Vibration Question

[cumins01]

I searched and came up with nothing. I have a p-pumped 24 valve (sled pulling truck only). The problem I have is at a 2k free rev the engine has a bad vibration. Anything above or below it is okay. Could to much timming cause this? 13mm pump with auto gov.

Thanks,
Steve

 

[Warpig]

Mine does the same thing (CDS 13mm).

 

[01smoker]

My DPE 13mm pump does it too.

 

[cumins01]

Mine is a 13mm Scheid. Just checking. never quite noticed it before.

 

[Mike Holmen]

The vibration occur at one speed or different rpm? I would do a rotating mass balance. Chances you might have unbalance issues.