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Author: Subject: Size of Webers.
JohanP

posted on 10/8/04 at 11:05 AM Reply With Quote
Size of Webers.

Hi,
Can anyone tell me when I should use Weber 40 and when to use Weber 45? I'm planning to replace the original carburator on my 2 liter Pinto-engine. The engine has only been cleaned up, painted and has had a new original camshaft fitted. Now I've been offered both a pair of used 40:s and a pair of used 45:s.
Are there any guidelines for when to use 40s and 45s?

/Johan





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Bob C

posted on 10/8/04 at 11:09 AM Reply With Quote
It's size of main venturi that counts - if you have a choke per cylinder there's a weber chart that tells you venturi size vs cylinder displacement & max power revs, I'll email you a copy if you want.
Cheers
Bob

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stressy

posted on 10/8/04 at 11:11 AM Reply With Quote
If your going to go for big power latter, i.e. 150 bhp+ then probably best to go for 45, if not you can get the power out of the 40s. If you go 40 you will probably get more low end torque. I used 40's when i had my pinto and they were fine.
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