I am in the process of putting tri power on a 350 chevy. i have 3 rochester 2GC small base carbs. The center carb has had no changes from its orginal runnig state other that a rebuild and the addition of a side mounted choke. The 2 end carbs have had the idle mixture screws plugged as well as the holes on top of the base. (belived to have whole idle circuit plugged). The rear vacumn ports on the base have been plugged as well as the venturi vacumn that it tradtionally used for the distrubter. They have been rebuilt as well with no chenges to the jets or acclerater pump. i have a new elebrock intake.
The center carb was put on the motor and driven on for a few miles to ensure there was no problems with it before it went on the tri power manifold. When i put the carbs on the new manifold the front and rear carbs were blocked off with gasket paper. the car strated and ran great. no problems. i only have fuel runing to the center carb. i pulled off the front carb and removed the gasket paper and put it back on. i started it up and it ran a little rougher than before but the car still idled. When i went to give it gas it was very hesitant and slow. then i removed the gasket paper from the rear carb and put it back on. when i started the car it ran really rough, barley even running.
then i taped up the top of the front annd rear carb to try to prevent vacum leak. when i closed the choke on the center carb the car runns a little better but still not great and it is still hesitant when i give it gas. i turned the idle screws out all the way on the center carb to give it more gas and that also smothed the car out some but not great.
What is wrong or were could the vacum leak come from? Are there more idle circuit holes that i need to plug? do i need those new thicker buterflies to seal the base of the carb better? does there need to be fuel run to the front and rear carbs? i have been as descriptive as i can if there is any more info you need to help please ask. i am lost and dont know how to stop the vacumn leak. If you would like to call collect or email me your phone number so i can call you that would be fine as well. 330 653-3563 usalley after 3PM ask for Jeff. alternate e mail is email@example.com