Quote:
Originally Posted by Max Well
Thanks for the update, Rob. Even though Crash will be missed by you folks I am sure, as we already have his 'stock' 35i data in the database, unless he changed things up by unloading weight, it seems likely those previous runs are a good indication of the 35i's performance. What we don't have is 'stock 28i' data, however.
My gut feeling is that the model slightly over-estimates the efficiency of the X3's power usage, as one can see Crash is consistently below the model's prediction (albeit very slight). As the equations are identical for the 28i, and assuming BMW was able to match the efficiency of power transfer during acceleration between the two engine types, then by having mge92 even with the 28's prediction with his Dinan-tuned engine, I am guessing a true 'stock' 28i should land below the model's 28i curve similarly as Crash did.
So if you can make 2 or 3 runs with setting 'C', if that is truly considered 'stock' (or if someone else is coming who owns a stock 28i), then that will provide a good validation for the 28i's curve, which we still do not have.
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I can do a 28i (2 runs "if my 1st i don't get a good launch then i'll attempt a 2nd run" on stock with the RaceChip dummy on so it will have RCU disabled), then 1-2 on C, 1-2 on F, and hopefully i get there on time to be able to test higher settings.
Although my gut feeling says RCU on C (stock setting) will be similar to the Dinan stage1 performance and I rather not waste more than 2 runs on stock 28i and RCU stock performance since I was only able to test D and E setting on RCU (which is 1 above C, and 2 above C).
We will have a F30 328i with ActiveAutowerke8 tune so it will be nice to see how the smaller sedan N20 engine with a finely tuned piggyback will do.