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Thread: Rpm limiter

  1. 08-05-2016 #1
    jbowen13
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    Rpm limiter

    hey guys just wondering what would be a good safe number as a max rpm on stock bottom end on a 04.5 with fluidamper, 110lb springs, hd pushrods, headstuds. its my daily driver and tow rig that pulls 20k sometimes so... i was thinking around 4200-4500 is safe. thanks in advance!
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  2. 08-05-2016 #2
    sasdakota
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    Stock turbo? Fuel upgrades?
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  3. 08-05-2016 #3
    2007 5.9
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    Frost plugs like to exit around 48-5000...so I'd say 4500 is a decent limit
    Les Szmidt
    Silver Bullet Tuning
    HP Tuners BETA Tester for 2003-2005 Cummins
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  4. 08-08-2016 #4
    jbowen13
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    Quote Originally Posted by sasdakota View Post
    Stock turbo? Fuel upgrades?
    63/68/14 .80ar non gated housing until i put twins on her. and fueling with 50hp bms injectors. thanks
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  5. 08-09-2016 #5
    Turbo_Mike
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    Quote Originally Posted by jbowen13 View Post
    63/68/14 .80ar non gated housing until i put twins on her. and fueling with 50hp bms injectors. thanks
    4800 is right where I'd stop.
    2003 305/555 QCSB Cummins
    Piston/rod/sleeve/fire ring/dual CP3/300 overs
    Super Stick NV5600
    S366/S480
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  6. 08-09-2016 #6
    jbowen13
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    Quote Originally Posted by Turbo_Mike View Post
    4800 is right where I'd stop.
    i havent hooked up my exhaust backpressure gauge yet and just got a new cummins 1.25mm headgasket after the shitty felpro failed with arp 425 studs. what do you think i should keep drive pressure below on that turbo? thanks in advance
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