Anyone know how fast you can run an XR drive before cavitation or excessive drag comes into play? I know it's good to 90's by experience. I also ran a nose cone in 100's.
Looking for stock lower info.

OSG ran his ITS's XR's 113mph.

That will work for me. My guess is as long as it's not surfacing too high? If so, then go to a Speedy or Imco lower?

I always heard 90. Dave

Thats what I heard also. But.

i picked up from 92 to 96 by adding a cone on mine two years ago i think they are good to 90 but they are better with a good noise cone

there are quite a few cats running well over 100 with xr's.....

Bravo XR's with sportmaster lowers 136.2