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  1. DAVe3283

    June '24 Chat -- June bugs or Cicadas?

    Have you done a full pressure nitrogen test? Helped my friend diagnose a dehumidifier here that was losing charge, but no visible leak. It would only leak when operating at full pressure, but you couldn't hear/see it because of the fans moving air. Pumped it up to 450 PSI with nitrogen and soapy...
  2. DAVe3283

    June '24 Chat -- June bugs or Cicadas?

    Hey, no need to be excited for winter when we aren't even halfway through summer. There's still plenty of summer sports that need enjoying first. But it's also crazy how fast it is going. This year needs to slow down already. Sent from my FlashScan V2 using Tapatalk
  3. DAVe3283

    Oil pan drain plug crush washer

    I'd argue annealing and reusing is proper. Just not something the average person has the knowledge or tools to do, so the manufacturers say to replace it, which anyone can do. I just put a Fumoto valve on everything I own so I only take the drain plug out once for the lifetime of the vehicle...
  4. DAVe3283

    Head gasket build

    I lube with diesel, but I imagine motor oil would also work. It usually isn't that hard to get a couple oz of diesel to put in a small cup and dunk all the banjo washers in.
  5. DAVe3283

    LLY Ficm

    Oh wow, that is a very different ECU. That is what I get for assuming.
  6. DAVe3283

    LLY Ficm

    I wouldn't be surprised if the LLY ECM still shared the LS1B connectors. I know I use the exact same bench harness for the LS1B and the LB7: even the power, ground, IGN, and Class2 pins are the same, at least the handful you hook up to flash it. Sent from my FlashScan V2 using Tapatalk
  7. DAVe3283

    Got Sludge?

    Blackstone still recommends 10k+ miles changes on my Duraburb, but they dropped the recommendation from 5k to 4k on my blue truck this last sample. Guess the compound turbos (or my right foot) is harder on it than before. This is conventional oil (Delo 400). I'm all for preventative...
  8. DAVe3283

    New member, long time lurker

    If you're not touching the block or bottom end of the motor, you don't need to measure piston protrusion. You can just order the same grade of gaskets GM shipped the motor with. There are tabs that stick out past the heads with holes in them, and the location of the holes indicates which grade...
  9. DAVe3283

    LBZ Fan Clutch

    Indeed, the LBZ fans are stupid sharp on the mold/flashing lines. What I found is a deburring tool makes quick work of it, much easier/faster than sandpaper. Well worth the couple minutes it will take to not slice your hands to ribbons every time you get near the stupid thing.
  10. DAVe3283

    SAC injector whine?

    X2 on checking for a boost leak. Given all the piping had to come off for the injector job, any of those joints could be leaking now. Do be careful how you get the 30 PSI in there. On a stock turbo truck, you should only be seeing 25 PSI or so of boost, so I wouldn't go more than that. I've had...
  11. DAVe3283

    Got Sludge?

    I'm not sure I buy the additives extending fuel system life argument. I've been through my fair share of injectors (I have a weak spot for the LB7), and tried everything under the sun to extend fuel system life. The only thing that had any measurable impact was two stroke oil will help a failing...
  12. DAVe3283

    April '24 Chat --- Got Jokes?

    With it only being 2 HP, why not get a cheap VFD, then you can run it at various speeds as you see fit. Sub-3HP VFDs are usually cheaper than getting a new single phase motor. Sent from my FlashScan V2 using Tapatalk
  13. DAVe3283

    New PB

    We did have 3 people nearly lose it that day, which seemed higher than normal, so I get what you're saying. Come out to a test & tune / grudge race event with me, and we can line up next to each other. I like to think I know how to handle my truck and am not a danger to the other lane. Sent...
  14. DAVe3283

    Head gasket build

    I am running the Fleece heads on my LB7 swapped Suburban, and have no complaints or regrets. Not having to ever worry about or touch injector cups ever again is nice.
  15. DAVe3283

    New PB

    Ultimate Transmission does their own converters, so I had to call and ask. It uses "a factory orange label stator for an 8.1L trash truck" with a custom impeller they make in-house. They do use an off-the-shelf billet housing, but can't remember what brand they were using when they made my...
  16. DAVe3283

    New PB

    I do my own tuning. I have slightly refined the tune from when I had it dynoed (789HP, video & tune file shared here: https://www.duramaxdiesels.com/forum/threads/changing-turbo-setup.88837/post-1214877), but not added any fuel. I am out of injector (SAC 75%), my setup should be good to closer...
  17. DAVe3283

    New PB

    Slowly getting the transmission tune dialed in after the 6 speed conversion. It's still not totally happy or doing quite what I want it to, but it's getting closer. Took 3 tenths off my best from last year at the same MPH just by getting the power down better. Still could launch a bit harder...
  18. DAVe3283

    Passing "Smog"

    Before Idaho stopped emissions testing, we had a sniffer of sorts on the diesels. It was a different hose that hooked to the machine and it measured opacity on the throttle snap. They would hook to OBD, read any codes (but not OS/CVN), then watch the RPM for the throttle snap. You'd have to snap...
  19. DAVe3283

    Head Gaskets

    I run Mahle wave stoppers on my LB7s without any issues, and one of them makes 750/1300. Sent from my FlashScan V2 using Tapatalk
  20. DAVe3283

    Melling M561

    OK, that's not the best thing to see. A bit of flashing is jammed in the pressure relief, and I wouldn't be surprised if that eventually got pushed out and circulated through the pump into the engine. This weekend I will take the regulator apart, clean out the flashing, and do my best to...
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