Holley has two carb series that are similar to each other, the 4150 and the 4160. The double pumpers you can tell in that they don't have the stinkin' transfer tube from the front fuel bowl to the rear... unless the car was modified.
There are double pumpers and vac advance secondary carbs. Double pumpers open their secondaries using mechanical linkage. It is fast and responsive, but uses bunches of gas. vac advance use the vacume of the engine to open the secondaries. There is a slight delay when you stomp the gas, but without your foot down the secondaries close off giving you much better gas milage.
No! They are for a car with a big cam, a 4-speed, and a some
gears. We use a 600 DP on our '65 coup track car. It has a
351 Cleveland, Toploader, and 3.50 Detroit locker. They do
nothing for a car with a auto. What are you working on? Most
of the time less is more! My wife drives a '61 Ranchero with a
450 holley and it runs great!. We just ran a friend of ours with a
427 '66 Fairlane and got him from one stop light to the other.
If we where on the highway he would of pulled us but in a short
run we got it.
To big of carb, or to big of a cam, can make nice car real slow.
And a real drag to drive.
Yes. You will be very happy with the 600 vac. We have the same
intake on our Ranchero and some of the other cars we own (13).
It is a good intake and with the 600 you will not overload the
motor with a "to big of carb" set up that I see all to often. If
my wifes Ranchero had a auto., I would put a 600 vac. on it.
I did not learn form other people. On my first car I put a 850 DP.
I thought more is better, !~!??- I have learned from my mistakes.
I wish VMF was around when I was looking for the right thing to do.
You can learn in one week on VMF what it took the old timers a year
to learn in the day's of "no internet". Just to hold something in my hand
and to keep up my ego I still get 6 magazines each month. I know I can
get the info on the net. but I have to have something to read while I am
in the bathroom. Keep the questions coming, that's the only way to
Do you want to know how to hook it up? VMF has a lot of info
on holley's. I will be happy to help. I'm not on the comp. all the time
but if you need help with anything just ask, private or on forum.
You can go to Holley.com to find out more about the carb.
Summit will give you the best price on a new one. You can get
a free catalog by calling 1-800-230-3030.
Check out Carcraft.com., Turnfast.com, Norcal-saac.org.
Lots of info. I like road racing, not so much drag racing.
There is a lot of stuff out there if you look hard enough.
I will be happy to help all I can.