I'm curious which of your mods and maintenance items on your beast brought your curb weight below 3800lbs with stock exhaust intact?
And for replacing the timing chain guides, is it an item that should be done based on age, or based on mileage?
Thanks in advance, and great thread!
Mostly by measuring actual weight instead of curb weight
Weight reductions on my car: wheels, brakes, suspension, CD changer delete, secondary air delete, aux washer system delete. Not a ton-- I'm really not focusing on weight on the M5. I will be doing headers, which should add some extra lightness, but that's really just a side effect of what I'm going after.
Chain guides: I'm not sure I'd do them preventatively again. While the project overall was useful, my original ones still looked pretty brand new. Going forward, I believe I will do it in response to
1) increased steel and alu in the oil, verified by dropping the lower pan to see if there's plastic shards in there
2) Increased chain rattle, verified by dropping the lower pan to see if there's plastic shards in there