Thanks for your replies.
I see you all agree that we might have gone to fast with the diagnostic, I understand.
It is not easy to measure torsional vibration in such small engines as this one (as rob768 points out). "Common" vibration in an engine depends on rpm if it comes from unbalanced...
Hello all and thank you for your replies
- This an engine dyno, no gearbox in it. Engine alone
- Yes, the engine is an inline 4.
- Crankshaft, flywheel and even clutch have been accurately dinamically balanced .
- Vibration only occurs ONLY at that rpm range (5200-5500), not before nor after...
Hello all. I am new in this forum though I´ve been following some posts for a long time.
We are developing a 4 cyl, N/A 2.0L endurance race engine and so got designed and machined custom billet crank, rods, pistons... Once engine is ready and on the dyno, we´ve found that there is a HUGE...