I just pulled my 2001 M5 from storage. Had new battery, fluid changes, sway bar brackets, fluid changes and thrust bearings changed when pulled from storage. Friday just had my AS3 tires pulled and had Pilot Sport PS4 tires installed with everything aligned. Car is tight and engine buttery smooth and quiet. Itís got 44.5k and I really enjoy driving it.
Now my question. I see when EAG sells their cars, they either install Dinan upgrades or their customers ask for upgrades to be installed. I want to know, the benefits of doing Dinan upgrades and what will I give up over stock if I move forward. Will the car be brutal on Chicago area roads? I am not interested in discussion of shock brands, strategies, etc. It would be Dinan. I read many postings including Ryan Schultz from E39 source. Nor am I interested in impact of car value. After recent dealings, I have no interest in getting back into selling my car. I am a retired geezer that lives to drive through country and mountain twisties. I donít drift or track the the car. Itís just that In looking at EAG Dinan package is on almost every car they sell. I figure I would need about 20 to 30k investment. Just donít want spend the money and find I regret it (and donít want end up pulling parts and selling)
As a long time E39 M5 owner, not sure you really need many Dinan upgrades.
The one place I think they did a better job than the factory was shocks and springs. They don't have their own shock. They went to Koni for that and supposedly gave Koni the specs they wanted. Their Koni setup is very comfortable on the street, yet not at all floaty. It can be used at the track, although the springs are a bit underdamped for that. But short of track work, it is a great setup. I don't know that it is even available anymore (they later went to adjustable JRZ shocks), but there is plenty of discussion here about Koni "yellows" being close. Their is also a discussion of their springs and spring rates and progressive vs. linear.
Rear wheels up front and an adjustable rear sway bar will certainly help handling with the wider wheels and tires a bigger help on the street. I also prefer X5 thrust bushings over Dinan monoballs for the street.
If the car is quick enough, what other items are you contemplating?
Dinan Stage 3 suspension, SS jet coated headers, ESS SC kit w/ 1 range colder NGK's, 92mm pulley, 440 Big Greens, TTFS alpha N tune for meth, RK plenum plates, SBC Endurance Stage 3 Kevlar performance clutch setup, "Jed" lightened DMFW, open brake ducts, TEC cupholder, U.S.(Euro style) tilt/slide armrest, 6k HID fogs, Umnitza bi-xenon flamethrowers w/6k super white low beams, rear fogs, V1/Stealth1, dual head LI, 2.65 diff w/40% lockup/2x dynamic, compact spare, Euro trailer hitch, Mocal oil cooler, ACS type rear spoiler, Rogue custom SSK and tranny mounts, ST 355 BBK (fronts), BP sway bar brackets, Bluetooth retrofit, Speedhut boost gauge (20 psi), Dinan TB's and VS, KB BAP, Howerton/HFS-3 Aquamist WI trunk setup (50/50), with 2nd gauge in rear view mirror, aftermarket trunk mounted sound system integrated into stock unit (amps and crossovers and sub and speakers).......