Brian,


True, they are not completely scalable.

I was wondering about that .15.... Even the best, most efficient tuned pipe cannot 'cram' more than 0.25-0.3 Bar of boost into the cylinder. You need a positive displacement supercharger, or a turbocharger, for higher boost pressures.

The best F1 pylon engines mange (reputedly) 3.6 HP from 6.5 cc, around 35,000 RPM.
This shows that the torque they make is very similar to that of a premium, tuned sport .40 engine (Jett?), that actually makes about 1.6 HP around 16,000.

So these engines work at very similar BMEP and VE numbers...

And so, I believe, must this F2D .15.... So at what RPM must this engine spin, for this 'glass ceiling' torque to make 2.7 HP?

...And I believe torque is very scalable. And engine of twice the displacement will make twice the torque. Half the displacement - half the torque...

If the RPM this engine was running is 40-42,000 RPM, it would entail a boost of over 1.5 Bar, from the tuned pipe... No boost from nitro, as this is an FAI event.

I say it again; Impossible.