stock jetts?

66StangGuy · 06-15-2003, 02:44 PM

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.

Rev · 06-15-2003, 07:17 PM

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

hobgoblin351 · 06-16-2003, 06:22 PM

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.

PKRWUD · 06-17-2003, 03:52 AM

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

Rev · 06-18-2003, 10:11 PM

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

06-15-2003, 02:44 PM	#1
66StangGuy Registered Member Join Date: Feb 2002 Location: Diamond Bar Posts: 258	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. __________________ 66 mustang-292-Holley 4160-World Castings Windsor Sr.-Hooker super comp headers-MSD box & Coil.3.55 gears. B&M Z-Gate-Black leather racing seats with 4pt harnes.

06-15-2003, 07:17 PM	#2
Rev Registered Member Join Date: Nov 1998 Location: Houston, Tx. Posts: 3,887	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 __________________ '66 Coupe, 306, 350-375 HP, C-4, 13.07 e.t., 104.8 mph, 1/4 mi. O.B.C. #2 '66 coupe

06-16-2003, 06:22 PM	#3
hobgoblin351 Registered Member Join Date: Sep 2002 Location: NYC Posts: 245	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. __________________ 1970 Stang Conv: en:Boss351 (balanced/blueprinted) mech cam(240*@.050/.540 lift) Scrw in studs/comp cams rllr rkr Mldn valves 2.19in 1.71ex ported polished cc'd hrdnd ex Keith Black FT pistons(10.25/1) Weiand Excellorator manifold Holley700 DP mech 2nds MSD 6 box and Dis Headers/2 1/2 inch duels tr: modified FMX re:9-inch/3.89 limited slip

06-17-2003, 03:52 AM	#4
PKRWUD Junior Member Join Date: Mar 1999 Location: Ventura, California Posts: 8,981	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 __________________ Webmaster: Rice Haters Club Jim Porter Racing Peckerwoods Pit Stop Support Your Local RED & WHITE!

06-18-2003, 10:11 PM	#5
Rev Registered Member Join Date: Nov 1998 Location: Houston, Tx. Posts: 3,887	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 __________________ '66 Coupe, 306, 350-375 HP, C-4, 13.07 e.t., 104.8 mph, 1/4 mi. O.B.C. #2 '66 coupe

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