Holley Jetting
Senior User
Joined: Aug 2003
Posts: 152
Likes: 0
From: Maple Ridge BC Canada
Check out this website. It gives the stock jetting for holley carbs. They are usually pretty close stock..71's are huge for that application..I run 66 primary and 72 secondary on my 390...Too rich and it will really shorten engine life..Somtimes you need to be that rich to compensate for a really wild cam.. http://www.mortec.com/carbs.htm
Post Fiend
Joined: Oct 2003
Posts: 9,176
Likes: 4
From: Western Central NV
What alittude are you ? I run a 4160 Holley 600CFM and it came out of the box with .064 primary. I run .622 Maxi-Jets and could run .612s. I run at 5500 ft. This Holley is on a 460 with an Edelbrock, I run a Blk secondary spring with a quick change secondary housing. I run a Cloyes TRUE Street roller chain set ADV 4 degrees beyond TDC. You should easily beable to run .061s. I haven't played with the secondary side because towing if I need the secondaies I need the gas for power.
Thread
Thread Starter
Forum
Replies
Last Post
F-250 WARHORSE
1973 - 1979 F-100 & Larger F-Series Trucks
3
Mar 21, 2017 10:44 PM
chillman88
1980 - 1986 Bullnose F100, F150 & Larger F-Series Trucks
11
Apr 28, 2015 04:37 AM
Tedster9
1961 - 1966 F-100 & Larger F-Series Trucks
10
Jan 27, 2015 10:28 AM
debestuss
FE & FT Big Block V8 (332, 352, 360, 390, 406, 410, 427, 428)
10
Jul 25, 2004 05:49 PM
MuchToMyDelight
Fuel Injection, Carburetion & Fuel System
7
Sep 28, 2003 10:01 AM
