just got a holley 4160C for my b-day tonight, also a weiand xcelerator intake and a mallory kit to change my points to electronic...what kind of secondaries are on this particular carb, the box doesnt really say any specific details about it and neither does the paperwork...do you think this combo will make pretty good difference over the stock 2bbl?
Holley 4160C
- Thread starter nugget68
- Start date
LMan
Founding Member
what do you mean, 'what kind of sec'? Jets? Type?
what size carb?
whats the rest of your motor look like?
Are you getting the drift that your questions are vague?
what size carb?
whats the rest of your motor look like?
Are you getting the drift that your questions are vague?
2nd Mustang
Founding Member
Vacuum secondary Holley carbs have that round spring housing on the passenger rear side of the carb. Find your carb at their web site:
http://www.holley.com/categories.asp?division=Holley
Their tech support is very helpful also.
http://www.holley.com/categories.asp?division=Holley
Their tech support is very helpful also.
List 80457 is a stock replacement 600 cfm vacuum secondary 4 bbl carb for Fords. Bolt it on, adjust your timing to about 12 degrees BTDC, screw the idle mixture screws on either side of the main metering block all the way in ( just til they bottom out, do NOT force them), unscrew each 1-1/2 full turns. Adjust the idle speed screw til the throttle shaft is closed, then screw it back in till the throttle just barely opens. Crank the motor up. you want it to idle at about 600-700 rpms ( in gear if an automatic) to get this setting try the idle mixture screws. If those don't get it, then open the idle speed screw til it does. If, after doing this, if you'll try the idle mixture screws again and there's no response from them, you have the idle speed screw down too far and the throttle blades open to the point where the carb's in the transition circuit. Back off and start over. If the idle's too slow, advance the timing a bit (12+ degrees BTDC) too fast and you'll need to retard it some (-12degrees BTDC) Once you have the idle set, it's time to play with the secondary spring. I can tell you right now, that with the spring that's in there, the secondaries will not open till the motor's in a hard pull at around 4000-5000 rpms. Buy a secondary spring assortment pack. In there will be 7 different springs. Usually on a 289-302 the "purple" spring will let the motor pull the secondaries open about a second after you nail the throttle. When it does, you can "feel" them come on. With the lightest spring they'll come open almost instantly.
well, i got my intake and carb on and i switched my points to electronic. the carb still needs some tuning, but i would just mess it up so i am taking it to a guy to get everything tuned up...let me tell you though, it sounds like a different engine when you get on it. i cant imagine how good it will sound when i get some heads and headers...
Similar threads
