Help with calcuation!

[stoffe64]

Hello all!
Im very confused now,i had these data about
A holset Hx60,which said that the comp wheel
Is 76mm inducer and the turbine wheel is 90mm
Well,after taken off the housings to measure
I get totally confused with my math!?
the comp wheel inducer is 76mm as stated
But the turbine wheel exducer is 86mm(nothing strange
With that)But the maths tell me that that was an even
Worse combination for a turbine engine!
Someone please help me out here to calculate!
best regards/stephan

[racket]

Hi Stephan

76/86 is a good combination , start building :-)

Cheers
John