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Jetting a Weber 45 DCOE for a stock 1275 cc

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twas_brillig

Jedi Knight
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I picked up a 45DCOE Weber and manifold for a 1275 last summer. The hope is to install it on a stock 1275, going into a restored Bug-Eye body tub (along with a Datsun 5 speed and front discs) next year.

Can anyone recommend chokes/jets/etc for this combination? I've got a 40DCOE on a 948 and it's run fine since purchase, but I haven't seen any documentation for a 45 on a 1275.

We're at about 3600 ft elevation also.

Thanks,

Doug
Calgary, Canada
 
Here is a setup for a stock 1275 DCOE45
33mm = Choke
3.5 = Aux Venturi
155 = Main Jet
185 = Air correction Jet
F2 = Emulsion Tube F2's are made for top end according to the weber plant
50 = Pump Jet
45F9 = Idler Jet 45F9
50 = Ex.Valve
Might be a good place to start...

Here is what I have in my DCOE40 for my 1275:
30mm = Choke
4.5 = Aux Vent
120 = Main Jet
190 = Air correction Jet
F16 = Emulsion Tube
40F8 = Idler Jet
35 = Pump Jet
Plugged = accelerator pump discharge

If nothing else slap her on and see what she does as she sets.

If you dont mind me asking, what is the setup on your 948 for the DCOE40?

Dan
 
Gents! thanks for the advice and the info!

This is a next year project, but at least I've now got a base point to work from. And when I've got practice with the 45, I'll have a look at the 40DCOE and advise what it has - bought it some 20 or 30 years back, so can't quite remember.

Thanks again - you guys have really brightened my day!

Doug
Calgary
Canada
 
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