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Thread: Good start tune for Radix 2bar and cos3?

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    Member Ritch's Avatar
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    Feb 2007
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    Default Good start tune for Radix 2bar and cos3?

    I'm wondering how my tune looks to more experiences eyes.

    I'm just starting to tune the truck now that the Radix Magnacharger is installed. The vehicle is a 1999 Sierra with original PCM. I have it running now using COS3 1250003. The camshaft is a Comp XR275HR and engine is the LM7 5.3L The MAP is new matching Cobalt SS part. There are no other mods except valve springs and full exhaust without cats. My next step is to get the olod LC-1 wideband working and then work on the VE tables. Did I miss anything obvious? This is my first blower/COS tune.

    It was running ok. Last month I did full dual exhaust with headers and now with COS3. Throttle blip bogs from idle. Attached is a short log. I haven't tried it in gear yet.

    Cheers
    Attached Files Attached Files
    ____________________________
    1999 GMC, rcsb, 2wd, 5.3, XR275HR-12
    Radix magnacharger mp112
    Long tubes true duals, $L60E

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