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Recent content by quadstar87

  1. quadstar87

    6.5l high flow upper.

    We designed it out of necessity when noticing in pressure ratio logs that we clearly had a restriction in the intake somewhere. The instant benefit is lower IAT lower boost MAP vs drive pressure because you aren't trying to move air through a restricted area. For example, if you have an HX35 on...
  2. quadstar87

    Newer ds4 injection pump

    It's 12v, we've spun one on the test bench before. The '99 PCM will run it but requires on-site custom tuning due to the cam ring mods.
  3. quadstar87

    Quadstar Tune

    That's a valid concern for locked upshifts but that's a separate toggle you can prevent from happening even if the converter is set to stay locked on decel at higher speeds. I use custom torque management with the DS4 pumps on the hard 1-2 shift..something i've never seen anyone else use on...
  4. quadstar87

    ARP main stud instructions

    Calls are slow in the busiest time of year. Always feel free to message through here or email and we'll get back to you, even over a weekend. Sorry for the delay in getting that to you.
  5. quadstar87

    2008 GMC Envoy Denali

    Don't build the motor then find the frame is rotted near the trans cross member like we did on my trailblazer SS 😆😆. It's fixed now but was a fun few weeks scrambling around.
  6. quadstar87

    Working on a "next-level" fuel system

    Step away from the norm and try things that are more unique. The manufacturers don't always have all the answers, especially for a 20+ year old application. These can have a pre set regulator in the fuel bucket inside the tank or an external regulator with dedicated return. We run 1/2" line up...
  7. quadstar87

    We are LIVE

    Awww c'mon ; ) I posted mine. Doesn't mean crap till it runs! reliably
  8. quadstar87

    Holset HE 351 6.5 Potential?

    Was that a single or multi disk TCC?
  9. quadstar87

    Injection pump ds4

    It's a joint effort and not a complete reality yet until I get it on an engine. Small changes in output really screw around with what pulse width and advance curve you need. I can post more about it if I'm allowed to here. https://www.facebook.com/QuadstarTuning/posts/2024045261172670
  10. quadstar87

    Kodiak Fuel Filter Upgrade

    The inline filter? They are fine if you replace them every couple oil changes. Maybe not the best choice if you run a lot of miles, though. Many factors to consider when designing a system. One of the reasons we don't sell a kit. Because we'd have to carry three or four setups to suit everyone...
  11. quadstar87

    Kodiak Fuel Filter Upgrade

    Not sure why it's not loading. They are Google cloud share listings that are open to the public. It does take a few seconds to load.
  12. quadstar87

    Kodiak Fuel Filter Upgrade

    The FASS install document with a DMAX filter info is free to use on my website. https://quadstartuning.com/pages/documentation
  13. quadstar87

    Hummer p0216

    Scan "Desired Timing" "Actual Timing" and "TDCO or Top Dead Center Offset" before you change anything. See if Desired and Actual match and note the TDCO value. Then, put it into re-learn and see if the TDCO value learns differently. If the pump needs moved, you'll know after it tries to learn...
  14. quadstar87

    99 6.5L Stalling out, tried "everything"(?!)

    I noticed you said you replaced the tank sending unit. Did you verify it came with the correct strainer sock during install? This is a big issue on this platform with the replacement parts because no matter how good your lift pump is, it can't work if there isn't enough fuel getting to it.
  15. quadstar87

    Hummer p0216

    You have to physically move the pump to set base timing/TDCO. It's a mechanical setting that gets learned into the computer.