__________________ Mods: 91 octane with occasional 100 octane
"Illegitimus non carborundum"
" Despite its supercar attributes, the M5 still doubles as a soberly practical, spacious saloon - only with the ability to scare four passengers in comfort all the way to the local coronary unit". Top Gear
Does anyone besides Laidback agree on the 3.91 differential? Is it a must have mod? I've read alot of posts about the issues with the dinan 3.91 but nothing about Evos diff except that it is great. On the other hand, although some people have praised Evos diff, they still changed it back to stock as it was hindering their top speed. When you come to think of it, is it worth the hassle & cost of removing the 3.91 diff for the sole benefit of high speeds? Personally, I'd prefer having a better low end torque rather than reaching top speeds faster. How many times would you actually hit high speeds 20, 30 times may be more, but for people who drive their cars on daily basis, I believe having a better low end torque is more beneficial.
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Because of that thread, I was also tempted to get the diff. I'm still unsure. I'd very much would like to hear from those who actually were happy with the diff and then removed it. It doesn't make sense
I'm not an engineer, so my opinion is strickly as an M5 owner. Our cars need more torque of the line. 1st gear is weak and under hard acceleration the car seems to bog. After changing to a Dinan 3.91 diff, the difference was drastic. As far as top end speed, the M5 tranny is able to accomplish the high MPH while still having more RPM's to go. If you are drag racing, the trap speed with the 3.91 is going to be lower, but your time is also lower. Stock diff gives a higher MPH trap speed because your 1/4 mile time is longer. Best mod for the money. Unless your running NOS and then you want the stock diff for the added horse power. Any Engineers care to explain?