• Welcome to SVTPerformance!

2.93 or 2.76 with 4lb lower on a ported eaton?

Discussion in 'Engine/Tuning' started by SVT-NAV, Oct 9, 2012.

  1. SVT-NAV

    SVT-NAV New Member Established Member

    Messages:
    288
    Joined:
    Jul 27, 2012
    Location:
    Seattle, WA
    Hey guys I bought a steig stage 6 ported blower from a member on svtp. The set up he had was a 2.93 upper,4lb lower with no long tubes. I have bbk long tubes and read that it decreases boost and adds power, so my question is can I run a 2.76 with 4 lb lower or would that be an overkill? What would be the difference in power between the 2 setups? Here are the engine mods( all are going to be installed soon) The member that I bought the blower from had similiar mods to me except the BBK LT's.

    Stegemeir stage 6 Ported Blower
    Ported Plenum
    Dragon tb
    80lb injectors
    Mafia
    Metco 4lb lower
    2.93 upper OR 2.76
    JLT CAI
    Afco dual pass H/E
    KB BAP
    BBK LT Headers
    2.5 inch O/R Xpipe
    2.5 inch Bassani Catback
     
    Last edited: Oct 9, 2012
  2. svt4me38

    svt4me38 TEAM VMP TVS Established Member

    Messages:
    5,510
    Joined:
    Aug 19, 2009
    Location:
    Bealeton, Va
    2.9&4 for best street car combo, 2.9&6 for more racing!!! Proven combos by POSI!
     
  3. jrichber

    jrichber browser Established Member

    Messages:
    728
    Joined:
    Jul 25, 2011
    Location:
    South Dakota
    If you want the power go with the 2.76/4. If you want it more conservative run the 2.93.
     
  4. timspony

    timspony TVS Powered Established Member

    Messages:
    11,875
    Joined:
    Feb 4, 2009
    Location:
    Burnt Hills, NY
    I have both...I like the 2.76" a little more! :D ...Numbers in my sig!
     
  5. SYMach1

    SYMach1 IRS FTW! Established Member

    Messages:
    2,208
    Joined:
    Jun 19, 2005
    Location:
    Sterling,Va
    Just switched to a 2.76/4lb for track use in quest of my 10 sec pass, I ended up with k080785 belt on my combo
     
  6. SVT-NAV

    SVT-NAV New Member Established Member

    Messages:
    288
    Joined:
    Jul 27, 2012
    Location:
    Seattle, WA
    So what did you notice regarding the power gains between the two setups? Whats tbe boost difference?
     
    Last edited: Oct 9, 2012
  7. timspony

    timspony TVS Powered Established Member

    Messages:
    11,875
    Joined:
    Feb 4, 2009
    Location:
    Burnt Hills, NY
    On the dyno I saw a few more RWHP with the 2.76"...however, the 2.76" put down 10 more rwtq!!!!! :D
     
  8. SVT-NAV

    SVT-NAV New Member Established Member

    Messages:
    288
    Joined:
    Jul 27, 2012
    Location:
    Seattle, WA
    Thats what I like to hear:) And I noticed that you ran 10.99 on a Ported Blower.....thats INSANE! Makes me happy that I have a ported blower, too bad it wasnt a Posi.
     
  9. timspony

    timspony TVS Powered Established Member

    Messages:
    11,875
    Joined:
    Feb 4, 2009
    Location:
    Burnt Hills, NY
    Thanks!!! ...If I could get the car to stop "spinning" now with the new clutch, I might see high 10.7's to low 10.8's! :burnout: ... But that's Racing!!!
     
  10. SVT-NAV

    SVT-NAV New Member Established Member

    Messages:
    288
    Joined:
    Jul 27, 2012
    Location:
    Seattle, WA
    That's what I'm thinking. Just havent seen too many combos with 2.76/4, I hear more about the 2.93/4, probably because its more conservative like you said.
     
    Last edited: Oct 9, 2012
  11. SVT-NAV

    SVT-NAV New Member Established Member

    Messages:
    288
    Joined:
    Jul 27, 2012
    Location:
    Seattle, WA

    How much hp/tq did you increase with the 2.76 opposed to the 2.93
     
  12. SYMach1

    SYMach1 IRS FTW! Established Member

    Messages:
    2,208
    Joined:
    Jun 19, 2005
    Location:
    Sterling,Va
    Dunno my 2.93/4lb combo put down 519/518 but ill be at the track testing my 2.76/4lb combo next weekend at the ford event, so ill have something to compare it too soon, but ill be on a more agg tune also so it might be hard to compare the two
     
  13. SVT-NAV

    SVT-NAV New Member Established Member

    Messages:
    288
    Joined:
    Jul 27, 2012
    Location:
    Seattle, WA
    Let me know what it puts down!
     
  14. timspony

    timspony TVS Powered Established Member

    Messages:
    11,875
    Joined:
    Feb 4, 2009
    Location:
    Burnt Hills, NY
    This should help... :D

    2012-10-06184836-1.jpg
    nmra_BG1.jpg
     
  15. SYMach1

    SYMach1 IRS FTW! Established Member

    Messages:
    2,208
    Joined:
    Jun 19, 2005
    Location:
    Sterling,Va
    He is also on that magic juice e85! Lol but there are a few 10 sec eatons with that pulley combo


    Sent from my iPhone using Tapatalk
     
  16. SVT-NAV

    SVT-NAV New Member Established Member

    Messages:
    288
    Joined:
    Jul 27, 2012
    Location:
    Seattle, WA
    Wish I had E85 near by, or else I would be on that too!
     
  17. timspony

    timspony TVS Powered Established Member

    Messages:
    11,875
    Joined:
    Feb 4, 2009
    Location:
    Burnt Hills, NY
    E85_2.gif ... too bad!!!
     
  18. BADASS03SVT

    BADASS03SVT Well-Known Member Established Member

    Messages:
    12,987
    Joined:
    Oct 25, 2003
    Location:
    MA
    my setup was a 2.93 / 6# for a little more belt wrap on the upper...525whp E85 and C4
     
  19. SVT-NAV

    SVT-NAV New Member Established Member

    Messages:
    288
    Joined:
    Jul 27, 2012
    Location:
    Seattle, WA
    9.82 on a ported eaton?? Damn now I really wish I had e85 around here lol. But I already bought a 4 lower so I gotta stick with that. Planning on going with 2.76 and 4 lower, just waiting for a couple of members on here to let me know what they hit compared to the 2.93/4. Just want to know exactly what the diff is between the two setups.
     
  20. cobracide

    cobracide Active Member Established Member

    Messages:
    7,724
    Joined:
    Aug 23, 2002
    Location:
    Cacky Lacky, USA
    The difference is more torque, about the same hp and less efficiency. If you are going to the track, the torque will help your times. On the street, you will lose traction and heat soak quicker.
     

Share This Page