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A friend mentioned that style. Any good diagrams of the setup?

Drive it daily. Its great. Keeps temp perfect. Tows what I need to. Still some relays and wiring to finish for my cold days intake heater etc. The pair of duramax intake heaters work great by the way below freezing. Trans controller feels settled. Oil analysis just came back clean and average...

Mmmmm. Got too focused. Missed that. Thanks! Done.

Still looking good. My midrange drone was solved by bolting an exhaust flange back together that had come loose a foot before my muffler....happens. And my engine started pushing a lot of oil out of the crankcase on one 3 hr drive. I suspected vacuume leak and plugged the vac pump, disconnecting...

I had it built. My converter builder says that anyone advertising a really low stall 4L80e converter is lying. They dont make components to put together a 1200 rpm stall 4l80e. He put in a billet piston, HD clutch, and set the clearances tight on the 2 halves. Then he custom tweaked the curl on...

Mixed city / Hwy is 19.5 mpg (imperial). That is impressive for a H1!

I'm in full lockup mode now after a delay of about 3 seconds in 3rd and 4th. Much better. It locks which feels like its gone into 5th gear and then stays locked. You can pour on the fuel, the boost guage hits 30+ and the whole crazy tractor just keeps building speed. Even uphill. It's great. A...

All very good info. I'm starting to learn the "pace" of waiting for lockup then adding power. Here's a screenshot of my variables I've been playing with.

I managed to get within a degree or 2 of the stock angle with lowrams advice. I'm happy with the result. There are so many components engineered in a really tight place. Some say its stupid. I say genius. The 6 is longer than the 8 and just highlights the skewed placement more acutely. Its funny.

I can adjust the % of torque converter lockup. Should I dial it up?

Very helpful. Partly I'm just getting educated on the role of a TC and what its for. I've reset the lockup parameters to remain in lockup when I mash the throttle instead of breaking lockup after 70% throttle. Big difference. It stays locked, builds boost and power. Thanks! As well in my setup...

I have new respect for transmission tuners... It's not as straightforward as it seems. A Hummer is about 7500 lbs, the final drive reduction is almost 5:1, tires are 37" stock. It makes for a weird setup. The H1 spends most of it's time in 4th gear. Torque converter Lockup seems to make the best...

Mine is pulsing. Headlights and dash lights. You can hear it at idle too. It's because the regulator is not getting a clean power reading from the battery. I spurred off another subsystem for ignition switched power to the regulator an it's not happy. If I jump a wire from the battery direct to...

The transmission was an easy fix. In the tunerstudio software setup I had selected the wrong hardware version. The support from megasquirt was awesome. I was initially questioning their routine of email support only - no phone calls....but they are really quick to respond and know exactly what...

Project has moved along! A few leaks, blew off a turbo clamp at 30 psi (scares the Dickens out of you! Lol) and alternator plug the didnt click in which sacked the batteries twice. After 2 days of light road testing I hitched up a 5k trailer and drove 900kms. Through the mountains... not...

Its pre assembled and preloaded with software for the 4l80e. Just need to pin it and connect to trans .

Maiden drive. 12 am. No dash. Megasquirt trans controller is not working yet. Emailed their tech dept. Limp mode. 2nd and reverse. Had it in low range by accident and it seemed odd that limp mode was 1st grear. Cant get the megasquirt to be seen by the laptop. Hope to hear back shortly.

GM cam position sensor as a crank sensor. Best fit and gives proper signal for Hummer tach. And my dodge cummins one was being finicky.

This was a good moment. How to tap a straight 22mm hole for my intake heater. Using whatever is at hand....

Inside and outside of intake showing duramax intake heater (and drain plug closing second heater port until the other one arrives) position.