Hey guys, Im getting a new Edelbrock carburetor within the next week. Im putting this on my 289 in place of the stock 2bbl carb. Do I HAVE to buy a new intake manifold? If I don't, how bad will it hinder the performance capabilities?

 

IMO, that would be dumb. It's just throwing a 4 barrel on top of a 2 barrel manifold. You wont really, see any differences except in gas mileage.

 

How bad will putting these on affect my MPG?

 

I just read your engine specs. I think you should go ahead and put on the 4 barrel manifold too. They aren'y all that expensive, and with the cam, and headers, and all, It should really wake up your car. As far as the MPG, i cant tell you that.

 

Yea, I think I am gonna get one. I really am waiting to see how these add-ons will affect my car. The only thing they didnt do when they rebuilt the engine, was add a new carb. They had headers on there and everything else, but not that. Thats why I think it was a project car that the previous owner never finished. Idk, we'll see in the coming weeks!

 

Dan66stang,

I have to totally agree with everyone else. Adding the carb with out the intake does nothing really. But if you are going with the Edelbrock carb - an Edelbrock Performer will do wonders. Available at most of the parts houses, but do the price shoopping, I found that there was a big difference in price with shopping.

Good Luck
Gary

 

adapter plates arent the best idea. Put the manifold on it and you will be happier. Stick with a dual plane such as the Performer from Edelbrock or Weiand Stealth. Thru Summit or Jegs they will run about $150 for the intake alone.

 

Yea, Im getting the edelbrock carb and intake from summit. What does dual-plane exactly mean?

 

It is basicly two 4 cylinder intakes. One has a plenumn higher than the other and feeds 4 cylinders, while the other feeds the rest. They create a stronger signal to the carb, fuel doesnt pool up in the bottom as much, and they are usually lower so they fit under the hood much better. Dual planes are better for bottom end torque, at least on small engines like 289/302's