Yeah that is way too large for anything above stock boost. For 20psi you want to be running around .032 to 0.024, you want to start with the larger size gap and work your way down if you get blow out which is what your most likely getting now with that high boost.

The larger gap the more spark you will get, as you increas boost that also increases resistance. So a smaller gap is needed to keep the over all resistance the same other wise you end up with spark blow out which basically means the spark does not happen because the resistance is too high.

 

Oops, I am sorry! You are correct, they should be 1.0-1.1 mm, stock spec with stock boost anyways. I was looking at 2.8L and not 1.8L by mistake. I second what Mike-2ptzero said.

 

Update - I gapped the plugs to .032 and got the new turbo in. I installed a MBC in conjunction with the N75 as the pic shows: http://pictureposter.audiworld.com/8...c_parallel.jpg

Car is running. Still smoking (from what I assume is the oil left behind from the blown turbo bearing). And I can still push way more boost than I want. The controller is completely closed off, so I am assuming my N75 is bad?

Does anyone have any ideas, or know what N75 I should get? The aftermarket ones seem to be the same price as OEM (from what I've seen).

Does anyone know how much boost I can/should be running on a K04?

 

If you installed a MBC like in that link then there is an issue with the WG, because at that point the MBC should be allowing you to decrease the amount of boost by allowing pressure to the WG sooner then the N75 is doing. That is the point of doing a MBC in paralell. It does not allow you to up the boost more then the N75 will allow.


MBC completely closed off? I hope you mean that you have it set so it is fully open allowing all of the pressure thru it to the WG.
You open the MBC(more flow) to decrease boost and close it(less flow) to increase boost.

 

So my wastegate is bad? I JUST put the turbo in, and it has the external WG. What do you suggest I do?

Thanks for all the help by the way Mike.

I have the MBC turned so that it is at the least amount of boost possible...all the way counter clockwise. If I turn it clockwise, it has the "boost +" arrow.

 

I think you mean Internal WG since it is a K04. External WG is the type that is not part of the turbo and is usually mounted to the manifold.


You can test to see if the WG is bad, just bypass the mbc/n75 by connecting the 2 vac lines together(turbo to WG). With it setup like that it should only push low boost levels.

 

Maybe I'm talking about the actuator?
Tonight I'll hook it up like you said and see if it just pushes low boost. If so, then everything is good? How do I know if my N75 is bad? I just really don't want to blow this turbo b/c funds are getting short fast.

 

Update - Bought a K04 from Mike at Ringer-Racing - saved my ***!! Thanks!! Turbo is fine, car is running smooth, and finally getting the power I was expecting.

 

So much power that your stock clutch now slips


Glad I could help.