open longtubes

Reply Subscribe

Thread Tools

Search this Thread

Jul 26, 2007 | 10:19 PM

92lt1vet

Thread Starter

Pro

Joined: Nov 2005

Posts: 679

Likes: 1

From: quakertown Pa

open longtubes

would it be ok to track my 92 lt1 vet with open longtubes? or would it run better with the borla and the x pipe? thanks mike

Jul 26, 2007 | 10:57 PM

STL94LT1

Race Director

Joined: Jan 2002

Posts: 12,261

Likes: 85

From: O'Fallon Missouri

You'll need the car tuned for open headers. I would just stick to the x-pipe and cat back.

Jul 26, 2007 | 11:03 PM

all show and more go

Pro

Joined: Aug 2006

Posts: 682

Likes: 1

From: SpringHill florida

Quote:

Originally Posted by STL94LT1

You'll need the car tuned for open headers. I would just stick to the x-pipe and cat back.

Jul 27, 2007 | 12:18 PM

rickneworleansla

Le Mans Master

Joined: Aug 2004

Posts: 5,141

Likes: 7

From: Metairie Louisiana

Quote:

Originally Posted by 92lt1vet

would it be ok to track my 92 lt1 vet with open longtubes? or would it run better with the borla and the x pipe? thanks mike

People do it with exhaust cutouts so I don't see why not. Do you mean ending the exhaust at the back of the headers? Messing with O2's you would need a tune. If any air comes in from the back it could cause it to run rich. Exhaust heat may be an issue also.

Last edited by rickneworleansla; Jul 27, 2007 at 12:21 PM.

Jul 27, 2007 | 08:46 PM

92lt1vet

Thread Starter

Pro

Joined: Nov 2005

Posts: 679

Likes: 1

From: quakertown Pa

yes rick its going to be just open headers no exhaust at all

Jul 27, 2007 | 08:54 PM

Scott-89

Burning Brakes

Joined: Aug 2005

Posts: 1,239

Likes: 0

From: North Central Indiana

I'm not sure how it would affect the O2 sensor/s. I would at least have some turn-downs put on it to direct the heat towards the ground.

Jul 27, 2007 | 09:00 PM

Ruby6spd

Melting Slicks

Joined: Apr 2001

Posts: 2,877

Likes: 7

You can but I'm not sure you will want to drive around like that. I had to drive mine to the exhaust shop that way and it was LOUD. Now I like loud exhausts but there is now way you could function on the street everyday like this. Race track is a different story

Like the others have said it is like running the cut outs

Oh, I did I mention the smell? Running a full exhaust sans the cats will give you some strong odor. If you run open headers the inside of the car is going to smell like a gas can!!

Jul 27, 2007 | 09:28 PM

rodj

Le Mans Master

Joined: Aug 2000

Posts: 8,838

Likes: 31

From: Australia

Quote:

Originally Posted by rickreeves1

I'm in a similar situation
For my drag only car was going to remake the LT's where they neck down to 2.5" and build a true 3" collector 12 -14" long.
Is that going to be long enough to prevent O2 errors from dilution at idle?
Alternative is to extend 3" pipe all the way to turn down at rear of trans.