MarinS4

The centers are liquid cooled (oil or water). When I installed mine I split the feed line and sent oil to the cooling side. Both the cooling and bearing side get restrictors. They are cooled by oil just like the factory K16's. The only difference is the cooling oil is separate from the bearing lube.

At 1.4 bar and race gas you will be close to 500whp if the exhaust flows well. You will have to drill out the air box cover for better breathing. I have seen this make a big difference on the high HP cars.

Not sure where you would be on 93 oct. We only get crappy 91 out here. I would venture to guess 425-450whp at 1.1-1.2 bar on 93.

MarinS4

For the technical people I will explain what I see on these turbos that I think really makes a difference.

The compressor wheel is a billet extended tip design. This is the latest technology in compressor wheel design. It broadens the compressor map resulting in cooler air over a broader part of the powerband.

Modern compressor housing.

Ball bearing center section reduces drag for much quicker spool.

The wastegate exits parallel to the turbine (as opposed to K16 that blows across turbine) and is seperated by a cone. This design increases turbine efficiency and overall exhaust flow.

Quadcammer

Interesting, thanks for the info.

Whats a set of these puppies cost?

MarinS4

I am not sure. Check with Tial or one of their dealers.

Basal Skull

Allowing 1.4 bars sound like quite a bit for a stock engine. All the turbos that have been talked about here can give that, but suspect stock parts wouldn't last long at the track without head sealing/welding fins. I guess you can turn up the boost but it's a cost/proformance risk/ratio. We tend to hear about how well peoples engine run but don't hear much about engine failures / rebuilds which I know have happened....