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Location:
Brisbane
Registered:
February 2003
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Re: what turbo is this
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Wed, 15 June 2005 09:17
 
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perhaps is an ex SR20-DET turbo?
something from an RB20 looks like this:
<http://www.mkhala.com.au/thechuckster/RA40_rebuild _thread/big_worm_rb20_turbo.jpg>
and this
<http://www.mkhala.com.au/thechuckster/RA40_rebuild _thread/t25_on_manifold.jpg>
Glowing turbo/manifold while on cruise (from my experience) is a combination of running rich and (most importantly) timing being retarded way too much.
Combustion is still occuring when zorst valves open so you get incredibly high/hot gas in the manifold (hence the boost while trying to cruise) and as a result the turbine housing gets uber hot despite the fact that you're trying not to boost.
wastegate creep would be a lack of boost when trying to boost.
Before you destroy the bearing, turbine and zorst valves you might want to stop and re-check things.
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