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Tuning Issues - Loss of HP

Discussion in 'Performance and Tuning' started by AZWildcat, Nov 5, 2012.

  1. Nov 5, 2012 at 8:02 PM
    #1
    AZWildcat

    AZWildcat [OP] N7NMI

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    Rick
    Denver
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    03 Attack Tacoma 4x4 S/C
    too many mods to list
    Alright Guys and Gals here is my first post since becoming a member.

    I recently decided to make a few upgrades to my 03 Tacoma. It has had a S/C since it left the dealership in 03. So put the URD 7th injector and 2.2 pulley, did a deck plate mod, and threw on some JBA short tubes (bitch to put on alone). A few days later I took it to get tuned (hey, I have a piggy back now! - let's tune it baby!!!)

    Here'e the let down. The tuner I went to could not get this truck to stop losing power in the 3500 rpm range. He pulled timing, pulled fuel, added fuel - nothing worked. He pulled up previous 03 Tacomas and found a similar trend with em. He attributed it to "supercharger resonance". I had the S/C retorqued at the dealership. Still this problem is present, and it is VERY annoying. I attached the charts from the tune (yes, it was a few months ago...)

    any ideas? questions I can clarify? I want ideas before I spend money on another tuning session.

    thank you in advance for any ideas/suggestion/solutions <---that would be awesome.

    T BOOST.jpg
    T POWER.jpg
     
  2. Nov 6, 2012 at 7:16 AM
    #2
    Torspd

    Torspd Tor-nication

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    Is your belt slipping? That 2.2 pulley is the URD Supergrip pulley correct? It is designed to help prevent belt slippage. So first thing I would check is to make sure the belt tensioner is nice and tight.

    There was a guy on Custom Tacos that found that if he flipped something with the s/c tensioner he picked up extra psi from a lack of slippage. Bwil was his name I believe.

    Looking at your pictures, you can see a drop in boost at the same rpm where there is a drop in power. To me, that is due to belt slippage.
     
  3. Nov 7, 2012 at 6:52 AM
    #3
    AZWildcat

    AZWildcat [OP] N7NMI

    Joined:
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    Member:
    #82919
    Messages:
    27
    Gender:
    Male
    First Name:
    Rick
    Denver
    Vehicle:
    03 Attack Tacoma 4x4 S/C
    too many mods to list
    Thanks for the idea. Yes, the 2.2 pulley I have is the URD supergrip.

    I had not thought of belt slippage and I'll double check the tensioner. I'll also go over to custom tacos and see what I can find out there. Thank you again.
     
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