is there any gain in headers vs manifolds in the 600-700hp range
09-23-2017, 07:37 AM
#23
I think a lot of people here are missing the point of what OP was trying to figure out.
Is there power to be made in the 6-700hp range by using headers over manifolds? Of course. Headers flow better than manifolds. Which is why on every NA build it's one of the first real mods.
Headers aren't a necessity. Plenty of people run manifolds with great success. On a forced induction car you can always make up for short comings or parts that aren't optimal by forcing more air down its throat. However logic says that better flowing exhaust is lesss restrictive and more efficient which will make more power.95% of guys that go turbo will never get to a point where they can't make more power because the manifolds are maxed. There however probably are a handful of guys that would see noticeable power gains by going to a header set up. Personally I have a set of stainless works headers. They have big primaries and a 3" collector. Now that is a massive collector that is too large. That pic is of my old merge pipe. My new merge pipe has a similar design however in the piping on each side as it turns down and merges it goes from 3-2 3/4- 2 1/2- 2/14-2. Which is a great size for a T4 turbo. Those gradual steps keep turbulence low and really speeds up the velocity. While still capitalizing on the very high power making stainless works headers.
Is there power to be made in the 6-700hp range by using headers over manifolds? Of course. Headers flow better than manifolds. Which is why on every NA build it's one of the first real mods.
Headers aren't a necessity. Plenty of people run manifolds with great success. On a forced induction car you can always make up for short comings or parts that aren't optimal by forcing more air down its throat. However logic says that better flowing exhaust is lesss restrictive and more efficient which will make more power.95% of guys that go turbo will never get to a point where they can't make more power because the manifolds are maxed. There however probably are a handful of guys that would see noticeable power gains by going to a header set up. Personally I have a set of stainless works headers. They have big primaries and a 3" collector. Now that is a massive collector that is too large. That pic is of my old merge pipe. My new merge pipe has a similar design however in the piping on each side as it turns down and merges it goes from 3-2 3/4- 2 1/2- 2/14-2. Which is a great size for a T4 turbo. Those gradual steps keep turbulence low and really speeds up the velocity. While still capitalizing on the very high power making stainless works headers.