Springs rate help
Springs rate help
(OP)
Im dont know how to work out the spring rates that i need. I building a new car for next year. I race short oval stock car, it will weigh in at 625 kg, i dont know where to start or any sums etc. Any help will be VERY much appreciated.
regards jason
regards jason





RE: Springs rate help
Regards
Goran Malmberg
RE: Springs rate help
RE: Springs rate help
Failing that what steady state lateral g do you run?
is it a smooth track?
do you run aero?
do you hop curbs?
Cheers
Greg Locock
Please see FAQ731-376: Eng-Tips.com Forum Policies for tips on how to make the best use of Eng-Tips.
RE: Springs rate help
185 225 rear
on that car. I thought the more upright they go the softer the springs needed?
there some smooth tracks some not. we dont run areo and dont normally hop curbs.
So do i find out what wheel rates i currently run then try to get them the same or inprove them?
Ive just bourght rollcentre software dont know where the rollcentre needs to be either.
regards
RE: Springs rate help
We can not in general "improve" things, it is more a question of balancing the car to suit your specific track condition, provided the wheelrate are in the ballpark.
Yo must also separate the vertical wheelrate from that of the wheelrate in roll to get a picture of the balance of the car.
The roll centre is dependent on the geometry like camber gain, but also the CGH. Not to mention the tires in use.
It seem like a good chassis dynamic book should be on your list.
Kind Regards
Goran Malmberg
RE: Springs rate help
so 150/0.76 = 197 the shocker angle are 18 deg so i found you divide 197 / .90 =218.8 ibs (i found a angle correction chart)
is this correct??
RE: Springs rate help
Regards
Goran Malmberg