Couple of questions on 4150. It is on a very high performance 440 (.040" over), ported, 915 heads, headers, MSD, cold air intake, Dominator intake manifold, headers.....so, close to 600 hp. All of this and a "bog" upon hitting WOT. I am running a 373 rear end.
First question....the carb has sight glasses for float level. I was told when I bought the car that the level needed to be at half way in the site window. I have read posts and watched numerous Holley YouTube and they all emphasize setting the level at the bottom of the glass (just wetting the threads on a plug). I picked up some literature on a Holley HP dbl pumper and it said that if you have glass, to set the level at halfway and if you have a plug, set it at bottom thread. Then, for the 4150 it only covers the level with a plug. I'm confused. I do know this, I have a had time setting the carb up if I use the bottom of the glass, and, I am running too rich at half way. Common sense would say that I set it at 1/3. What are the members opinion and experience?
Second question. If I set the auxiliary pumps so I have an accurate .015" at WOT, then I do not get shots right at the slight movement of the primary and secondary throttles. Should I cheat and set it for instant shot, or go with the book on the .015 at WOT?
OK, got a third......Where is the "square" transition slot? and when I find it, is it best to set it at Square? Where is that adjustment screw.
Finally, is there an opinion on cams and screw location? I am not worried about the hole shot, I just want mid range response. Thank you for any response(s).