Tight and then loose.

My car does ok for about 10 laps and then gets tight in the apex, then gets loose off. I have done afew things but still a problem. Any Ideas?  

First, What changes have you tried?

crosswieght?   Springs? Stagger?

Second, there are articles on Circletrack.com that covers this exact situation, Its in an article about balanced setups.  

Thanks for the tip. I'm kinda new at this forum thing and I kinda like it. I've totaolly soften the car up and it helped alot. The car is pretty good right now except for the push at the apex and when it bites it breaks the ass end loose. It starts the push at about 12-15 laps in.
Thanks again for the tip.  

hi drw152, my name is rich,
   are we talking dirt or asphalt?  and much banking is in the track?  it sounds to me like what is happening is that as the fuel burns off the car picks up a push at apex. this could be because you have too soft of a spring on the right front,as you burn off fuel the car will automatically want to transfer more weight to the front anyway and if the spring is too soft it will not hold the car up and cause the car to push, and one other thing is if you are aloud to use a brake balance bar you could try putting in more rear brake too help the car turn getting in the corner. try those things out.