new intake manifold or headers?
Thread Starter
|
Freshman User
Joined: Sep 2004
Posts: 25
Likes: 0
new intake manifold or headers?
I would like to know if the stock intake is any good on a 74 460? I want to know which would improve the HP more. A new intake or headers? I can't afford both right now.
Senior User
Joined: Aug 2004
Posts: 368
Likes: 0
From: Las Vegas, Nevada
What are you trying to achieve, low rpm torque or high rpm horsepower? The stock manifold is a dual plenum design which is optimized to give torque in the low rpm range. It does this by splitting the barrels of your carb up between the 8 cylinders, giving 4 cylinders to each primary barrel in an alternating manner, first one, then the other. this keeps the air/fuel velocity high at low rpm's which improves drivability and responsiveness. Most of your "high performance" intake manifolds are of the single plenum design, although there are exceptions. These manifolds have one large plenum that the carb "dumps" into. The top end breathing is much improved, but they kill your low end torque to a degree.
Headers on the other hand help to scavenge the exhaust out of the cylinder and provide an increase in performance on the low and high rpm scales, as well as increase mpg and everything else good!
Headers on the other hand help to scavenge the exhaust out of the cylinder and provide an increase in performance on the low and high rpm scales, as well as increase mpg and everything else good!
Thread
Thread Starter
Forum
Replies
Last Post
Usaallday
Big Block V8 - 385 Series (6.1/370, 7.0/429, 7.5/460)
1
Dec 8, 2013 10:06 PM
4x4bigblock
Big Block V8 - 385 Series (6.1/370, 7.0/429, 7.5/460)
12
Mar 7, 2006 07:54 PM
Big Block Man 2
Big Block V8 - 385 Series (6.1/370, 7.0/429, 7.5/460)
6
Feb 10, 2004 02:42 PM
