The BNR Stage 2 hybrid is an improvement over the stage 1 in a few ways. The most visible improvement is the TO4B compressor housing and backing plate. What this does to improve the efficiency of the turbo is to gain overall volume of air with the larger compressor housing. You can see improvements as much as 10-15% when you go to a larger compressor housing. Another benefit to the stage 2 turbo is it has the 360 degree thrust kit. What the 360 bearing does is provides a constant supply of oil to the rotating assembly to ensure that the rotating assembly is in constant contact with oil when pressurized. The factory 270 degree thrust bearing has a 90 degree relief which does not have a constant contact with oil and acts as a oil drain for the thrust bearing. A 270 degree thrust bearing is not fatal to a turbo, but when you start running an abundant about of boost, friction will start to work against the two metal pieces.. Also with the 360 thrust comes a dynamic seal instead of carbon seal. What this does is decreases friction on the rotating assembly therefore improving response.
The 87-88 BNR Stage 2 comes with a 360 thrust kit, T04B package, all new bearings and piston rings, clipped turbine wheel, balanced/ blue printed rotating assembly, 34mm wastegate port, and a 1 year warranty. The S5 stage 2 also comes with a ported wastegate and all of the above options..
We have customers that have been very pleased with the performance of the BNR Stage 2. One of which made 332 RWHP at 14 psi, and the other running an ET of 12.3 at 114 mph in total street trim. The turbo responds like the BNR Stage 1, but has the extra edge of reliability at higher boost levels and also the extra volume of air with the larger compressor housing. This turbocharger upgrade is bolt up and no fabrication is required.
Core Exchange is required on this item of $500.00
This will be charged on purchased & refunded when exchange core arrives at MPS Garage
fully rebuilt
balanced to .5 gram/in2
T04B upgrade package with 3" inlet and 2" outlet
T04B H3 compressor wheel
360 degree thrust bearing assembly
clipped turbine wheel
ported wastegate
adjustable wastegate actuator
turbocharger clearanced for easy install
