Long Tube gains?
Thread Starter
Instructor
Joined: Aug 2003
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From: Mitchell, Indiana
Long Tube gains?
I was wondering what kind of quarter mile et and mph gains I would see if I put Long tube headers, removed my cats, and put an x pipe in place of the resonator? It is a basically stock LT1 and I have the mufflers removed and a Hypertech Programmer.
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From: Athens AL
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About 15hp from the headers, a couple more from removing the cats. LT1 cats are already pretty good.
That corresponds to around .1-.2
That corresponds to around .1-.2
Race Director
Joined: Sep 2000
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From: The Top of Utah
You will see a greater 1/4 mile improvement with 1 5/8ths" tube headers, over the larger tubed headers. Especially if you can get the tires to hook up. The smaller tubes will give you more low and mid range grunt, with no sacrifice at the top end.
RACE ON!!!
RACE ON!!!
Le Mans Master
Joined: Apr 2000
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From: Manassas VA
Originally Posted by 95_6spdvette
I was wondering what kind of quarter mile et and mph gains I would see if I put Long tube headers, removed my cats, and put an x pipe in place of the resonator? It is a basically stock LT1 and I have the mufflers removed and a Hypertech Programmer.
I believe that Nathan has header results on his web page. (dyno anyways) I believe his was done after running a flowmaster system and the hotcam. He then installed the long tube headers. I do believe with no cats, x pipe and no mufflers that thing will be LOUD.
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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
You will see a greater 1/4 mile improvement with 1 5/8ths" tube headers, over the larger tubed headers. Especially if you can get the tires to hook up. The smaller tubes will give you more low and mid range grunt, with no sacrifice at the top end.
RACE ON!!!
RACE ON!!!
Definitely the way to go with all but heavily modified engines. Stainless Works makes a nice one and in the Hedman Elite series, not to be confused with their cheaper headers, makes a nice coated one (outside only) w/ 3/8" flanges and heavier pipe for a little over $300 from Summit. Bad news, there's about a two month wait right now.
Burning Brakes
Joined: Aug 2000
Posts: 984
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From: Cincinnati OH
Originally Posted by FoolCrzy
My buddy Vince Ivanc gained, I think 15 or 16 RWHP with longtubes on his modded 92lt1.
May be different for a completely stock motor, not sure...
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Melting Slicks
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From: What did the 5 fingers say to the face? SLAP!!
Originally Posted by CFI-EFI
You will see a greater 1/4 mile improvement with 1 5/8ths" tube headers, over the larger tubed headers. Especially if you can get the tires to hook up. The smaller tubes will give you more low and mid range grunt, with no sacrifice at the top end.
RACE ON!!!
RACE ON!!!
I disagree. No matter what combination you plug into Desktop Dyno, the larger headers always show a gain at every rpm level.
Large Impressive Member
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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 flyersfan1088
I disagree. No matter what combination you plug into Desktop Dyno, the larger headers always show a gain at every rpm level.
Team Owner
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From: I'm the walkin dude I can see all of the world...
St. Jude Donor '03
Originally Posted by flyersfan1088
I disagree. No matter what combination you plug into Desktop Dyno, the larger headers always show a gain at every rpm level.
No, CFI-EFI is right about the 1 5/8ths. They are definitly the optimum Header for these cars. Problem is they are tough to find in affordable quality. That being said there is still an excellent gain coming from the 1 3/4 LT's. It has to do with producing more torque.
Race Director
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Originally Posted by VictorRussell'92
No, CFI-EFI is right about the 1 5/8ths. They are definitly the optimum Header for these cars. Problem is they are tough to find in affordable quality. That being said there is still an excellent gain coming from the 1 3/4 LT's. It has to do with producing more torque.
Very interesting thing that. A good friend of mine did back to back dyno runs on a heads / cam LS1 car, he went from 1 3/4" headers to 1 7/8" headers and picked up power clear across the board with no loss in low end. Just some more fuel for the fire.
Melting Slicks
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From: Drive it Like You Hate it Cincinnati OH
Wasn't there a post a while back regarding this header size question? As I recall, it was from a magazine. They tested 1 5/8" , 1 3/4" and 1 7/8", and, I think, showed no major differences.
Team Owner
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From: I'm the walkin dude I can see all of the world...
St. Jude Donor '03
Originally Posted by Nathan Plemons
Very interesting thing that. A good friend of mine did back to back dyno runs on a heads / cam LS1 car, he went from 1 3/4" headers to 1 7/8" headers and picked up power clear across the board with no loss in low end. Just some more fuel for the fire.
Race Director
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From: The Top of Utah
Originally Posted by flyersfan1088
I disagree. No matter what combination you plug into Desktop Dyno, the larger headers always show a gain at every rpm level.
Originally Posted by FoolCrzy
Wasn't there a post a while back regarding this header size question? As I recall, it was from a magazine. They tested 1 5/8" , 1 3/4" and 1 7/8", and, I think, showed no major differences.
RACE ON!!!