eTiLiKo

iTrader: (1)

OEM EVO IX turbo : what is the specified value for the clearance between compressor wheel and housing? And for the turbo side?
Thanks

sparky

iTrader: (1)

If you don't mind my asking, why are you wanting to know this spec?

eTiLiKo

iTrader: (1)

Because I want to compare the accuracy of aftermarket stock appearing turbos with the OEM unit.

eTiLiKo

iTrader: (1)

BUMP.
FP?CBRD?Anyone have this info?

Agent Orange

iTrader: (1)

The Evo 1-3 TD05 turbos were 0.4-0.5mm clearance on compressor side as per the FIA homologation papers, can't see that having changed much on the newer TD05s.

eTiLiKo

iTrader: (1)

Are you sure?
This is an EVO IX FIA homologation, but I can't see any info on this tolerance

Agent Orange

iTrader: (1)

The homologation normally states the compressor wheel inducer diameter and also the cover inlet diameter at the same point, from which clearance can be calculated.

I use 2 layers of electrical tape as a gauge in the comp side, and 3 layers on the turbine side when machining hybrids.

eTiLiKo

iTrader: (1)

Not in the EVO IX homologation.
At what tolerance have you set your hybrid?

Agent Orange

iTrader: (1)

I aim for around 0.5mm on the compressor side and 0.8mm on the turbine side and use layers of tape as a gauge when machining.
Works for me.

Do you have reason to worry about the clearances of an aftermarket turbo?

eTiLiKo

iTrader: (1)

A turbine machinist here in Italy after inspected some aftermarket EVO IX turbos says that 0.5mm is way too big for that clearances, so I want to know what is the OEM admitted clearances.