Scoutboy74
Moderator
Better to be lucky than good, I always say. Sorry for the delay. I just started a new job today, so my temporary life of leisure has ended. That's a good thing though.
It won't hurt anything except for maybe your mileage to drive it with the choke partially closed for awhile. If the morning start up is cold where you live, your going to want that choke to snap shut all the way on your initial warm up before you "haywire hank" it into place. Kind of a hassle, I know.
I don't think this is a jet size issue. It probably has the same jets in it that it rolled off the line with. They got the job done back then. The craptacular corn squeezins alky gazz that we're forced to burn these days does tend to burn a bit lean. The jets might be a size too small for optimum a/f ratio, but shouldn't be so far off to be causing the severity of issue that you've had. I'm leaning more towards an incorrect or damaged gasket somewhere that's either capping a hole that needs to be open, or the reverse. Or it could be that some internal orifice is plugged up. It doesn't take much of a blockage to cause problems with these mixers.
If the carb shop is willing to take another stab at getting it right at no additional cost to you, I say absolutely have them go over it again when its convenient for you. I don't know if they have any way to hook it up to a test mule and put it through its paces before they bless it as healed, but that would be extra handy if they could.
What's the mean elevation where you play? If you're up pretty high, (6 to 10k) it would be super easy to over jet to the point of belching black smoke, fouling plugs and making your eyes burn from the Rich exhaust smell. You don't want to go to that extreme. So if any jet change is made it should be very subtle. No more than one or two sizes above whats in it now. And make sure you get the removed jets back to have as keepsakes.
Gradual changes followed by testing is better that drastic measures. I still feel like they need to scratch and sniff a little deeper than jets. Something else is wrong.
As for your future plans, don't quote me because I'm not all that lerned up in efi, but you might not need a 4bbl intake as a base for a suitable setup. Your present 2bbl might be fine. That would be a question for bill hamilton in the injection tech section. Navy bill can get you on the right path when the time comes.
I'm glad we were able to make some headway with this headache to the point that you can drive the sumbitch without advancing the timing elevendybillion degrees. I knew that wasn't going to be the right recipe.
It won't hurt anything except for maybe your mileage to drive it with the choke partially closed for awhile. If the morning start up is cold where you live, your going to want that choke to snap shut all the way on your initial warm up before you "haywire hank" it into place. Kind of a hassle, I know.
I don't think this is a jet size issue. It probably has the same jets in it that it rolled off the line with. They got the job done back then. The craptacular corn squeezins alky gazz that we're forced to burn these days does tend to burn a bit lean. The jets might be a size too small for optimum a/f ratio, but shouldn't be so far off to be causing the severity of issue that you've had. I'm leaning more towards an incorrect or damaged gasket somewhere that's either capping a hole that needs to be open, or the reverse. Or it could be that some internal orifice is plugged up. It doesn't take much of a blockage to cause problems with these mixers.
If the carb shop is willing to take another stab at getting it right at no additional cost to you, I say absolutely have them go over it again when its convenient for you. I don't know if they have any way to hook it up to a test mule and put it through its paces before they bless it as healed, but that would be extra handy if they could.
What's the mean elevation where you play? If you're up pretty high, (6 to 10k) it would be super easy to over jet to the point of belching black smoke, fouling plugs and making your eyes burn from the Rich exhaust smell. You don't want to go to that extreme. So if any jet change is made it should be very subtle. No more than one or two sizes above whats in it now. And make sure you get the removed jets back to have as keepsakes.
Gradual changes followed by testing is better that drastic measures. I still feel like they need to scratch and sniff a little deeper than jets. Something else is wrong.
As for your future plans, don't quote me because I'm not all that lerned up in efi, but you might not need a 4bbl intake as a base for a suitable setup. Your present 2bbl might be fine. That would be a question for bill hamilton in the injection tech section. Navy bill can get you on the right path when the time comes.
I'm glad we were able to make some headway with this headache to the point that you can drive the sumbitch without advancing the timing elevendybillion degrees. I knew that wasn't going to be the right recipe.