Thread: Trying to rejet my edelbrock 600 cfm

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Get a copy of the Edelbrock IB for that carb and do your recalibration by their chart - the shotgun approach doesn't always work and with these carbs, the smallest jets without the corresponding rods wont help any engine. As far as numbers on those jets - find a magnifying glass - they are there, just very difficult to see(they probably are 1428/.100 for a 1405 carb and 1427/.098 for a 1406 ). You also may need to clean the green oxidation off - numbers are on the top side. Here's the manual: http://www.edelbrock.com/automotive_...406_manual.pdf

This is all that's inside - a 1405 w/electric choke added to it:

Oh and don't forget the springs under the rod pistons - they too need to correspond to any changes in jets and rods as well as where the accelerator pump link is assembled