As long as it doesn't start detonating, will low compression (8.5-8.9:1) take as much timing as you can give it? Is there a point that it won't make any more power even with more timing but it still isn't to the point of detonation?
It all depends on the load. If the vehicle is light, and you are cruising on a dead flat road with a tail wind you could probably run 65 total. A bit of load and out come the bones.
