Maybe you can help me here i have a holly that i have had for a year now and i pulled it off the motor for 3 months maybe while rebiulding it threw it back on and it seemed to be fine just needed a little tuning... well if the car sits for 2 days or so it gets flooded out some how... its a 650cfm holly vacume secondary i think i have everything adjusted right but maybe you can help...

 

How do you know it's flooded? It's not uncommon to have to crank the motor over quite a bit after letting it sit for several days- the fuel all drains back through the lines and it takes time for the pump to recover and push it up to the carb. Made worse if you don't have a functional choke. This is a fuel starvation issue, obviously- the opposite of a flood condition.

 

no i know its flooding because
#1 the plugs are dripping when i pull them out
#2 its not starving i have a electric fuel pump
#3 i also have a electric choke

this carb worked great last year and the car runs great with it. its just when i let it sit the gas some how is going into the cylinders and yes its gas!
and my plugs arnt just wet there dripping wet
so could a get some help here????

 

when the car sits the gas is siphoning through and going down the ventury.thus flooding the engine.the gas tank is building up pressure and pushing the gas to the engine.try leaving the gas cap off.and see if this solves it.if it doesn't then the carburetor is the culprit.good luck.let us know

 

Recheck your fuel bowl level. My Rustang did that once (I could shut it off and fuel would literally pour into the carb) adjusted the float level, and problem went away.

hth

 

ok ajusting the float bowls i did this once. i adjusted it so the fuel level was right at the bottem on that see hole on front and back... bad or good? give me some input

as for the gas cap thing my tank is vented thus i cant see that helping... thanx tho

 

i wouldn't go any lower on the floats.one thing comes to my mind is maybe the exhaust crossflow under the carb is getting the carb too hot thus boiling the fuel out of the carb into the engine.run the engine until it's fully warmed up.shut it off and look down the throat of the carb to see if fuel is going into the engine.good luck

 

ok i understand what your saying but i have a rpm air gap intake... that should elemenate any chance of that wouldnt ya think?.. it onley does it when it sits for 2 days or more.. im very tempted to put a 750 edelbrock on there. im just so sick of fighting this holly. but when it does work it works great...
would a 750cfm carb be asking for problems on a mildly biult 350?
i need input...

 

i know what you mean.holleys can be tempermental.i have to believe you'll be o.k.with 750cfm.good luck.

 

Tom,
The accelerator pump in the carb (the little diaphram) could be cracked, and this could cause gas to leak in. And I'd go with 700 before I would 750. If you're running a high lift/ high duration cam, it would be allright to run a 750.

 

well i would do a 700 if edlebrock made it but they dont they make 600, 750, 795, 800