Carb and Intake question

[Recovering Cuda]

Greetings, hope I'm in the right forum.   I have two questions.  The first is regarding my new manifold.  I purchased an Edelbrock performer, model 2176.  Now, it has tapped holes for the heater hose, brake booster vacuum etc.  In total there are seven of the same size holes, five at the front of the manifold by the radiator hose opening and two behind the carb base.  Now one will be used for the heater hose and one for the vacuum hose.  My question (could not find anything on the edelbrock site) is does anyone know what the diameter of these holes are?  I plan to plug the unused holes with Stainless steel pipe plugs.  I purchase 1/2 pipe plugs and they were too big.  I don't have anything big enough to thread into the holes to determine what the correct size is. 

My second question is regarding a Edelbrock carb (Model #1406 or 1405).  Now they list these as "manual choke" or "electric choke."  Is the manual choke operated by a cable or a pod like thing with a thermo coil that opens the choke as the engine warms?  I don't want to have to use an old fashion cable choke but I'm not sure if my electrical connection for an electric choke works.

Any advice and information is appreciated.

[MEK-Dangerfield]

My second question is regarding a Edelbrock carb (Model #1406 or 1405).  Now they list these as "manual choke" or "electric choke."  Is the manual choke operated by a cable or a pod like thing with a thermo coil that opens the choke as the engine warms?  I don't want to have to use an old fashion cable choke but I'm not sure if my electrical connection for an electric choke works.

Any advice and information is appreciated.

My knowledge is only big blocks, so I'll answer your second question. Definitely go with an electric choke. The manual ones are using a cable, and they can bind so easily. I had one on my 70 when I first bought it, and it wasn't long before I removed it out of frustration.     I'm not sure where your connection for an electrical choke is, but if it doesn't work(choke will stay closed), there are other places to get 12v, such as the input to the ballast resistor.

[slsc98]

Hey MEK , Recovering,

I don't think it would be hi -jacking of a thread for me to ask, Can you possibly point-out "the right " electronic choke out to me -- say, at either JEG 's or Summit?. Assuming the answer is info Recovering is also gonna need . . .?

I too am pretty frustrated with my manipulation as it seems to be binding, etc.  my engine is a 440 magnum (out of a. '70 GTX) with a Holley 850 double pumper atop it.

Thanks in advance!

[72cudamaan]

3/8 pipe plugs. Easier to fix an electrical connection than to buy another carb. Electric choke is the way to go. 

[72cudamaan]

Hey MEK , Recovering,

I don't think it would be hi -jacking of a thread for me to ask, Can you possibly point-out "the right " electronic choke out to me -- say, at either JEG 's or Summit?. Assuming the answer is info Recovering is also gonna need . . .?

I too am pretty frustrated with my manipulation as it seems to be binding, etc.  my engine is a 440 magnum (out of a. '70 GTX) with a Holley 850 double pumper atop it.

Thanks in advance!

i think there is only one add on choke kit for a Holley. Do you know the model of carb you have?

[slsc98]

i think there is only one add on choke kit for a Holley. Do you know the model of carb you have?

Doh! I believe I retrieved all that info when I had to replace a linkage on the manual couple months back; I am gonna have to go digging (car is wrapped for winter about 1/2 hour from our house. (No biggie if I need to go down and 'visit' her to get the model though ;-). !!!

[Talkwrench]

What size is your motor? if 360 ci    1406 is too lean, better a 600 Holley , You MUST use the intermediate plate between the carb and manifold!

[Recovering Cuda]

Thanks for all your inputs.   As for the carb I'm looking at, my '73 Cuda is a 340 with a purple cam.  Is 600 cfm too small?  I have no intentions of racing or running this car hard for the same reason I wouldn't make my grandmother run a marathon.  Don't want to over carb either.  I know there is a formula for figuring out what CFM's you need, but they don't take into account cam size.  Suggestions are more than welcome.

I do have a single spade wire on the right side of the carb.  I'm assuming that is for the electric choke.  PO installed a Holley but removed the choke plate in it.

Cudamaan, thanks for the dimensions.

Electric Choke it is.

[72cudamaan]

Cubic inches x2 is a good formula for cfm's. In your case a 340 needs 680 cfm. And you're not terribly interested
in getting grandma to the finish line so a 650 would be about right. A 600 imo is too small.

[jimynick]

Just for the sake of being contrary, my Challenger has a cable choke and I had no problem. If it binds, it's likely that it's bound somewhere or dry as a popcorn fart. Take it out, coil it up and put it in a container with oil in it, soak it for a day or two and remove/clean it and put it back in. You can pull the inner cable right out and lube it with Lubriplate as well. I've seen 10 times more grief with automatic chokes than manuals. As for the choke blade of the Holley you already own, there's not a more common carb in the world than Holley and parts, even in Oz, shouldn't be too hard to come by. Food for thought, that's all.

[slsc98]

. . . Food for thought, that's all.

And much appreciated, at that!  Yeah, you've given me "cause for pause", especially as everything was working oh so fine, up until about 6 months ago . . .      (Doesn't necessarily address the OP's post but, again, you given me something to chew on . . .)

[Recovering Cuda]

Thanks again for the info fellas.   An electric choke 650 cfm will be added to my list.

[Racer57]

At a minimum use the 1806 AVS 650 which has electric choke.

[dougs bs23]

You can also look at a qwikfuel. HR650 elec choke vac secondary   It may take a little tweaking to dial in but a vary good carb nonetheless


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[cudabob496]

first page mentions some various plug sizes, though not specifically for the 2176. 

http://static.summitracing.com/global/images/instructions/edl-2176377671767576-performerpe.pdf

towards bottom of this page, is a CFM calculator. 

http://www.summitracing.com/parts/EDL-2176/