In Chamber Testing

[Barry Bordes]

Originally Posted by Libor

Bump this up.

Barry, are you going to do some tests with tighter or zero split?

Also I think there is slight misconception when should peak pressure occur. IIRC at 45° ATDC, rotor has most mechanical leverage over e-shaft, but peak pressure for optimal efficiency should occur much earlier.

Otherwise best of luck with your testing

Libor and DOHC,
You know how the rotor moves at 3:1 ratio to that of the eccentric shaft. That seems to be the sweet spot for the rotary, that is, 15º times 3 or 45º. This latest run with the new sensor has gone to 1000 psi for the first time. But the highest pressures seem to be around 45º. I think I am seeing a slight deviation in this with rpm.

But I have exactly the same thoughts as you. Looking at the chart, if we could have the ignition pressure rise as a continuation of the initial compression curve it would seem to be logical.

Barry