[priobe]

1. Was the a new set of weber..IE manufacturered in 2005?
No this is an older Italian system that I purchased used Everything was tight

2. The only way I found you can accurately tune webers is to put the car on a dyno for a day and just keep tweaking....when you dyno tune it you can plainly see what idles, mains and air correctors you need.
My setup basic 427 setup should be 37MM Chokes, 120 Idle Holders, 55 F-10 Idles, 160 Mains and 210 Air correctors with a .55 bypass in the float bowl.
4. What pressure are you trying to run the webers at? I ran mine at less than 3lbs usually around 2-3...I set mine when the car was warm and then just forgot about it...if I had fuel I was good.
My pressure is 3 PSI when it is cold then I readjust it when it fades

5. ARE YOU RUNNING SOME TYPE OF FILTER ON THE CARB!?!
bad bad bad...I could absolutely NEVER get mine tuned if I had any type of filter on the carb...theres a really good air flow analysis over on the GT40s.com website that shows how much these things like air and how anykind of disruption changes the complete characteristics.
Open no filters at all

Thanks Aggie for chiming in.

ENTDOC,

I verified my exhaust and it is sealed.

Thank you for suggestions


Dwblain,

I hope this thread help you also, and we all get a benefit from this thread. I know I will