 Weber Carb Restore Questions, Manifold preferences, Manual Choke, etc.. |
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| Literati914 |
 Aug 5 2026, 07:13 PM
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Advanced Member  Group: Members Posts: 2,385 Joined: 16-November 06 From: Dallas, TX Member No.: 7,222 Region Association: Southwest Region  |
I'm going to restore (try to) a set of Italian Weber 40idf carburetors to put on a 1.7 engine. I have two sets of manifolds... one set has a vacuum port on one runner (each side of engine), and the other has none at all. Is one type favored?
Which do I want to use, and why? - I have no idea what the vac ports would connect to. If they help even out idle, I'd want them I guess. Thoughts? |
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| Literati914 |
Aug 6 2026, 04:26 PM
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Advanced Member Group: Members Posts: 2,385 Joined: 16-November 06 From: Dallas, TX Member No.: 7,222 Region Association: Southwest Region |
QUOTE(Ninja @ Aug 6 2026, 05:18 PM)  You will want the smallest venturis available for that. Pierce Manifold is my go-to for Weber stuff. They should have 27 or 28s available. I'd start with 135 mains, 200 Airs, and 50 or 55 idles. 40 IDFs with 28 venturis are excellent for 2.0Ls with a "street" friendly motor. Manifold ports don't matter, just make sure to cap them off. Those might be helpful if you were going ITB fuel injection as they could form a plenum for an IAC (idle air control) valve. Good real world info right there, thanks |
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Posts in this topic
Literati914 Weber Carb Restore Questions Aug 5 2026, 07:13 PM
dtmehall what kind of distirbuter? Aug 5 2026, 07:18 PM Literati914
what kind of distirbuter?
These are bigger port... Aug 5 2026, 08:01 PM porschetub the inlet manifolds you describe with the large va... Aug 5 2026, 10:31 PM 930cabman [quote name='Literati914' date='Aug 5 ... Aug 6 2026, 04:52 AM dtmehall i am running 40idf's on a 1.7, and it runs gre... Aug 6 2026, 03:28 PM Literati914
the inlet manifolds you describe with the large v... Aug 6 2026, 04:11 PM Ninja You will want the smallest venturis available for ... Aug 6 2026, 04:18 PM dtmehall i am running 52 idles and 125 mains Aug 6 2026, 04:40 PM
porschetub
i am running 52 idles and 125 mains
I'am a D... Aug 6 2026, 09:36 PM dtmehall and 28 mm venturis Aug 6 2026, 04:41 PM Literati914
i am running 52 idles and 125 mains
and 28 mm ve... Aug 6 2026, 07:14 PM Literati914 Thanks again guys!
One set has what I guess i... Aug 7 2026, 02:24 PM porschetub
Thanks again guys!
One set has what I guess ... Aug 7 2026, 03:09 PM dtmehall no chokes on mine Aug 7 2026, 04:20 PM |
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