carter 4 barrel

[txfireman]

the back butterflies on my 4 barrel arent opening when i lay the hammer down. any help on what the problem is and how to fix it , or a good replacement.

80 blazer with 350, 33x12.50s, dont know the rest yet, just got it.

 

[Sparky87k5]

How do you know this? What is your "testing" method. Sitting still, moving under power, in what gear? Could be a linkage problem, air movement thru carb or something stuck. Your question doesn't give much info as to what is happening "when I lay the hammer down".

87 K5, 427/340hp BBC,4.56 D60 & 14BFF, NV4500, NP208, TSM rear disc's,

 

[tRustyK5]

Also what model and size is the carb? My 1406 (carter clone) has vac secondaries and their opening point can be tuned with lighter or heavier springs.

Rene

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