My friend just offered me his polished old Edelbrock 2X4 intake manifold to use on the 327 SBC that I'm putting in my '54 Belair 2-door hardtop. He said he got the manifold at a swap meet in San Diego in the late 80s. Are these Edelbrock 2X4's still being made? How's $150 for the old manifold? That's what he wants for it. I'm thinking I'll take him up on his offer, but don't know whether this is a bargain or not.
Hey, thanks, Mutt. That put's some perspective on price. Guess another big concern is how many CFM a 2X4 would flow. Seems like you could have in excess of 1300 CFM without even trying too hard. The coolness factor is one thing, but GEEZ, what do you do with all that flow in a SBC?
I've been runnin' 2 600 aFB's on my Caddy 390 for a couple of years now...no problems...you might wanna go with 2 500's though, with the smaller dispacement...run a spark plug with a hotter heat range, and a hotter coil, and you'll be in business! Sounds like a good deal....good luck!
I bought a used Edelbrock dual quad manifold a couple of summers ago for $125.00, the same manifold Jeg's sells for $249.99. The #1404, 500CFM Elelbrock Performers were $210.00 each, progressive linkage is $50.00, Edelbrock makes a fuel line ***embly that is top shelf, another $50.00, then you need an air cleaner that can run anywhere from Edelrock's cheepie, $50.00 to Moon's $285. I run it on a 355 with a comp cam and Edelbrock RPM Performer heads and some other goodies..the engine runs excellent. A couple of things you need to know; the carbs sit very low on this dual plane intake, which has four individual holes in the plentum. Because the carbs sit low, it causes the them to get very hot, especially in my 40 Ford coupe, which tends to get very hot in the engine compartment anyway. The gas will perk in the carbs, so, you need to elevate them with a minimum of 1/2" heat spacers, I used 1". A friend of mine machined them for me, because this manifold only has one bolt pattern which is the narrow one and I couldn't fine spacers configured with anything but the wide hole pattern. Anyway, it solved the hot gas issue and really woke up the low end throttle response. The other thing to note about these manifolds is that the thermostate housing is off-center to the left, on my car it's not an issue but it does restrict the movement of the alternator. I run a 3:55 gear and my car flys, now that we worked the bugs out but, all that being said. Although this engine is new, I did break it in using a old dual plane (C-3B) Edelrock intake, 1" Mister Gasket torque spacer and a 3310, 750 CFM Holley. The performance is about equal, but the dual quads do have "the look". That's my input, Shoe
Now, I call that an informative answer! I'm collecting parts to finish off a dual quad setup for my 389 Poncho engine. I'll be running old carter afb's on mine. John, do you run yours with straight linkage or progressive linkage? Any problems with lean/rich fuel distribution from front to back? Inquiring minds must know.
Rockey I have a tendency to run a pair of the little Holleys on a dual quad setup, on a small displacement motor. But I think that the 500 Edelbrocks are a good choice. I never cared for the edelbrock carbs until I put one on my FE. Now my opinion has changed. I never run a progressive linkage on a 2x4. I just dont like the way they run, and there may be some starving issues on the rear cylinders with a dual plane. Edelbrock my have better info on the linkage, and their tech guys are pretty quick to get back to you. Here's the url http://www.edelbrock.com/ Well that's all I wanted to say
Rocky - I run 2 500cfm Edelbrocks on my 406 in the roadster. I use Edelbrock progressive linkage and two 6 1/2 in. K&N filters. There is no problem with fuel starvation - rear carb is primary as you can see. Since the carbs have idle circuits, you get idle flow to the front carb. System runs great on the street, and I don't make any changes for racing. Cam is 224/234 .465/.488 Summit (Crane), Performer RPM aluminum heads. No changes to carbs were necessary out of the box. If heat is an issue, you can use sandwich heat gaskets instead of the spacers - they work fine. The spacers will increase plenum volume if they are open spacers and are good for top end horsepower. However, four hole spacers will increase low end torque by raising the intake charge speed and better atomization of the fuel/air mixture. (Also helps mileage, but who cares about that? ) Hope this helps.. Mutt
Rocky, Mutt is 100% correct, my car is set up the same way. I use the Edelbrock progressive linkage with the back carb being primary. They are set up just as they came out of the box. This engine has been in my car for about a year and it has never as much as fouled a plug, but the Edelbrock Performer RPM heads use a RC-12YC which is a 3/4" reach. Two Holleys will not fit on the Edelbrock SBC manifold, not even the 450s. One more important thing and I got this from the Edelbrock tech reps, use a fuel pressure regulator and set it for 6 1/2 pounds. It's important because unlike the needle and seats in Holleys, AFBs do not like a lot of pressure. I have a pair of the heat spacer gaskets that Edelbrock recommends for this intake, I ordered them from Summit. I chose to use the composit spacers my friend built because they know a hell-of-a-lot more about induction then I do, Gene Fulton and Steve Maksymyk are pretty big in the Pro-Mod world. But, I would suggest that Mutt is right in saying the gaskets will do the insulation job. If you look on the Jeg's or Summit web site, they list for 30 some bucks. I've got them, my Wife already chewed my *** for using "our" charge card, if you get into this project and you need the gaskets, send me a PM with your address and their yours! Shoe
definitely did not work on the previous post. This flick was taken proir to installing the 1" spacers. Shoe
Didn't Edelbrock put out a hi-rise dual quad for the SBC at one time? A friend of mine found an old dual quad hi-rise for his BBC engine and it really looks cool all polished up! Insulating spacers aren't needed on it either.
The Jalopy Journal
