Builds Harumi the Rusty Rescue JDM HJ60 - Build Thread

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I hit 275,000 km sometime in the last two weeks, and got my extra valve cover back from the polisher this past Wednesday. So shiny!

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Very sweet indeed... dont forget to reroute that crankcase breather hose if you're not already planning to!
 
Fabbed up the down pipe and plumbed everything today. Lots of little things, all of which are important!

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Fired right up! (after priming the turbo with oil). It's surprising how much quieter the exhaust is now!
It's a definite improvement in power and maintaining cruising, but there is more power in there just waiting! With the .5 bar wastegate spring and not adjusting the fuel, I could get boost up to about 4-5 psi. My target boost is about 7-8 psi. Booooooooooooooooooooooooooooooooooooooooooost!

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Short term things to do:
-Adjust Fuel Screw
-Tune Waste Gate by swapping out the spring

Long term things to do:
-Top mounted Intercooler
-Injection Pump boost compensator
-Braided steel coolant lines
-Single piece welded induction tube?
-Heat Shields
 
1/4 turn up of the fuel screw and swapping the wastegate spring from .5 bar to .8 bar and we are in business! It scoots and boosts up to but not exceeding ~.5 bar (~7 to 8 psi). Just a little puff of smoke stomping on it. It feels like a totally different truck!

I think a previous owner had already turned up the fuel at some point since I didn't have to add much. None of the pictures of 2H fuel screws I have seen look like this one either. Aftermarket @duncanrm ?

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Drove it up the hill last Sunday, and then to work during the week. The intercooler kept it nice and cool up the hill and on the highway. There were a number of one way lights due to the construction. It does heat soak if sitting at a light for more than a few minutes. This caused it to smoke when I started rolling again, but it quickly cleared up. Fuel efficiency seems to be up, but I don't have a number yet since I haven't had to fill up yet!

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Today I added some heat shielding between the intercooler and turbo, bracing from the block to turbo, and a filler plate for the hood. This should keep it even cooler and help reduce the heat soak since it can no longer recirculate hot air through the intercooler.


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Fuel efficiency seems to be up, but I don't have a number yet since I haven't had to fill up yet!
Oooookay... that was definitely placebo effect on the fuel gauge.

16 mpg (corrected for tire size). Previous best was 20 mpg, with an average of 17 mpg. Admittedly I was cruising at 70 mph this past week (because now I can!), whereas before I was only able to do 55 mph (with happy EGT's anyway)...
 
Needs a Subaru hood scoop for that TMIC lol.
What a cool rig! I'd love to compare the power in this thing with my noisy and slow 4 cylinder Cummins
 
Needs a Subaru hood scoop for that TMIC lol.
What a cool rig! I'd love to compare the power in this thing with my noisy and slow 4 cylinder Cummins
I just need to design and build a boost compensator for the injection pump, then its off to the dyno again! I'm hoping to get about 90 hp to the wheels.
I think your 4bt would smoke my 2h-t (one way or another!).
 
I was still getting a whiff of diesel stink in the cab under various circumstances. Sure enough, soot could be found at the clamp connections, so exhaust was indeed escaping before the end of the pipe. Even the V-band clamps appeared to leak a tiny amount. I replaced the sleeve clamps with V-band clamps and sealed them all with copper RTV.

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Adventure time!

This past week I drove up to Owen's River to camp with some friends for a few days.
Wednesday was the drive up.
Going up CA-14 was no problem now with the turbo!

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We stopped in Bishop to refuel and pick up some goodies at Schat's...
Against all odds I managed to stick to the plan and only buy gifts for my mom and my girlfriend.
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Next came the grueling grade up to Sherwin Summit. This was the real test. It's about 8 miles up from 4150 ft to 7000 ft. The cruiser made it up in 3rd gear going about 35 mph. The temperature gauge crept up to a little bit past the middle mark and I was able to keep it from going any higher. The coolant expansion tank overfilled but it didn't overheat so I might look into a larger one. It was slow going, but we made it!

After the grade, the rest of the drive was a nice relaxing cruise into Brown's Owens River Campground.
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On Friday, we headed into the hills to the west of camp. We found an old quarry (and I left my camera in the cruiser, doh!). I'm not sure what they were mining at the quarry, but it might have been where the orinial Star Trek rocks came from they were so light.
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Later, we found a peak covered in obsidian in the form of small rocks and gravel.

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