idf 40's

fiat218 · Post by **fiat218** » Tue Jul 22, 2014 7:40 pm

i been tinkering with the dual carbs
synchronizing the air flow and the one set of carbs do not show that there is a suction of air/ what causes that

BEEK · Post by **BEEK** » Wed Jul 23, 2014 2:26 pm

a vacuum leak, is where i would start.

fiat218 · Post by **fiat218** » Wed Jul 23, 2014 11:16 pm

thanks beek, i will check all that

carl · Post by **carl** » Fri Jul 25, 2014 12:06 pm

Are you saying the cylinders fed by one of the carbs are not firing? Do you have the carbs synched or is one carb way ahead of the other. The pistons create suction whether they are firing or not so you should see some vacuum unless the throttle plates are totally closed. If the carbs are not synched they will still both work once off idle, I have had seriously unsynched IDFs that would make the car driveable but not idle.

fiat218 · Post by **fiat218** » Fri Jul 25, 2014 9:06 pm

carl wrote:Are you saying the cylinders fed by one of the carbs are not firing? Do you have the carbs synched or is one carb way ahead of the other. The pistons create suction whether they are firing or not so you should see some vacuum unless the throttle plates are totally closed. If the carbs are not synched they will still both work once off idle, I have had seriously unsynched IDFs that would make the car driveable but not idle.

i am saying there no indication of suction on the carbs that are on 3rd and forth cylinder,. according to the synch tool

idf 40's

idf 40's

Re: idf 40's

Re: idf 40's

Re: idf 40's

Re: idf 40's