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How much boost?

Discussion in 'SVT Shelby GT500' started by Venomous94Cobra, Jul 7, 2019.

  1. Venomous94Cobra

    Venomous94Cobra Member Established Member

    Messages:
    209
    Joined:
    Jun 12, 2011
    Location:
    memphis tn
    Hey guys I'm trying to figure out something on my cars setup, I'll put a list of my setup below but I want to see what you thing my boost pressure should be. The car is a 2010 (bastard child) completely untouched long block.

    Whipple 2.9 gen 3
    3.250 upper
    Stock lower
    Ford CJ TWIN 65
    whipple 123 intake
    KB biggun intercooler
    Afcon triple pass HE with fans
    170* thermostat
    ID1300x
    BAP
    Kooks 1 7/8 headers
    Kooks 3" o/r H pipe
    Kooks 3" exhaust system
    Aluminum driveshaft
    3.73 gear
    Lund tuned
     
  2. SCGallo2

    SCGallo2 Balanced performance Established Member

    Messages:
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    Joined:
    Mar 4, 2014
    Location:
    Southern MD
    At sea level, I think you would be at 14-15 psi at 6200 rpm. On 93 octane, you can safely run a 3.0" upper pulley with the stock lower. In my opinion, you are under spinning the blower. How does it run?
     
  3. Venomous94Cobra

    Venomous94Cobra Member Established Member

    Messages:
    209
    Joined:
    Jun 12, 2011
    Location:
    memphis tn
    We're about 2000ft, its showing only 12-13psi on a mechanical gauge, it runs ok but but I feel like it's only making maybe 600whp, Lund has 20-21* of timing in it.
     
  4. SCGallo2

    SCGallo2 Balanced performance Established Member

    Messages:
    919
    Joined:
    Mar 4, 2014
    Location:
    Southern MD
    Between your KB biggun intercooler and Kooks full exhaust, it appears you moderately reduced airflow restrictions. If fuel quality is not an issue, crank the boost up to 16-17 psi with an upper pulley only or upper and lower pulley combination and you should be around 700whp, even with 3.73 rear gears. I have been tuned by Lund Racing and currently JDM Engineering, and with quality pump gas you can keep aggressive timing.
     

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