2-step/EGTs ??????

Discussion in 'PSI Superchargers Tech Questions' started by Blown5402, Jul 27, 2013.

  1. Blown5402

    Blown5402 Member

    Joined:
    Aug 12, 2011
    Messages:
    577
    Likes Received:
    8
    What is a good target for EGTs when on the 2-step? I thought I would not need to lean on the 2-step, but really loosing temperature fast when going on the 2-step-THANKS! Jim
     
    #1
    Blown5402, Jul 27, 2013
  2. Mike Canter

    Mike Canter Top Dragster
    Staff Member

    Joined:
    Mar 10, 2004
    Messages:
    4,630
    Likes Received:
    189
    Do you have a flow meter on your data logger? If so what GPM are you seeing when on the Two Step?
     
    #2
    Mike Canter, Jul 27, 2013
  3. Blown5402

    Blown5402 Member

    Joined:
    Aug 12, 2011
    Messages:
    577
    Likes Received:
    8
    Flowmeter Results on the 2-step

    I am seeing 4.82gpm on the flowmeter when on the 2-step. My EGTs are going down below 400 degrees average and 3 cylinders are below 250 degrees. I am so fat or just too cold for the engine to make any power and cannot get up on the tire to get moving with a 1.03 60' and this is with a 2560# car with a blown hemi at 49#s of boost, with 43#s on the 2-step. Any help or ideas would be appreciated to get the car up in the power band-THANKS! Jim
     
    #3
    Blown5402, Jul 27, 2013
  4. Blown5402

    Blown5402 Member

    Joined:
    Aug 12, 2011
    Messages:
    577
    Likes Received:
    8
    3000 rpm on the 2-step

    Mike, the RacePak flowmeter is showing the 4.82 gpm at 3000rpm with a converter on the 2-step-THANKS! Jim
     
    #4
    Blown5402, Jul 27, 2013
  5. rb0804

    rb0804 Active Member

    Joined:
    Aug 7, 2010
    Messages:
    671
    Likes Received:
    38
    You go full throttle on the two step?
     
    #5
    rb0804, Jul 27, 2013
  6. Blown5402

    Blown5402 Member

    Joined:
    Aug 12, 2011
    Messages:
    577
    Likes Received:
    8
    YES, wide open throttle

    YES, wide open throttle, NO air solenoid or etc. THANKS! Jim
     
    #6
    Blown5402, Jul 27, 2013
  7. Mike Canter

    Mike Canter Top Dragster
    Staff Member

    Joined:
    Mar 10, 2004
    Messages:
    4,630
    Likes Received:
    189
    Is this a Roots or screw blower car. How much timing are you pulling out when on the Two Step. That us a real low EGT for that fuel flow. You need yo be up around 625 yo 675 average. I think that since your stage rpm is only at 3000 rpm you are just going to have to reduce the fuel flow via jetting in the lean out solenoid until the EGTs come up. I have seen some cars that have to run dual lean out solenoids to get the fuel out
     
    #7
    Last edited: Jul 28, 2013
    Mike Canter, Jul 28, 2013
  8. Blown5402

    Blown5402 Member

    Joined:
    Aug 12, 2011
    Messages:
    577
    Likes Received:
    8
    Whipple at 60% over/49#s

    Mike, it is a Whipple at 60% over making 49#s of boost when leaving and 43#s of boost on the 2-step. I do have 8 to 12 degrees (that has been tried so far) of timing retard when on the 2-step. I do need to start up on the 2-step rpm also, but have just made 2 passes with a new car and motor combo to me. What size leanout pill would you start out with the fuel flow that I have now? I put a .050 in last night, but think I may need even more to start with? I just need more heat and maybe the engine will make some power and get up on the tire. It is pretty well dead hooking now and cannot get in the power band that I need for the motor-THANKS for anymore help in advance-Jim from TN
     
    #8
    Blown5402, Jul 28, 2013
  9. Mike Canter

    Mike Canter Top Dragster
    Staff Member

    Joined:
    Mar 10, 2004
    Messages:
    4,630
    Likes Received:
    189
    That's interesting. Something not right in the fuel system. With that much boost on the Two Step then you should have more fuel flow at staging than you have now. With only 4.83 GPM your EGTs should be way up there. The problem most likely is the amount of retard is killing it but having that much retard is not uncommon. If your 60fts are that bad then you need to do something. It sounds like you need less retard.
     
    #9
    Mike Canter, Jul 28, 2013
  10. Blown5402

    Blown5402 Member

    Joined:
    Aug 12, 2011
    Messages:
    577
    Likes Received:
    8
    Thank you

    I am going to a 34.5" tire next from a 36". I am taking less timing out, leaning more on the fuel system (EGTs are averaging 900 degrees through the run), stepping up the launch rpm some and maybe getting the 60' where it should be. THANK YOU for your help and advice! I will give you a report back when making another run-THANKS! Jim
     
    #10
    Blown5402, Jul 28, 2013

Share This Page





XenPorta 2 PRO © Jason Axelrod from 8WAYRUN.COM