header size
Pro
Joined: Sep 2003
Posts: 670
Likes: 1
From: charlotte nc
Most common available size is 1 3/4 but some companies offer 1 5/8. I have hear endless debate on the forum about this subject and I have concluded that in most cases it doesn't matter . For darn sure ,either size is far superior to the restricted mess that comes stock.
Race Director
Joined: Sep 2000
Posts: 17,298
Likes: 33
From: The Top of Utah
Mid to upper rpm power is increased by either. The reports are that the larger tubes, don't cost low end torque below what the stock exhaust provides. However, the smaller tubes will BOOST the low end with no sacrifice on the top. Do a search. There have been pages written on this subject.
RACE ON!!!
RACE ON!!!
Large Impressive Member
Joined: Jul 2003
Posts: 65,811
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From: Good health is merely the slowest possible rate at which one can die
St. Jude Donor '04-'05-'06-'07
Originally Posted by CFI-EFI
Mid to upper rpm power is increased by either. The reports are that the larger tubes, don't cost low end torque below what the stock exhaust provides. However, the smaller tubes will BOOST the low end with no sacrifice on the top. Do a search. There have been pages written on this subject.
RACE ON!!!
RACE ON!!!
Melting Slicks
Joined: Jun 2004
Posts: 3,032
Likes: 4
Originally Posted by 1996man
what about the 1 7/8 that exotic muscle offers?
I wonder if anyone ever read the warnings that come with 1 7/8" + headers that say 'for high horsepower engines only due to extreme loss of torque'
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Large Impressive Member
Joined: Jul 2003
Posts: 65,811
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From: Good health is merely the slowest possible rate at which one can die
St. Jude Donor '04-'05-'06-'07
Originally Posted by 1996man
what about the 1 7/8 that exotic muscle offers?
Originally Posted by mikey whipreck
I wonder if anyone ever read the warnings that come with 1 7/8" + headers that say 'for high horsepower engines only due to extreme loss of torque'
Race Director
Joined: May 2001
Posts: 14,165
Likes: 9
Originally Posted by mikey whipreck
I wonder if anyone ever read the warnings that come with 1 7/8" + headers that say 'for high horsepower engines only due to extreme loss of torque'
Race Director
Joined: Sep 2000
Posts: 17,298
Likes: 33
From: The Top of Utah
Originally Posted by Nathan Plemons
Funny, I've seen an LS1 go with 1 7/8 headers and not give up any low end................
Do the 1 7/8ths" provide any advantage over the popular, 1 3/4", or less so, 1 5/8ths"?
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Race Director
Joined: May 2001
Posts: 14,165
Likes: 9
Originally Posted by CFI-EFI
"Give up" can have more than one interpretation. Is not being less than stock, not giving up? Or is not getting all you could get, giving up?
Do the 1 7/8ths" provide any advantage over the popular, 1 3/4", or less so, 1 5/8ths"?
RACE ON!!!
Do the 1 7/8ths" provide any advantage over the popular, 1 3/4", or less so, 1 5/8ths"?
RACE ON!!!
Race Director
Joined: Sep 2000
Posts: 17,298
Likes: 33
From: The Top of Utah
Originally Posted by Nathan Plemons
In the particular case I was referring to, GIVE up would refer to losing torque at ANY point. The 1 7/8th headers made more power from 2000 RPM's and up at EVERY POINT on the dyno graph, to the tune of abotu 10 pounds of torque.
RACE ON!!!
Racer
Joined: Nov 2003
Posts: 335
Likes: 0
From: Converse Tx
Originally Posted by Corvette Kid NC
And, if memory serves, these are only offered for EXTREMELY high HP applications, in the 7 or 800 HP range. Please, for the love of God, let's not throw yet ANOTHER header size into these discussions!
