Tom, does the blower get hot after a couple pulls? You would think that with a blower being over driven so much that it would make it easier to get the egt's up... That's what doesn't make sense to me. Unless the blower is so loose it just doesn't make heat.

46 more cubic inches can easily = 60 HP or more.........

Peak tq at 3600 is way low in the way of rpms.

It was warm but nowhere near hot. If I had to guess, maybe 95-100 degrees?

Agreed, but 46 cid doesn't equate to a difference of 125 HP. Also, I agree that peak torque is way off the mark. I was expecting 4200 or so.

A Jim Oddy 468 blown alcohol motor can make in upwards of 1500-1800hp.

Which begs the question, how damn big / worked are these heads ?

And do we know the comb chamber size and where they figured into the actual compression ratio. Some blown bbc's use some pretty damn big combustion chambers.

They were setup to work on an NA 468. Nothing crazy. They were worked over pretty well to work on the 468, but nothing crazy.

Haven't heard that name in a long time. My buddy use to work for him.

With my limited roots blower experience... When you really start spinning them babies they turn into a heat sink and you can hardly put your hand on them.

Tom, can you measure the gap from the rotor strips, to the case, at the bottom of the blower with a feeler gauge, and post the results ? Do it on all 4 strips. You should be looking for around .004-.006 range.

Yep, that was my understanding too. But not hot at all.