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Terry @ BMS Terry @ BMS is offline
Posts: 32,362
Join Date: Jan 2008
Default 12-04-2014, 09:57 PM

OK some good progress has been made the last couple of days. I have control over everything we need to successfully tune the vehicle.

The only hitch is one of the sensors is really difficult to reach. Probably a 30 minute job and a difficult one at that as there isn't much room to work with. You have to pull a few parts out and really contort your hand to get it in. Compare that to maybe 30 seconds total to install the rest of the connections which are right on top of the engine. On the plus side the tune functions nicely without the sensor giving most of the torque gains. You just don't get the power gains above 4500rpm.

We'll implement this tune similar to how we approach the M3 JB4. We'll Include all the connections on the harness and then allow end users to decide whether the torque gains from Stage1 are enough to keep them happy or whether they want to connect the devil sensor enabling Stage2 to unlock the rest of their top end power.

I was able to hit the private track for some tuned VBOX Stage2 runs on pump fuel and gains were pretty solid. 0-60 5.3s, 0-100 13.5s, 1/4 mile 13.8@101mph. Knocked a full second off the 0-100mph which was impressive. Stage1 times were a bit better than stock but with the car shifting itself around 6000rpm after the first gear you are working from a part of the power band that isn't increased much with Stage1.
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