Problem 388. Joe Driver has a 71 VW Type 2 with a new 1776 engine. The engine has w/Engle 100 cams, and is probably pretty mild all around since the previous owner was an old hippie lady. Is there general recommendation about what octane rating he should use? Other than, start with the cheap stuff and if it pings, move up. Assume that Joe has no engine analysis equipment.
Sidebar problem for extra credit: how audible is pinging in a bus?