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Registered
Join Date: Apr 2008
Posts: 16
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40 idf or 44 idf carbs?
I'm converting my 2.0l 914-4 to a dual carb set up and I wonder the advantages or disadvantages of choosing a 40 idf or 44 idf Weber kit.
Thanks for your help. Brian |
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04-21-2008, 06:34 PM
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Registered
Join Date: Jan 2005
Location: Seattle
Posts: 347
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On a stock motor with stock cam, it's going to be tough to get any carbs to perform as well as FI. And you'll never get cold start and elevation changes to behave as well. But the 40s would be the best choice. If you were going to rebuild your motor, bump up the displacement, upgrade the cam and heads, THEN you could build a potent combo with the 44s.
Upgrading the cam to something designed to work with carbs should be your next priority. Any chance we can help you solve your FI problems before you make the jump, or are you missing parts? _ Last edited by RandyLok; 04-21-2008 at 07:25 PM.. |
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04-21-2008, 07:06 PM
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Registered
Join Date: Apr 2008
Posts: 16
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Thanks for the advice, I am actually installing a new (rebuilt) engine to replace my blown 1.7. The car was originally an Arizona car so it has had years of dust and sand in it and as I tore the old engine apart it was filthy. The FI that I have is from the 1.7 so I'd have to upgrade anyhow, hence the thought to go to a carb setup.
Brian |
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04-21-2008, 07:38 PM
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Registered
Join Date: Jan 2005
Location: Seattle
Posts: 347
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Ah. Cool. Sounds reasonable.
But really do think about the cam upgrade... Your performance and running temps would significantly improve by swapping that FI one for a carb version. |
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04-21-2008, 07:59 PM
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In the shop at Pelican
Join Date: Aug 2002
Location: Los Angeles, CA
Posts: 10,459
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what cam?
all things being equal, with a 2L displacement and a mild cam = 40's. anything bigger, go with 44's |
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04-22-2008, 08:47 PM
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Registered
Join Date: Aug 2006
Location: Los Osos, Ca
Posts: 398
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44's are too big for anything less than a wild 2056 or bigger. For a street car you'll always be happier with carbs that are too small than you will with too large. Slightly too small carbs you'll be leaving a couple of HP on the table, too large and you'll have a car that won't run under 4000 RPM's.
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04-22-2008, 10:56 PM
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