On a M20B25 this turbo came on full boost at about 3700-3900rpm (1.2bar boost) in most gears. It starts boosting very early on and provides excellent spool characteristics.
On a M50B25 is showed 0,2bar boost @ 1900rpm, 0,5bar @ 2600rpm in 3rd and above gears.
On a M50B28 it comes on full boost of 1bar at about 3500rpm.
Leaving you with half the rev range for a very wide torque curve
In both cases it´s making boost from early 2000rpm onwards
If used with a split pulse turbo manifold it will provide the best possible spool characteristics.
The inducer is 57mm on the compressor
The exducer is 65mm on the turbine
The compressor wheel has Borg Warners extended tip technology.
It has split pulse turbine housing
It has map width enhancement compressor cover
It is a non wastegated housing
I´d reccomend this turbocharger for M20/M30 and M50´s alike for anything between 300-500hp.
There is a 6week waiting period on the turbo from ordering, and what is why I can offer it at this reduced price.
This price is WITH VAT.
This is a 100% actual authenticated Borg Warner K27-7 Turbocharger
Some pics of installed turbo


