call me crazy

[ratrod223]

So, I am building a rat rod. Going to be running a 58' ford 223 out a truck and have access to weber down drafts that came off of a 70's era jag, think they are 38's maybe 40's. Now if you don't know there are only 4 ports that feed the 6 cylinders on this particular motor, it isn't the most ideal head configuration but it works. Question is should I run two carbs and have larger venturies on the ports that feed the two cylinders? Two carbs with a plenum to attempt at getting even fueling, or three carbs with either a plenum or have a manifold with one throat of the carb feeding the single ports and two throats fueling the dual cylinder ports? I know the best configuration is one throat feeding each cylinder but when you are using a common port I'm not sure what is the best way around this, the easiest way is to run a common plenum for even fueling but that is kinda eleminating the point of running webers, except for the fact that two or three down drafts would look just plain cool on top of an old six sitting in front of a rusty cowl and a conglomerated 4 door sedan turned into a truck cab...


any help is appreciated,



Cory


p.s plans are to run a clifford dual exhaust with a couple of stacks coming out the bed... oh and that would be the only chrome on the entire car, just the original patina on the rest and a lil bit of rusty metal primer to cover any of the additional welds that may be exposed to the elements...did I mention that I am using a tractor grill off of an old farm all tractor ahahahahah, at least it will have 4 wheel disc brakes.

 

[Lazy JW]

Howdy and welcome to the forum!

I think it would work with one carb feeding 1-2-3 and the other feeding 4-5-6. The carb only feeds one cylinder at a time. With the firing order being 1-5-3-6-2-4 it will be pulling from the front carb, then the rear, back and forth. The siamesed ports will have minumum effect then. I think
Joe

 

[63redtudor]

You know, I wonder if the 223 series engines could use any of the technology from the chevy sixes, mainly the lump port mod?
Edwin

 

[ratrod223]

lump port mod? what would that be? I am new to these older six bangers, the only other six I had was in my jeep that I just traded off for a 72' chevy with a big block.

 

[63redtudor]

To fully understand the lump port mod (not fully sure I really do), you should check out & spend time on www.inliners.org. You also might want to pick up the book they sell about hopping up the chevy six. Even though there's obvious differences between the chevy & ford sixes, ANY manual with info on hopping up an inline 6 is something I want to have on hand to read. There's a lot of food for thought in there. Not only that, but its a great inspiration...

Basically with the lump port mod, the intake ports are opened up quite a bit & re-designed. I guess the originator of the idea got his inspiration from the big block heads. Now, there are fundimantal differences between the chevy six head & the 215/223/262 head. All of the intake ports are siamesed (1-2, 3-4, & 5-6) & the head bolts go right through the intake ports. It wasn't just ford that had crappy head designes for the I6 heads! Unfortunately I don't have a 223 (yet) to experiment with (we'll have to see how the wife likes that idea...), so I can't tell you from personal experiance.
Edwin

 

[ratrod223]

My roommate has them and he said they came off a jag, doesn't mean it was stock to the car. He says they are IDFs, they are still in storage so I have yet to see them in person. Also, there are plenty of applications where a single IDF or DCOE feed multiple ports on a plenum style manifold. Like I said I know that isn't the ideal application for this style weber carb but they are free and jets are only $3.95 a pop, venturies are $8.95, emulsion tubes $16.95 so if I have too much/little CFM feeding them I can always change things out.