Zenith on 914-6 Options

[DennisV]

What are the challenges with using Zenith 40 TIN carburetors on a 1970 914-6 engine?

My understanding is Weber 40 IDTP would be the correct original carb. I also understand that 1970 911T came with this model of Zenith. So in theory, no problem?

We are trying to decide if we should rebuild these Zenith. If they are essentially same fit, form, function as the Weber, we will probably keep them. If there is some domino effect of now that you're using Zenith you also need to replace / modify x, y, and z, then we will probably try to source some Webers.

Thanks for sharing your experiences.

P.S. Would I be correct in understanding that the key concern when evaluating the carbs for rebuild would be:

1. Throttle shaft bearing wear
2. Floats that leak

[nditiz1]

If you have an engine and want to try them out before you buy them, I have an extra set I was looking to get rid of. I have a set running on my 2.4 now. This other set was listed here, then went to Canada, then to me. I bought them to diagnose an issue with my current ones, but ultimately was an extra gasket on the intake causing a lean issue.

These were rebuilt and I changed out the throttle springs with new ones as the others, while functional, were not correct. I am also going to buy new squirter jets as these were modified. I buy all my parts from Alfa on ebay.

These are/will be bolt on ready. I can also accommodate the jetting to suit your engine. Let me know if interested.

Besides all that you could send them out to Dave Cheney who took over rebuilding Zeniths from Paul Abbott.