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Has anyone bought/installed the ls1 weiand intake?

This is a discussion on Has anyone bought/installed the ls1 weiand intake? within the External Engine forums, part of the LSx Technical Help Section category; Hey, Has anyone installed an weiand intake manifold on their ls1's yet? If so, do you think it's worth it ...

  1. #1
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    2000 pontiac trans am ws6

    Has anyone bought/installed the ls1 weiand intake?

    Hey,

    Has anyone installed an weiand intake manifold on their ls1's yet? If so, do you think it's worth it and did you "actually" make a gain from it??

  2. #2
    Member c5z28's Avatar
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    Just about everyone will tell you the heat soak will rob you. Most people will agree to get the ls-6 manifold to keep temps down and a proven 10whp.

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    Just me Y2KPewterSS's Avatar
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    The Weiand intake also weighs ~25 pounds versus the lightweight composite LS6.
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    Aite, ls6 it is! thanks guys!

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    Member anniversary30's Avatar
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    just sinkthe cash and get the fast!!!!

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    Member c5z28's Avatar
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    Quote Originally Posted by anniversary30 View Post
    just sinkthe cash and get the fast!!!!
    Sure you loan us the money at any rate unless he has a cam at the least he will hurt his torque curve

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    Just bustin balls, I was going to do the ls6 untill I decided to put heads on.

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    i don't have a cam, just whatever the 2000 ws6 came with, but i do know the 98-2000 ls1's came with bigger cams?

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    Quote Originally Posted by Mr.Lee View Post
    i don't have a cam, just whatever the 2000 ws6 came with, but i do know the 98-2000 ls1's came with bigger cams?
    yes but the 2000 had a smaller cam-believe me you would never know anyway.

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    Member c5z28's Avatar
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    Quote Originally Posted by anniversary30 View Post
    Just bustin balls, I was going to do the ls6 untill I decided to put heads on.
    Did you do head only?

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    Member anniversary30's Avatar
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    actually the project started out a ls6 intake and a cam. Found a few extra dollars and it jumped to a fast intake and thottle body 90mm a larger cam , dart 225 heads , 36 lbs injectors , fuel pump , underdrive crank pully and a new tune.

  12. #12
    TJEA Retirement Home Dr.Crash's Avatar
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    Quote Originally Posted by anniversary30 View Post
    actually the project started out a ls6 intake and a cam. Found a few extra dollars and it jumped to a fast intake and thottle body 90mm a larger cam , dart 225 heads , 36 lbs injectors , fuel pump , underdrive crank pully and a new tune.
    Thats not to far off of the ls6 with a cam.........

    oh and the weiand will prob never come out. but you can wait if you want

  13. #13
    Millennium Falcon mpfranks's Avatar
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    i installed a weiand ls6 intake to my car. i noticed improvement. i really dont believe this nonsense about heat soak. other than a few annoying things during the install i like it. its cool too because its the john lingenfelter edition, and as we all know, that guy knows a few things about ls1's...

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    Hey mpfranks!

    I notice u modify ur ls1 coolant lines to fit the weiand manifold...if u cut and braze as the instructions tell u where did u hook up the coolant line to the throttle body?

    and i i'm thinking of getting a weiand too, 370$ a good price brand new?

  15. #15
    Millennium Falcon mpfranks's Avatar
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    Quote Originally Posted by Mr.Lee View Post
    Hey mpfranks!

    I notice u modify ur ls1 coolant lines to fit the weiand manifold...if u cut and braze as the instructions tell u where did u hook up the coolant line to the throttle body?

    and i i'm thinking of getting a weiand too, 370$ a good price brand new?
    you have to modify your coolant lines for any ls6 intake unless you have a 01-02. the bottom of the ls6 intake is different than the ls1, there is no valley on the ls6. and no, i have an 80mm throttle body, so i got a new piece of hose and did the TB bypass. i think thats about what i paid too. i am happy with the gains from my weiand, but i did have a few complaints during the install. i wrote about it in the other thread.

    coolant lines!!!!!!!!!!

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    ya i have 2000, so i guess i'll be doing some modifying. Are the gains 4000 rpm and up? approx 15 rwhp?

  17. #17
    Millennium Falcon mpfranks's Avatar
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    Quote Originally Posted by Mr.Lee View Post
    ya i have 2000, so i guess i'll be doing some modifying. Are the gains 4000 rpm and up? approx 15 rwhp?
    i couldnt tell you the hp gains, ive never had my car on a dyno. but yeah, definitely an increased power band. that was the first thing i noticed. youll get the same gains as the gm ls6 intake, im sure its within a couple hp.

  18. #18
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    I thought weiand advertised around 30hp/tq on their intake? I am planning on this intake and probably the hot cam kit in the future. Glad this thread came up cause I was about to ask the same question.

  19. #19
    Millennium Falcon mpfranks's Avatar
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    Quote Originally Posted by robcas47 View Post
    I thought weiand advertised around 30hp/tq on their intake? I am planning on this intake and probably the hot cam kit in the future. Glad this thread came up cause I was about to ask the same question.
    im sure they say 30hp but thats on the motor. its about 10-15hp to the wheels

  20. #20
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    the problem is that we have never seen any proof of those HP claims

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