Stalls out at 4400 RPM, Stumped! Options

[Mblizzard]

Well I am a bit confused on this one. 2056 dual Webers. Electronic ignition. New SVDA dizzy. Rev limiting rotor.

Pulled the tank to install SS lines and had a few problems with crimping the lines when putting the tank back but I think I have that worked out. Compression good at 130 plus on all. Timing set at 30 BTDC.

Car runs strong up to exactly 4400 rpm and then it sounds like it hits a wall. Can run it long and hard at rpms below so I am not thinking it is fuel limited. Swapped out the rev limiting rotor with standard one but same thing happens.

I am going to pull the tank again to be sure on the lines. Any other thoughts?

[ThePaintedMan]

Mike,
After you have gone back through the basics, consider this. Kevin taught me to have a good quality fuel pressure gauge inline with the carbs to help this very scenario. You can order a Summit Racing/Jegs one for just a few bucks. Plumb it in line with the carb inlet line. Then you'll be able to see if you're getting adequate fuel at idle at least. You can take it one step further with a GoPro or phone camera and videotape the gauge as you make a couple of runs up to 4400. This will at least tell us whether fuel is the culprit, or as Rich and Jake and others have suggested, air/spark.