fuel system for carb options

MrKwik · Aug 13, 2004

trying to figure out exactly how to do the fuel system on my 93 convertible 5.0 conversion. I am going to be using a holley "blue" pump and regulator and figured I would probably run 1/2" or 3/8" aluminum tubing from the pump to the regulator in the engine bay. My main issue is the pickup. I can really stomach spending $100 on a pickup tube so I would like to modify the stock one if possible. Has anybody done that and how did you do it. Pictures would be really cool if possible. I also dont know what to do about the line for the vapor canister. Should I leave it and make the canister functional or can I do away with it all together? I have heard that without it the tank will pressurize. Can I just get a vented cap to cure that problem or is it not that easy?

MrKwik · Aug 14, 2004

shameless bump

Stang951 · Aug 14, 2004

I left the line for the cannister filter to the front, sumped the stock tank and ran -6an braided line to the front from my Holley Blue.
You might run into a problem with the tank pick-up and an electric pump because it will have to work twice as hard to draw the fuel UP into the line and then push it through. Ideally you want the pickup lower than the pump, that is why I sumped my tank.

82boy · Aug 14, 2004

well i did what your doing once what i did was use the factory pick up and just ran a rubber line from it to the pump where i used a fitting i found in the hardware store.

on the alum line i would like to discourage you from using it. its hard to work extreamly hard to double wall flare.dangrous easly to leak. i recamend using aeroquip socketless line its a bit more than alum line but way cheaper than stainless 20 foot rool of 8 an is 50 bucks works real good presure rated to 400 psi cut line with dikes push on the ends and its good to go.

MrKwik · Aug 16, 2004

Stang951 said:
I left the line for the cannister filter to the front, sumped the stock tank and ran -6an braided line to the front from my Holley Blue.
You might run into a problem with the tank pick-up and an electric pump because it will have to work twice as hard to draw the fuel UP into the line and then push it through. Ideally you want the pickup lower than the pump, that is why I sumped my tank.

I thought about sumping the tank but I dont think I want to weld on the tank myself. Where can I take a tank to have that kind of work done and about what should I expect to spend?

04sleeper · Aug 16, 2004

I would just buy the $100 pickup already done. I know it sounds like a lot of money but the time you spend modifying your pickup to work and getting it in and hoping that it will hold up when in use........and if it has a problem later on and you end up dropping the tank again..........it will be all worth it. Trust me I've been there. Summit sells a nice Paxton unit that is already proven to work and you will thank yourself later.

samuraichamploo · Aug 16, 2004

dude no way, I did this easy as pie.
Just remove the EFI pump and run a rubber tube in its place, which should be all of 6 inches long.
viola! your done.
Why does everyone make this seem complicated? I did this on my car with no problems.

MrKwik · Aug 16, 2004

saltymaz said:
dude no way, I did this easy as pie.
Just remove the EFI pump and run a rubber tube in its place, which should be all of 6 inches long.
viola! your done.
Why does everyone make this seem complicated? I did this on my car with no problems.

so did you just reuse the stock lines or what? What about the vent line and canister? Did you make it go away or leave it?

Stang951 · Aug 16, 2004

I originally did mine that way too. Only difference was I used an aluminum tube where the pump was with rubber connectors at each end. The problem with that is the lines are way too small. They are great for high pressure, but not for volume, which is what you need for carbs.
If you are on a dirt budget and have to do what you can to get by (my case) until you can purchase all of the right components then go that route.

MrKwik · Aug 16, 2004

Stang951 said:
I originally did mine that way too. Only difference was I used an aluminum tube where the pump was with rubber connectors at each end. The problem with that is the lines are way too small. They are great for high pressure, but not for volume, which is what you need for carbs.
If you are on a dirt budget and have to do what you can to get by (my case) until you can purchase all of the right components then go that route.

lets just say that I have spent way more on this car already than I planned to spend on the whole project, so ya I would like to do it cheap. Not to the point that I woould have to do it again though.

I did a little more research and found where someone had used the pickup assembly from an earlier carbed car in the late model tank. I also see that there are different tanks listed for 79-83 and 83-93. Anybody know what the difference is between the two and if the pickups are interchangeable? I found a couple of pre 83 model in a local yard but cant find a post 83 carbed car. I was thinking maybe a different shape to accomodate duel exhaust or something? anybody verify this?

samuraichamploo · Aug 16, 2004

just reuse the stock pickup like I said.
the fuellines provides enough fuel for me, and I have a 351w and a holley 750cfm carb.

5.0 HOtrain · Aug 16, 2004

We did what saltymaz did on our old 86 with a carbed 460. It was a pig motor that didnt need a ton of fuel. I bought the $118 pickup and still had to modify My fuel system might be a tad overkill (aeromotive street rod pump, 10 and 100 micron aeromotive filters, -10 feed, -8 return, aeromotive bypass regulator, (2) -6 feed lines), but.........I know I have the fuel. Carbs require more volume than pressure, but as long as you can keep the bowls full you good to go.
mike.

408stroker5.0 · Aug 16, 2004

Spend a bit of money and buy the Mallory Pick Up. The stock pick up line's are just too small and will work on a fairly stock motor but wont be enough if your making some half decent power. I'm running the Mallory pick up with an Aermotive Street Rod Pump, -10 Supply & Return Line's, -8 line from regulator to carb, and a Mallory Regulator and it work's great. I had to modify the pick up so I could run the -10 return line but otherwise it fit great. Another problem with running the factory EFI fuel line's is the return line is not big enough for a carbed engine which will result in too much fuel pressure. Even with a regulator you wont be able to get the pressure down to an operational psi. The problem with this is the needle and seat wont be able to handle the pressure and you'll hydro-loc the engine. Hey SALTYMAZ... Did You check your Fuel Pressure?
Oh Yeah.... Those Holley Pump's are VERY loud.... be prepared to be slightly annoyed.

Shon

pisgahhiker · Aug 17, 2004

Oh Yeah.... Those Holley Pump's are VERY loud.... be prepared to be slightly annoyed.

Yeah mine sounds like a microwave

samuraichamploo · Aug 17, 2004

half decent power?
I think around 400 at the wheels which im making constitues decent power, and I am using stock lines and pickup.

combo in sig.

408stroker5.0 · Aug 17, 2004

Not to be an ass or anything Saltymaz but I was looking at your pics in your garage and from what I can see those dont look like Trick Flow heads.... Do you actually have Trick Flow Head's on that 351? Your Carb is on backward's as well.

pisgahhiker · Aug 17, 2004

is this working for you?

Mine was in almost the same location and was having trouble keeping the PSI up. (sucking line dry)
Those holley pumps will last alot longer in a cooler location IMHO

I'm still running stock line but moved the pump to the rear.

5.0 HOtrain · Aug 17, 2004

saltymaz said:
half decent power?
I think around 400 at the wheels

I'd guess more like 325, and thats generous with stock 302 headers , yeah whats up with the carb?

samuraichamploo · Aug 17, 2004

its not bolted down, its just sitting there.
And yes there TFTW heads, It has TF part #'s on it.

408stroker5.0 · Aug 17, 2004

I Dont Think So..... From what I can see in that pic in your "My Garage" those are cast head's... I can see the casting ridge right on the front of the head.... Those are not Aluminum Heads. You say it's a crate engine as well.... look's more like it came out of a farm truck man.... it's pretty filthy.

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