Long tube or shorties?
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Joined: Sep 2004
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From: Clarksville,Tn
Long tube or shorties? Can somebody tell me why long tube headers are better than shorties as far as power gains go? Soon as I get my car back from the mechanic I'm planning on putting true duals on it.
Another question........what do you do to the computer when you dual it and have no cats and can you do away with the O2 sensors? I really know nothing about the computer side of these cars, I'm old school I guess you could say.
Can't wait to get my car back with the new gears in it, of course I have to take it to the track and see what it'll run. Last weekend it ran consistent 9:20's, way slow from the 8's it use to run but I forgot I put the 18" wheels and tires on so that has hurt me quite a bit.
Another question........what do you do to the computer when you dual it and have no cats and can you do away with the O2 sensors? I really know nothing about the computer side of these cars, I'm old school I guess you could say.
Can't wait to get my car back with the new gears in it, of course I have to take it to the track and see what it'll run. Last weekend it ran consistent 9:20's, way slow from the 8's it use to run but I forgot I put the 18" wheels and tires on so that has hurt me quite a bit.
This Car Craft article shows the differences between LTs and shorties as well as varying tube diameters.
http://www.carcraft.com/techarticles...st/index1.html
http://www.carcraft.com/techarticles...st/index1.html
Thread Starter
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From: Clarksville,Tn
Thanks for the link, it was informative. According to this article the longer tube headers put the torque curve in the "street" range which is what I want since this is a daily driver. No ground clearance problems with these? I also want a TRUE dual out the back of the car. I saw some of these corvette duals where the muffler looks like it's the same size as the pipe, anybody ever heard these and what do they sound like? I looked at the ls1sounds.com site and didn't see any of these.
Joined: Nov 2001
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From: LT1 land...the "409" of the 90s!
LOL.
here is the deal. if you want a low car or to drive over bumps get shorties.
If you want every last bit of power(Say extra 10RWHP) then get the Long tubes
O2s are a needed evil
here is the deal. if you want a low car or to drive over bumps get shorties.
If you want every last bit of power(Say extra 10RWHP) then get the Long tubes
O2s are a needed evil
Thread Starter
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From: Clarksville,Tn
Again, I see pics of aftermarket and custom exhaust with no O2 sensors. Yes they have them on the headers but not midway where the cat use to be. Please explain how if you need them then how are they getting by without them?? Am I missing something here?? Are these LS1 exhausts I'm looking at and they don't have O2 sensors in the back? Remember I'm old school and know just a lil about computer cars. LOL
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Originally Posted by fastsspr
Go all the way with LT they give you more top end power.You can't eliminate the o2 sensors,the computer adjust the fuel misture using the info from the o2 sensors.
On The Tree
Joined: Nov 2003
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From: South Jersey
Originally Posted by speedluv
Again, I see pics of aftermarket and custom exhaust with no O2 sensors. Yes they have them on the headers but not midway where the cat use to be. Please explain how if you need them then how are they getting by without them?? Am I missing something here?? Are these LS1 exhausts I'm looking at and they don't have O2 sensors in the back? Remember I'm old school and know just a lil about computer cars. LOL
Rich
Originally Posted by 94Formula/TA
I believe only OBDII cars have 2 sets of O2's one before the cat and one after. If you want to run OBD2 you can eliminate the second set of O2's and get sims.
Rich
Rich
Staging Lane
Joined: Feb 2003
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From: Mesa, Az
Originally Posted by BRETTINATOR
what he said, LTs are good for 17-22 rwhp on average, shorties ...maybe 7-10rwhp.
Originally Posted by Freaklt1
LOL speak when you know what you are talking about. I gained 5mph in the quarter with Mac headers/ypipe and deleting the cat. How does that translate to 7-10rwhp. So your basically saying you will gain about 1mph with shorties and 2mph with lt's. That is rediculous. I would say going from a stock exhaust to lt's with a cutout will yield 30-40rwhp on average, assuming they are installed correctly.
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From: Clarksville,Tn
Ok, about the sim O2 sensors, where do you get them? And is there a book to read or a website to go to and learn the basics on tuning the ecm? How did yall get this knowledge of how to tune them?? I really would like to learn how to tune these cars and understand the computer side of things.
On The Tree
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From: South Jersey
Originally Posted by Freaklt1
LOL speak when you know what you are talking about. I gained 5mph in the quarter with Mac headers/ypipe and deleting the cat. How does that translate to 7-10rwhp. So your basically saying you will gain about 1mph with shorties and 2mph with lt's. That is rediculous. I would say going from a stock exhaust to lt's with a cutout will yield 30-40rwhp on average, assuming they are installed correctly.
Rich
On The Tree
Joined: Nov 2003
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From: South Jersey
Originally Posted by speedluv
Ok, about the sim O2 sensors, where do you get them? And is there a book to read or a website to go to and learn the basics on tuning the ecm? How did yall get this knowledge of how to tune them?? I really would like to learn how to tune these cars and understand the computer side of things.
However, if you have a lot of time on your hand and don't mind cycling through boring code for hours. Get tunercat or lt1 edit and mess around with it.
Rich
Staging Lane
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From: Mesa, Az
Originally Posted by 94Formula/TA
He's just about right. Your cam was causing your exhaust to be a restriction so when you put the headers on then you freed up a lot of lost power.
Rich
Rich
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From: Chattanoga TN
Freaklt1, what mods did you have when you installed your headers?
(i can get my hands on a set of ceramic coated hooker shorties ($200 used)for my ride this weekend and im ting to decide if its a good deal or not performance wise)
(i can get my hands on a set of ceramic coated hooker shorties ($200 used)for my ride this weekend and im ting to decide if its a good deal or not performance wise)
Staging Lane
Joined: Feb 2003
Posts: 91
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From: Mesa, Az
Originally Posted by Bandit 1
Freaklt1, what mods did you have when you installed your headers?