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Want to run 12's...need advice

This is a discussion on Want to run 12's...need advice within the General Help forums, part of the LSx Technical Help Section category; Hey guys I really want to get my car into the 12's before I hit up the drag strip 1st. ...

  1. #1
    Member myk02k's Avatar
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    Want to run 12's...need advice

    Hey guys I really want to get my car into the 12's before I hit up the drag strip 1st. I have a few things though that I'm concerned in modifying. #1 is the want to keep good gas mileage, #2 is to keep the car as street-legal as possible, #3 is not to touch the trans cuz of all the work that has been done with it and the warranty I have on it, and #4 is no DR's or NOS cuz if it runs 12's I want it to run 12's on the street

    Here's the specs of my car and what's been done:

    '00 Z28 3.23's A4 w/ Y3F kit (a little more weight I guess?) 70k miles
    K&N FIPK, plastic MAF ends, TB coolant bypass, GMS wires, Hooker cat-back, PHB, LCA, SFC, STB

    And the new trans...
    4L60E remanufactured
    -New boost valve and sleeve are installed in the transmission pump
    -the low/reverse checkball is removed
    -Modified pump slide with spacer
    -TCC Control Valve, TCC Regulator valve and the Actuator Feed
    Limit are replaced and the bores are reamed
    -The forward and reverse abuse plugs in the valve body are replaced
    -New Pressure Switch Manifold
    -New Pressure Contol Selonoids
    -The latest design sun shell is installed.
    -The return springs in the 3-4 clutch are removed and the exhaust
    port in the separator plate is enlarged
    -The torque converter is remanufactured using a state-of-the-art
    converter aligner/welder
    -High energy 2-4 band is used
    -High energy 3-4 clutch pack and increased lined clutch and steel
    plates (from 6 to 7)
    -Aluminum 1-2 accumulator pistons
    -All new pump and case bushings

    I went for a "Class 1" upgrade, which I think consisted of Alto clutch packs, servo & beast shell larger than the Corvettes, and other things I don't remember. It'll shift HARD, usually ripping my tires between 1-2 on 50+% throttle and WOT it'll smoke em.

    I put the ends on assuming it would help with the backfire on deceleration. The car pops like hell if I rev it to redline and then let off. I think I'm going to invest in something like EFI Live 2 or HPTuners. Another alarming thing I noticed was blow-by on just #7 cylinder.
    Last edited by myk02k; 04-08-2007 at 12:12 PM.

  2. #2
    Slow'er'Ass Mr. Luos's Avatar
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    Will a stall converter mess with the warrenty??
    Because you need one.

  3. #3
    Member myk02k's Avatar
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    Quote Originally Posted by Mr. Luos View Post
    Will a stall converter mess with the warrenty??
    Because you need one.
    that's gonna have to wait for 2 more years....they put seals around the trans so if it's been modified they'd know

  4. #4
    Slow'er'Ass Mr. Luos's Avatar
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    Headers for sure.
    Although running on street tires is going to get you. Traction may be an issue.
    The stall is the biggest thing though. I bet a stall alone would get you very close once you learned how well your street tires grab at the strip.

  5. #5
    Member myk02k's Avatar
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    I hear you on the headers, might as well go w/ high-flo cats and a new Y then....other than the TC, what could I do to get to 12's?

    I'm thinking maybe LS6 intake & UD pulleys? Would a LS6 cam be worth it/gas decrease?

  6. #6
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    Quote Originally Posted by myk02k View Post

    I'm thinking maybe LS6 intake & UD pulleys? Would a LS6 cam be worth it/gas decrease?
    LS6 intake and UD pulleys are a good idea. But the LS6 cam isn't worth it in my opinion. Probably 10-15rwhp. Hardy worth the effort to swap a cam. If you want a cam - GO BIGGER!!

  7. #7
    JUISSED Midnight02's Avatar
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    LS6 intake and a pulley swap would be a nice start. You can squeeze a little more by porting the stock throttle body and the bump stop mod. Get yourself a good tune and hope you can find traction on the stock tires.

    Otherwise, a gear swap, a street friendly set of drag radials (I love the Nitto 555R once it gets warm) and finally a TC should get you well into the 12's.

  8. #8
    Slower Than a 3rd Gen juiced99ws6's Avatar
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    get a nice 224/224 cam. shouldnt hurt your gas mileage to much.. also the LS6 intake, headers, and lid

  9. #9
    Just another Joe Eagle's Avatar
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    I've got just 1 link for you:

    http://www.harrisspeedworks.com

  10. #10
    The Bandit Wesman's Avatar
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    Here's what I would do. All these mods will give you more power, better efficiency, better sound, and better fuel economy. Can't beat that for a street driven car.

    LS6 Intake Manifold
    Long Tube Headers
    Underdrive Pulleys
    True Dual 2.5" Exhaust
    ECU Tune

    That should get you mid-high 12's no problem.

    If you want more upgrades, go with a stall converter and 3.73 gears. However, both will decrease fuel economy by a few MPG, and the stall will change street driveability. You will of course go faster though

  11. #11
    Member kams95ss's Avatar
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    Some guy around here has A4 camaro and ran a 12.4 with just a lid,cutout,tune,and dr's

  12. #12
    Member kams95ss's Avatar
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    no stall stock motor and stock exhaust

  13. #13
    The Bandit Wesman's Avatar
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    Quote Originally Posted by kams95ss View Post
    Some guy around here has A4 camaro and ran a 12.4 with just a lid,cutout,tune,and dr's
    I find that very hard to believe...if he had a big stall, that would be a different story.

  14. #14
    Visualize°Design°Create SSwt00SS's Avatar
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    guys he is in CA, so LT's/ORY might be out of the question. I agree, a cam around 224 duration, lid, U/D pulley, and an Ls6 intake, and some drag radials might do the trick...

    other than that, i would suggest 3.373's for the rear...

  15. #15
    Senior Member INMY01TA's Avatar
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    Life's to short to worry about warranty. Get a stall!

  16. #16
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    Gears, 3.73's, lid, ported t/b, LS6 intake....and drag radials... you will be fine...

  17. #17
    Member kams95ss's Avatar
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    He's on ls1tech I thinks his name is dadsz28 or dadscamaro. 12.4 no stall stock motor and exhaust all he has is dr's,tune,lid,and cutout

  18. #18
    Member kams95ss's Avatar
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    Don't hate cuz it takes you 200 mods to get into the 12's I don't know what is it but alot of guys on here Have all the mods in the world and can't get lower than a 12.6 or 12.8? Let alone some guys in here that post there stock times are pretty high I always see sigs sayin 13.8,13.9, or 13.6 bone stock! I'm not trying to say I have the fastest f body I'm far from that and i'm not tryin to say that I'm a F-body wizard or a great driver but somethings gotta give. I run 12.7's all day with lid,tsp rumbler, and dr's. When I go to the track I see alot of f-bodies running slow numbers with no traction issue or anything of that matter, maybe some cars have and some don't I guess.

  19. #19
    Member NiteRiderWs6's Avatar
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    THE WS6 THAT COULD
    Quote Originally Posted by kams95ss View Post
    He's on ls1tech I thinks his name is dadsz28 or dadscamaro. 12.4 no stall stock motor and exhaust all he has is dr's,tune,lid,and cutout
    i belive it...its not about the all the mods you have its how good you can drive the car

  20. #20
    PFM
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    Quote Originally Posted by NiteRiderWs6 View Post
    i belive it...its not about the all the mods you have its how good you can drive the car
    You need to go to your local Dragstrip on Test & Tune day and practice.By the way drag radials are street legal and anybody on here with a tricked out
    F-body has to run them. If I put regular street tire on my ride what time the car isn't melting them I would be sideways and the car would be totally undrivable on the street.

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