Page 1 of 3 123 LastLast
Results 1 to 20 of 46

Why Cant I get into the 12sec with my car

This is a discussion on Why Cant I get into the 12sec with my car within the General Help forums, part of the LSx Technical Help Section category; I have a 1998 Trans Am with a LS6 Intake, OBX long tube headers, 3.73 gear, SLP lid and a ...

  1. #1
    Junior Member gmtech86's Avatar
    Join Date
    Nov 2009
    Location
    Illinois
    Age
    45
    Posts
    15

    Black and Black
    98 Trans Am and 07 GXP

    Why Cant I get into the 12sec with my car

    I have a 1998 Trans Am with a LS6 Intake, OBX long tube headers, 3.73 gear, SLP lid and a dyno tune from SPEED INC. The best time I got was a 13.05 at 106 mph ?

  2. #2
    Member
    Join Date
    Feb 2008
    Location
    NEW JERSEY
    Posts
    814

    PEWTER
    2001 TRANS AM WS6

    Quote Originally Posted by gmtech86 View Post
    I have a 1998 Trans Am with a LS6 Intake, OBX long tube headers, 3.73 gear, SLP lid and a dyno tune from SPEED INC. The best time I got was a 13.05 at 106 mph ?
    AUTO? somethings not right I'm running 13.1 at 108 mph im a m6 with stock manifolds

  3. #3
    Junior Member gmtech86's Avatar
    Join Date
    Nov 2009
    Location
    Illinois
    Age
    45
    Posts
    15

    Black and Black
    98 Trans Am and 07 GXP

    yes it is a auto

  4. #4
    Member Faught's Avatar
    Join Date
    Jun 2010
    Location
    round rock TX
    Posts
    354

    white
    1999 Trans Am

    get some DR if ya dont have any if u run street tire like i do you spin 1st and into 2nd

  5. #5
    Senior Member Z28Thunder's Avatar
    Join Date
    Dec 2006
    Location
    Broken Arrow, Ok
    Age
    52
    Posts
    4,542

    Arctic White
    2000 Z28

    I take it you're on the stock converter. It will be hard to get a good 60' with the stock converter. The stocker is a 1900 ircc so it has to come up from 1900 rpm to get in the power band.
    Last edited by Z28Thunder; 10-21-2010 at 12:45 PM.

  6. #6
    its short but its skinny. jiveass's Avatar
    Join Date
    Oct 2009
    Location
    The Woodlands/spring/houston
    Posts
    2,142

    pewter
    99 trans am

    elevation? ask luos about that...it can be a real bitch...you should be at least high 12s in my neck of the woods...

  7. #7
    its short but its skinny. jiveass's Avatar
    Join Date
    Oct 2009
    Location
    The Woodlands/spring/houston
    Posts
    2,142

    pewter
    99 trans am

    Quote Originally Posted by Z28Thunder View Post
    I take it your on the stock converter. It will be hard to get a good 60' with the stock converter. The stocker is a 1900 ircc so it has to come up from 1900 rpm to get in the power band.
    or this lol

  8. #8
    Senior Member Z28Thunder's Avatar
    Join Date
    Dec 2006
    Location
    Broken Arrow, Ok
    Age
    52
    Posts
    4,542

    Arctic White
    2000 Z28

    Quote Originally Posted by jiveass View Post
    elevation? ask luos about that...it can be a real bitch...you should be at least high 12s in my neck of the woods...
    It's DA not just elevation that is a bitch...

  9. #9
    Moderator Firebirdjones's Avatar
    Join Date
    May 2006
    Location
    Arizona
    Posts
    12,552
    Quote Originally Posted by gmtech86 View Post
    I have a 1998 Trans Am with a LS6 Intake, OBX long tube headers, 3.73 gear, SLP lid and a dyno tune from SPEED INC. The best time I got was a 13.05 at 106 mph ?
    Your MPH is more than enough to support a 12 second run. The issue is your 60 foot time. Without a converter these LS1's are a little soggy down low. A good converter and a set of tires that allow you to use every bit of that new converter will cut 1/2 a second.

    With savy driving on stock rubber you can still see 2-3 tenths improvement with a converter change.

  10. #10
    Senior Member Z28Thunder's Avatar
    Join Date
    Dec 2006
    Location
    Broken Arrow, Ok
    Age
    52
    Posts
    4,542

    Arctic White
    2000 Z28

    Quote Originally Posted by Firebirdjones View Post
    Your MPH is more than enough to support a 12 second run. The issue is your 60 foot time. Without a converter these LS1's are a little soggy down low. A good converter and a set of tires that allow you to use every bit of that new converter will cut 1/2 a second.

    With savy driving on stock rubber you can still see 2-3 tenths improvement with a converter change.
    Sounds like post #5..

  11. #11
    Slow'er'Ass Mr. Luos's Avatar
    Join Date
    Aug 2005
    Location
    Thornton, CO
    Posts
    23,785

    Red Tint Jewelcoat
    2008 Trailblazer SS

    Needs a stall.

    Regardless of DA....a stall would get this car into the 12's fairly easily.
    2008 Trailblazer SS
    Yank PTB3600, Kooks 1 7/8" LT's, 4" intake, E-fans, Magnaflow, Sonnax kit, tranny cooler, tune.
    Lowered, HID's, tinted.

    1999 Pontiac Trans Am WS.6 #1747 SOLD
    531.1 RWHP 481.3 FT/Pounds all motor.

  12. #12
    Junior Member gmtech86's Avatar
    Join Date
    Nov 2009
    Location
    Illinois
    Age
    45
    Posts
    15

    Black and Black
    98 Trans Am and 07 GXP

    I have a stock convertor im in illinois and my 60 foot time is 1.987 and im not spinning my tires off the launch

  13. #13
    Moderator Firebirdjones's Avatar
    Join Date
    May 2006
    Location
    Arizona
    Posts
    12,552
    Quote Originally Posted by Z28Thunder View Post
    It's DA not just elevation that is a bitch...
    Exactly, you really need to calculate DA numbers to compare times from different elevation changes.

    Just because Luos races at a track that is 7,000 feet up doesn't necessarily mean the air is that bad. With cool weather and the right conditions you could see DA numbers actually below the elevation you are at.
    On the flip side of that coin, with hot humid summer days the DA can easily climb above the actual elevation.

  14. #14
    Senior Member Z28Thunder's Avatar
    Join Date
    Dec 2006
    Location
    Broken Arrow, Ok
    Age
    52
    Posts
    4,542

    Arctic White
    2000 Z28

    Quote Originally Posted by gmtech86 View Post
    I have a stock convertor im in illinois and my 60 foot time is 1.987 and im not spinning my tires off the launch
    The stock conveter is your problem.

  15. #15
    Moderator Firebirdjones's Avatar
    Join Date
    May 2006
    Location
    Arizona
    Posts
    12,552
    Quote Originally Posted by Z28Thunder View Post
    Sounds like post #5..
    Ah, I see that now

  16. #16
    Junior Member gmtech86's Avatar
    Join Date
    Nov 2009
    Location
    Illinois
    Age
    45
    Posts
    15

    Black and Black
    98 Trans Am and 07 GXP

    What Stall should I go with ?

  17. #17
    Senior Member Z28Thunder's Avatar
    Join Date
    Dec 2006
    Location
    Broken Arrow, Ok
    Age
    52
    Posts
    4,542

    Arctic White
    2000 Z28

    Quote Originally Posted by gmtech86 View Post
    What Stall should I go with ?
    I would go with a 3500.

  18. #18
    Slow'er'Ass Mr. Luos's Avatar
    Join Date
    Aug 2005
    Location
    Thornton, CO
    Posts
    23,785

    Red Tint Jewelcoat
    2008 Trailblazer SS

    Quote Originally Posted by gmtech86 View Post
    What Stall should I go with ?
    Yank 3600


    Quote Originally Posted by Firebirdjones View Post
    Exactly, you really need to calculate DA numbers to compare times from different elevation changes.

    Just because Luos races at a track that is 7,000 feet up doesn't necessarily mean the air is that bad. With cool weather and the right conditions you could see DA numbers actually below the elevation you are at.
    On the flip side of that coin, with hot humid summer days the DA can easily climb above the actual elevation.
    Bandimere is at 5800 feet.
    The air sucks.

    Never run the car in under an 8K DA. I have driven it when it is like 6K....winter time. Let me tell you....could only imagine having a cool November day out at Atco (in Jersey) with this car.
    Think that cat with the Z06's got a -800DA out there once....Ranger I think??
    Did the correction on mine to -800....let's just say with a little more gear and some weight out....could be looking at 9's set-up proper. Maybe if I get that TBSS I could go all out with the T/A...
    /thinking outloud

  19. #19
    Moderator Firebirdjones's Avatar
    Join Date
    May 2006
    Location
    Arizona
    Posts
    12,552
    Quote Originally Posted by gmtech86 View Post
    I have a stock convertor im in illinois and my 60 foot time is 1.987 and im not spinning my tires off the launch
    I know what you are saying. My auto was the same way with the stock converter. With the track prep very nice, I could flat nail the gas, and the car would dead hook. The problem was though, the tight stock converter kept the engine below it's torque peak for 30-40 feet while the rpms slowly climbed.
    Made for a deadly consistent car, just not what it could be though. A simple 3400 stall not only made the car quicker, but that well prepped track suddenly became a challenge to drive on the same stock rubber. My 60 foot times still improved with a little finess driving, and the car immediately fell into the 12's, with just headers and the converter.

  20. #20
    Junior Member gmtech86's Avatar
    Join Date
    Nov 2009
    Location
    Illinois
    Age
    45
    Posts
    15

    Black and Black
    98 Trans Am and 07 GXP

    Thanks for your help guys

Page 1 of 3 123 LastLast

Thread Information

Users Browsing this Thread

There are currently 1 users browsing this thread. (0 members and 1 guests)

Similar Threads

  1. Replies: 26
    Last Post: 03-02-2007, 08:45 AM

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •