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Thread: Injector size ?

  1. Top Of Page | #1
    Basic Member 300zx's Avatar

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    Injector size ?

    got a 2012 3500 6.7 cummins auto 68RFE, stock injectors, 2nd gen kit 464 turbo, 5in tb exhaust, banks intake,EFI cel, Fleece lift pump 170gph
    I really don t know what injector to go to I just keep hearing I have to upgrade to get the turbo to spool.
    The truck is used for towing 90% of the time so its well maintained pullls ok But I have a 07 with stock turbo exhaust with 50hp injectors and it just outputs this one plus
    gets about another solid 1 mpg ...
    I'm not going to upgrade the CP3,, most import thing is to get more power without smoke and better mpg..
    Suggestions ???


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  3. Top Of Page | #2
    Capt543's Avatar

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    Re: Injector size ?

    For starters your 5.9 with just 50hp sticks shouldn't be walking all over your 6.7. it's probably in your tuning . Who did your custom tunes?


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  5. Top Of Page | #3
    Basic Member 300zx's Avatar

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    Re: Injector size ?

    07.5 with 6.7


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  7. Top Of Page | #4
    Basic Member 300zx's Avatar

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    Re: Injector size ?

    Both tuned by Dragonian ..


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  9. Top Of Page | #5
    Capt543's Avatar

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    Re: Injector size ?

    Ah ok that makes some better sense. What tuning is on each?


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  11. Top Of Page | #6
    DDP's Avatar

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    Re: Injector size ?

    Quote Originally Posted by 300zx View Post
    got a 2012 3500 6.7 cummins auto 68RFE, stock injectors, 2nd gen kit 464 turbo, 5in tb exhaust, banks intake,EFI cel, Fleece lift pump 170gph
    I really don t know what injector to go to I just keep hearing I have to upgrade to get the turbo to spool.
    The truck is used for towing 90% of the time so its well maintained pullls ok But I have a 07 with stock turbo exhaust with 50hp injectors and it just outputs this one plus
    gets about another solid 1 mpg ...
    I'm not going to upgrade the CP3,, most import thing is to get more power without smoke and better mpg..
    Suggestions ???


    I’ll shoot you a message bud and see if we can get you taken care of. We have a few options that should help you out and get you to where you want to be.

    Like stated custom tuning is a big part of performance and whoever did yours may need to take a look at what’s going on in order to help get things back to where they are operating as efficiently as they can.


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  13. Top Of Page | #7
    Capt543's Avatar

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    Re: Injector size ?

    I don't have experience with them but I've heard good things about it. What kind of boost numbers do you see with the s464?


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  15. Top Of Page | #8
    Basic Member 300zx's Avatar

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    Re: Injector size ?

    Data logged and had tune checked.. Nothing but Dave said it was perfect...
    Best boost number so far is 35-40 but again I just tow with it.. so those numbers came when on steep grade or heavy wind...


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  17. Top Of Page | #9
    Capt543's Avatar

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    Re: Injector size ?

    You should be seeing those boost numbers at full throttle trailer or not .


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  19. Top Of Page | #10
    Capt543's Avatar

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    Re: Injector size ?

    But if you really want to do injectors I'd go with 90 or 100hp that 464 can keep em cool and you shouldnt need a CP3 upgrade


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