Drag Racing Discussions > Front Engine Dragsters
FED bounce problem.
Curly1:
Data logger driveshaft sensor is showing bounce and tire spin. I also feel it and others have seen it. Could chassis be too Rigid? I guess it is possible but I can see flex and feel it flexing so my thinking is it is probably too much.
When the car pulls a wheelie you can see the flex in the chassis. You can also see evidence of chassis flex on the body panels. It pulls wheels up nicely and carries them out a way then sets them down pretty soft. But I think after that it is still flexing some and causing the bounce in low gear and after the shift.
gregm784:
Silly question, is the car or the track?
mine bounces good on some tracks. driveshaft speed looks like a sewing machine needle.
BK:
I've heard of adjustable cables in rear engine cars.
What are they for and is it anything that might help your problem?
wideopen231:
normally. Cables in rear engine cars are right in front of drivers compartment. They are adjustable tension wise and allow car to arch more while limiting travel in opposite direction. If car flex is from downward motion and reactions.Then I guess they could help Curly there. Now that is my understanding.Not chassis expert like Roo man and Bruce,but I have slept in holiday inn(or what motel in commercial).
Curly1:
I simply do not know just looking for a way to verify it is right direction before I do something more permanent like welding more diagonals.
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