Weber Carb Question

[James_Douglas]

I finally decided I did not want to mess with old carbs anymore on the Desoto.

I went and got a new Weber DGC with manual choke.

They had a choice of linkage arms, a couple of dollars each, and so I took them as well.

The carb with the adapter fit on the manifold fine, except the studs wanted to hit the body of the adapter so I took the studs out and used a couple of exhaust manifold bolts.

The throttle arm I got from them works out well and all I had to do was lengthen the rod to the carb. I was already using aircraft joints so that was easy.

The thing runs ok, but it does not want to idle well. It is apparent that the idle jet is too small. It had a 55 and I put in a 60 which helped a little. I think it is going to take a 70 or maybe an 80 to get it correct.

It also has a full throttle from a stop bog. Bad. Could be the secondary idle jet or maybe the secondary main jet it too big.

If anyone is running a single weber, can you pop out the primary idle jet and tell me what number it is ?

The idle jet comes out of the side next to the accelerator pump and takes 10 seconds to remove.

Thanks, James

[Johnny S]

James .... do you have a photo to post of the setup? Sounds interesting.

[James_Douglas]

When it is done, I will put up some photos,

James

[claybill]

fiddle with the old carb...fiddle with the new carb..it never ends!

bill

[Johnny S]

Thanks James.

[James_Douglas]

Here are some installation photos of the single new 32/36 Weber. Manual choke.

The adapter wanted to hit on the larger original manifold studs. I used some exhaust bolts, with the small hex head, and it went on fine.

The fuel line took a little bend and I cut a short length of hose and that was done.

I purchased a couple of additional throttle arms that they sell with the DGV Weber's. The one I used needed to have the top of the thing ground down a bit to clear the manual choke bracket, but that took 5 minutes.

I have have full travel on the carb throttle shaft that matches the travel of the pedal perfectly. One of the holes in that arm is the same distance from the centerline of the throttle shaft as the Carter. I just needed to lengthen the long throttle linkage about 3/4 of an inch.

The carburetor comes with a number 55 main idle jet. I put in a 60 and it is not enough. I ordered a jet pack with a 75,80,85, and 90 plus main jets, air bleeds, and accelerator pump nozzles.

Once I get it jetted properly, I will post what combination of jets works on a 251 engine.

Best, James

[martybose]

James,

It sounds like you have found a good source for Weber stuff. As I am about to embark on a similar journey with my Carter-Webers, can you point me in the right direction?

Marty

[James_Douglas]

http://www.piercemanifolds.com/products.htm

These are the folks.

If you look on the linkage page, they sold me just the arm from the following kit which worked well. I did have to grind the top down to clear the manual choke bracket however.

99007.116 DGV Throttle Wheel Kit

James

[James_Douglas]

I know that a few of you guys are running the Weber's. Can some of you take 2 minutes and pop off the idle jet, which is in the side of the carburetor and tell me what number you are using.

I need to get a baseline to start with.

It does not matter if you are running duel carbs. The jet numbers run from about 45 to 90.

Thanks, James