Quote:
Originally Posted by BBri89
STAGE ONE Remap
I'd been planning to get the car remapped however due to work situation that got pushed back a little bit.
I've just got back from getting it done by WG Motorworks who specialise in performance tuning, mostly of BMW M and Vauxhall VXR vehicles.
Very, very pleased with the results, and combined with the xHP gearbox tune, it is a completely different car to drive compared to how it was a few months ago.
As you can see from the graph, previous peak torque was 270ftlb.
Now, between 1900rpm and 4150rpm we've got 270 or more available, with a new peak torque of just a fraction under 320ftlb at about 2600rpm.
Previous peak power was 172hp (down a little bit on what I expected for the N47 181hp/184PS but not too bad).
New peak power is up 42hp to 214hp, hitting the old power of 172hp about 1600rpm earlier.
It's still reasonably conservative, we could have pushed it much more to achieve a bit more power, but I'm not chasing numbers. I'm after drivability and reliability.
Inlet temps, boost, fuelling, EGTs pre/post-Cat etc are all still nice safe numbers.
It now drives brilliantly, really can feel the difference, particularly rolling acceleration, like on a slip road or overtaking other cars.
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So just for a bit of fun I decided to compare acceleration before/after the remap, using the BMW M Drive Analyser app.
Ignore the Acceleration Max on the before, I had the phone laid face-up on the cupholders so it was recording 1G in the wrong direction. For the afters I had it in a phone cradle correctly oriented.
These tests were conducted on the 3/4 mile driveway of a private property that I had permission to use, and not on public roads.
I just moved from holding it gently on the brake pedal to flooring the gas. Didn't use launch control. Sport mode with gearbox in S.
I'm sure I could get the times down using launch control and optimum shifting in manual or by tweaking xHP shift points. But I'm not a numbers-chaser, it was more for comparison of before and after.
And I'm impressed with the comparison. I already felt a massive difference in the way it drives, but the times put it into context.
Cutting 1.6 seconds off your 0-60s is pretty good going. 4 seconds off the 0-100s.
Will be interesting to see how the remap affects fuel economy. Most people seem to say that Stage 1 actually improves mpg, so when I fill up next I'll reset the trip computers and compare to my usual mileage economy.
0-60 before remap
0-60 after remap
0-100 before remap
0-100mph after remap
