Distributor advance
Thread Starter
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Senior User
Joined: Jun 2001
Posts: 200
Likes: 0
From: Davis, CA
Distributor advance
Does anyone know what the full advance is supposed to be at when the throttle's down, at about 2500 rpm. Mine's at 26 without the vacuum connection on a 79 f250 with a 400. I thought it was supposed to be at about 20 or something. Also, does anyone know how to fix this?? Thanks
Lead Driver
Joined: Nov 2000
Posts: 6,652
Likes: 353
From: Albuquerque
Distributor advance
You may not get full centrifical advance untill 3,500 depending on the distributor. With no vacuum advance hooked up I like to see 40 degrees by 3,000 on a 400. They don't have a lot of compression stock so they like the advance. I've always used more intial setting to get more total.
1977 Ford F-100
400m/c6/4:11/Gear Vender O.D.
Crane hydralic roller, forged, ported polished,Deamon,Edlebrock, yada, yada, yada
280,000 miles
Stock on the outside
modified/rebuilt everything
1977 Ford F-100
400m/c6/4:11/Gear Vender O.D.
Crane hydralic roller, forged, ported polished,Deamon,Edlebrock, yada, yada, yada
280,000 miles
Stock on the outside
modified/rebuilt everything
Thread Starter
|
Senior User
Joined: Jun 2001
Posts: 200
Likes: 0
From: Davis, CA
Distributor advance
Well, I'm stumped then, because I thought that was why I was running high hydrocarbons at 2500 rpm. I thought maybe the advance was too much. Could it be too little of an advance?? maybe?I can't really think ofwhat else i could be.
Lead Driver
Joined: Nov 2000
Posts: 6,652
Likes: 353
From: Albuquerque
Distributor advance
my best guess is you are running too little initial timing. For emmission you should determine the factory setting at idle without the vacuum. Maybe about 10? Then connect the vacuum and make sure it bumps it up another 6 degrees or so. Then at 3,000 you should have at around 35. Don't increase it past stock if you are trying to pass emmissions.
1977 Ford F-100
400m/c6/4:11/Gear Vender O.D.
Crane hydralic roller, forged, ported polished,Deamon,Edlebrock, yada, yada, yada
280,000 miles
Stock on the outside
modified/rebuilt everything
1977 Ford F-100
400m/c6/4:11/Gear Vender O.D.
Crane hydralic roller, forged, ported polished,Deamon,Edlebrock, yada, yada, yada
280,000 miles
Stock on the outside
modified/rebuilt everything
1983, 23l, 400, 66, advance, carburetor, connection, distibutor, distributor, ford, hydrocarbon, ranger, vacuum
