78 400M 4bbl CFM
Thread Starter
|
New User
Joined: Jul 2009
Posts: 12
Likes: 0
78 400M 4bbl CFM
Hey guys, I have a 1978 F150 with a 400M in it. It currently has a 2bbl idk what CFM carb on it now, I want to swap it out for a holly 4bbl dubble pumper. My friend has a few of them and is going to give me one. He has a 700,800 and 1100 CFM carbs. I Was planning on getting the 700 cus i think its about right. I heard that my engine likes the 600 so i was wondering if the 700 might be too much for it. Will there be any problems with a 700 on my truck?
Certified Thread Hijacker
Joined: Aug 2001
Posts: 14,441
Likes: 60
You could take a 4 barrel and plug 3 of the bores and the 400 would still be overcarbed with the remaining 1 barrel.
No seriously, a Holley double pumper is a performance carb built for high horsepower, high revving engines and usually for lighter vehicles and stick shift.
Josh
No seriously, a Holley double pumper is a performance carb built for high horsepower, high revving engines and usually for lighter vehicles and stick shift.
Josh
Thread Starter
|
New User
Joined: Jul 2009
Posts: 12
Likes: 0
What would be the best Brand and CFM carb for performance. I heard quadrajets have a good difference in bore sizes. 2 small for economy and quick response and two hella bigger bores when you stomp it. Should I get one of them?
Certified Thread Hijacker
Joined: Aug 2001
Posts: 14,441
Likes: 60
Edelbrock Performer or the old school Carter AFB, no more than 600cfm.
Easy to tune and good drivability and economy.
Josh
Easy to tune and good drivability and economy.
Josh
Trending Topics
Fleet Mechanic
Joined: Feb 2004
Posts: 1,508
Likes: 332
From: Arlington,Wa
Carter 625
Works great on my set-up. I had an Edelbrock 750 on it for a weekend trip to the beach and I couldn't tell any difference performance or mileage wise. So I went back to the 625...and I get 10mpg no matter what Im doing....55 or 75mph, 10mpg.
FTE Stories
Ford Trucks for Ford Truck Enthusiasts
Top 10 Most Expensive Ford Trucks Ever Sold on Bring a Trailer
Joe Kucinski
2027 Ford Super Duty Buyer's Guide (Every Model, Engine, & Package)
Brett Foote
Top 10 Ford Truck Tragedies
Joe Kucinski
AEV FXL Super Duty - the Super Duty Raptor Ford Doesn't Make
Brett Foote
Lobo Vs Lobo: Proof the F-150 Lobo Should Be Even Lower!
Michael S. Palmer
Ford's 2001 Explorer Sportsman Concept Looks For a New Home
Verdad Gallardo
10 Best Ford Truck Engines We Miss the Most!
Joe Kucinski
2026 Shelby F-150 Off-Road: Better Than a Raptor R?
Brett Foote
2027 Super Duty Carhartt Package First Look: 12 Things You NEED to Know!
Michael S. Palmer
Thread
Thread Starter
Forum
Replies
Last Post
Eli1644
335 Series- 5.8/351M, 6.6/400, 351 Cleveland
9
Apr 27, 2015 04:31 PM
JUSTICE1736
1973 - 1979 F-100 & Larger F-Series Trucks
10
Apr 22, 2013 05:36 PM
