Technical 3 deuces on SBC running out of gas??

Let me start by saying I have read more threads here and everywhere else on running an SBC with 3 94's, probably way to much for my "simple" issue:

engine: 327 L79 clone. 11:1, Crower Street beast hydraulic cam (L79 specs), camel humps with 2.02's,
Old School Accel dual point. Offenhauser manifold, rebuilt 94 style 2100 carbs, progressive linkage.(about 60/40), red Holley electric pump regulated at 3.5#'s at the carbs. ( all used parts )
Rebuilt TH400 2300 stall.

a minute or 2 after I hit 3rd gear it just sputters like its running out of gas ?? I try to feather it but it finally just dies. Pull over, turn it off, turn it on and it fires right up. if I light foot it home is does the same thing.

My gut tells me the red pump is shutting off. Could I be running out of gas on the center carb?

old and confused

 

Are running electric or mechanical fuel pump?

Art

 

Holley red electric with no relay.

 

I'd run a temp fuel pressure gauge where I could see it, wire tie to a wiper etc. Then go drive it and watch to see what happens.

Also are you pulling any rpms when doing this? As in are you running up to say 5200 rpm and letting it shift then 5200 again when it starts acting up ? Or are you just taking off from say a stoplight or corner under "normal" acceleration?

...

 

Just normal acceleration. It revs like a mutha in park in the shop! gauge is a good idea thx

 

Where is it located? I had the same issue with a Snipper pump. They do not suck very well. The pump needs to be located so gravity feeds fuel to the pump to work properly.

 

Next time it dies pull the wire to the fuel pump so it’s not pumping and see if it’ll start. If there’s fuel in the float chamber it will, if not it won’t.

 

its on the frame rail between ( and below) the fuel tank and engine.

 

good idea....thx Tim

 

Dump the electric pump and go with the stock manual pump. You will never regret that move. I had to do the same thing on my coupe. Ended my problems …I was using Stromberg 48’s

 

I can't, frame is in the way.......

 

that is what grinders are made for.

 

trust me, I started that way... Using and old school Hurst style from mount it just did not fly.

 

Is the gas tank vented or do you have a vented gas cap?

 

vented cap - already went through that too........... jumped out and opened that cap when it stalled...........no air

 

As said above, electric pumps push gas they do not suck it. If your take pickup is on top the tank it makes it hard to provide a gravity feed to the pump. Installing a tank outlet lower on the tank is an option.

Your pump is half down the frame rail, it needs to be close to and under the tank. I prefer them in the tank as that is where they are most efficient (pushing always), coolest and quietest. And quite frankly I don't like looking at them so another point for in the tank.

 

Well. My exit on the tank is on the low end of the tank but I understand what you’re saying. I will review location options.

 

Plugged filter...?

 

Mount a fuel pressure gauge where you can see it while driving ,that should tell the story .

 

Brand new, but I got the pump second hand and was told there is one inside?

 

That’s the plan

 

I see you are running a fuel pressure gauge, the same one I run. This is probably the least dependable part on your whole car. I don't know what you have it set at or what the psi of the Holly is, but normally 97s like about 1.5-2 lbs. We just set up a flathead with a 6:53 blower and it ran out of gas at that psi. We installed a 4psi K&N pump and it worked perfectly. Just a thought, but you you say it revs high and you have a lot of fuel log, maybe you are draining the bowl. If you find the problem, keep us in the loop.
Warren

 

Holleys seem to like 2&1/2 to 3 lbs pressure.
Then there are things such as correct fuel float setting and sticking inlet valves which may also affect the original posters conditions, (although I am sure that he has checked that).

That is one really nice looking automobile though !
Neat colour scheme too.
Got more photos some where ? - thanks.

 

I think you're under carbureted for that engine combo, and the progressive linkage probably isn't helping. Could be sucking the bowl dry under load. That's just my opinion which probably ain't worth one red cent

 

I ended up installing a small K&N fuel pump. It was recommended by them and they assure me it would suck fuel out of the tank. It's doing a great job.
Art

 

An original Stromberg 97 has 167 CFM X 3 = a grand total of 501 CFM.

Back in the 70's I had a 57 Panel truck with a 327 with an engle cam, Jahns 12.5 pistons, 202 heads and an early Corvette dual 4 setup. When I got it it would cruise along at well over the speed limit without a whimper but fog down on it and run though the gears and it ran out of gas before it ran out of gear. some searching found that who ever put it together used a natural gas fitting in the fuel line with a small orifice that restricted gas something crazy. I'd also be looking for any sort of restriction in the line from tank to carbs.

 

Thx Warren I appreciate the input. I sure will

 

Thx Clem. The input here has been fantastic. I have a lot to go thru now. My IG site has a ton of photos, you will be really surprised at what it looked like before . old_soul_rich. On IG

 

All opinions are information to me, so thanks.

 

Thx Art. I will look into them