 Weber carbs, What's the difference? |
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| 914 Monster |
 Apr 13 2010, 09:13 PM
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#1
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Newbie  Group: Members Posts: 27 Joined: 14-April 08 From: Los Angeles Member No.: 8,924 Region Association: Southern California  |
Since I'm in the process of rebuiling my 2.0 engine, I was wondering why 914 high performance engines use 44 IDF carbs instead if 48 IDF's or IDA's. I'm not trying to build a race car or anything to much but want to upgrade my 40 IDF's.
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| GeorgeRud |
Apr 13 2010, 09:22 PM
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#2
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Advanced Member Group: Members Posts: 3,725 Joined: 27-July 05 From: Chicagoland Member No.: 4,482 Region Association: Upper MidWest |
Don't go too large on the venturi diameter, or you will not have enough of a "pulse" at idle and at low rpms! There is a formula that has been used to try to match the size to the size of the engine. The factory 914-6 engines came with 40mm diameter throttle bodies, but all the way down to 27mm venturis (to get a good enough signal for emission control at idle).
The 44s and 48s are usually best for race engines that will be run at high revs, not for street cars INHO. |
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Posts in this topic
914 Monster Weber carbs Apr 13 2010, 09:13 PM
Cap'n Krusty Because the builders don't want to overcarb th... Apr 13 2010, 09:21 PM Rand The answer is in your post. 2.0. There are a ton o... Apr 13 2010, 09:24 PM 914 Monster How exactly does one overcarb an engine? Apr 13 2010, 09:42 PM
Rand
How exactly does one overcarb an engine?
Are you... Apr 13 2010, 10:03 PM
ArtechnikA
How exactly does one overcarb an engine?
Here... Apr 14 2010, 04:59 AM 914rat Too much gas+too much air=overcarbed engine.More g... Apr 13 2010, 10:01 PM tat2dphreak
the question should be "how does one NOT ove... Apr 13 2010, 10:04 PM zymurgist +1 :agree: Apr 14 2010, 05:09 AM ME733 .........well done Artechnika....I agree.....and t... Apr 14 2010, 06:38 AM 9146986 IMHO you want your 40's with 38 venturis. If ... Apr 14 2010, 09:17 AM Jake Raby
Since I'm in the process of rebuiling my 2.0 ... Apr 14 2010, 10:51 AM pbanders When airflow is low (e.g. idle) a large venturi re... Apr 14 2010, 11:08 AM |
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