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memario1214's JAFR Build

Discussion in '2nd Gen. Builds (2005-2015)' started by memario1214, Oct 6, 2011.

  1. Apr 29, 2013 at 4:20 PM
    #781
    memario1214

    memario1214 [OP] Hotshot Offroad Moderator Vendor

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    No shit man... And thanks :)


    For all others, the JAFR is now Boosted! :yay: Initial review is that I didn't have as much power as I expected I would. Take into account that I am rolling on 33" mud tires too. Also, there is absolutely crazy amounts of wind here today which made it really hard to judge as I was getting thrown around on the road. I feel as though the ECU is still learning some stuff as well. Whether or not it is worth $4k is yet to be determined, but initial thoughts are that I am happy, but was expecting a little more. I did find that I got up to 70 in a hurry when I romped on it. I will make a video comparison here in the next few days which will show the differences. I am also getting some new tires which I feel will help my cause a lot! I did powerslide it through like the busiest intersection in town already though lol.
     
    Last edited: Apr 29, 2013
  2. Apr 29, 2013 at 4:54 PM
    #782
    BrokenTusk

    BrokenTusk I support a velociraptor free workplace.

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    Overdrive pulley on the S/C?? :spy:

    Could also be your 5500 ft worth of elevation. Remember I was telling you my taco was pretty gutless up there compared to what I was used too.
     
  3. Apr 29, 2013 at 4:56 PM
    #783
    MTgirl

    MTgirl too many frogs, not enough princes... Moderator

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    didn't seem that way when you whizzed past me on the interstate :rolleyes:
     
  4. Apr 29, 2013 at 5:00 PM
    #784
    BrokenTusk

    BrokenTusk I support a velociraptor free workplace.

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    Exactly. I was slowed down enough that you actually saw something pass you. :cool:
     
  5. Apr 29, 2013 at 5:04 PM
    #785
    memario1214

    memario1214 [OP] Hotshot Offroad Moderator Vendor

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    I'm sure the elevation doesn't help! Didn't really think about that. I will run it like this for a while and see how it does with my new tires, supporting mods, and other shtuff...

    Haha oh Marcel
     
  6. Apr 29, 2013 at 5:05 PM
    #786
    BrokenTusk

    BrokenTusk I support a velociraptor free workplace.

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    General rule is -8 hp for every 1000 ft above sea level. Adds up pretty quick
     
  7. Apr 29, 2013 at 5:10 PM
    #787
    memario1214

    memario1214 [OP] Hotshot Offroad Moderator Vendor

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    So I'm like 40 horse down? Ouch... I remember when I drove it to Minnesota a couple summers ago it ripped. It should do much better this summer at near sea level lol
     
  8. Apr 29, 2013 at 5:11 PM
    #788
    BrokenTusk

    BrokenTusk I support a velociraptor free workplace.

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    haha, yup, makes a big difference man. Remember when I got my dyno on the xrunner with intake/chip/exhaust and only pulled 176 hp? The dyno shop in Calgary I was at was at 2700 ft.
     
  9. Apr 29, 2013 at 5:17 PM
    #789
    memario1214

    memario1214 [OP] Hotshot Offroad Moderator Vendor

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    Just found a calculation online for how to determine power loss at elevation. The calculation is:

    HP LOSS = ([elevation in feet] x 0.03 x [HP at sea level]) / 1000

    If that's true, I'll just assume that I am at 300hp-ish... I'm approx 1 mi above sea level here (5280 feet) which would come out to a 15.84% loss of power or 47 hp which would put me at 253hp :eek:! Makes me feel better though
     
    Last edited: Apr 29, 2013
  10. Apr 29, 2013 at 8:38 PM
    #790
    Blackdawg

    Blackdawg Dr. Frankenstein

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    This makes sense. Finally got a Boost gauge on my dads. Only hits 6.5psi max and we have the smaller pulley wheel on it. We are at 4800 feet i think..or 4200..can't remember.

    Get a Uconn and 7th injector and smaller wheel :D
     
  11. Apr 29, 2013 at 9:16 PM
    #791
    memario1214

    memario1214 [OP] Hotshot Offroad Moderator Vendor

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    I might go with a smaller pulley, but in lieu of the UCON and 7th I will likely do the FPR mod and get larger injectors... And then proceed from there :) I'm gonna go a while before I mod more. I need to get down to Texas this summer and see how she runs and the way I am sitting now I feel as though I can do it reliably. Only things planned between now and June would be a bung welded into the collector of my headers for my AFR gauge and purchase/install of a boost gauge.
     
  12. Apr 29, 2013 at 9:18 PM
    #792
    memario1214

    memario1214 [OP] Hotshot Offroad Moderator Vendor

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    Just remember that intake/exhaust/headers will lower your reported boost number while still providing more power. From what I have read your dad's truck is where it should be.
     
  13. Apr 29, 2013 at 9:38 PM
    #793
    Jerez

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    im jelly :jellydance:
     
  14. Apr 29, 2013 at 9:40 PM
    #794
    Blackdawg

    Blackdawg Dr. Frankenstein

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    Oh?? do tell..
     
  15. Apr 29, 2013 at 10:13 PM
    #795
    memario1214

    memario1214 [OP] Hotshot Offroad Moderator Vendor

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    Yeah... I'm sure Mark knows and I'll see if I cant scratch up the site I read it from tomorrow sometime
     
  16. Apr 30, 2013 at 7:24 AM
    #796
    BrokenTusk

    BrokenTusk I support a velociraptor free workplace.

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  17. Apr 30, 2013 at 7:26 AM
    #797
    BrokenTusk

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    Using an educated guess:
    The larger intakes/exhaust allow more room for the compressed gasses to expand. Thus lowering the peak pressure even though its the same volume of air just spread out over a larger space.
     
  18. Apr 30, 2013 at 7:50 AM
    #798
    MadToy

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  19. Apr 30, 2013 at 8:33 AM
    #799
    Torspd

    Torspd Tor-nication

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    It is natural for the manifold pressure to drop a little with increased flowing components.

    Example: Snake bite on stock block made 16psi. After an engine rebuild, same compression, but with heavy porting on lower plenum and heads, and the same pulley, the new reading was ~12psi.
     
  20. Apr 30, 2013 at 8:45 AM
    #800
    Blackdawg

    Blackdawg Dr. Frankenstein

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    but that was changing the head itself..which makes sense.

    I don't see how changing the exhaust and intake as anything to do with that..

    the only place that sees the boost pressure is in the manifold(which is the SC) and inside the head..other then that..no where else does.
     

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