Just got this info so I thought I would share..
As you know BMS has been working on the JB4 for the N20 motor (Stage2) for the last month or so and they have made some really solid and amazing progress.
The car is 100% stock (tune only) Only mod is the JB4 and a 50% mixture of E85 fuel and 91 octane (e.g. approx E40 fuel).
Results: A new N20 2.0l world dyno record: 300+whp and 350+wtq!!! Baseline with factory tuning (only with E85 fuel) was 237whp. Gains were as high as +70whp (~90 crank hp) in areas under the curve.
A few comments:
1) Not ready to release all of the tuning details but will say peak boost was around 23psi (compared to 17psi factory), and in areas under the curve making as much as 10psi more than the factory.
2) As expected the platform LOVES E85 fuel. Performance on 91 or 93 octane fuel will be substantially lower but will be stronger than Stage1 power levels.
And a very interesting observation I think
3) During testing they opened up the airbox to simulate a high flow intake and determine the potential for intake power gains. In doing so they found exactly zero horsepower gained even at these high boost levels. The factory airbox is simply not a restriction at 300rw. For this reason its suggested you use only the factory airbox with the N20 platform. Companies claiming gains with intakes on this platform are potentially fooling themselves and/or you.
Mike
