Carb tuneing
Thread Starter
|
Freshman User
Joined: Apr 2012
Posts: 36
Likes: 0
Carb tuneing
I had a edelbrock 750 cfm carb sitting on a bored and cammed ford 400. When i try to adjust the mixture i can screw both of the mixture screws in all the way and the truck will just sit there and run? I cant get the damn thing tuned and i was wondering if that might be to big of a carb and that's what causing this? Any ideas?
Cargo Master
Joined: Oct 2011
Posts: 2,245
Likes: 302
From: Kenner,La.
Edelbrock
B93, Have you ever hooked up a vacuum gauge to your engine? If it is between5- 8 inches it is too low. If your cam has too much overlap that is one of the symptoms. You can try calling Edelbrock's Technical service and let them know which cam,intake manifold,timing,exhaust and whether it is manual or automatic along with the converter if equipped. If the manifold vacuum is too low it is causing the power valve springs to raise up the metering rods and dump more fuel into the manifold. That is why you can close the idle metering screws. Good luck, Kenny
Post Fiend
Joined: Apr 2008
Posts: 8,261
Likes: 15
From: Big Sky Country
X2....for a proper tune a vacuum gauge is a must have tool IMO
Classic Inlines - Tuning with a Vacuum Gage
Classic Inlines - Tuning with a Vacuum Gage
Thread
Thread Starter
Forum
Replies
Last Post
DirtyLarry
1973 - 1979 F-100 & Larger F-Series Trucks
6
May 23, 2018 12:11 AM
Montag
1980 - 1986 Bullnose F100, F150 & Larger F-Series Trucks
7
Jan 12, 2018 07:20 AM
Dance-Trax
1973 - 1979 F-100 & Larger F-Series Trucks
17
Jan 24, 2010 12:26 PM
DutchmanAZ
1973 - 1979 F-100 & Larger F-Series Trucks
4
Oct 5, 2007 10:05 PM
