stock jetts?
 

anyone know what the stock jet sizes are for a holley 4160. 4bbl vaccume secondaries auto choke. any ideas.. trying to go up in jet sizes cuz plugs are really white like im in a lean condition. i checked holley but cant find it.

4160
 

I had one for awhile. Mine came with #66 jets primary and I think the secondary plate orifices were also #66. Fooled around alot with it and gained some performance by trial and error. The great thing about Holleys and Demons is that all the tuning parts are available at O'Reilly's or other auto supply outlets and even open Sundays. Get the Holley red book and maybe another one on tuning Holleys. That's my advice anyway.

Rev

you didn't give the carb size, 4160 is the model. The jets on a 600 will differ from those on a 750. You have to get the number off of the air horn to really be sure what you've got.

Exactly. Post the List number (ie: L-1850-3) that you'll find on the front of the airhorn, and we can tell you the exact jets it came with. Even carbs that flow the same (same "size") don't always have the same size jets. The List number is the only way to know what it came with.

Take care,
~Chris

304?
 

With a 304CID, I'm just guessing that he has a 600CFM vac secondary 4160. Probably the 1850 that was mentioned. Mine had #66 primaries and I think #66 secondary plate orifices. Check the primary jets that are there (10 minutes procedure). I'll bet the secondaries are the same #.

Rev