So I have a sneaking suspicion that those "dyno numbers" aren't real. But a calculated number (that may or may not be close).
Why do I think that? Because of this post made by the owner.
Dyno numbers won't come from the X-1, ever. You don't 'make a dyno' with data provided after the fact. The best that you can do is use some variable from the X-1 (say MAF and Load), plug it into some formula that might be accurate. And that is what it sounds like to me.
Are those dyno numbers accurate? Who knows? They could be dead on, or they could be very far off. We won't know until the truck is on a real dyno (again, may or may not be accurate).
Is the truck fast? Maybe, maybe not. Put it on the drag strip, or snag a 0-120mph vid, then we will know if it is fast.
The numbers posted would provide a very solid 11 second quarter (with good traction - 1.5-1.6 60'), and be capable of +118mph and probably closer to 120mph (or higher) if he can stay in the throttle the whole time.
A small side fact, is that I know that Allan doesn't like chassis dyno's because of the inconsistency and inaccuracy. He is an engineer, and relies on reliable and consistent data. Which is why if he would opt to use his own engine dyno vs a chassis dyno at some shop.
ps.. $20 fagboa starts crying on CT about this post.