What is accepted tolerance for new aftermarket valve springs?

4spdragtop said

The springs we installed were singles with damper. 901-16 I believe. Have caused no issue in the 273 but was on the fence whether to reuse on 340. They are 6 years old with maybe 15k on them.
Once I have a few more beers I'll see if I can duplicate your tester lol.
Thanks for the info/tips!

Click to expand...

you're welcome and here are some pics of the setup - it aint no Rimac but with practice it was not too bad for ball park figures. The newspaper is just there for protection - between the heavy plates and the glass top of the scales. That was an early experimental setup - I have since moved the plates underneath - they are there just to give some height and stability. (scales are in kgs, not pounds!)