Tunnelport single or dual carb?

[Katz427]

Does anyone have an opinion on single vs dual 4's on a single plane  tunnelport intake? I have a single plane for Holley 4500 and have a gent that wants to trade with his 2-4 setup. I have no experience with tunnelports. Mainly street driving and a little strip time.

[CaptCobrajet]

I tested the 4500 manifold and the single plane 2x4 on the same engine.  Power was just about the same.  The 2x4 was just a little better peak and the single carb had a little more low end torque.  They were so close you would never know it in a street car.

[fekbmax]

I'm thinking cool factor,  since it's mostly street, a 2x4 setup on a tunnel port would look and perform awesomely. . And in a 66 galaxie! !! 2 door ?  Awesome. That was my first car ever. No tunnel port though lol, just a 390 4v.

[garyv]

Nothing cooler than a 2x4 Tunnel Port
Of course I have to admit I'm a little partial.
garyv

[cammerfe]

It's not on-point to your question, but if you could find one, your best bet is the dual-plane 2X4. Many years ago Brother Lon and I did a TP for his then-new '67 Mustang. The TP parts came from the LeMans program by way of EEE. There's a lot said about lack of torque with the TP, but FoMoCo used the dual-plane in a road-race car that was only going about 25 MPH at the Arnage 'jink'. Let me assure you that there is no lack of torque. The stuff we got included a pair of 652 center-squirters. They weren't massively good on gas---particularly with the 4.44 DL in the rear end.

Some years later we re-did that engine to include a set of Dove's TP heads. I wrote a several-part series of articles about the combination for Mustang Illustrated Magazine. We ran both the dual plane and a single plane manifold over the Superflow at HeadWinds. Wayne Kuchtyn showed us that both manifold designs were very well flow-balanced and there was no significant difference in flow volume from one to the other design.

KS

[TomP]

I think on a Tunnel Port the single 4v is almost as good because the dual quads are not as well positioned as they are with regular FE ports. The rear carb sits a long ways back. I used to have an XE numbered dual quad that had a T shaped divider down the center and across the rear carb. It separated the rear carb barrels and ports from the rest.

[Katz427]

I have to agree the 2-4 carb setup gets the bling award. A local car collector has a couple of 2-4 manifolds and is interested in a trade. Blair Patrick responded ..not much difference. I looked at the build he did for the road racing torino and he did real well with a 4150 on the single 4 manifold.( Of course those Tennessee boys sure know how to get those FE's running!) I did find a dual plane 2-4 just manifold and the price was a bit rich for my checkbook. The gent I get carbs from is not crazy about the 4500 on the street he likes a 4150 as well. I had better order the BBM block soon!