[.041 Safety Wire]

Allison eventially solved the detonation problems in their original designs and the powerplants became much more reliable. In the case of their latter model they probably would have eventually overcame its problems with something other than antidetonation injection. Probably the E and F series did not pull excessive manifold pressure and had fairly precise wastegate control with regard to the turbosupercharged versions. I think all these companies eventually started seeing the handwriting on the wall and started putting their research into jets rather than trying to get more horsepower out of the recips. It is definitely possible to pull more hp from the RR and allison engines as evidenced by what they do with the racers at Reno but the reliability always suffers.