AFB help

Reply Subscribe

Thread Tools

Search this Thread

Nov 7, 2005 | 10:28 AM

DMB64

Thread Starter

8th Gear

Joined: May 2005

Posts: 8

Likes: 0

AFB help

I have a 64 300hp, pg, I bought rebuilt 3461s from Autozone"Champion", the vacume port is manifold vacume not ported vacume so the vacume advance is pulled all the time, when I step on the gas it retards I get a stumble and it will not idle down very well. The Champion tech guy said that AFB is not made to have ported vacume. What am I missing? Duane

Nov 7, 2005 | 11:02 AM

Bluestripe67

Race Director

Joined: Jan 2002

Posts: 15,342

Likes: 2,717

From: Close to DC

C2 of the Year Finalist - Modified 2020

Search this forum under "ignition timing" or ignition settings". You will find a wealth of imformation. In particular, your vacumn is supposed to be connected to the manifold. With this and the proper initial, and advance settings you will cruise very nicely.

Nov 7, 2005 | 11:02 AM

magicv8

Le Mans Master

Joined: Nov 2000

Posts: 7,246

Likes: 21

From: Going too fast over the hill. Iowa

Connect the vacuum advance to an intake manifold fitting.

Nov 7, 2005 | 11:54 AM

JohnZ

Team Owner

Joined: Oct 2000

Posts: 38,897

Likes: 1,926

From: Washington Michigan

Quote:

Originally Posted by DMB64

There was no such thing as "ported vacuum" in 1964 - your original setup had full manifold vacuum to the distributor, which is what you want. The "stumble" has nothing to do with the vacuum advance - that's a carb problem. Check the accelerator pump and idle mixture screw adjustment and set them properly and you should be in business; you can't just bolt on a rebuilt carb "out of the box" and expect it to operate properly without "tweaking" it for your combination.

Reply Subscribe

Reply Share

First
Prev
1 / 1
Next
Last

Forum Jump