Turbo specifications explained
The HP range is the recommended power (hp) range. If 250-650 hp is listed, then it means that the turbo operates best within this area, however it will still delivery boost and power beneith 250 hp and it will still provide more power than 650hp. When analyzing the compressor map the maximum air volume, i.e. power, can be more deeply analyzed. All compressor maps are found on each product page.
The new racing turbos all have the new double low inertial bearings. The new double low inertial bearings spools up appr. 15% faster than normal 360 degree trust bearings.
The racing turbos all have the new forced billet compressor wheels. It starts with a solid forced aluminium block and from here milled out to the specific profile. The benefit of the billet wheels are:
All turbos has the new lightweight inconel turbine wheels. The benefits are:
When oil inlet reads M10x1.0 it means oil inlet has a threaded inlet with the M10x1.0 theat. All selected racing turbos also have possibility to use an inlet flange as two threaded M8x1.25 holes are positioned beside the e.g. M10x1.0 oil inlet hole (see flange #7). Meaning it is optional whether to use the threaded oil inlet e.g. using AN fittins or simply buy the flange #7 for oil inlet. Oil outlet is always a flange on our selected racing turbos. It is numbered by the flange # as found beneith. Amost all of the racing turbos e.g. MPR59XX - MPR65XX turbos has the flange #8 as oil outlet flange. All flanges can be purchased - see the section "Related parts" to order flanges.
Generel it is recommended that the bearing housing is not tilted more than 20 degree for correct oil flow (see image under next section for watercooling).
Antisurge or Reflow ore Recirculation as it is also named is the function that allows the compressed air to recirculate if the engine is "blocked" or limited in consuming the outcomming air. The antisurge feature allows us to pair big compressors on small turbines and hence getting really fast spool-up and still operate in all areas without "compressor stall" on small engine displacement.
NOTE: Now when refering to a MPR6559 turbo - that requires that you know exactly what you are reading. Masterpower ALWAYS reads compressor indcuder + turbine exducer, meaning small end in and small end out. Those we believe are the only and most important figures to estimate power range. Precision Turbo use the same terms on their product e.g. 6262 whereas Garrett use the last two numbers for compreossor exducer GTX-XX82 and Borg Warner use the same compressor exducer on their first two numbers EFR 76XX. So be carefull to measure apples and apples when comparing turbo specifications just from the product name.