whats the diff in these 2 turbos ?

[clio_172cup]

1. T28 Hybrid Turbo Charger

2. GT28 Hybrid ball bearing turbo charge

 

[Mark One]

T28 has a journal bearing (same bearing used on crankshaft) They are slower to spool.

GT28 has a ball bearing. They are faster to spool.

bearing losses are also reduced. But you pay for it.
T28 technology is as old as the hills, GT is newer

 

[Nickharding]

You could blow into the ball bearing turbo and it would spin up, thats how easy to spool they are.

 

[Seriosha]

Humpf.. A Hybrid charger has different Exhaust and COmpression turbines. so you for example have a T25 Exhaust Radiator and a T28 Compressor Turbine which means that it will spool up sooner than a normal T28 but it will not produce as much power as a normal one.

 

[Andrew Cooke]

Humpf.. A Hybrid charger has different Exhaust and COmpression turbines. so you for example have a T25 Exhaust Radiator and a T28 Compressor Turbine which means that it will spool up sooner than a normal T28 but it will not produce as much power as a normal one.

'null point'

all T28s use T25 turbines. As said above, the only thing you can say from that description is that one has a roller bearing core.

 

[sideways danny]

as above, there's at least 5 off the shelf T28s that are all different, before you even start with making them "hybrid"

 

[clio_172cup]

reason for this is 2800 for engine dymanics with the 28 Hybrid Turbo Charger

and like an extra 1000 for the ktec one with the GT28 Hybrid ball bearing turbo charge

 

[Icarus]

The whole 'Hybrid' thing came from the days when we'd create turbos from bits of T3 and T4 to use on YB's or similar. They were a hybrid of two different turbo types.

The word 'Hybrid' gets thrown about all over the place these days to describe something with a none off the shelf compressor wheel/turbine shaft/CHRA. To give you a proper idea of what the difference is you really need model numbers or compressor/turbine specs.

Cheers
M

 

[stan*]

Just to give you an idea of how many "variaations" or combinations of compressor/turbin etrim, diameters etc etc:

http://www.turbobygarrett.com/turbobygarrett/catelog/Turbochargers/turbo_comparison_sheet.htm