satellite66
Well-Known Member
I have a 4bbl intake for my 318 poly. It has the casting number 2206384. I bought a carb for it but now I'm wondering if it's not compatible. It's an Edelbrock 650 AVS Thunder. If it isn't correct, what carb would be?
318 from 2bbl to 4bbl
- Thread starter satellite66
- Start date
mosquito13
Well-Known Member
call edelbrock , folks there are more then helpful. first rate customer service is all i have ever gotton from them.
rumblefish360
Well-Known Member
Oh gawd ease, Edelbrock, LOL!
Sat66, the carb will not work on the OE intake because the OE carb was small a d your 650 AVS butterflies will not open.
But! You should get the Edelbrock thick gasket. Thicker the better. It comes with extra long studs, washers and nuts.
You'll have to fiddle with the OE linkage to get it to work or purchase a Lokar cable set up. Or like equal to it.
Sat66, the carb will not work on the OE intake because the OE carb was small a d your 650 AVS butterflies will not open.
But! You should get the Edelbrock thick gasket. Thicker the better. It comes with extra long studs, washers and nuts.
You'll have to fiddle with the OE linkage to get it to work or purchase a Lokar cable set up. Or like equal to it.
rumblefish360
Well-Known Member
I has a problem with a freinds '66 ChRger Poly 318 and a OE 4bbl. intake. The carb is a 600cfm Edelbrock. The butterflies would not fully open. The intakes 4 hole pad was the problem. Even if the OP's carb clears with a thin gasket, I seriously still suggest the thicker gasket to keep the carb cool and avoid fuel perculation.
Mrkinger, does your poly 4bbl. have a 4 hole carb pad? Is it a OE intake?
Just checking.
Mrkinger, does your poly 4bbl. have a 4 hole carb pad? Is it a OE intake?
Just checking.
mosquito13
Well-Known Member
i have the wieland intake with a eddy 600 no problems with linkage on a poly, but then the whole thing got replaced by a 440 w/ a eddy 800 thunder, cause bottom line it was a poly 318. and to sound like a jerry sienfield episode "not that there is anything wrong with the poly "
Dako
Well-Known Member
I've got the AVS Thunder Series 650 square bore carb on my 318 Poly with no problems. Since `66 Polys weren't offered a 4bbl option, I'm using a `62 cast iron manifold. I did add a 1" phenolic spacer from Jegs. The bore size of the spacer holes are basically the same size as the manifold. The spacer keeps the fuel cooler (by 70deg!) and adds a bit of power (Gary Pavlovich has documented it with dyno runs). You can go with a 1/4 or 1/2 inch spacer to aid in hood-to-filter clearance if you like. I doubt you would notice any difference in 'seat-of-the-pants' performance.
For your own piece of mind, verify (measure) the bore holes in the carb vs the bore holes in the intake. You can also measure the widest point of the protruding butterfies with the carb fully open. You will find the butterflies are not quite as wide as the intake holes. That is because the pivot point is up inside the base of the carb, meaning the whole lower half of the butterfies will not get down into the manifold...so no binding should be occuring.
One more thing: There is some 'wiggle' (play) in the carb as it goes on to the mount pad. Make sure the carb is centered as best as possible over the holes.
For your own piece of mind, verify (measure) the bore holes in the carb vs the bore holes in the intake. You can also measure the widest point of the protruding butterfies with the carb fully open. You will find the butterflies are not quite as wide as the intake holes. That is because the pivot point is up inside the base of the carb, meaning the whole lower half of the butterfies will not get down into the manifold...so no binding should be occuring.
One more thing: There is some 'wiggle' (play) in the carb as it goes on to the mount pad. Make sure the carb is centered as best as possible over the holes.
rolling_Thunder
Well-Known Member
I could not run Edelbrock cars on my factory dual quad Poly intake because of butterflies not being able to open... I believe they originally used a WBFC carb with smaller venturi...
satellite66
Well-Known Member
I measured the holes on my intake and they are 1-3/8 inches. The larger butterfly on the carb when open is 1-5/8 inches so it isn't going to be able to open if mounted to my intake. I don't know if the spacer has larger holes? I have a feeling that the carb I have is not going to work for me. MrKinger what carb do you have installed on your poly?
rumblefish360
Well-Known Member
Use the Edelbrock space 8715.
Dako
Well-Known Member
If all 4 butterflies are not the same size then you do not have a square bore carb and no, it will not work...unless you use something like an Edelbrock #2696. You can probably find a non-aluminum one, you will just have to search. I'm sure a phone call to Summit or Jeags would produce on in phenolic.
rumblefish360
Well-Known Member
Dako, your I correct, the 600/625/650 Varter/Eselbrock carbs have smaller primary's.
satellite66
Well-Known Member
I thought the Edelbrock 650 was what you used. Your intake must be different than mine. Anyway, I'm just going to send it back to Summit and rethink my plans.
Dako
Well-Known Member
This is the exact carb and spacer I have.
Edelbrock Thunder Series AVS 650 cfm Off-Road Carburetor, Electric Choke(P/N 18269)
http://store.edelbrock.com/18269ede...grsquareflangecalibratedforsinglequadapp.aspx
I used the 1 inch phenolic spacer from Jegs (P/N 555-154022)
http://www.jegs.com/webapp/wcs/stor...r=0&Ne=1+2+3+13+1147708&searchTerm=555-154022
What is the P/N of the carb you purchased?
satellite66
Well-Known Member
I ordered the 1806. I guess I should have ordered the 1826. The 1826 is a dual inlet (fuel) vice the single inlet the 1806 has. What does this mean as far as installation goes?
Dako
Well-Known Member
Dual inlet??? Not sure what you are referrencing. Mine is a single inlet.
Oh. There is an 'alternate' inlet on the opposite side of the carb that can be used in different applications.
satellite66
Well-Known Member
This is the link to Summit's 1826. http://www.summitracing.com/parts/edl-1826
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Looking at the photos though, it looks like the inlet on one side is plugged.
- - - Updated - - -
Looking at the photos though, it looks like the inlet on one side is plugged.
Dako
Well-Known Member
A quick google of your P/N indicates it is for a marine application, but that doesn't mean it won't work. I don't know if the openngs were any smaller than auto applications. Do some searching of Poly 277, Poly 301, Poly 318. Here is a start: http://www.allpar.com/mopar/a-engines.html Allpar has a lot of good info, but it can be challenging to find on their site.
What you currently have (carb and manifold) should work with a spacer. Jegs also has a 1/2" spacer if you wish to increase hood clearance at the air cleaner. I went with a 3" Spectre filter and 1 1/2" drop base plate from Autozone. The electric choke required me to 'ding' the base plate at the 'choke body'. It also required the purchase of the 'riser kit' to raise the filter base to clear the fuel inlet. I used the 1/2" riser for this. This is what hotrodding is all about figuring out what works and what doesn't.
What you currently have (carb and manifold) should work with a spacer. Jegs also has a 1/2" spacer if you wish to increase hood clearance at the air cleaner. I went with a 3" Spectre filter and 1 1/2" drop base plate from Autozone. The electric choke required me to 'ding' the base plate at the 'choke body'. It also required the purchase of the 'riser kit' to raise the filter base to clear the fuel inlet. I used the 1/2" riser for this. This is what hotrodding is all about figuring out what works and what doesn't.
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