Bad vibration?

[brylon644]

I have a rage composites brawler with a bad vibration. Pretty much vibrates at the middle of the rpm range, to half and after half its completely smooth. I had it in the ski last year and it had the same vibration. I completely rebuilt the ski from pump to motor and it still does it. I have checked all mounts twice and everything is tight.

Any Ideas on what else it could be?

Jm 781, solas pump, rhass motor mounts, bpipe and limited slip tank. Every art on the ski is new or has been rebuilt

 

[Harbor]

I see others complaining of vibrations from those rhass mounts. Then they switch to OE and the vibrations gone

 

[brylon644]

I see others complaining of vibrations from those rhass mounts. Then they switch to OE and the vibrations gone

that's what I'm leaning towards. Just looking to see what other people say before I swap them

 

[Christian_83]

those mounts are stiff. I run OEM GP 800 mounts, there are really strong and soft enough to deliver the power smooth
If everything checks out, alignment is good, all bolts to driveline are secure - then i would try some other engine mounts.

 

[brylon644]

Every thing is tight and the pump/motor aligned perfect. Looks like its time to replace the motor mounts!

 

[Just4Fun]

Had this problem with my dasa. Brand new cold fusion mounts and it vibrated bad. I couldn't keep the bolts in my powervalves. Swapped to oem couch mounts out of a raider and vibration was gone!!

I'd say mounts for sure. 2 cents