Re: Help...Holley problem / Gas out vents...
 

I did one more adjustment on this with both the front and rear and got the front float adjusted but once again I have fuel dumping out the rear sight hole adjusted either way. I am at the pointe with Vintage that the needle adjuster is in need of being removed and replaced with a new unit. Seems to idle well but runs a bit rich even with the idle needles adjusted. I am going to have my local carb shop take a look at it...:-) https://www.yenko.net/ubbthreads/imag...lins/beers.gif

Re: Help...Holley problem / Gas out vents...
 

Perhaps you are expecting to much out of it on the rear. Remamber the gas doesn't get into the motor till you rev the motor so that it is using the gas out of that end bowl.

The rears are more tricky to set. The gas will run out of the back bowl unless you rev it pretty hard on both barels and then let it set level and settle back down.

I was taught to get them to where nothing would splash out at Idle and then if you had it "just right" you could lean hard on the fender on the open side and it would splash out both holes f&B just a tad. Mine always ran well when set that way.

Good luck and give it one more try before you throw in the towel.

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Re: Help...Holley problem / Gas out vents...
 

As Pantera said, the rear float bowl may still be over-full of fuel from previously flooding. You can place a rag and a fuel-resistant container (an old spray paint cap works well) underneath one of the bottom rear float bowl screws and remove the screw to partially drain the bowl, then try to re-set the fuel level. If you do this, make sure the gasket under the screw doesn't tear when you remove it.

If you still can't get the fuel level to stay at the bottom of the sight plug hole, then it's either a bad needle & seat or a sticky float.

FWIW, the early 3310's were calibrated a bit fat from the factory, so that might account somewhat for the engine seeming rich. You won't know for sure until you get the back float to cooperate.

Welcome to the wonderful world of Holley carbs https://www.yenko.net/ubbthreads/imag...mlins/grin.gif

Some of `em cooperate and run perfect, while others can be a pain in the ( x ) to get right. Be patient and you'll get it sorted out.

HTH

Eric https://www.yenko.net/ubbthreads/imag...lins/beers.gif

Re: Help...Holley problem / Gas out vents...
 

Last ad to this...I also had installed a reproduction gas tank; got it from a very reputible business. Anyways, come to find out, there is a frequent condition to these new tanks: They arent always FULLY cleared of all the manufacturing debris that coincides with the assembly process. I would like to further add that it is in the best interestes of anyone who does any gas tank removal, replacement or what have you, to FULLY clean the tank out prior to installation. I had to drain this brand new tank, to find out that there was still debris in it, small shavings! A disaster waiting to happen. Luckily I stopped where I was at at the time to clear everythng out, then replace each fuel delivery item in order, gas tank forward... https://www.yenko.net/ubbthreads/imag...lins/beers.gif https://www.yenko.net/ubbthreads/imag...lins/beers.gif