I'm shuffling around a few ideas for tunes. The least expensive is the Shark tune available on the tuner motorsports website at 349$. I've also found Active Autowerke, at 599$ and power chip at 699$.
Would anyone care to respond with their opinions?
Don't waste your money on the shark tune. IF you go with powerchip, sign up if your haven't on m5board, and you can get the m5board discount of $500.
I have the powerchip tune and am pretty happy with it. Had the shark before it and it is garbage.
This forum is kinda dead E39 M5 wise.. go to the M5board forum for tons more info and a dedicated group of M5 heads. (We all took the red pill)
Don't leave the duck there. It's totally irresponsible. Put it on the swing, it'll have much more fun.
Get the evolve alpha-N tune and you'll never need to replace your MAFs again
P.S. head to m5board
Evolve or Powerchip
Evolve seems to be really active on the M5board and has great reviews and customer service. I'm debating on getting a tune, but I think a supercharger is the only thing that will make me happy.
2001 BMW M5 Titanium Silver. Black Interior/Grey Inserts and Aluminum Trim 104,000+ mile club, F&R PDC, and rear folding seats
OEM Wheels - Powder Coated Black
Air Filters - aFe
Stebel Air Horn
Aluminum Brake Ducts Inlets
B&G S2 Sport Springs
H&R 15mm front spacers
Royal Purple Transmission & Differential Oil
Castrol TWS Motor Oil
Passport 8500 X50 - Hardwired by Oval Mirror
Parrot Minikit Slim Bluetooth Speakerphone - Hardwired by Homelink
LED license plate lights, LED Angel Eyes, & Interior LEDs (all from BMWLED.net)
M5 side emblems - Grey/White (thanks to fellow member Strike)
Route 66 Extended Warranty - Main Street Deluxe Coverage ($2,060 3 yr/36K purchased on 9/13/2011 w/99,680 miles)
Got the evolve tune and am happy with it. I don't mind changing out the MAFS every once in a while. It's the stuff that you can't fix that I really like (SAP delete). Add to that good customer service, the best product, and the extra cost is well worth it.