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(Mid length vs. long tubes) solid numbers?

This is a discussion on (Mid length vs. long tubes) solid numbers? within the External Engine forums, part of the LSx Technical Help Section category; Does anyone know how much power i will pick untuned from mid length headers and then how much from longtubes. ...

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    Member 180ls1's Avatar
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    1998 Firebird Formula WS6

    (Mid length vs. long tubes) solid numbers?

    Does anyone know how much power i will pick untuned from mid length headers and then how much from longtubes. I was thinking a good 15-20rwhp or so from the mids like macs and 20-25rwhp or so from the longtubes like pacesetters. Anyone have any numbers or best educated guess?
    1998 Firebird Formula WS6... few things done.

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    LS1 Inside Bigdeezs's Avatar
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    I've always wondered this myself...like how much actual difference is there between mid and long tubes in power?

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    2 SS's are better than 1 Jays00ss's Avatar
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    The stock exhaust manifolds flow pretty well, I would not waste my money on Mid length headers, Maybe a 5 hp difference. If you are going through the hassle Long tubes are the only way to go, you will see a 20-25 hp difference with longtubes.
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    Quote Originally Posted by Jays00ss View Post
    The stock exhaust manifolds flow pretty well, I would not waste my money on Mid length headers, Maybe a 5 hp difference. If you are going through the hassle Long tubes are the only way to go, you will see a 20-25 hp difference with longtubes.

    This is true. Mids are a complete waste of time and money.

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    x2^^^^^

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    Member 180ls1's Avatar
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    thanks for the help guys it is just i live in California and i was thinking i would pick up more then that with mids and a ory. my local smog guy does not do a good visual so i could get it past him as long as i had the cats installed. So i am thinking longtubes or nothing then i guess?

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    Quote Originally Posted by 180ls1 View Post
    thanks for the help guys it is just i live in California and i was thinking i would pick up more then that with mids and a ory. my local smog guy does not do a good visual so i could get it past him as long as i had the cats installed. So i am thinking longtubes or nothing then i guess?
    Yep if you don't go LTs you'd be better off spending your money on other mods

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    Senior Member 440 rwhp trans am's Avatar
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    Quote Originally Posted by Bigdeezs View Post
    I've always wondered this myself...like how much actual difference is there between mid and long tubes in power?
    well it depends on your mods. but no questions asked go for long tubes

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    LS1 Inside Bigdeezs's Avatar
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    Quote Originally Posted by 440 rwhp trans am View Post
    well it depends on your mods. but no questions asked go for long tubes
    Yeah I've always heard that...but I'd like to see back to back dyno results after shorties then LTs on the same car with being tuned correctly for each.

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    Member 180ls1's Avatar
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    Quote Originally Posted by Bigdeezs View Post
    Yeah I've always heard that...but I'd like to see back to back dyno results after shorties then LTs on the same car with being tuned correctly for each.
    me to cause i had a mod on tech tell me that i would get nice gains from a pair of mid length headers but i guess no one has official numbers

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    I Like It Stroked 99Ls1fever's Avatar
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    I would go with Longtubes myself, I have QTP longtubes and have nothing but positive stuff to say about them. I did pick up the 40 hp and 40trq the quote by on the website. So I am a believer in the Longtubes personally.

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    LS1 Inside Bigdeezs's Avatar
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    Quote Originally Posted by 99Ls1fever View Post
    I would go with Longtubes myself, I have QTP longtubes and have nothing but positive stuff to say about them. I did pick up the 40 hp and 40trq the quote by on the website. So I am a believer in the Longtubes personally.
    with a tune I'm assuming?

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    I Like It Stroked 99Ls1fever's Avatar
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    Yes 100% correct, When we orginally hooked it up to be dyno to be dyno tuned it was 23 rwhp with just the long tubes on with no dyno tuning. But, you could fully tell it wasn't running 100%. And, I just love the chrome look of headers under the hood and the crisper sound

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    Quote Originally Posted by 99Ls1fever View Post
    Yes 100% correct, When we orginally hooked it up to be dyno to be dyno tuned it was 23 rwhp with just the long tubes on with no dyno tuning. But, you could fully tell it wasn't running 100%. And, I just love the chrome look of headers under the hood and the crisper sound
    sweet...I have a buddy with an 02 who did a tune on his car when stock (might have had a K&N and lid) and he went from about 320 to 340...he is likely getting QTP longtubes next and will retune then.

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    Member 180ls1's Avatar
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    Quote Originally Posted by 99Ls1fever View Post
    Yes 100% correct, When we orginally hooked it up to be dyno to be dyno tuned it was 23 rwhp with just the long tubes on with no dyno tuning. But, you could fully tell it wasn't running 100%. And, I just love the chrome look of headers under the hood and the crisper sound
    did you go with y pipe setup or duals?

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    I Like It Stroked 99Ls1fever's Avatar
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    Quote Originally Posted by 180ls1 View Post
    did you go with y pipe setup or duals?
    I went with duals, I ran a straight pipe about two feet back off the long tubes and then went with a race muffler with no restrications, and then dumped them right after the axle assembley, basically right at the axle.

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    Senior Member INMY01TA's Avatar
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    Shorties are a waste but Mac mids will make damn close what long tubes do. Whoever said Macs will only gain you 5hp is wrong.

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    Member 180ls1's Avatar
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    Quote Originally Posted by INMY01TA View Post
    Shorties are a waste but Mac mids will make damn close what long tubes do. Whoever said Macs will only gain you 5hp is wrong.
    ok thats what i was thinking with a mostly stock car but people said otherwise. i really would like to see numbers.

    MACs vs Grotyohann headers... dyno results
    http://www.ls1tech.com/forums/showthread.php?t=60809

    i found this thread but i cant see the dyno is it just my computer can anyone else see the numbers in the link?

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    LS1 Inside Bigdeezs's Avatar
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    its super old...pics are dead

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    Longtubes are the only way to go. Macs are a good header

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