6BT/NV4500/HF2AV Build Thread - New Adapter

[lostih]

I've been waiting for a friend to CNC my adapter plate from the file I created, but got impatient today and spent some time on the milling machine and made my adapter plate. Having this will allow me to get the tcase in and finalize exhaust routing.

 

[lostih]

Well...I didn't make it by end of June but close. Got it started yesterday. Clearly lots of wiring details, etc to work out but I hope to have it on the road after a few more days of work...not sure when those days will be though

 

[lostih]

Took the month of July to work on farm projects and let this sit. Ive been able to work on it this week though and ran it around the block tonight. No shocks so it wasn't a very spirited ride but nice to have it moving under its own power

I ended up scrapping the factory crossmember and building my own that has a tcase skid integrated. Much happier with the beef of this than my sliced up stock cross member.

I also removed the rear heater and found the perfect molded hose to go from the heater control valve to the back of the Cummins head where I installed a 5/8" 90 hose barb. This is the dayco number for it.

I wasted a bunch of time trying to figure out a serpentine belt alignment issue. Turns out the rebuilt AC compressor placed the pulley about 1.5 ribs further forward than it was supposed to. Swapped it out for a new one and now alignment is much better.

I put the interior back in tonight. I have all gauges but tach working...hope to get that and alternator wiring sorted tomorrow. Exhaust and shocks come Friday or Monday so hope to have a driver by mid next week.

Nice to have some progress!

 

[Wheelingnoob]

Great job! Just got all caught up after more than a 2 month ih8mud break.

Really like what you have done! I may hit you up for a spare output shaft some day.

Can't wait to see it on the road.

 

[lostih]

Well...she's a driver now! And I'm smiling ear to ear! I still need to tune the 6bt (not getting the boost I'd expect) but holy smokes this thing is awesome! This is how they should have been built.

I've put probably fifty miles on so far. Need to do caster correction plates this week and get AC sorted, then heading on a 500 mile road trip for the eclipse.

Nothing revolutionary to really report on final touch ups. Just having fun now!!!

 

[cody c]

congrats on your running rig, it looks great. I love the idea of a cummins swap that uses the original AWD case

 

[lostih]

congrats on your running rig, it looks great. I love the idea of a cummins swap that uses the original AWD case

It is pretty awesome! I'm really bummed so many issues swirled around duiser/jonesys/dieseladapters as this seems like a great swap to me. Super driveable and efficient.

 

[lostih]

Just filled first 3/8 of a tank. Got a corrected 19.4 mpg with spirited driving, towing a tent trailer, etc over about 200 miles. Pretty pleased with that!

Off to see the eclipse in Eastern OR!!

 

[jakerudy]

"This is how they should have been built."

I think that just about every time I drive my 6BT FJ60. It makes an awesome vehicle. Mine has an aftermarket turbo that reduces the lag of the original. If you are interested in the model let me know.

 

[GLTHFJ60]

Subscribed.

More videos!

 

[lostih]

Well I'm back from the eclipse party and Holy Smokes this thing is incredible. Lots of traffic in hilly eastern Oregon this week with lots of single lane hiway travel. So weird to feel totally comfortable pulling out and passing a bunch of slow moving vehicles on a grade, towing, loaded, and with 37's.

I finished up the AC before we left and did the washer mod to correct caster. I moved both the front and rear holes and moved the axle forward about .5". I got 5 degrees of correction. I had it check before and after...went from -2.0/-2.8 to +3.6,+2.7. Drives like stock but taller

Need to do sway bar drop and lower bumpstops. I think these wheels also need a spacer but I'm just chicken on those. Maybe I could locktite them on. My exhaust is really tight going past the tcase and contacts on hard accel and decel. I may need to take it out and do some customizing...

 

[Wheelingnoob]

Fantastic first trip! Best part is your fuel return line did not break leaving you stranded waiting on odscur Isuzu bits .

What was the MPG for the trip? How much boost are you running, stock 1st gen turbo still?

 

[lostih]

Fantastic first trip! Best part is your fuel return line did not break leaving you stranded waiting on odscur Isuzu bits .

What was the MPG for the trip? How much boost are you running, stock 1st gen turbo still?

Mpg for the trip was 18.3. Not too bad for towing and several passes to climb. Stock turbo and very laggy. I can get to 17ish psi but rarely top 10. Cruises at maybe 2-3. I'd like better spoiling to keep egts a bit lower. I can top 1200 momentarily but try to avoid it.

What engine temp are you guys running? @Mr Cimarron @Wheelingnoob @mryanangel The toyota gauge is a joke. I hooked up a secondary aftermarket one just to have an idea where I was at. My stock gauge goes to the middle by 160ish and stays there up to 235...the hottest I've had it so far. Normally I'm around 160-180, but on long climbs in traffic wit heats up pretty good. I have a weeny single core radiator in it and only an electric fan...might try again to source the dodge fan but wow are they expensive ($600 for the blades).

 

[Mr Cimarron]

I modified the stock gauge and normally I sit at lower 1/3 mark. This is with 180 degree thermostat and electric fans that kick on at 195. Most of the time my electric fans don't turn on unless I hit some traffic on hot days. I always suggest modifying the stock gauge to actually work if you aren't using a secondary gauge. It's a good way to see exactly when my thermostat opens and when the fans kick on.

 

[Mr Cimarron]

I'll try to take some photos of the gauge today on my commute. Been having to use the 80 and 40 as my DDs lately since the Ford has injector module issues. I hate electronic diesels.

 

[Mr Cimarron]

Here is my morning commute readings. The first three photos were taken within 30 seconds or so. Its like clock work how I can tell when the thermostat opens.

Thermostat about to open.

The dive of the needle after opening.

And finally stabilized. This is normal.

Cruising at 70

The last bit of my 21 mile commute is stop and go. This reading is me at work letting the turbo cool. If I would have let it sit another minute the fans would have kicked on and the temp would have dropped back to normal. This morning it was pre hurricane front coming cooler than normal so no electric fans kicking on this morning.

 

[Mr Cimarron]

This is my EGT and boost reading at 70mph on flat ground. EGT probe is on down pipe. I have read, who knows if it is true or not, that you want 1lb of boost for the amount of horse power you are using to move the vehicle.

 

[GLTHFJ60]

For those reading, the EGT probe being in the downpipe gives a much cooler reading than if it were in the exhaust manifold. That's roughly 800* EGT at the exhaust manifold.

 

[Mr Cimarron]

For those reading, the EGT probe being in the downpipe gives a much cooler reading than if it were in the exhaust manifold. That's roughly 800* EGT at the exhaust manifold.

Yup. I have the post turbo gauge that adjusts the green/yellow/red colors accordingly. I still want to move it for a proper reading but I spent a good chunk of change on the Isspro gauge and don't want to splurge for the manifold gauge version at the moment.

 

[Wheelingnoob]

I have a koso slim water temp guage in mine, a copper 3 core rad from a 93-94 FZJ80. For a fan I have a dodge mechanical off a 89-90 non intercooled Cummins. It fits perfectly in the truck and cools like you would not believe. I have yet to see coolant temps top 190f.

I have a HE351cw turbo and it boosts well, not as well as I would like but it's good.