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Premium Member
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19 Posts
Discussion Starter #1
Question about the correct jetting for my 1600 engine with DCOE 27 carburetors. I have a copy of the owners manual from DuettoInfo.com which lists; main jet 120, idle jet 50F11. Both Twincarbs.com and Carbparts.eu state; main jet 117, idle jet 50F14 for the 1600 spider. The other sizes are all the same. Which is correct? I've set it up with the owners manual sizes but wonder about the discrepancy. Thanks.
 

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Richard Jemison
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7,379 Posts
Factory carb applications and jetting has been posted on the BB in several places. Do a search.
You are looking at a very minor difference in the jets you named. The difference is likely altitude application.
The 120 main and 50F11 is the one listed as factory fitted.
 

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Premium Member
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14,000 Posts
I agree with Richard. You may not notice the difference.
 

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Super Moderator
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10,599 Posts
Plus, with Weber jetting there is no such thing as "correct for a 1600 Duetto". Each car is specific, based on the type of fuel, altitude, cam timing, how much the head has been milled, etc. etc. At some point you need to experiment, ideally using a dyno and oxygen sensor.
 
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