Roots Enderle Idle Egt

Discussion in 'PSI Superchargers Tech Questions' started by Bjs344, Aug 16, 2014.

  1. Bjs344

    Bjs344 Member

    Joined:
    Sep 10, 2013
    Messages:
    358
    Likes Received:
    24
    1471 hhr littlefield bbc. Delta is centered on intake. Each side, from front to back, has 3 hat nozzles, 4th is plugged, nozzle in the blower, next nozzle hole in the blower is plugged, then one pointed down in the back of the blower.

    5 and 6 drop below 400 at idle while 7 and 8 will get close to 900. Front four around 700. This is after richening the barrel valve one full turn to control temps better. I also added 2 to the rear most blower nozzle but it didn't do much, might have even cooled off 5 and 6. Front hat nozzles are 52 down to 48 on the back.

    Egts on 5 and 6 don't recover until well into high gear according to logger. Wondering how much I'm leaving on the table?
     
    #1
    Bjs344, Aug 16, 2014
  2. Mike Canter

    Mike Canter Top Dragster
    Staff Member

    Joined:
    Mar 10, 2004
    Messages:
    4,630
    Likes Received:
    189
    Changing the hat nozzle size will change all the EGTs for all cylinders because the hat fuel is mixed with the air and flows to all cylinders. Everybody has this problem and you just have to find a middle temp and live with it.
     
    #2
    Mike Canter, Aug 16, 2014
  3. promodracer

    promodracer Member

    Joined:
    Jan 8, 2008
    Messages:
    359
    Likes Received:
    2
    That's good to know its not just me!
     
    #3
    promodracer, Aug 18, 2014
  4. Mike Canter

    Mike Canter Top Dragster
    Staff Member

    Joined:
    Mar 10, 2004
    Messages:
    4,630
    Likes Received:
    189
    It is far more important to have the EGTs closer during staging
     
    #4
    Mike Canter, Aug 19, 2014
  5. Bjs344

    Bjs344 Member

    Joined:
    Sep 10, 2013
    Messages:
    358
    Likes Received:
    24
    Since I stage at idle and go wot on the 2 step, 5 and 6 go cold to colder and take awhile to recover. I guess a bypass would help. How do I know how hot is too hot on 7 and 8 at idle and on the 2 step?
     
    #5
    Bjs344, Aug 19, 2014
  6. Mike Canter

    Mike Canter Top Dragster
    Staff Member

    Joined:
    Mar 10, 2004
    Messages:
    4,630
    Likes Received:
    189
    An average EGT at stage is 625*. Yes a two step bypass will help.
     
    #6
    Mike Canter, Aug 19, 2014

Share This Page





XenPorta 2 PRO © Jason Axelrod from 8WAYRUN.COM