dist. has very little input on mpg when curve and timing is correct for build. vacuum advance dist. get better mpg than non v/aWhat kind should I run ? I'm building a 331 and mostly a daily driver . I want good performance but also don't want to stop at every gas station I pass to fill up. Any input would be great.
That is popular for drag-only or endurance engines running high rpm. It sux for lost torque at lower rpms and part-throttle, but drag and endurance racers don't care about that as they only need it to run well above those rpms, and they use higher-octane fuel to avoid detonation. It can cause transitional detonation in pump gas street engines. If you watch a locked-out pump gas car, you'll usually see a puff of blue smoke on acceleration - that's a sign of det and lost power even if you can't hear it.What about running a mechanical and locking it out ? I heard that was the way to go ? Any comments on doing that ?