[Firebob]

Wow, this is all great information. Easy enough to add a couple degrees to the timing and adjust the idle accordingly once there. I might try open one of the vac ports somewhere and see how that effects things. Simple enough to put the cap back on if I'm not feeling it. I try not to mess with anything too involved while on a road trip away from home unless something breaks. So I'll probably leave it at that and maybe it will run just a little bit better than it would've. Changing the type of gas is interesting but I'm not sure stations around are that specific about what types they sell( maybe be I just never notice). I think the label says something like , may contain up to 10% ethanol, or something like that. I imagine that's what E10 is?

[Formulajones]

Originally Posted by Firebob

I try not to mess with anything too involved while on a road trip away from home unless something breaks.

This is why I mentioned what I've done with a couple of our cars on the AFR. I just let it run a tad rich up here, and at sea level it's just a pinch lean. A happy medium. I keep a heat range hotter plug in it most of the time, and I leave the timing at it's optimum setting for sea level pump gas.

Keep the hood shut and enjoy the car If it puffs a little black smoke up here at 5,000 feet when I nail the gas, I don't worry about it. Usually it's just the initial hit, then it clears out.

If I go to the track (which is near sea level for us) I make more effort to get the AFR spot on for best performance. But that doesn't occur all that often.