Carb guru's step on in I screwed something up

1830 Views 16 Replies 6 Participants Last post by ccvair, Jul 26, 2012

Tubbed63

Discussion Starter · Jul 25, 2012

I just fully rebuilt a 3310-4 that came on the 34 coupe we bought. Car sat for 7 years so I figured tearing it down and rebuilding it completely was a good idea. After all I have rebuilt a few holleys and they all turned out great before. We got the car running before rebuilding the carb. It ran reasonable but I just had to rebuild the carb because surely after sitting 7 years it should need rebuilt right?

WRONG

I messed something up and cant figure out what it is. It is so rich it wont run unless I hold the pedal and it is shimmy and shaking. I jump out real quick to try and see fuel dribbling or something and the primary butterflies are wet but I don't see any fuel dripping so I open the blades and there is fuel pooling up in the performer intake. It was also smoking like a freight train (literally).

So here is what I did

Disassemble and clean everything spotless

Blew 120psi compressed air through every single passage including the air bleeds

Reassemble with all new gaskets, needle and seats, new 6.5pv, vacuum secondary diaphram, adjust transition slot to a square and set idle mixture screws at 1 1/4 turns out

Install and reconnect all vacuum lines then set the floats. I have double and triple checked the float level and it is spot on. I have pulled both needle and seats to check for dirt but they are clean.

Problem still persists and I am at a loss?

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MBZTECH

· #2 · Jul 25, 2012

Brake booster line connected? RICK

Tubbed63

Discussion Starter · #3 · Jul 25, 2012

MBZTECH said:
Brake booster line connected? RICK

Just ran out and double checked and all 3 vacuum lines are connected. Brake booster, ported vacuum to the dizzy and the modulator to the th400 trans.

The primary butterflies are soaking wet and the secondary's are dry so I assume the bulk of the fuel is coming from the primarys.

sbc1320

· #4 · Jul 25, 2012

Right gaskets double checked against the old ones?

MBZTECH

· #5 · Jul 25, 2012

Are sure you have the right carb kit. Recheck the part # number on the parts kit. Or I would take the bowls and metering blocks off and check the new gaskets against the old gaskets. Maybe the metering blocks got switched. RICK

Tubbed63

Discussion Starter · #6 · Jul 25, 2012

sbc1320 said:
Right gaskets double checked against the old ones?

I double checked the base gasket but not the rest because the old gaskets were not the non stick type and they got ripped up bad when I took it apart. I played H E double L getting all the old gaskets off.

Here are a couple pictures I just took. Dont know if they will help at all.

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3

71nova355

· #7 · Jul 25, 2012

Have you tried leaning out the choke deal (black part, says Holley) I see you have it set I'm the middle. Aren't they usually a click or two to the lean side? I'm just guessing

MBZTECH

· #8 · Jul 25, 2012

Sounds like a blocked air passage. Get some carb spay and reclean and blow all the pasages again. Or wrong metering block gaskets. RICK

sevenzeronova

· #9 · Jul 25, 2012

Did it back fire thou carb by chance?.3310-4 do not have PV blow out protection,Turn your mixture screws all the way in when it is running, does it die or smooth out?

Tubbed63

Discussion Starter · #10 · Jul 25, 2012

I just fixed the problem. New Slayer 750 is on the way :yes:

The older I get the less I feel like racking my head against the wall with these older out of wack carbs. We are putting this car together to be a reliable street cruiser so I thought about it and figured might as well start fresh with a good new carb and be done with it.

MBZTECH

· #11 · Jul 25, 2012

Here's another satisified SNS customer.RICK

Tubbed63

Discussion Starter · #12 · Jul 25, 2012

MBZTECH said:
Here's another satisified SNS customer.RICK

Want to buy a nice 3310?

MBZTECH

· #13 · Jul 25, 2012 (Edited)

Yes I will give you a buck two eighty. Beside the carb hows the rest of the 34 coming along? Post up some new pics if you have any. RICK

Tubbed63

Discussion Starter · #14 · Jul 25, 2012

MBZTECH said:
Yes I will give you a buck two eighty. Beside the carb hows the rest of the 34 coming along? Post up some new pics if you have any. RICK

Here is how it looks with the wheels and tires off my camaro. Money is tight after buying the car so its going to be a while before we get it to where we want it. For right now I want to get it running good and work out any mechanical kinks so it can be driven reliably.

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sbc1320

· #15 · Jul 25, 2012 (Edited)

Very nice looking. I have a new set of Welds -15"x4" for the front of my Nova and still need to buy back ones after a posi purchase though. :yes:

That Slayer is a Quickfuel carb right? I have their 850 Q series and it works fantastic. I just upped my squirters from a #33 to a #35 on mine.

Tubbed63

Discussion Starter · #16 · Jul 26, 2012

sbc1320 said:
Very nice looking. I have a new set of Welds -15"x4" for the front of my Nova and still need to buy back ones after a posi purchase though. :yes:

That Slayer is a Quickfuel carb right? I have their 850 Q series and it works fantastic. I just upped my squirters from a #33 to a #35 on mine.

Yeah the slayer is a quick fuel. Seems to be getting very good reviews from users so for $300 I went with it

ccvair

· #17 · Jul 26, 2012

the 3310 is a good carb FYI you can get a carb kit from autozone that works perfectly for under 25 bucks.I rebuilt mine with the kit and it works great. If your looking to unload the old carb send me a pm.

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