Pinto rear springs

[russ5499]

I've heard that rear leaf springs give up after so many races. Should they be replaced periodically? the car runs on a 4/10 and 3/8 mile mild bank clay track. The 4/10 track has been fairly smooth, 3/8 very rough and wet. right now it has afco 159# R.R. 138# L.R. Also any opinions or advice of afco vs landrum

[let-r-eat]

Both are basically the same. A leaf spring looses its arch when it becomes weak. Here is a link to show what I'm speaking of:http://www.hotrodhotline.com/md/html/spring_basics.php Look down where it says free arch. Determine what the arch should be on the ones you have. I couldn't tell ya what they should be, maybe call who made them?If the race car is maintaining the ride heights then you are fine.

[crcltrakr]

The loss of arch is the key indicator, keeo up with it and re-arch as neccessary, you must have sufficient arch and spring rate to prevent going reverse arc under dynamic loading.

Cold rolling will restore the arch.