11.20's -11.30's is this my limit w/ this combo

Discussion in 'Time Slip and Combo Database' started by jetmech, Sep 21, 2010.

11.20's -11.30's is this my limit w/ this combo

Discussion in 'Time Slip and Combo Database' started by jetmech, Sep 21, 2010.

  1. jetmech

    jetmech Member

    0   0   0

    Joined:
    May 25, 2001
    Messages:
    871
    Likes Received:
    1
    Offline
    Ive gone as fast as 11.23 but sunday i made 11 passes on sunoco 110 and my best was 11.34 . Running 25* timing 4 % rich. Ran 6% but car slowed down on mph. 2 percent was tickling kr. Im running 26 lbs of boost. Does this sound like the limit of my combo. engine has 128k on bottom end, it has stock size valves but fully ported heads by knperformane w/ his intake and doghouse. Should i take the tuning in a different direction next time ie. lower my boost a few pounds and go up anouther 2 degrees of timing. My 60's are a best of 1.46 -1.53. Thanks. Also i thing im in the 3500-3600lb range w/ me in it.
  2. gs462

    gs462 Member

    0   0   0

    Joined:
    May 18, 2003
    Messages:
    935
    Likes Received:
    0
    Offline
    Your sig says Dutweiller neck IC is this a STOCK IC with just a Dut neck?
  3. 1fast6

    1fast6 Active Member

    0   0   0

    Joined:
    Aug 2, 2010
    Messages:
    1,203
    Likes Received:
    2
    Offline
    I thought we decided that boost is better than timing.
  4. jetmech

    jetmech Member

    0   0   0

    Joined:
    May 25, 2001
    Messages:
    871
    Likes Received:
    1
    Offline
    Yes stock intercooler, and i tried higher boost but i kept turning the rod shorter and the boost stayed at 26. I think i need to stretch the rjc spring.
  5. gs462

    gs462 Member

    0   0   0

    Joined:
    May 18, 2003
    Messages:
    935
    Likes Received:
    0
    Offline
    WOW I'm surprised you're going as fast as you are with the stock IC, Id guess
    with better IC you'd pick up a BUNCH!
  6. jetmech

    jetmech Member

    0   0   0

    Joined:
    May 25, 2001
    Messages:
    871
    Likes Received:
    1
    Offline
    I was hoping to squeeze a little more out of it w/ that intercooler but it may need an upgrade. Lets see what others have to say.
  7. bison

    bison Moderator Staff Member

    0   0   0

    Joined:
    Dec 19, 2005
    Messages:
    14,268
    Likes Received:
    650
    Offline
    Your intercooler is hurting you more than you think. Go to a really tall tire. I just went 11.30's@122mph with one of my car and an old 61 turbo with a .63 Garrett. I have heads i ported with stock valves. It was 91* and boost was 26-27psi. 60's were 1.80's. only had 2 passes before i got booted. Spun first time. Second time launched off vaccum. With good air and a 1.50 it should go 10.8.
  8. YouLikeThat

    YouLikeThat Member

    0   0   0

    Joined:
    Aug 24, 2004
    Messages:
    884
    Likes Received:
    4
    Offline
    I'll vote for an intercooler. Great times you have BTW.
  9. jetmech

    jetmech Member

    0   0   0

    Joined:
    May 25, 2001
    Messages:
    871
    Likes Received:
    1
    Offline
    Thanks for the advice, I guess its time for a better intercooler. If not this year there will be one on there next year.
  10. gs462

    gs462 Member

    0   0   0

    Joined:
    May 18, 2003
    Messages:
    935
    Likes Received:
    0
    Offline
    I would venture to say that with nothing more than a better
    IC you should be knocking on the door to, if not IN the 10s
  11. Just a Six??

    Just a Six?? OK! Who Farted??

    0   0   0

    Joined:
    Jul 4, 2003
    Messages:
    3,239
    Likes Received:
    2
    Offline
    Do you have a cage? If not they will just boot you off the track after 11.50
  12. jetmech

    jetmech Member

    0   0   0

    Joined:
    May 25, 2001
    Messages:
    871
    Likes Received:
    1
    Offline
    Our track is pretty linient(spelling) on the cage. But yes a 8 pt. is in the works too. Thanks .
  13. NCTURBOS

    NCTURBOS Gettin' back in action!!

    0   0   0

    Joined:
    May 26, 2001
    Messages:
    3,318
    Likes Received:
    15
    Offline
    What rpm are you going through the traps...?


    K.
  14. bsdlinux

    bsdlinux Just Another BLACK Car

    0   0   0

    Joined:
    Jul 29, 2001
    Messages:
    1,462
    Likes Received:
    0
    Offline
    I don"t think that is always true with the smaller turbos, granted a 61 is not really small but I know the stock, 44, 49s respond real well to a lot of timing especially the stock turbo. Ask Bison he is smart :p
  15. Blazer406

    Blazer406 Mechanical Engineer

    0   0   0

    Joined:
    May 2, 2002
    Messages:
    4,799
    Likes Received:
    27
    Offline
    Nice 60' times.

    I don't see alky on your list of mods in your sig..... alky will likely help on the intercooler.... by lowering inlet temps a pile....... therefore allowing you to run more boost........might squeeze a 10 out with a few more psi.....

    The dutt neck intercooler is a restriction.... I agree with others..... but alky can help you stretch it a little further..... and makes for some major fun on the street......
  16. bsdlinux

    bsdlinux Just Another BLACK Car

    0   0   0

    Joined:
    Jul 29, 2001
    Messages:
    1,462
    Likes Received:
    0
    Offline
    Agreed +1 on Alky

    I went the E-85 route with my White ( stock turbo, IC ) car and I got a lot more out of it because the E-85 cools the charge.
  17. Mr.Spool

    Mr.Spool Well-Known Member

    0   0   0

    Joined:
    Nov 6, 2006
    Messages:
    1,332
    Likes Received:
    31
    Offline
    obviously at your discresion,but i think you should raise the boost before timing that 61 cant be out of breath at 26lbs.
  18. jetmech

    jetmech Member

    0   0   0

    Joined:
    May 25, 2001
    Messages:
    871
    Likes Received:
    1
    Offline
    Im going thru the traps at 5375, i shift at 6000 give or take a 100 rpm. My rpm drops about 1000 on shifts.
  19. Buix893

    Buix893 Buick = $$$

    0   0   0

    Joined:
    Jul 2, 2009
    Messages:
    449
    Likes Received:
    0
    Offline
    IMO A good stretch IC with alky is unbeatable. My car ran a best of 11.90 last season at 23 psi with a 1.60 60ft *dutt Stocker*...I swapped in a 23 row stretch intercooler and at lower boost level with a worse 1.70 60ft it ran 11.67...so I would say the intercooler helped....:cool:
  20. jetmech

    jetmech Member

    0   0   0

    Joined:
    May 25, 2001
    Messages:
    871
    Likes Received:
    1
    Offline
    Ok i went racing today. 85 degrees and pretty humid. New mods this year is the BA front mount and fiberglass front bumper. Last year i could only get 26-27 pounds of boost thru the duttneck I/C. Today i was only able to get about 22 pounds of boost and a disapointing 11.70 at 114. The day i hit 11.20 it was low 60's and DA was around 100 ft so it was very good air. I think its time to stretch the spring on the RJC boost controller to get more boost. Or if anyone has any ideas let me know. Thanks

Share This Page