allright mister mayben. I have held my tongue for over 4 weeks now.
I am referring to the photo in post #19 where the accelerator "s" link is installed backwards.
Was this a test?? If so, what did I win?
Well you obviously know these carbs well!
But in the case of the pic you refer to, there are actually several things that are not "correct" about other assembly points on that particular tq setup. The "s" link is one of those.
In actuality, the position of that link ends up not being important on a well-used carb that has all the link holes as well as the pivot lever wallowed out. Typical of all the cores I see. That means that all rods, links, etc. I end up fudging to make it work properly, that is why I constantly recommend not going by the "specs" found in the aftermarket kit carb sheets. I make all the necessary bends and tweeks in the various link while the carb is in operation. And that is what we did when these things were new on vehicles in warranty no make the sumbitches perform no matter what the "smog" setup called for! Otherwise, the customer was constantly in the shop complaining about the pos new car/truck they just took delivery of and it's non-drivabilty as compared to their trade-in which was not a smog car/truck.
That particular tq was done for a "second chance" for the owner who has participated in this thread. He'd already been bent over with the first one by two other shops and even though I had fixed it to perform finally after correcting all the butcher, the repair I made to the first fuel bowl did not work successfully as we have already alluded to. And that carb which he paid dearly for, had all connecting rods butchered, including an accel pump lever that was mangled beyond use to try and make it work. When I tried to manipulate it back into the correct shape, it broke.
Positioning the "s" link in some spec'd manner does have a "staging" effect on these carbs when used in lightweight vehicles with an automatic trans, but in the case of the IH stuff it makes no difference in performance/operation at all since these motors/platforms require a much healthier pump shot. If we could source new links, levers, hardware, etc. For these mixers we would go by the book, otherwise we just make 'em work. In fact, I've now started "flattening" the "s" link on the rebuilds I do to negate that so-called two stage effect.
The carb in that pic had all the various linkages, etc. Scruued with for hours while installed on the test motor. Some of the mods I did to that stuff made an improvement, some did not. My purpose was to verify what works since I had the opportunity with this carb and was not pressured to get it shipped. That pic was taken just as soon as it went on the adapter for reference, that is not how it went out the door! Though once I proved to myself that the pump shot was better with the link as you see it in the pic, I did not change it back to "spec".
