1st Generation Specific (1979-1985) 1979-1985 Discussion including performance modifications and technical support sections

So what all do you need to run a Dellorto?

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Old Apr 24, 2006 | 10:29 PM
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So what all do you need to run a Dellorto?

I bought a Dellorto with manifold from Ebay. Other than the obvious linkage, what all do you need? Upgraded fuel pump, anything like that? I'm thinking I will do the DLIFDAS along with the carb, so what else do I need?
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Old Apr 24, 2006 | 10:43 PM
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With any higher flowing carb, its definately recommended to upgrade the fuel pump, and of course the regulator with it. You also need a solution to the OMP rod and lines, either a modified one to attach to the linkage if it doesnt come with one, or to block it off entirely and pre-mix. Not too familiar with the dellorto setups, so not sure if they come with a place to attach the oil lines to.
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Old Apr 24, 2006 | 10:59 PM
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nice, how much did ya score the Dellorto for? i may be swapping carb setups soon and thats a option.

as stated above get a better pump, holley red and regulator should flow fine for that. is it for a 12a or 13b? either way the holley or carter setup should be enough.
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Old Apr 24, 2006 | 11:10 PM
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It is a MUST to upgrade the fuel pump and add in a pressure regulator. The stock pump is very weak in comparison, which is evident in that they fail to flow enough at the first sign of a clogged filter. I would suggest a holley Red pump with an adjustable holley pressure regulator, or get the blue pump that comes with a regulator. I've NEVER heard anything bad about a holley fuel pump or regulator.
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Old Apr 24, 2006 | 11:51 PM
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Racing beat came up with 2 styles of dellorto. no OMP and OMP on the body.
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Old Apr 25, 2006 | 12:24 AM
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On my dell I run a carter fuel pump with a holley FPR dial'd down to roughly 2.25-2.5.

On the omp/mop linkage My rod fit great, and one of my omp/mop lines made it, but I had to cut into the other one to make it long enough.

Oh and a fuel filter right before the FPR. like one of those glass one's or something of that nature.
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Old Apr 25, 2006 | 12:25 AM
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Was this the one for $425? I was considering purchasing it, but spent the money instead on tires and brakes the car needs to be safe as the holley on it now will suffice.
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Old Apr 25, 2006 | 07:49 AM
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Originally Posted by mr_ouija
Was this the one for $425? I was considering purchasing it, but spent the money instead on tires and brakes the car needs to be safe as the holley on it now will suffice.
Nope, it was this one:

http://cgi.ebay.com/ebaymotors/ws/eB...MEWN%3AIT&rd=1

Those of you with Dellortos, can you guys post some pics or email them to me (the more the better) at boostedfc@hotmail.com?
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Old Apr 25, 2006 | 07:55 AM
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Good choice choosing a Dellorto! I had mine on an SP 12a and she ran like a dream. Now I have a Weber but a may have to put my Dellorto back on! Nothing much is needed as far as re-jetting especially if its a RB Dellorto. I personally would trade, sell or store the 2 peice intake and get the "longer" one peice intake. It runs MUCH smoother overall. I premix just as a safety precaution but my Dell does have the OMP inlets but I capped them off. Good luck and enjoy your new DELL.

I know many will disagree but this is one of the finest carbs ever made.
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Old Apr 25, 2006 | 08:00 AM
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Originally Posted by 85rotarypower
It is a MUST to upgrade the fuel pump and add in a pressure regulator. The stock pump is very weak in comparison, which is evident in that they fail to flow enough at the first sign of a clogged filter. I would suggest a holley Red pump with an adjustable holley pressure regulator, or get the blue pump that comes with a regulator. I've NEVER heard anything bad about a holley fuel pump or regulator.
Now, I'm also going to be running a turbo. Will this pump be able to handle that?
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Old Apr 25, 2006 | 08:08 AM
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Originally Posted by Latin270
Good choice choosing a Dellorto! I had mine on an SP 12a and she ran like a dream. Now I have a Weber but a may have to put my Dellorto back on! Nothing much is needed as far as re-jetting especially if its a RB Dellorto. I personally would trade, sell or store the 2 peice intake and get the "longer" one peice intake. It runs MUCH smoother overall. I premix just as a safety precaution but my Dell does have the OMP inlets but I capped them off. Good luck and enjoy your new DELL.

I know many will disagree but this is one of the finest carbs ever made.
Yeah, I was thinking of getting the one piece manifold for my 12A, just until I get my 13B rebuilt and ported. I'm hoping mine has the OMP inlets, because I really don't want to be bothered with pre-mixing.
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Old Apr 25, 2006 | 08:11 AM
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You can tap the intake for NPT barbed fittings for the mop if the intake doesn't have them. If you are going turbo, you need an FI pump and an fpr like the Mallory 4309.
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Old Apr 25, 2006 | 09:02 AM
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Originally Posted by trochoid
You can tap the intake for NPT barbed fittings for the mop if the intake doesn't have them. If you are going turbo, you need an FI pump and an fpr like the Mallory 4309.
Wouldn't I need to run all new fuel lines if I'm using an FI pump?
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Old Apr 25, 2006 | 05:08 PM
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Originally Posted by $100T2
Wouldn't I need to run all new fuel lines if I'm using an FI pump?

yes


do you have the whole Racing Beat filter set up for this carb? i didnt see it in the pics on the auction. i have the kit minus the plate that is attahced to the carb. i see the plate i need attached to your carb. if youre willing to part with it, im very interested in it. also, i have this same carb for my ported 13b. its not running yet, but i have high hopes. also, i may be mistaken but i think i see fittings for your OMP lines in the ebay pics
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Old Apr 25, 2006 | 05:17 PM
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Im also running dellortos on my 4 port 13b Im using to facet pumps & a holey fuel regulator worked fine on my previous FB now im gonna polish them again cause they have been sitting around & will prob use my facet pumps had a Carter but i was in such a rush i placed it too low & ripped it right off of the underbody foolish for being in a rush but the facet works pretty well i have 2 of them on it.
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Old Apr 25, 2006 | 05:18 PM
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Depending on the size of the pump's output, the return line may need to be increased. I was going to install a set of SE lines on mine in preperation for a future FI turbo setup, until I discovered that the pump I bought required a 3/8" minimum return line. Pump was overkill.

You will need to replace all of the post pump soft fuel lines with FI rated hose. Replace all of the hose clamps too. Spend the money and buy the solid clamps, not the worm gear ones.

If any of the existing steel lines look questionable due to rust, replace them. It took me a week to trace down a fuel delivery problem that turned out to be a sub-pinhole sized leak on the hardline between the tank and the pump. since that line is on the draw side of the pump, it sucked air instead of squirting fuel.
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Old Apr 25, 2006 | 05:25 PM
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Originally Posted by trochoid
Depending on the size of the pump's output, the return line may need to be increased. I was going to install a set of SE lines on mine in preperation for a future FI turbo setup, until I discovered that the pump I bought required a 3/8" minimum return line. Pump was overkill.

You will need to replace all of the post pump soft fuel lines with FI rated hose. Replace all of the hose clamps too. Spend the money and buy the solid clamps, not the worm gear ones.

If any of the existing steel lines look questionable due to rust, replace them. It took me a week to trace down a fuel delivery problem that turned out to be a sub-pinhole sized leak on the hardline between the tank and the pump. since that line is on the draw side of the pump, it sucked air instead of squirting fuel.
Man, I just replaced all my soft fuel lines. Now I get to do it again, I guess... Unless the hose I bought is FI rated. What are solid clamps?
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Old Apr 25, 2006 | 05:26 PM
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Originally Posted by aws140
yes


do you have the whole Racing Beat filter set up for this carb? i didnt see it in the pics on the auction. i have the kit minus the plate that is attahced to the carb. i see the plate i need attached to your carb. if youre willing to part with it, im very interested in it. also, i have this same carb for my ported 13b. its not running yet, but i have high hopes. also, i may be mistaken but i think i see fittings for your OMP lines in the ebay pics
I don't think the filter is with it... It's not here yet, so I don't know. The 27th can't get here soon enough.
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Old Apr 25, 2006 | 05:35 PM
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That's hardcore...
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Old Apr 25, 2006 | 05:50 PM
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Originally Posted by $100T2
. What are solid clamps?

FI hose clamps.
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Old Apr 25, 2006 | 05:52 PM
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i have run a stock port 12a with a rb dell setup for like 5 years on the stock fuel pump and have had no issues.
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Old Apr 25, 2006 | 05:59 PM
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Originally Posted by $100T2
Man, I just replaced all my soft fuel lines. Now I get to do it again, I guess... Unless the hose I bought is FI rated. What are solid clamps?
How much did you pay per foot for the hose? The FI hose is 2-3 times the price of the non-FI. The only one you won't need to replace is the one between the tank and the pump.
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Old Apr 25, 2006 | 06:35 PM
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Originally Posted by trochoid
How much did you pay per foot for the hose? The FI hose is 2-3 times the price of the non-FI. The only one you won't need to replace is the one between the tank and the pump.
I don't even know. I just told them to give me about 10 feet of fuel hose.
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Old Apr 25, 2006 | 06:39 PM
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If it is FI rated hose, it will be stamped on the hose along with the other data.
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Old Apr 25, 2006 | 06:40 PM
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Originally Posted by $100T2
Yeah, I was thinking of getting the one piece manifold for my 12A, just until I get my 13B rebuilt and ported. I'm hoping mine has the OMP inlets, because I really don't want to be bothered with pre-mixing.
I see the omp actuator but no omp inlets. You should ask whether or not he has the clip to secure the omp rod with. Otherwise your going to have to figure out a way to keep the rod connected to the carb. One other thing, What ever you do don't take off that gasket in the pic that shows the bottom of the carb. It won't reseal well and leak fuel.
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