Has anyone ever made a 2X4 intake for a Flathead V8? Pro's & con's for running one I didn't really see anything in the forum search Thanks in advance Shawn
I have never seen one, but that doesn't mean no one ever tried. It would seem to be way over kill for anything but a high zoot race flathead. Even running 2 390 cfm Holley's would be way over kill at 780 cfm combined. Although, I will wait eagerly for the HAMB to return some great pics.
How much cfm does a Stromberg 97 or a Holley 94 have? anf they run them in 4x2 's but like you said it would have to be a built flattie to handle the fuel
Who cares it would be cool...... especially if it were meant to be used with 4bbl from back in the correct time frame. You can call it "WHATIF" intake
yeah, it would be way to much cfm for a flathead. 4x2's is generally claimed to be a full race non-streetable setup. I believe 97's are in the area of 150cfm each. two 390cfm's would be like running five 97's on a flatty.....
Mike Davidson, owner of Flatattack Racing down under, made one by fabing the lower portion and using an Offy dual quad tunnel ram top for a SBC. It can be seen in his "Flathead Fever" book. http://www.flatattackracing.com/
Wow it would have to have tons of internal work to get it at the level need to run that style intake............but I bet it would be fun ........but what about the hilborn injection that they make for flatties how much flow is running through them?
I was thinking 2 early caddy 4 barrels. I would think that the jets could be changed. would it NOT be traditional if I made one in traditional way....
I would suggest you try running one early 4 barrel. every person I've talked to who put a small 4 barrel on a flathead just raved about how well they work. In my opinion 4 barrels, alternators, etc. have no place on a flathead. if you want to run something like that, run an overhead. if a guy had the money to play with a dual 4 barrel carbs in the 50's he would have spent the money on the overhead making double the horsepower to begin with!
Well, isn't that what hot rodding was all about....experimenting? I have a 4 barrel intake with an early caddy 4 barrel & an old after market dual 97 adaptor. Yes it only takes 97s. I was looking to see what other issues I would have to resolve. I do plan on building a belly tank car in the future with a flatty.
A 2x4 wouldn't work. Keep in mind that a 2x4 is actually 1.5x3.5 inches. You would at least a 2x8. Or maybe plywood.
Ok. I won't be able to get it to you guys for a few days. But, it appears to work well so far. It's in my avatar. It's a single plane 2 X 4 manifold, with the carbs set as directly over the ports as possible. The carbs are 1956 Ford holley 4000 series 4 bbls. They are rated at about 320-340 CFM each. That may seem excessive, but these are vacuum only secondary carbs with no mechanical connection to activate. It is really cool Jim
There was a cross ram intake for a flathead on ebay about 5 years back. Pre-war made and very cool... not for 2x4 I believe it was for 2x2. Forget the brand name but it went for almost 5k.
This guy is on the level. We went through this on the "Flathead Ford - 32 to 53" site a couple of months ago. He had the manifold custom cast by the guy that makes the Lincoln V12 multi-carb manifolds.
Yes, these are the snall bolt pattern carbs, similar/same as for Carter WCFB's. Venturies are about 1" as I recall. Think of it as running 2 Stromberg 48's, with the benefit of additional carbs as needed. Jim
I don't know if I ever actually posted pictures of my engine manifold. I meant to, but my Mom got ill and p***ed away about the time of this thread. Anyway, here are a few. First is the mold or whatever it's called before the casting. Then the others. Sorry for the delay Jim
Terry I have not seen the Flatattack manifold. It's probably setup for the larger base carbs? Where can I see a pic of it? Thanks Jim
First comes the "pattern". Then comes the mold (sand packed around the pattern), and finally the casting. And somewhere in there is a "core box" -a wooden mold to form sand cores (which have to be baked so they don't fall apart) which are suspended in the cavity created by the pattern in the sand. The cores create the runners.
I don't think you can get 4bbl carbs small enough to match even the biggest and best flathead flow characteristics.
Hi Mike Think of it like this: Your avatar shows two 2 bbl carbs. Mine runs exactly the same as yours, two 2bbls. The secondarys are totally vacuum driven. There is no mechanical linkage to operate them. They will only open as far as the engine deems necessary. Each is rated at 320 cfm Jim
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