Timing Dance ! Vacume Advance ?

pilotsf said
Wow . Very good info. So i have had the vacuum capped since day one. Plugs look good, I just changed them with champion (65 heat) and 8mm accel wires to be safe. It is a street car but I race in napa once a month. It is a mp distributor. So install one spring and hook up the vacuum ? I do get ping up hill sometimes. I also think my carb has a partial throttle flat spot. Thanks very much.

If your already getting ping uphill hooking up the vacuum advance will probably only make it worse and destroy your engine so I don't suggest it now. Although if the carb is real lean that can make it ping. I never noticed you saying it is the MP dist. Like T67 said they already have the quick advance so you don't need to mess with the springs.

pilotsf said
One more question . there is a pretty good speed shop here in town and they tune crab/dist dyno for about 350$. would that be a safe and solid way to go? my builder is all race and made my motor for that. But i do drive it daily . a 13 sec daily driver. Thanks again ps 800 cfm to big for 360 ?

It's JMO but that'd be the best $350 you'll spend if you know for sure the dyno operator knows what he's doing. I don't think a 800 Eddy is too big. You don't want to go any bigger though. Is that the Thunder series? If so that's a real good carb. Sounds like it's just running lean by your description. If you get the mixture en-richened to where it should be the ping might go away. Try to get that pinging stopped ASAP cause you can beat the pistons and bearings out of an engine in no time if it's spark knocking. I've seen it happen in 150 miles.