I'm thinking about putting one of these in my daily. I usually go 100k miles on a timing belt.

For my track car...how many days before I replace the belt?

 

Every motor rebuild is what I do.

Gates recommends 60k for severe service, seems alittle high for a race motor.

I have a good video of one of my dyno pulls showing how much deflection the belts get around 7500rpm.

 

Should last the life of a race motor, or ~100 hours.

 

How about the life of a fairly built track motor, since... well the majority of us here don't have "race" motors? I've got around 20k of mixed driving and about 10 track days on mine. I'll be changing it out this winter for good measure but doubt it's needed.