Direct mount 2BBL

[Anonymous]

Now that the weather is looking much fairer for outside activites, I've been thinking about a direct mount 2bbl carburetor. I have a '77 log head, so it shouldn't be a problem. The only thing that is holding me back is the final results.

My question is, will I see better performance (and economy) from my current duel Webers or will a 2BBL, like a motorcraft 1.21, be better?

The Webers are funneled.

 

[ASMART]

What dual webers are you running?

 

[Anonymous]

Two 32/36 with funnel adapters.

I did some analyzing last night with EA 3.0 and it looks like I am getting pretty decent performace already (and mileage). If I were to go with a single 2bbl I would need to increase my flow to something like 500+ CFM to equal what I'm currently seeing.

Hmmm...

 

[ASMART]

I had thought about using 2 dgvs like that also. What are your engine trany and rearend specs? WHat kind of performance are you getting?

 

[Anonymous]

Engine is basically stock. No aftermarket camshaft or headers. The transmission is a C4 w/ a rear differential ratio of 2.8:1

As far as performance, it's pretty good actually. Alot of torque. And the mileage is usually between 20-22 MPG. It was a little better with a single progressive, about 25 MPG, but I wanted a little more...go.

I may put on some headers next year, then again...I may not.

After running several simulations, adding headers didn't really pay off. I would have to add a good aftermarket camshaft and dual exhaust before I say a pay off. But that's an additional 400 bucks - I can wait.