34 ADM

[jeb358]

Does anyone have experience using a Weber 34 ADM carb on a Spider. I suspect that it has larger venturis than the 34 ADF. If you have, can you give guidance for jetting if installed on an 1800?

[131]

I had one on a 2 litre 131, a great upgrade. The primary and secondary venturies are each 3mm larger than the ADFAs that we got on 131s in OZ. Some local ford straight sixes came out with them over hear, as far as jetting was concerned, I played around with what I had, jets from Fiat and Ford carbs, until I got it running pretty well. No science behind it, a good tuner could probably have got more out of it.