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  1. N2BRK

    Compound p/r understanding

    This ok? https://a.co/d/e3jmfZ3
  2. N2BRK

    Compound p/r understanding

    No new data yet. Just attaching the excel file from the last log. I think I'd like to add a drive pressure sensor too.
  3. N2BRK

    Compound p/r understanding

    I remember Mark saying some people hook the wastegate to the primary so it sees less signal. That’s an option too. Before going that route, i have a PPE Boost valve that I could stab in and log the difference, leaving all else alone.
  4. N2BRK

    2002 FE9

    I didn't notice anything different than the OEM that I removed.
  5. N2BRK

    Compound p/r understanding

    Oh wow! Good to know!! I do have the wastegate tightened a lot vs stock, but I can certainly go more! Fwiw - I used the wastegate hose to find the crack pressures. My stock is 7psi and max open was crazy like 90psi. My last adjustment to my stock replacement turbo’s adjustable wastegate...
  6. N2BRK

    2002 FE9

    No pics, but I did finally mount the PSC power steering pump. What an unnecessarily pain in the ass job, lol. Truck steers awesome and the brakes are better too. I was going to add a cooler, but time wasn’t allowing today. On a positive note, my father came down to visit (my bday is soon)...
  7. N2BRK

    Compound p/r understanding

    I’ll share my excel formulas and spreadsheet. I’m also going to get more sample data and let it eat in another gear higher too :). Tomorrow is power steering pump first though. Damned leaves today!
  8. N2BRK

    Compound p/r understanding

    I just found a thread on a forum that mapped our LB7 turbo and it's nothing like the one I saw here. It makes things make a lot more sense. I still can't upload here, so Post 28 link: https://www.rs25.com/threads/ihi-turbo-identification-and-compressor-map-help.198104/page-2 Now I can see...
  9. N2BRK

    Compound p/r understanding

    and I just realized that the IHI idea at the end is BS. Max effort at 31psi is like 500hp and that's more like 2x the lb/min I guesstimated. It's so far off the IHI map that it threw me for a loop and I don't know WTF to think now. LOL
  10. N2BRK

    Compound p/r understanding

    My ihi P/R rises to 1.88 (1.62 on the s475 at that point), and then as the wastegate opens it drops. I show that as 12.76lbs of boost. At the highest boost I’ve logged (51.587), I was 1.43 p/r on the ihi and 3.15 on the s475. I get what you’re saying about sharing the load “better” , but...
  11. N2BRK

    Compound p/r understanding

    That was one of my (many) initial stumbling blocks :) I'm interested in your setup where you defeated the wastegate. I'm seeing how that could actually be a great idea. I am concerned though about how much EGT I'm seeing as I tighten the wastegate though.
  12. N2BRK

    Compound p/r understanding

    Post 11: https://www.duramaxdiesels.com/forum/threads/understanding-compound-boost-numbers.63279/
  13. N2BRK

    Compound p/r understanding

    I don’t think you can just add them to come up to total boost, since the secondary isn’t breathing at 14.7.
  14. N2BRK

    Compound p/r understanding

    Sea level here :)
  15. N2BRK

    Gauge needle repositioning

    Cool! Thanks, and “Bone-appa-titty” with your new three prong fork, lol.
  16. N2BRK

    Gauge needle repositioning

    My OEM coolant temp needle is way off, but the pid reads correctly. Can I pull the needle off the gauge and re-clock, or is it keyed to fit the shaft in only one position? Thanks in advance! Wally
  17. N2BRK

    Compound p/r understanding

    I tried to upload the excel file as a zip file, and I keep getting an error: "A server error occurred. Please try again later.". It's been like this for a couple days with pictures too... did James get DEF in the server???? @Chevy1925
  18. N2BRK

    Compound p/r understanding

    Yes, Sir!
  19. N2BRK

    Compound p/r understanding

    I'm a little over a year older and maybe a little smarter about how this works now, LOL. My calculations were also off a little too. I went back to Idaho Rob's posts and I'm back playing with it tonight, and I found some interesting things. I increased the wastegate tension a couple times...
  20. N2BRK

    2002 FE9

    Yes, Lucille is the sweet one that I found first. Not the huge Rottweiler I found the week after.
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