Yes it is quite the underachiever, please show us your build again and what it makes....
Nick got this blower from me from my underachieving 331 streetcar that went a best of 8.6 but usually 8.8's with the XX volute... It is a Xtrim unit stamped right on the tag. Vortech never made a XX for the public but did make a XX volute since the impeller and cases are the same. I have one and kurgan has one as far as i know. The v24XX flowed roughly 150cfm more than the v24X with a little less efficiency than the Xtrim which was good for @ 100rwhp. The Xtrim is rated for 1300hp and the XX to 1400hp so they are pretty similar. We have been dynoing with the Xtrim so far to see what it would make and for data to compare against a couple other head units Vortech gave me to test. I personally wanted to see the difference between the X and XX since i only ever used the XX volute on my small motor so we will swap the volute before going to a bigger head unit. This car will cruise around here hit some shows, meets, and races and times will always be posted this is no grudge car so there would be no reason to care what blower it is we could put ice in the cooler, turn up the timing with some c16 or q16 and make more power i know but thats not how it will be raced so no point. Since you obviously build better setups for streeters i hope to see one of them at a true street race this year and see it resetting the record into the 7's since noone with a ford has been able to do it after actually driving 30miles and hot lapping 3 passes without opening the hood or touching anything. You would enjoy the class no wheelie bars, no slicks, no backhalves, etc... and real streeters like nicks going as fast as they can. Hope that answers any questions you might have had and lets you move onto cyberstalking someone else's builds. Good luck this year with your grudge stuff either way.