Drag Racing Discussions > Front Engine Dragsters

The testing of new rods

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dreracecar:
For aluminum rods, one should purchase a "GO-NO GO" thread gage to test the threads in the rods.
Failure can happen at any point, but every time you torque the rod bolts you put stress loads on the threads, and that's what kills the life span. you are not running fuel and they dont have to be looked at every pass you make.
 From what Rod manuf taught me was new rods always take a set around the big end and to put 10 passes on a set of alu rods, pull them and have the big end resized, and then you can run them for a very long time

aafa760:
Bruce
same story I got for the new GRP Fuel rods.
My new BBC rods will get checked after Tucson for bearings.
just for my comfort of course lol

THE FRENCHTOWN FLYER:
I have broken one aluminum rod in five decades of racing. I neglected to change them and kicked one out at 294 passes (inline six, on gas).

After that I always changed them after 293 passes.


Just kidding - I switched to Oliver steel rods about ten years ago. Ran the same as with aluminum.

wideopen231:
A lot more to it than just number of runs. RPM,piston weight,how treated. Do  you rev crap out of motor when cold,do you netrual after finish line or let motor slow car down? For me keeping check on rod bolts for stretch has always been top of list.

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