Saving the silver 70...

[MrMoMo]

Ummmmmmmm....


So I went for a quick jaunt tonight after hooking power to the boost and pyro, to see where things are. Didn't push it at all as I was barely getting up to temp, and you know, it's a pretty fresh install so I'd rather not go catastrophic on the first run.

The good news, the boost gauge works, and the Pyro works.

However, I think I need to delete the rear heater (no loss at all, never use it) as the coolant lines are very close to the turbo outlet and I'm pretty sure I could smell them getting hot. Highest I got the pyro to read was only 300C, and not for long - so I know they will see more heat.

Question #1 - can I just remove the T fitting where the rear heater comes off the supply to the front heater, and cap the rear heater return at the front of the block?

Question #1.5 - anyone know a good method of making home made heat shields (to protect the remaining heater lines? I have some thin aluminum but it would seem to need more than that.

Question #2 - ummmmm. This looks nothing like the fuel adjustment screw on the 3B in my 60...

How do I adjust this, and why does it appear to have a vacuum line going to it and look like it adjusts with vacuum? Have I lost my mind and am in the wrong spot?

 

[tmarx]

Try this thread

Where's the fuel screw in this photo

 

[MrMoMo]

Try this thread

Where's the fuel screw in this photo

Cool, actually linked in that thread but it did get me there - thanks. I also posted on the TLCA Facebook group and eventually got the "High altitude compensator" answer as well.

Good to know - this truck came from out west so makes sense in the mountains.

Currently fighting coolant hoses, and shortly with fabbing some heat shields.

Spun up the old Southbend and made this crude plug for the "odd" line. Going to loop the heater to itself, remove the T fitting and plug the one from the front of the head.

 

[MrMoMo]

Ok, so...

Temporary plug in the line:

Looped the line on the firewall:

Installed a new main line with no T fitting in it, way better clearance with this one:

Made a few more heat shields with some thin aluminum scrap (to help reduce the heat getting to the fuel lines)

Then fought the "altitude compensator" for one turn out on the fuel to see if that improves the power a little...

 

[MrMoMo]

Oh, and for those wanting to compare te 3B with no altitude compensator.... Here is my other engine...

 

[MrMoMo]

Ok, went for another spin with the "revised" hoses and 1 turn out on the fuel and things seemed a little better but hoses still get "smelly hot" so I decided to add another heat shield...

Made this one from some fresh aluminum!

2 bolts go through the heat shield into the intercooler mount, rubber hose acts as a spacer. Made a big difference, but still gets smelly on long hills.

Unfortunately on my second run my el cheapo pyro appears to have packed it in, so I don't know what "smelly hot is" might add a second spaced out layer of heat shield on top of this one for some air gappage...

 

[MrMoMo]

Well, we made it out camping and back with no drama! (But I do think it's time to change the thermostat, had a few scary "temp gauge you'd better stop climbing" moments!)

So, now the funny story. Being that this was the first lengthy drive after the install, I was a bit paranoid. While rounding one corner after a stop sign, I noticed a "dribble line" on the road in my mirror, even though there were no signs of an issue, I pulled over to take a quick glance under the truck. Nothing of course. Got back in and drove the next hour or so to our destination. Hung out for the day, set up camp, ate dinner, you know, the standard stuff... About 8:30 is starts getting dark, and I go looking for my... Crap, where are my glasses? Searched everywhere for them and can't find them. Running back through my head, I can't remember placing them anywhere, or leaving them at home when I put my sunglasses on.... Then, while off on a short walk it clicks.... I had them clipped in the neck of my shirt, and I bent over when I looked under the truck - I bet they fell out there. Well, needless to say on the way home, we pulled over in the same spot (but opposite side) - and could see them sitting on the shoulder. Not a scratch on them, sat there all on their own for 30 hours or so!

Right then, back the the fiddly bits on the truck next!!!

 

[MrMoMo]

Well didn't get much done yesterday (Canada day) as I was busy spraying kids with a fire hose on a Canada day plastic sheet water slide at the park, but did manage to sneak a bit in on Friday.

Got the thermostat changed, topped up the coolant to start. Man these thermostats must be made of platinum and gold they are expensive! Also removed the hard pipe to the rear heater and re-located my block off plug to right by the block.

And I believe I am slowly perfecting the art of hand making heat shields. Check this puppy out.

Also made a treadplate block off plate for the "blow off" valve - because you know - everything needs some aluminum diamond plate...

Heat shield on:

Got the glow plug relay moved and the second battery put in the front as well (and wired). Have a pair of 4ga wires about 75% run to the battery in the back. 80A fuse at each end, and a "surplus" powergate isolator to prevent discharging the starting batteries.

Oh, and I replaced the pyro gauge with a digital one from EBay, looks like the thermocouple was OK, it was just the old gauge that was shot - which is good because the new thermocouple is not the same thread as the one I installed. (Both are K type)

More work on the truck today, then off camping at the cottage for the night (holiday tomorrow).

 

[MrMoMo]

Well that was fun... New pyro seems to be working - average running through up/down hills was 350-400C (660-750F) - with a few of the longer hills seeing 450 - 475 (840-890F)... I don't think I'm going to mess with the fuel any more at this point until I've seen some longer hills.... Any thoughts on the numbers above? Best thing about this Pyro is that it's digital - and doesn't bottom out - so when I get in the truck and it says it's 22C I know the ambient temp!

Made the treck through the last little bit of bush to the "spot"

Had to replace last years photo from the same spot, but now with hole free fenders and hood!

And a wide shot just for fun...

Wicked downpour and lightning right as we climbed into the tent, stayed dry as a bone.

Spot the cruiser?

 

[MrMoMo]

Back to some saving!

Last year I replaced the forward cross tube above the rear axle that holds the passenger side rear shock. Today I decided it was time to change the rear cross tube, BEFORE it breaks... I'm sure I could have lasted the summer, but now I don't have to think about it.

Tonight I spent some time prepping for the replacement.

Here is the failure point, or future failure point!

I cut the tube off with my sawzall just inside the flange.

Next I went to town with my air chisel on the inside of the remaining tube section that stays in the frame

And then pushed through with my 44 (1-3/4") just to clean up any remaining snags.

I believe I cut the pipe at 43-1/2" and it slides right through.

Cut the shock mount out of the tube and ground down the remainder.

Tomorrow night I'll put the hole in the tube where the shock mount goes, give the tube and frame a quick grind to clean it up, then slide the tube in place, weld the shock mount in, spray some paint around the pipe (before welding so I can get the top!) and weld it back in.. One more thing will be off the list!

 

[MrMoMo]

Drilled, slid, painted, welded, bolted... Done.

I like how the outer welds came out on this...

Started some preliminary work on a simple swing out "bumper". More on that later!

 

[MrMoMo]

Well, I guess it's later now! Just got home from a 4116km trip. Shook a lot of things loose (including turbo bolts, hood bolts and wheel nuts!) truck was great, added a great awning, found some cool trails, drove on a beach, and got tons of pics and video. Will be making a trip video at some point, but here are a few pics for now!

FYI, I'm underwhelmed with the turbo - I'm sure there is a version of this one out there but I'm just not gettin the boost out of this that I want. Conveniently I accidentally won a CT26 on eBay and it arrived while we were away... So, there will be a new box tube manifold and CT-26 install coming! (Box tube manifold worked like a charm!)

 

[Burbot]

My son has an 86 bj70, he wants a turbo like crazy. The box manifold I can get also the intercooler I'm wondering about turbo size. How many ft. lbs. are you running most often and at max boost?

 

[MrMoMo]

My son has an 86 bj70, he wants a turbo like crazy. The box manifold I can get also the intercooler I'm wondering about turbo size. How many ft. lbs. are you running most often and at max boost?

On this turbo, not enough. With my CT26 in my BJ60, I was happy with the performance at about 8-10lbs max, and 5-8 lbs on the highway at 100kph

 

[DenDen]

Strange, I was able to push that Volvo turbo to 13 PSI. 7-8 PSI cruising 100 kph. However I did not have an intercooler.

 

[MrMoMo]

Strange, I was able to push that Volvo turbo to 13 PSI. 7-8 PSI cruising 100 kph. However I did not have an intercooler.

I can see the intercooler knocking a few lb's out for sure. It's possible that I have different internals in this turbo - different inducer/exducer trims but same housing, what did yours come off?