S4 / RS4 (B5 Platform) Discussion Discussion forum for the B5 Audi S4 & RS4 produced from 1998-2002

With all the turbo sound paranoia is there really no way to tell if one turbo is on the way out?

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Old 10-30-2002, 09:57 AM
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Default With all the turbo sound paranoia is there really no way to tell if one turbo is on the way out?

Is there a way to compare the output of each turbo individually?

If not what happens say when one turbo is not broke, but not exactly healthy either? I would guess that the boost would come up to requested, but not as fast as it should.

In that case we should probably plot the requested vs actual boost under the same conditions and compare bunch of cars. Say 1st gear from a stop with no launch. Maybe record the altitude and outside temp.
Old 10-30-2002, 10:23 AM
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Default Mine screamed REALLY loud...

So loud that there was no ifs' ands' or buts about it. I made it to the dealer before they blew and saved my cats. Don't worry about if they are on there way out or not b/c there is nothing that you can do, so just drive the car 8^ )
Old 10-30-2002, 10:34 AM
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Default You might notice the car down on power above 75mph...

...because if one of your turbos isn't doing its fair share of the boosting, above that speed, the other one won't be able to fully compensate. My car felt a little slow at those speeds for a couple of weeks before a turbo went.
Old 10-30-2002, 11:31 AM
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Somebody should post a WAV file, something like the exhaust page.
Old 10-30-2002, 06:43 PM
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Default somebody did a couple days ago, sound from a supra twin turbo, souded awful, not the normal spool

sound at all, it only really started screaming at like 3800 rpm all the way up.
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