1. This site uses cookies. By continuing to use this site, you are agreeing to our use of cookies. Learn More.

CRX b18 ls turbo 450 whp

Discussion in 'Forced Induction' started by Stoneaxe, Jan 22, 2008.

  1. Stoneaxe

    Stoneaxe New Member

    Messages:
    2
    Likes Received:
    0
    Joined:
    Jan 20, 2008
    I have a built b18a1 in my crx. It dynoed at 230whp at 8 psi (pushing 14 now) on a 42 trim turbo. I want to get about 430-450whp at 20-25 psi w/ quickest possible spool.
    ------------------------------------------------------------------------------
    Here is my setup:
    B18a1 low w/ original mileage
    8:5:1 JE pistons
    Stock crank/ fidanza 7lb flywheel
    Eagle rods / arp bolts, arp head studs
    450 cc dsms
    Block guard
    Garrett .42 a/r compressor; .48 exhaust; stage 4 turbine/compressor wheel
    3in full thermal
    Rev hard manifold, tial 38mm wastgate
    Neptuned
    ------------------------------------------------------------------------------
    Would 420+hp be possible with my setup? What would be a good turbo to reach this goal? What size injectors would should I get?
     
  2. Stoneaxe

    Stoneaxe New Member

    Messages:
    2
    Likes Received:
    0
    Joined:
    Jan 20, 2008
    anyone?
     
  3. Jdm ls turbo Eg

    Jdm ls turbo Eg New Member

    Messages:
    2
    Likes Received:
    0
    Joined:
    Feb 16, 2009
    I have 855 cc rc injectors on my ls turbo and low compession pistons and my car is pushing 250 whp at 17.5 psi
     
  4. Briansol

    Briansol Admins Admin VIP

    Messages:
    21,456
    Likes Received:
    2,117
    Joined:
    Nov 18, 2007
    Location:
    CT
    if you want better spool, you're going to need higher compression pistons (9.5-10:1) and ball bearing turbo like a gt30
     
  5. dadsdx

    dadsdx New Member

    Messages:
    6
    Likes Received:
    0
    Joined:
    Jan 20, 2008
    running precision 680cc pushing 411whp @18lbs. 450cc injectors seem to small for the power your looking for.
     
  6. silver

    silver Senior Member

    Messages:
    708
    Likes Received:
    2
    Joined:
    Nov 15, 2002
    Location:
    St. Louis
    Sort of an old thread, but I'll ad this for whoever searches.

    At 43 psi base fuel pressure, 450cc injectors will be flowing 3.01 lbs/min of fuel at 100% IDC. To get 450 whp, you'll need anywhere from 41-50 lbs/min of airflow, depending on how efficient your setup and tuning is (essentially your BSFC). Assuming you can get 10 whp out of 1 lbs/min airflow, you'll need 45 lbs/min airflow. With only 3.01 lbs/min of fuel to feed that airflow, you would have to run close to a 15:1 AFR to get there.

    Assuming you're not insane and want something like an 11:1 AFR at 85% IDC, you would need ~720cc/min of fuel flow. So in terms of standard injector sizes, you would want 750cc/min injectors.
     
  7. LsTec

    LsTec civic525whp

    Messages:
    37
    Likes Received:
    1
    Joined:
    May 30, 2008
    Location:
    out side philly
    If your goal is 450whp I'd just go with 1200cc injectors, you can always lean them out. Then you always have room to grow. Your going to need a fuel pump, and as far as the turbo goes if you want to spend the money go with the borgwarner bullseye s362, it's the best thing i ever bought for my car...
     
  8. Matts96HB

    Matts96HB . Moderator VIP

    Messages:
    6,483
    Likes Received:
    390
    Joined:
    Apr 16, 2006
    ..At the expense of idle quality. Properly sized injectors for the goal would be ideal.
     
  9. austin20110

    austin20110 New Member

    Messages:
    1,272
    Likes Received:
    30
    Joined:
    Sep 24, 2008
    Location:
    Northern Va
    some 750's would be fine... maybe a tad bit overkill
     
Verification:
Draft saved Draft deleted

Share This Page