Eddy dual Quad

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69superbee

69superbee

Pete E
Joined
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Hiya folks,

I have been kicking around buying that complete eddy dual quad package for my 440. has anyone had any experiance ?
this seems like a cheaper/ easier solution than the 6 pack. ( less tuning ) the price is right on this setup at 1100.00 bucks let me know what ya think.



74 Dart

My 440 is built as follows.

Eddy Performer RPM intake with 750 Holley

0.30 over
10:50
915 heads fully ported.
comp .481 .491 cam
Msd pro billet dist with 6 AL box
Hooker Super comp headers .

trans 727 with manual valve body
2800 converter

391 gears super stock springs relocated.
8x26 inch MT ET Streets.
 
Your motor is mild enough that you won't see any gain and might actually have less performance. Actually tuning a six barrel/six pack is not as bad as you think, the secondary carbs are vacuum, so really you are tuning the idle with the center carb only. With most dual fours you have to set both carbs for idle mixture.

Yea, I know here I run dual fours and I telling a guy not too, but it is a race car not street car. If I converted my car to the street I would go with the six barrel.

Plus the six barrel/six pack set up will hold it's value much better than a dual four set up.

Just things to consider,
Chuck
 
Thanks Chuck .

I mostly drive the car on the street . and was wanting to go for something cool looking :) I have considered going with the 6 pack but by the time I get it all that I would need I would have a couple grand into it . and it really is not a race car ( anymore ) just a neat driver.

If you think that I should back off from the 2x4's I might as well just put a new quick fuel 750 on it and be done.

The reason why I even considered the induction swap was that I needed a new carb.
 
Well, the cool factor can't be beat when you pop that hood.
 
Agreed, dual fours are pretty tough looking. If you are after the cool factor and it is not that important if your gain is minimal I would do it, once they are dialed in they will be fine.

Chuck
 
LOL At the local cruise nights A lot of jaws drop when I pull up in my lil dart and pop the hood displaying the 440 in it already.
Ya really think I would lose a bunch of power with that Low Profile Eddy Dual Quad setup ?

the RPM range is right there with my cam 1600 - 6500
and I figured that with The hogged out big valve 915 heads I would be right there in the ball park.

Maybe Not enough Piston ?

Finally figured out how to post picts :)

bigdart-resize.jpg
 
It probably won't loose any power, and even if it did it would be so minimal that you wouldn't even notice it over the howl of all 8 barrels open.

Is that an early 70's nose on a mid 70's back half? I wondered how that would work.

Chuck
 
The front end fits perfectly. on the next repaint I am thinking about putting a 70-72 rear on it . I couldnt find a 70 - 72 that was in very good shape locally. and the price was right on this one.
:) Whatcha think of the lil half breed booger ?

Yeah Screw it I'll go for it . it will give me something to tinker with this summer.
if I dont like it I can just sell it . I was spraying it last year so I will have to work out how to get the spray to work as well. 2 plates maybe ? and jet them both for 75 hp ?
 
What exact intake-carb combo you thinking of SuperBee. It sounds pretty close to the 440 dual 4, 69 SuperBee I used to run.

Terry
 
I do not think you'll lose power if you select a set of carbs with a total cfm rating very close to what the 4bbl is now. Going to large on the set, IE; a pair of 750's, will just make it muddy some place and scream up top.
If your current 4bbl. runs great, and the cfm is an 800 or 850, then a pair 500's will be OK. A set of 390 Holleys would be to small. (780 cfm)
A pair of 390's to replace a 750 would be better.
 
the intake and carb set that I was considering is the one that summit is offering in their combo package. it is the low profile dual quad. with 600 carbs.for the big block package. the rpm range is 1600 to 6500.
i could prolly order it with the 500's that they offer for the small block.

I wouldnt dare put a tunnel ram on this engine combo. I have tried that in the past ( when I was young and dumb ) it was a disaster. and I still have that intake and I cant give it away.

I have a 750 holly on it right now and it could use a little more carb on it for sure . but , I am not sure that it would like 1200 cfms. but a couple leaned out 500's might do the trick .
 
You could probably get away with the pair of 600's because your engine has some good part for horse power on and in it.
With the fully ported heads and reasonable lift Comp cam, you should be making some power there.
The pair of 500's is what I would do myself.
 
yeah that is zactly what I was thinking. the 500's would suit the milder build much better.

I was looking at a different cams and I want to keep the duration down a bit. @ 0.50 my cam is 230 intake 236 exaust. that is on the ragged edge of where I want to be at with my converter and gear. but,
I cant find any better match for my application and the RPM range that I want to operate in . for the most part that is about all that the heads would really want and still be effective from off idle ( or as close as I can) to 6500 RPM.

I thought about loading up another case with a 4.10 or 4.30 gear for the track but , on a 26 inch tire the lil 440 might have its tounge hanging out a bit too much on the big end. I am right at 6000 through the traps right now. and it seems to be a pretty good combination. and it is still pretty drivable on the street.

I think it is pretty weird that there really is not alot of cam choices for big blocks for off idle to 6000.

the best one I found was 1500 to 5800 but it falls a bit short so I went with this one .

I thought it was funny I called com and told them what I was building and what I wanted and they told me that I should go with .525 mechanical cam so like a dork I bought it and a good friend of mine asked me if I was nuts. so, that cam is sitting on the shelf he said that it would be a total pain in the butt to deal with on the street. and I should use it only if I am going to just race the car.

he had a little 440 running 11:40's in an a-body. pretty much stock with 100 shot of spray. I was inpressed that he so little into it . this thing didnt even have frame connecttors ( was totaly ugly leaving ) and was 4 door.

I went with a little stouter combination and this is what I have. and it is a nice durable motor. that will live for a long time and make power down low. I used his engine and car for a base line and improved on it im hoping for some mid 11's on motor and if I spray it I am hoping for low 11's I think I am in the ball park . we will see :)

I never got a good pass last year because of my crap carb and I didnt dare spray it . so , I am not sure what it will even run with the combination I have. due to funds it was pretty much a cruise night car.

I thought that if I add the 2x4's and get my spray to work it would help it out big time and I can really see where I am .

Thanks for all of your input :)
 
SuperBee if I may offer my opinion. 3 cars ago I ran a 69 SuperBee with a dual 4-440, mind you mine was a 4 speed but I did alot of fooling around with that dual 4 to try to get it right. It seems to me the carbs were either 600 or 650cfm either way to make the combo work I had to use a more radical cam than the one you're using. .525" lift sticks in my mind but this was 10 years ago. I was also running the same comp. ratio as you and the big drawback was the loose of so much vacuum that my power brakes were useless. Obviously there are ways around that and the engine ran very strong and sucked gas, but I eventually went back to a 850 holley DP'r on a Weiand single plane and the engine performance and 1/4 mile times stayed about the same and was much easier to tune. Also if you're thinking of running juice the single 4 barrel is much easier to work with. Just me opinion.

Terry, "give er till yer liver quivers" :burnout:
 
yeah I agree with you.
I might kick it around for a bit longer. before I make a move. I still have a long time before spring.
I will not have to worry about vacum probs I have manual brakes.

I know that I have to have a carb and the 2x4 was pretty cool. Summit has the whole deal for a good price. but I can save the cash and get the same performance.

I cant remember what the A-12 cars had in them for cam and compression off hand ? but, then the 6 pak is a totally different animal. Ill check with mancini and see what the sell the 6 pak package for and then weigh my options.
 
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