R3-R2?

[ron@crall.com]

My error, I was thinking of 115/145 avgas, not 160. It was used in many of the supercharged aircraft during WW II

The dual rating is the lean/rich mixture rating.

[ron@crall.com]

Back to MFG's question,

Paxton did make a "Competition" blower. The one in 63R-1025 was painted black instead of orange. Never thought much about it, lots of stuff in that car was not typical. The impeller exploded one day, thankfully none of the shrapnel made it to the cylinders. I called Paxton to get a rebuild price and shipped it to them. They called back and advised my quote was no good because I had a "competition" blower. If I wanted it repaired it would cost more. That said, there were multiple pulley options, bigger crank or smaller blower that could change the output, and there was a different blower also available.

[PackardV8]

As mentioned earlier, the competition supercharger was sold with no warranty. At high RPMs, it had a lifespan measured in hours, not months or years.

jack vines