As many of you know we were fortunate enough to purchase a BMW M2 earlier than many. This Sunday we figured we take advantage of it and put some time in our R&D and testing because we are lucky enough to have a proper dyno facility and suffiecent amount of air to replicate close to real world environment.
Seeing how we posted one of the first dyno runs in United States, we were not sure what to make of the power. But the car made strong consistent numbers back to back. Other vendors who we all love and respect such as the guys at iND and Active Auto put identical numbers showing the car M2 is consistent across the country which was good to know that BMW got it together. We installed a custom down-pipe on our car and the gains were fairly decent perhaps because the car had less than 500 miles and was flowing very well.
The car showed 15 psi stock and we modified the factory ecu with our stage 1 tune to 17 psi. The M2 like the M4 and M5 platform is very much tuneable especially when the computer is not being tricked with piggyback that hits torque limiter or require a back end flash that requires an ecu to be taken out of the car just like ecu tuning. This motor is very strong and it does not heat soak. We did a number of back to back hard runs and the car was very consistent and impressive.
One of the benefit of ecu tuning is you can tune it on 91 or 93 without having to worry about the car pull timing and drop boost because the vehicle does not like the fuel in the car etc. We are expecting to raise the boost to 20 psi for our stage 2 tune once she reached 1k because we have noticed as the car breaks in more the numbers appear to be get stronger and we got a little lazy working on a Sunday morning.
We did some testing with 93 fuel and doing a E85 blend for a E30 mix on the dyno back to back from our initial back to back 93 runs. The car gained very little after several back to back runs. Please note we did not change the ecu parameters at all simply look for consistency of power and fuel mixing blend possibilities. In fact the car had a dip in the power after the addition of e85 blend. We believe the blend may help keep the power from dropping due to its cooling characteristic on very hot summer days, but it did not gain as much as we had hope and others have assumed. We are confident we can custom tune the factory ecu with down-pipe close to the 450whp range. Please be patient as we are eager to get the car fully tuned. The car will be at Wannagofast in Hot Springs VA were our shop M2 will be raced in the 1/2 mile rolling event. I know threads like this tends to create a lot of opinion, while we all respect everyone thoughts lets keep it civil.
Here is a where the magic happened and the runs.
93 Octane Runs
93 + E85 Blend
93 vs Blend on the same graph
