BB turbos keep spinning for quite a while

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Aug 13, 2008 | 11:49 AM

lead_foot

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BB turbos keep spinning for quite a while

BB turbos keep spinning for quite a while, good example in this video:

http://www.youtube.com/watch?v=H1Mry...eature=related

Aug 13, 2008 | 11:52 AM

Christian and Beccy

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They do keep spinning for 30 seconds, sometimes more. Mine does anyway.

Aug 13, 2008 | 11:55 AM

lead_foot

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http://www.youtube.com/watch?v=hTJIn...eature=related

Aug 13, 2008 | 12:03 PM

pa_sjo

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But so do journal-bearing turbos!

Aug 13, 2008 | 12:03 PM

Chip

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Quote:

Originally Posted by pa_sjo

But so do journal-bearing turbos!

Ish, but not as much so

Aug 13, 2008 | 12:41 PM

Stavros

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But TBH, wowee.

Aside from that, the differences a BB core alone makes in actual performance is next to fuck all.

Aug 13, 2008 | 12:42 PM

Mike Rainbird

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Took me a few seconds before it clicked to figure out WTF the noise was the first time I shut down my engine after I had the BB turbo fitted

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Aug 13, 2008 | 01:03 PM

RWD_cossie_wil

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does it do any harm, is it worth fitting an oil accumulator for when you shut off with the secondary benefit of getting rid of any pressure fluctuations if you corner hard and uncover the pick up pipe?

Aug 13, 2008 | 01:04 PM

Stavros

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no harm, all turbos will still be spinning once shut off, just bb ones generally do a little longer due to not relying on oil to reduce friction as much

Aug 13, 2008 | 01:11 PM

#10

RWD_cossie_wil

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Quote:

Originally Posted by Stavros

no harm, all turbos will still be spinning once shut off, just bb ones generally do a little longer due to not relying on oil to reduce friction as much

Was thinking that it wouldn't do any harm as it wasn't under load, but just a thought about the oil accumulator.

Aug 13, 2008 | 01:12 PM

#11

lead_foot

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I didn't realize they spun for so long TBH. I can hear my GT28RS spin for a while after I've switched the engine off but it didn't seem to spin for that long. It probably is still spinning, I just can't hear it.