I know one has a vertical orientation and the other has a horizontal orientation, but do the bolt up to the same flange? Could I bolt a Dell to an IDA manifold?
Thanks

 

no the floats would not work correctly. if you mean using a sidedraft on a dwondraft manifold. also the downdrafts are wider than side drafts.

 

what are the advantages of Downdraft to sidedraft , other than clearance?

 

Downdraft flow more and crate a shorther runner. Therefore they usually have less low end tq, but tq and more hp up high.

 

not unless he wants the VW downdraft dellorto's like the IDF's. at any rate, differnce flange

 

Yea Weber IDA and Dellorto IDF have the same flang. Side draft and downdraft are different however.

 

The shortest runners are on the Lake Cities type manifold where the carb is mounted over the exhaust manifold. TWM also used to sell a dual DCOE type manifold laid out that way, supposedly with two 40DCOEs (with 32mm venturies, for a "correct" 5:4 throttle/venturi ratio) it would have stock-like driveability but outflow a 48IDA setup.

But IDAs are pure racing carbs, while DCOEs are street carbs (they actually DID come from the factory on many cars in the 60's) so racers tend to use IDAs. I don't know much about IDFs except that I *think* they are downdraft versions of the DCOE.

I would imagine that putting a downdraft carb on a sidedraft manifold or vice-versa would be *hilarious* the first time the fuel pump was turned on. The carb's float bowls are like a toilet tank, with a float and valve assembly and the fuel goes out through the bottom. Now imagine a toilet on its side...

 

Ok, so what I was looking to do was put TWN IDA like throttle body on my Lakes intake manifold. Since it is FI it should be fine to mount it side ways, but it does have the 50mm venturis so the 5:4 ratio may be off.

What do you think peejay?

 

IDAs are huge and don't bolt to DCOE pattern.

Throttle bodies shouldn't have venturies, that's a carb only thing.

 

Ok, the throttle body is 50mm and I have been using a Dell 48 on my Lakes (but I do not know the venturi size) . Here are my ifs:
If the two openings of the throttle body lined up with the two openings in the Lakes.
And I used 1/4" piece of aluminum as an adapter.

Would the venturi runner ration work

 

Why not just get a DCOE throttle body?

 

Dang Jeb I'm all confused on what you're trying to acomplish here. You've got IDA style FI and you want to put it on a side draft style manifold? It'll workgreat if you make a spacer of some sorts.

 

ida, different bolt pattern than dcoe, no workie

 

/\ /\ That's why I said he'd need to make a spacer of some sort to convert from the dcoe to ida bot pattern. But, I guess it would be easier to sell the IDA manifold and just get a side draft manifold than to have a spacer made.

 

Peejay and everyone,
I was looking at this a couple months ago and now I am back thinking about this again.

Here is what I would like to do. I would like to put my IDA type 50mm throttle body on a home build Lakes type intake manifold. (Yes, I can weld) This would make the intake runners about 6" long. Everything would still fit under the hood (unlike most IDA setups).

This intake system would go on a big street ported 13B, and I plan on using a Megasquirt controller.

My questions are:
1. can I get the right intake runner ration on this setup and can you tell me more about this.

2. have I gone way too big on the throttle body size.

3. what suggestions do you have to pull this off?

4. one last thought. I planned on tilting the intake upward a bit when I build it to keep it away from the exhaust heat. Any thoughts?
Thanks

 

Can't comment on the TB, but for the intake, pick up weld ells in the diameter you need. The entire intake shouldn't be that hard to fab if you have flat stock for the flanges, hole saws of the appropriate sizes and a die grinder. You could even look at some of the custom turbo headers and wiggle the tubing to where ever you want it in the engine bay, keeping the intake runners equal length. Runner length will be a prime factor on optimization for intended rpm range.

Sounds like an interesting project, pics during the fab process, pics will be a must. I'm still looking for ideas to keep the 12A bp in the widebody, use a TII exhaust mani and turbo. MS and FI. What has stopped me was a way to develope an intake to mate a TB too.

If you are going semi Lake Cities style, heat shielding will be a given. Ceramic powdercoating on the outside might solve the heat issue a give a cleaner looking install.

 

Well I think these pics are some what relevent to the style of intake you are talking about. Maybe you can get some ideas from them. I will try and find some more info on them if you want. Hope they help.

 

Wow, now that is a wild setup!
I am going for about 1/2 of that,
using just one 2 barrel 500mm throttle body.

 

why don't you just get an IDA manifold?

 

thats a really nice and expensive setup, but all you need is a 50 mm ida throttle body.. your is more original tho, and it will run good too