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Idle Jet for Weber DFEV, DFAV (Progressive) & 40 IDA 3bbl, 74403
Idle Jet for Weber DFEV, DFAV (Progressive) & 40 IDA 3bbl, 74403


 
Idle Jet for Weber DFEV, DFAV (Progressive) & 40 IDA 3bbl, 74403 are ORIGINAL WEBER JETS FROM ITALY, we do not carry Chinese reproductions (whch do not flow properly!). These are all genuine Weber jets which have been flow tested at the factory! Typically you'll need a 45-50 primary idle jet, and a 55-60 secondary idle jet.
Price: $8.00
Item eligible for Econo/1st Class Mail shipment, min ship charge applies

: 74403

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Overview
 
Idle Jet for Weber DFEV, DFAV (Progressive) & 40 IDA 3bbl, 74403 are ORIGINAL WEBER JETS FROM ITALY, we do not carry Chinese reproductions (whch do not flow properly!). These are all genuine Weber jets which have been flow tested at the factory!
Item Features
We are aware that we are a little more expensive than other suppliers of Weber jets, but here is why you should use Aircooled.Net. First, we only sell genuine Weber jets from Italy! Secondly, we will tell you the correct jet sizes to minimize your jet expense, and your valuable time tuning! Other shops that aren't proficient at Weber Tuning will be happy to sell you jets at $4 ea, and you'll wind up with 6 sizes (24 jets) that you don't need! That makes no sense! By buying from us you will not spend more than you have to, our experience will keep your costs down, while providing the highest quality parts.

With that out of the way, we recommend the following idle jet sizes for sea level driving for the Weber Progressive

Primary/Secondary

45/60 Idle

125-130/170-180

160/180

Drop the size "1" for every 1k' rise above sea level. So if you have a Progressive in Denver (5k') you'd need Pri/Sec idle jets of 40/55, but the same carbs at sea level would use 45-60.

Despite what you have read in "other" places, these sizes will result in the best running (cool) and stelr MPG. Use the main circuit for your power tuning! Read our tuning guide for further tuning tips, you'll save a fortune by buying the jets you need ONCE without guesswork!


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