I ordered a Syvecs for my 335i a few weeks ago and I'm still waiting for it to arrive. Meanwhile, I've been talking with Rac from Australia about some of the issues involved with the base map that Syvecs provided him. He was kind enough to share his base map with me, since I haven't bothered to contact Syvecs Support yet.
First off, the Syvecs base map's Run-Mode Fuelling is set up for a 4-dimensional model that uses tables for both manifold pressure and throttle position, and there is a separate table used to blend these two curves together. Presumably, this was done so that the ECU was truly plug-and-play, requiring no mechanical modification to work. The base map had no values in the MAP table and only the TPS table was populated. I don't plan to use this setup, as I'm opting to move the boost pressure sensor from the chargepipe to the manifold plenum so I can run a traditional 3-D speed density model.
Since there are no values populated in the Base Injection Time tables, you would be starting from scratch unless you copy the TPS fuel table values to the MAP table after taking into account some known data points correlating throttle position to MAP values. For example: your throttle position at idle and corresponding MAP, or throttle position at 14.7psia (atmospheric) could be used to generate a rudimentary fuel table for a few different engine speeds. The Secondary Load Injection Time Blend table would also need to be zero'd out, as it was populated with 100% in the entire table for using throttle position as the only load input.
Rac said this worked ok to get the car up and running using MAP only. All he had to do was swap sensor locations. Has anyone tried a similar strategy to get the engine running using MAP only? If so, how did it work? Did you do something else entirely?
First off, the Syvecs base map's Run-Mode Fuelling is set up for a 4-dimensional model that uses tables for both manifold pressure and throttle position, and there is a separate table used to blend these two curves together. Presumably, this was done so that the ECU was truly plug-and-play, requiring no mechanical modification to work. The base map had no values in the MAP table and only the TPS table was populated. I don't plan to use this setup, as I'm opting to move the boost pressure sensor from the chargepipe to the manifold plenum so I can run a traditional 3-D speed density model.
Since there are no values populated in the Base Injection Time tables, you would be starting from scratch unless you copy the TPS fuel table values to the MAP table after taking into account some known data points correlating throttle position to MAP values. For example: your throttle position at idle and corresponding MAP, or throttle position at 14.7psia (atmospheric) could be used to generate a rudimentary fuel table for a few different engine speeds. The Secondary Load Injection Time Blend table would also need to be zero'd out, as it was populated with 100% in the entire table for using throttle position as the only load input.
Rac said this worked ok to get the car up and running using MAP only. All he had to do was swap sensor locations. Has anyone tried a similar strategy to get the engine running using MAP only? If so, how did it work? Did you do something else entirely?