1 7/8th headers on a LS6?
Former Vendor
Joined: Nov 2005
Posts: 8,995
Likes: 2
From: Spring Texas
St. Jude Donor '08
unless you're FI, Big Cubes or a massive H/C, a smaller diamater primary will do you better for low end torque.
remember the smaller the diamater of the tube, the faster a given volume of air moves through the tub under a given pressure.
this does 2 things:
1) faster moving air creates a larger low pressure wake behind pulses that will pull gases from the other primaries at the collector
2) The less air you have in your exhaust system at any given time, the less effort the engine has to expend pushing the exhaust out. a larger diamater system will always have more exhaust gases in the tubes than a smaller one.
To maximize your performance you must match your performance components to eachother.
remember the smaller the diamater of the tube, the faster a given volume of air moves through the tub under a given pressure.
this does 2 things:
1) faster moving air creates a larger low pressure wake behind pulses that will pull gases from the other primaries at the collector
2) The less air you have in your exhaust system at any given time, the less effort the engine has to expend pushing the exhaust out. a larger diamater system will always have more exhaust gases in the tubes than a smaller one.
To maximize your performance you must match your performance components to eachother.
Race Director
Joined: Mar 2001
Posts: 11,405
Likes: 26
From: Whippany NJ
CI 6-7-8-9 Veteran
St. Jude Donor '08-'09
NCM Sinkhole Donor
unless you're FI, Big Cubes or a massive H/C, a smaller diamater primary will do you better for low end torque.
remember the smaller the diamater of the tube, the faster a given volume of air moves through the tub under a given pressure.
this does 2 things:
1) faster moving air creates a larger low pressure wake behind pulses that will pull gases from the other primaries at the collector
2) The less air you have in your exhaust system at any given time, the less effort the engine has to expend pushing the exhaust out. a larger diamater system will always have more exhaust gases in the tubes than a smaller one.
To maximize your performance you must match your performance components to eachother.
remember the smaller the diamater of the tube, the faster a given volume of air moves through the tub under a given pressure.
this does 2 things:
1) faster moving air creates a larger low pressure wake behind pulses that will pull gases from the other primaries at the collector
2) The less air you have in your exhaust system at any given time, the less effort the engine has to expend pushing the exhaust out. a larger diamater system will always have more exhaust gases in the tubes than a smaller one.
To maximize your performance you must match your performance components to eachother.
Safety Car
Joined: Dec 2003
Posts: 4,073
Likes: 1
From: Sarver Pennsylvania
unless you're FI, Big Cubes or a massive H/C, a smaller diamater primary will do you better for low end torque.
remember the smaller the diamater of the tube, the faster a given volume of air moves through the tub under a given pressure.
this does 2 things:
1) faster moving air creates a larger low pressure wake behind pulses that will pull gases from the other primaries at the collector
2) The less air you have in your exhaust system at any given time, the less effort the engine has to expend pushing the exhaust out. a larger diamater system will always have more exhaust gases in the tubes than a smaller one.
To maximize your performance you must match your performance components to eachother.
remember the smaller the diamater of the tube, the faster a given volume of air moves through the tub under a given pressure.
this does 2 things:
1) faster moving air creates a larger low pressure wake behind pulses that will pull gases from the other primaries at the collector
2) The less air you have in your exhaust system at any given time, the less effort the engine has to expend pushing the exhaust out. a larger diamater system will always have more exhaust gases in the tubes than a smaller one.
To maximize your performance you must match your performance components to eachother.
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Life Time NCM #2196
Joined: Sep 2004
Posts: 82,596
Likes: 1,711
From: Converse TX
I happen to have 1 7/8 AR with my blower setup and my little ole 347 puts down a mere 772 RWHP, so I would do the larger tube ones if you plan on a blower, seems to work well for me
Burning Brakes
Joined: Aug 2008
Posts: 887
Likes: 8
From: North Plainfield New Jersey
damn, just when I start assembling my shopping list, things like this pop up and make me second think things.
I plan on staying 346 cubes (at least for now, lol), but am doing a full FAST 92/92 h/c over this winter. I was going to do 1 3/4, but now 1 7/8 is looking kinda nice. Any advice?
I plan on staying 346 cubes (at least for now, lol), but am doing a full FAST 92/92 h/c over this winter. I was going to do 1 3/4, but now 1 7/8 is looking kinda nice. Any advice?
Former Vendor
Joined: Nov 2005
Posts: 8,995
Likes: 2
From: Spring Texas
St. Jude Donor '08
damn, just when I start assembling my shopping list, things like this pop up and make me second think things.
I plan on staying 346 cubes (at least for now, lol), but am doing a full FAST 92/92 h/c over this winter. I was going to do 1 3/4, but now 1 7/8 is looking kinda nice. Any advice?
I plan on staying 346 cubes (at least for now, lol), but am doing a full FAST 92/92 h/c over this winter. I was going to do 1 3/4, but now 1 7/8 is looking kinda nice. Any advice?
