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DIY Turbo Discussion greddy on a 1.8? homebrew kit?

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Old 05-17-2011, 10:05 PM   #21
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Default Update!

Turbo is still doing well! Zero smoke, and making boost.


Installed one of the NXS manual boost controllers recently. This was long overdue.

I went from wastegate (6 or 7psi max) to a nice flat 10psi. INCREDIBLE!!
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Old 05-17-2011, 10:06 PM   #22
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Quote:
Originally Posted by 94mx5red View Post
Turbo is still doing well! Zero smoke, and making boost.


Installed one of the NXS manual boost controllers recently. This was long overdue.

I went from wastegate (6 or 7psi max) to a nice flat 10psi. INCREDIBLE!!
Woot! Turn it up to 15.
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Old 05-22-2011, 03:24 PM   #23
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Glad you got it sorted out!

To touch on what Stephanie posted before about the seals sometimes not working temporarily, she is absolutely right, and the reason is the seals behave much like a labrynth seal. Oil can get past a perfectly good seal in a turbo if the pressure balance on either side of the seal drives it to. This is why the oil feed and oil drains (and PCV) are so critical, and everyone that makes a kit, or a turbo has very specific recommendations on how to do it to avoid issues. For the OP, I'm guessing that something changed in your drain line when you changed your motor mounts, and it couldn't quite keep up with the oil volume any more. It would also explain why the smaller feed restrictor would work to fix it.

I've seen a lot of turbos that leaked oil and were blamed on bad oil seals, and the seals were just fine. The piston ring type seals generally tend to go bad due to overheating which makes them lose thier spring and makes them collapse down onto the shaft.
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Old 05-23-2011, 10:08 AM   #24
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I went through hell and back with a turbo setup just for not having a oil restrictor.

Installed the restrictor and the turbo never gave me any more problems. I had this "friend" just waiting for me to throw the towel because he as well did not know what was the problem. Once I told him the restrictor was installed and car ran fine, he seemed pissed as if he missed on a good deal.

I do not understand many times here on the forums this big debate for to be or not to be of the restrictor. I prefer the safer route than trying to push my luck.

Last edited by mazpr; 05-23-2011 at 10:11 AM. Reason: JDMPOWELOL
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Old 05-27-2011, 04:06 PM   #25
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Did the smoke from the exhaust happen to be blue?
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Old 05-27-2011, 05:26 PM   #26
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Did the smoke from the exhaust happen to be blue?
I remember it being a light gray.
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Old 05-27-2011, 10:53 PM   #27
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I was hoping my situation was similar. Such is not the case haha.
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Old 05-29-2011, 12:19 PM   #28
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Quote:
Originally Posted by Rara View Post
Glad you got it sorted out!

To touch on what Stephanie posted before about the seals sometimes not working temporarily, she is absolutely right, and the reason is the seals behave much like a labrynth seal. Oil can get past a perfectly good seal in a turbo if the pressure balance on either side of the seal drives it to.
That would be a dynamic seal turbo that has that issue

There are turbos with carbon seals that won't have that problem. That why if you run something like a TB infront of the turbo you need a carbon seal turbo
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Old 05-29-2011, 12:57 PM   #29
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Quote:
Originally Posted by mazpr View Post
I went through hell and back with a turbo setup just for not having a oil restrictor.
I sold the turbo crap from one of my VW's because I could not figure out the oil restricter thingy.
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