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White Exhaust Wheel And Wastegate Flap - Why

BANGN

By BANGN,
in Engines & Forced Induction

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BANGN Experienced

BANGN

Posted
Posted

Taken my chirpy RB20 16V Turbo off to replace it with a larger item but noticed something I have never ever seen before on turbos..

my exhaust wheel and around the waste gate flap and the flap it self is white! its allmost like bleeched clean white :S nothing else is this colour, the housing is all soooty black like normal.

any ideas? I dont think its running lean as dyno couple weeks back indicated rich figures.. i have replaced oxy sensor since the dyno and fuel economy has slightly improved but yeh never seen this before..

BANGN Experienced

BANGN

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Posted

yeh its got up and down play as well as side to side LOL not terrible but not good :)

im changing the turbo today anyway but was a bit worried when i saw what i saw

i can afford to run 95 atm, its relativly stock but I know once i put the nistune on it I will need to go 98, my last 32 used to ping on anything but 98

MrStabby Grand Master

MrStabby

Posted
Posted

Its supposed to have some free play (more than you may imagine) - you're not going to know if its a problem unless you measure it and check the specs.

My experience with ceramic turbine is that its black.

The so called "knock" map on std nissan ECUs is also known as the "regular" map, is for regular (not premium) fuel. I *think* its designed to work on 95.

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