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Post by azmidget91 on Jan 4, 2013 17:23:27 GMT -5
When I got my engine it had what appears to be a stinger wastegate, I am not 100% since I never was told from the previous owner. The engine does have a stinger header so I would assume it is a stinger wastegate.
Anyways, the previous owner said that it might be bad and stuck on him a few times. Do you think tearing it apart and cleaning it will help or should I replace it?
I can't drive the car around yet since it has no driveshaft, brakes, floor.....and several other things, but I have started the engine a few times. I never really got into the boost since there was no load so who knows if it is working or not.
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Post by Stinger on Jan 5, 2013 1:24:01 GMT -5
Hard to say if it is one of ours or not. Taking it apart and cleaning off the shaft certainly wouldn't hurt anything.
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Post by azmidget91 on Jan 5, 2013 9:53:55 GMT -5
I will try that, this is my first turbo project so I am always a bit cautious at first
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Post by azmidget91 on Jan 7, 2013 8:30:56 GMT -5
So I pulled it apart and everything seems to be fine inside, just going to clean it up and put it back on with some better bolts. From the look of the design, with the valve seat being a separate piece, I don't think the small bolts and nuts the guy used when he put it together are good enough.
Also, it is dumped to the atmosphere, but doesn't even have a pipe, just open. Now me not having experience with turbos but plenty with engines tells me that it should have a pipe on it. On an engine I know that if you run no header or exhaust manifold you can warp valve, from them cooling to fast, I would assume the same could happen on a wastegate, correct?
One more thing, the spring was green, if this is a stinger wastegate (which I am 99% sure) what psi is that, the 12 or 18?
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Post by Stinger on Jan 7, 2013 14:29:08 GMT -5
We've had a few different wastegate designs over the years and their psi with a given spring varies. The easiest way to tell is to feed it regulated air pressure and see when it cracks open.
False on the warping. The bigger concern is that an "unsupported" wastegate on the header puts a lot of stress on the wastegate tube because of the leverage the wastegate hanging out in the breeze puts on it. Hanging a pipe off of it only puts more leverage on it. The "proper" way is to route a tube back into the downpipe. It needs a flex section in the dump tube though to account for expansion/contraction when the items heat/cool at different rates.
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Post by azmidget91 on Jan 7, 2013 16:11:48 GMT -5
OK, thanks. The guy I got it from did say he had to weld the header at the waste gate a few times from it cracking
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