kzimmer

The 7x.013's are in. I set the pop pressures around 365 bar. The truck starts, idles, runs, and drives fine. I didn't have time for any tuning tonight since I had to take the family to the rodeo. I've had a couple very minor stalling problems, that were likely partly due to unrelated battery voltage issues. Either way I'm pretty sure I'll need a retune in a big way. My 0 psi level is likely way too low. Hopefully tomorrow... If I finish putting up the Christmas lights before the kids go for a nap...

If it's PWM you might be in trouble.

Here is a really fast and crude diagram on how this could be accomplished. I apologize for the chicken scratch. There is definitely more than one method to accomplish this. This is one.

Can you use two digital outputs from the Arduino, both triggering relays? One output for open, triggering a relay that switches +12v, the other for close, triggering -12v. If you do, get a relay with auxiliary contacts so you have a little bit of protection. Like a forward/reverse motor starter circuit.

Excellent, thank you sir. I'll flash it this weekend.

I don't want to answer that. I think it would completely dependent on how far off the adjustment is. Safe answer would be 'no'. Make sure you read through the how-to article on here a few times and get a really good understanding of which valves to do at TDC and which valves to do at BDC. You should feel some resistance on the feeler gauge. It should not bite or bind, but you also shouldn't be able to 'wiggle' it or feel slop, if that makes sense. When I do it, I start to tighten it so it's close, and if it's a little bit loose, tighten the locknut at the same time as the adjustment screw to make up the extra.

Make sure you follow the procedure in the article section here. Cold engine.

I wish I could have data logged. Still haven't solved that bug with the app on my device. Some day.

No problem, I didn't realize you knew about it. All part of testing. Let me know if there's any information I can collect to help.

So I was climbing a bit of a grade today and things felt a little funny. Near the top I noticed that RPM's were not changing. And then I noticed that the only things that were updating for sure were fuel pressure, trans temp, and egt; things that are direct to the quad and not through the ECM. So the app was still running, Bluetooth connected. As you will see in the attached pictures, I dropped to 3rd to get the rpms up and the quad's values stayed the same. I could hear the difference in timing, so I thought maybe the timing was stuck on the displayed 15.46°. But I soon realized that the quad had just dropped off the map completely and the factory tuning was in control. I could verify this by stepping on the go pedal and blacking out the sun. Shut down the truck and restarted. Quad came back online. Didn't happen again in the 75km I had left to my house. I'm a bit concerned here though. This can't happen when my trailer is behind the truck, or when my wife is driving the truck.

Sounds good. No more decimals for this guy. Except with timing. And maybe fuel.

I'll definitely try this next time I'm in the truck. Might not be until Friday. @Me78569 do you know if this variable is a floating point or just an integer? @Quadzilla Power might be able to help.

@Me78569 I thought I'd make a new post instead of pm'ing or stuffing this into an old thread. I decided to calibrate the new MPG feature. I started at a MPG offset of %150. I reset the gallon trip and drove 350.3kms. Gallon trip showed 13.9 Gallons, and I put in 14.719 gallons. So 150%{1+[(14.719-13.9)÷13.9]} = 158.838%. Key on, truck not running, quad open and connected. Went to settings, changed MPG offset from %150 to %158.84. Instant crash. And now every time I open the app it instant crashes, even after device reboot and truck key off/on. I'm guessing that if I clear cache and data from the app, it'll come up again. And if I do that I'll lose my tune since I've made a couple changes and I don't have a backup because the exporting feature is still bugged for my device. So I guess when I have time I'll go through the directories and try to manually export the tune before I wipe the app. One thing to note is I did not turn off mpg offset in settings before I changed 150 to 158.84. All in good fun and f bombs, haha.

Yessir. When this happens, the tune apply progress stays at zero, and usually flashes "device disconnected" I think. I can't remember the message for sure, but it flashes briefly once and fades away.

Connection issues have been very frustrating the last couple weeks. Whenever I get into the truck it takes several key cycles and often several minutes to get the app to connect. Often throw a few android reboots in there too for good measure. But here's the weird thing... Whenever this happens, android Bluetooth manager shows a connection. Today I went stopped to fuel up, quad running. Shut the truck off (android shuts off too). Started the truck, android boots up, no connection in app. Took 5-10 minutes of messing around to get a connection again. It's a crapshoot whether or not it'll connect.

7x.013 VCO nozzles and shim kit are on the way, thanks to @dieselautopower

340ish... haha. Regretfully, I haven't driven it a lot. Just on weekend errands. The wife has been driving it. The little bit of driving I have done, shows things are going very well. Smokes a little less in low PSI, just a nice haze if I beat on it. Spools quick, and seems to wake up a lot more at 2000-2500 RPM now as compared to before. Not sure I can explain that one. No negative effects whatsoever. One thing to note, is my cold starts have improved greatly. It was -25C the other morning and the truck wasn't plugged in overnight, as I was finishing my new receptacle that afternoon. It fired up like summer almost. I haven't had a diesel start that good in winter since I had my old 1st gen. The VW TDI cranked over about 3 times and the battery died, haha. I may order a set of 7x.013 honed nozzles from DAP and bump it up to 360 bar. If these cheap nozzles run this much better with higher that factory pop pressures, I can't wait to see how a quality set does at 360 BAR. When I'm happy with nozzles and pop pressure, I just may make it to the Dyno for some timing tuning and steady state logging in the new year.

The 5.9 block is missing lol. @killer223 do you know what is involved with retrofitting a 5.9 head on a 6.7 block? I think a quad tuned vp44 6.7 in a 2nd gen would be cool. Completely unnecessary, but cool.

Is that a 5.9 12 valve head on a 6.7 block by chance?

That would be great. Everything I've read says 205-210 ect expect the fan to lock up.

Sounds good, thanks fellas. I actually ended up ordering one last night. Trying to get it here before the weekend so I can put it in before a short road trip this weekend. The only concern I have is summer time, and the engine fan cycling when it shouldn't be needed, which would hurt efficiency. If I find that happens, I'll throw a 190 in. I wish there was a 195.

That's not quite what I was getting at. Assume I'm running the quad, timing is limited to my settings regardless of ECT. Is there data that exists to suggest the ideal running temperature? Am I losing efficiency or longevity at 180 rather than 190 or 200? Hope that makes sense. I've done some searching but I can only find speculation, aside from a study that @pepsi71ocean did on CF, but I am still very curious.

Sorry to hijack, quick question. Is there any benefit to running that hot aside from getting more heat out of the vents? 180, 190, 200, what's the best temperature and why? Would love to see some data to support the answer. Again, this is a blatant hijack, OP if you aren't ok with it please let me know and I'll make my own post.

That makes sense. Thanks for clearing that up.

Aaaaaaaaaair