Need help...headers...
Thread Starter
Burning Brakes
Joined: Feb 2007
Posts: 1,037
Likes: 0
From: Kansas City Missouri
St. Jude Donor '09
Need help...headers...
Okay I know the header topic has been beat to death but was having trouble searching for anything related to me. Here is the skinny...
I have a 408 and next week sometime I will finally be installing my TFS 225 heads with custom cam. I currently have a ported FAST 92/92 as well. Right now I am running ARH 1 3/4 headers through a catted 2.5" xpipe and 2.5" Corsa exhaust. What benefit would I see out of going to a 1 7/8 headers with full 3" catted xpipe and 3" exhaust?
Car is 99% street driven by the way and I already have a 3.90 rear diff and Z06 ratio transmission so down low is already there.
Thanks for the help,
Kevin
I have a 408 and next week sometime I will finally be installing my TFS 225 heads with custom cam. I currently have a ported FAST 92/92 as well. Right now I am running ARH 1 3/4 headers through a catted 2.5" xpipe and 2.5" Corsa exhaust. What benefit would I see out of going to a 1 7/8 headers with full 3" catted xpipe and 3" exhaust?
Car is 99% street driven by the way and I already have a 3.90 rear diff and Z06 ratio transmission so down low is already there.
Thanks for the help,
Kevin
Temporary Hold
Joined: Aug 2006
Posts: 7,711
Likes: 7
From: www.modular-concept.com www.flatoutimaging.com
Okay I know the header topic has been beat to death but was having trouble searching for anything related to me. Here is the skinny...
I have a 408 and next week sometime I will finally be installing my TFS 225 heads with custom cam. I currently have a ported FAST 92/92 as well. Right now I am running ARH 1 3/4 headers through a catted 2.5" xpipe and 2.5" Corsa exhaust. What benefit would I see out of going to a 1 7/8 headers with full 3" catted xpipe and 3" exhaust?
Car is 99% street driven by the way and I already have a 3.90 rear diff and Z06 ratio transmission so down low is already there.
Thanks for the help,
Kevin
I have a 408 and next week sometime I will finally be installing my TFS 225 heads with custom cam. I currently have a ported FAST 92/92 as well. Right now I am running ARH 1 3/4 headers through a catted 2.5" xpipe and 2.5" Corsa exhaust. What benefit would I see out of going to a 1 7/8 headers with full 3" catted xpipe and 3" exhaust?
Car is 99% street driven by the way and I already have a 3.90 rear diff and Z06 ratio transmission so down low is already there.
Thanks for the help,
Kevin
Not sure how much MORE you would see all we ever hear is that the bigger primaries should be used on the bigger motors, so with that logic I would think you would see some gains. How much I don't know, maybe another 10-20rwhp over the old set?
Maybe give the guys at ECS a call? They could probably tell you what they have actually seen on a dyno.
Good luck Buddy!
Andy
Thread Starter
Burning Brakes
Joined: Feb 2007
Posts: 1,037
Likes: 0
From: Kansas City Missouri
St. Jude Donor '09
Ya that seems to be the theory on this. But whats funny is if you search this topic you get 50 different answers all with 50 different results. Which only leads me to assume there is no golden rule on primary diameter or length as a general but more or less application based. And I don't want this thread to add onto the countless hundreds of header war threads already on the forum just would like to see if anyone has had any similar experiences with bigger cubes.
Temporary Hold
Joined: Aug 2006
Posts: 7,711
Likes: 7
From: www.modular-concept.com www.flatoutimaging.com
Ya that seems to be the theory on this. But whats funny is if you search this topic you get 50 different answers all with 50 different results. Which only leads me to assume there is no golden rule on primary diameter or length as a general but more or less application based. And I don't want this thread to add onto the countless hundreds of header war threads already on the forum just would like to see if anyone has had any similar experiences with bigger cubes.
Andy
Thread Starter
Burning Brakes
Joined: Feb 2007
Posts: 1,037
Likes: 0
From: Kansas City Missouri
St. Jude Donor '09
I knew that the day I ordered my first go fast part. Yet I keep screwing myself 
Maybe secretly I was hoping someone would come on here and say NO don't change your headers and exhaust yours is perfect. But we all know that is not going to happen
Maybe secretly I was hoping someone would come on here and say NO don't change your headers and exhaust yours is perfect. But we all know that is not going to happen
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