I already offered to test it. For free. I’m just not doing the work. But it doesn’t take a ton of logic to understand that if there is ANY gain it will be 1. Well within the margin of error and 2. It will be so insignificant it won’t matter.
As an example, let’s take a 275 HP 340. Swap the pistons bank to bank. A 1% increase in horsepower would now make it 277.5 horsepower. If it make a 5% increase (and I say ain’t no way in hell reversing piston offset would gain 5% or every piston manufacturer on the planet would do it...for a 5% gain in HP I’d consider prostituting my wife...well, maybe not now but when I was younger I would have) 288.75 HP. The former is a 2.5 HP gain and the latter is a 13.75 HP gain.
IMO 5% would be a DisneyWorld fantasy number. The 1% number is far more likely. Even if we consider the same number of 1% on a 500 HP engine you gain 25 HP. I know for a fact that any engine builder would beg for the 25 HP for something as simple as an offset pin. Yet I don’t know anyone asking for it.
Even in induction limited class racing like 2 barrel circle track stuff no one I know of is doing it. And none of the engine builders I know doing that stuff are back markers.
It just doesn’t add up. That’s not a knock on UT. That’s putting math to the myth.
EDIT: I forgot to add there is the assumption that the guys writing the books did the testing. Highly unlikely they tested it.
