Forum: Sprint Car Tech Talk (go)
Moderators: BigDog

Hi all,

I have a query in relation to chassis. Why do drivers/teams replace them every 12 shows or so?

People say they flex, some say they don't flex. Others say they don't "work" and so on.

What determines a lifespan of a chassis?

What is the difference between a chassis? I believe that there is little difference between a Maxim and a Triple X comparing measurements of them etc.

I'm interested to hear peoples theories on this...

Thanks

a lot a drivers dont like changing chassis at all. I remember asking one of joey saldanas crew guys how long they like to use a chassis for and he said till they bend it, but they change all of the running gear every 20 races. I find changing chassis always puts you behind for a couple races cause they always react differently, even if they are ment to by identical.

I think part of the theory is that they are built so light that they start to experience metal fatigue and do not stay as rigid as when they are new. But it seems to me that the manufacturer should be able to supply some kind of torsional test data on a new chassis that could be used to check whteher or not an older car needs to be replaced. I wonder how long the top manufacturers say the chassis is good for?