Quote:
Originally Posted by Randy W
The logic you are using suggests that the speed that a car travels over a bump has no relationship to the acceleration at which the damper shaft moves... Gee, I may have to test this on the speed bump outside my house at slow and high speeds! Hilarious!  |
That is not the logic I used. It is the logic you [incorrectly] surmised I used. Yes, you are correct, the faster the car is going the faster the damper shafts moves when going over a bump. However, if you go over that speed bump outside your house at 30 MPH or 80 MPH, the high speed compression circuit is going to be dealing with it. Go 5 MPH over it and low speed compression circuit will most likely be involved.
The fact is that at normal track speeds, high and low speed corners do not correlate to the high and low speed compression circuits.
Quote:
Originally Posted by Eagledriver
Every track has surface irregularities. If there was a perfectly smooth track we could run no suspension at all, like a go cart. When you hit those irregularities at high speed the suspension moves up much more quickly than at slow speeds. Think about a rock climbing 4X4 going 2 MPH. The tires move up and down very slowly then. This is part of why a race set-up is not the same as an autocross set-up.
|
Yes, you are correct. All tracks have surface irregularities. Did I say they did not? See what I wrote above.
An autocross setup usually requires more compliance because parking lots are often quite irregular. Also, understeer is a bigger issue so it is common to have a stiffer rear setup. Most of the bumps you hit autocrossing would be controlled by the high speed compression circuit. Even in the slowest corners.
Scott