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Weber Carb mods??
I have a 1969 911t 2.0 with Weber TIPO 40IDA 301 carbs. I'm rebuilding the carbs and needs some assistance. Can I upgrade to a higher volume choke. Currently it has #30. I'm going to mirror polish each one just in case I can't modify my carbs. What kind of mods do you recommend for this carb?
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06-20-2025, 08:51 AM
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Registered
Join Date: Jan 2022
Posts: 161
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Hi
Original factory chokes for a 2 liter, 911T engine are 27mm. Would suggest you don't go any bigger than the 30mm ones you have . See link below for more info. Cheers https://forums.pelicanparts.com/porsche-911-technical-forum/989063-weber-pmo-throttle-venturi-sizing-equations.html Last edited by Magyar Kiwi; 06-22-2025 at 04:56 PM.. Reason: Clarity |
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06-20-2025, 04:45 PM
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Banned
Join Date: Jun 2025
Posts: 6
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Absolutely, you can go up in choke size depending on your engine setup and goals. A #30 is on the small side, if you’re running a stock 2.0, something like 32–34mm might give you a bit more top-end without sacrificing too much low-end response. Just be sure to match jets accordingly.
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06-21-2025, 01:43 AM
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It's a 914 ...
Join Date: Jan 2008
Location: Ossining, NY
Posts: 4,689
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Here are some recommendations from PMO on Weber carb setup. I think the ports in a 2.0 T are 30 or 32 mm?
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06-21-2025, 07:07 AM
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| Tags |
| weber 40 ida 3c , weber 40 ida 3c rebuild |
