Hot Rods flathead idle on a two carb set up?

how do you properly set idle on a two carb set up like this?

 

Info..Is it that you can't get the idle down.
Duane.

 

have you set them up (sync) to work together? if not search for a thread by Tommy. it is really simple. then worry about idle..

 

yeah, the idle is too fast

btw, did a search, didn't find. any links?

 

zgears your avatar is awesome..you having a laugh!

 

Disconnect the connection between the two. Close the throttle valves by hand, does it slow down, back out the throttle stops on the carbs to see if the thottle valves are closed all the way.

then open one throttle with the screw until it speeds up a little, back it off one half turn, open the other one until the idle speed up, back it off one half turn.

Now connect the carbs together and start it . Too fast, shorten the connection until it slows down again. they should now be ok.

Might work, might not. used to work!

Traderjack

 

Just to see what happens, close the air/fuel mixing screws on one 97...The other 97s mixture screws should be a 1 1/2 turns out. Adjust from there.. Could be that your throttle plates on the none idle 97 aren't closing. To much air leaking around the throttle shafts. Not built correct..
Duane.

 

Plates and shafts are a big issue you need to address first.
If shats are sloppy, you are doomed...no way is it going to be steady, low, or consistent, as you need to be able to meter and feed extremely small amounts of air per barrel. No big, though, as Strombergs have replaceable bushings and shaft and bushings are available.
Next, hold up both bases to a good light with idle speed backe out and plates closed. You need to kill off any light getting through around edges...back off plate screws a tiny amount, which ytou can usually do without ruining the staking, and tap, shake, and poke at throttles till you get all gaps as close to zero as possible.
Then you can****emble and adjust.
Setting is done linkage off; set everything to just barely moved open by idle screws, then just keep adjusting speed...mix...mix going back and forth til you get a low enough stable idle. Each turn of a screw may require turning all the others...do it with aircleaners off on the****umption that most hotrod aircleaners are actuallychokes. If idle changes when you put them back on later, be warned.

 

As the others say, if idle is too fast chances are a vacuum leak, lots of places to look for that gremlin. Basically from the top of the carb to where the intake bolts to the motor. so
Carb its self as mentioned above.
Carb to intake
Intake to Block.

another simple one would be that when you put the linkage on that you didn't make sure that both carbs*****erflys were closed? Not saying you did, but I have had it happen and you get a fast idle and then chase your tail trying to find the vacuum leak only to start again.

all in all it usually ends up being an easy fix, its just finding it.