Wartime reports. E-236. Knock-limited performance tests of 2, 2, 3, 4-tetramethylpentane, 2, 3, 3, 4-tetrnmethylpentane, 3, 4, 4-trimethyl-2-pentene, and 2, 3. 4-trimethyl-2-pentene in small-scale and full-scale cylinders [with list of references]; by Edmund R. Jonash, Carl L. Meyer, and J. Robert Branstetter.