine. take your time as long as the whole is not bigger than the waste gate flap its ok. simple job best of luck.

 

[dangerousdai75]

Did it make alot of difference? also what grinding tool did you use?

 

[Foggy]

cured the problem mate used a drill with a grinding stone from halfords

 

[MARK@CMBAUTOS]

hears the how 2 guide http://www.toyotagtturbo.com/forums/showthread.php?t=40945

 

[danb87]

what is the benfits/gains of porting the wastegate???

 

[shorestyle]

what is the benfits/gains of porting the wastegate???

Eliminate boost creep.

Read more here: http://www.toyotagtturbo.com/forums/showthread.php?t=53375

 

[Dub-Se7en]

mine was took out to 24mm if i remember right, but as said, leave the hole a few mm smaller than the flap so it'll seal correctly

 

[biscuit]

Really need to do this, but might aswell build a collection of better bits to bolt back onto the turbo after...

 

[shorestyle]

A method I used to make sure you take off the right amount was to close the wastegate flap and spray a little spray paint so it makes an outline of where the wastegate flap meets the wastegate. Worked like a charm. Better safe than sorry.

A perfect time to port your wastegate would be when installing an aftermarket manifold.

 

[jam35]

A method I used to make sure you take off the right amount was to close the wastegate flap and spray a little spray paint so it makes an outline of where the wastegate flap meets the wastegate. Worked like a charm. Better safe than sorry.

A perfect time to port your wastegate would be when installing an aftermarket manifold.

good idea that use carbide burrs aswell will take no time to get it how you want it than clean up with a suitable polishing stone

 

[Sigma]

No one else use a vac line whilst they're grinding to keep the swarfe out of the blower?

 

[danb87]

im attemting this tomorrow, roughly how much need too be brinded out? in mms please?

 

[jackjohno]

Porting waste gate

A method I used to make sure you take off the right amount was to close the wastegate flap and spray a little spray paint so it makes an outline of where the wastegate flap meets the wastegate. Worked like a charm. Better safe than sorry.

A perfect time to port your wastegate would be when installing an aftermarket manifold.

Im about to port my wastegate ive sprayed some paint on so i no where to grind but were the flap meets the waste gate it isnt in the same all the way round (off centre) if you get me! Does the hole have to be a perfect circle??

 

[mark1991]

i took apart the ct9, removed the wastegate flap/penny and drilled it out at work to 26mm. i tig welded the penny using low amps to build up the outside diameter of the penny, and then using sandpaper on top of a flat surface to flatten the weld on the penny and polish out any imperfections left on the penny this gives a flat surface and a nice sealing face. i will make a how to guide very soon.