This comment doesn't help Jim but. The Mig 15 and the F-94C had the same British engine design. The F-94C had an afterburner and the Mig had water/alcohol injection to augment power. I think the F-80, T-33 and F-94A, B, and C were the only Centrifigal compressors in US Air Force planes. Starting with the F-84 on were all axial compressors.

I am building a F-94C from scratch and hope to test fly this fall.

I personally have been plagued by a few problems caused by our high density altitude. The RAM 500 is very difficult to get it to acelerate rapidly at our alititude and my personal engine has yet to be flown here. It works OK in Dallas, TX. The WREN 54's and WREN Super Sport seem to be able to handle the altitude with ECU ajustments.