Engine Run - Irvine 15R Turbo 

This Irvine 15R Turbo started off as an RC car engine, which I got for $33USD on eBay. It was in great condition, perhaps only run once or twice, if that. A few hours later, it's set up for Goodyear racing with a venturi, Rossi Pylon NVA, crankcase pressure tap and a more civilized head size.
It probably still needs some loosening up and a bit of attention to head clearance, but it shows some promise for Slow GY with a smaller venturi. Open GY will need lots of nitro and perhaps a tuned pipe as for an F2A Speed trainer.