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Thread: Boost

  1. 02-02-2009, 08:28 PM #1
    mongol
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    Boost

    As you know I just bought an old sn93 kit. I'm using the stock pulleys. I know the kits are rated for 5-6 psi on a stock mustang. I also understand that boost is the measurement of restriction. So............

    I drove my car and the highest reading on my boost gauge is 4lbs. I have a trick flow cam,gt40 heads, gt40 upper and lower intakes, 73mm maf and 65mm throttlebody blah blah blah...

    Is this the reason I'm only seeing 4lb's boost?
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  2. 02-02-2009, 08:36 PM #2
    F=MA
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    Actually it's nominally rated 5 pounds at 6000 rpm, with stock pulleys, on a stock 5.0.

    Mine gauges at 4.5 pounds with stock heads and cam and makes 330 horsepower so, yeah, I wouldn't worry too much about 4.5 on an HCI car. You do need to rev it out and load it to see the real #.

    F=MA
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  3. 02-03-2009, 02:32 PM #3
    speedytang
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    Yes it is, The heads are less restrictive so your showing less PSI, but are probably producing the same power as if you seen 5-6psi.
    aaronspeed@embarqmail.com
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  4. 02-03-2009, 07:36 PM #4
    mongol
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    Good to know, thanks guy's
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