1hz..TURBO? (1 Viewer)

[SimonInAustralia]

And you also have to be careful, when EGT are mentioned, as it could be pre-turbo or post-turbo where the EGT is measured, where the probe is positioned, which gives different readings.

And some will talk temps in Celcius, some in Fahrenheit.

 

[lshobie]

Right - good point, mine is pre turbo.

 

[nikland]

@Louis, can you send me a photo of the point in which you have put the sensor for the EGT? on the minifold?

 

[ForealBoreal]

Hey Louis what were you getting for fuel economy before your turbo install?
What about after now running at 15psi?

 

[lshobie]

Fuel economy seems about the same, my foot is heavier though. If I pull a loaded trailer the mileage gets alot worse.

I have 4:30 gearing and run 285/75/16s, if I keep it at 100kms/hr the mileage is great - anything over that and it startes going down - just revving too high.

I do love these engines. I have another one that I will be tweaking a little and swapping, rebuilt trannytransfer and a wicked clutch from australia. right now with the 36's front and rear locked and pulling a 4 runner through the mud I will slip the clutch in 2nd low (factory clutch), so it just isn't good enough.

 

[crushers]

maybe a bit less throttle...
with the right tires you don't need HP to pull a truck through the mud.

just saying ....

 

[lshobie]

maybe a bit less throttle...
with the right tires you don't need HP to pull a truck through the mud.

just saying ....

Every circumstance is different - you weren't there - a little more throttle would have been nice. Or, the clutch not slipping would have been better. Ideally just hooking up 400 metres of winch cable would have not needed any HP or tires - but there is no fun in that either.

Right tires? What tires did I need for that pull Wayne?

Just asking...

 

[crushers]

you said mud so i will make the recommendation based on that...
when i am wheeling in mud i run these:
IH8MUD.com - View Single Post - early spring run
i idle most of the time, when i need to tug i have plenty of traction and with the lockers and the PZ NA torque i can get anyone free ... oh, and the biggest asset i have is that rope i keep telling you about. it is AMAZING for extraction purposes, 150' long. the most gentle tug you will ever recieve even if i gtab third by the end.

just saying...
how old is the clutch?
how many times did it get 'burnt' previously?
how do you release it?

i have yet to see a factory clutch be the issue, driver error is the biggest killer of clutches...

and, nope i wasn't there but i base my recommendations off the terrain i have experienced over the decades and variety of Land Crisers i have wheeled...

 

[SimonInAustralia]

When my turbo was put on, the mechanic suggested that the clutch might not cope, but to see how it goes.

I have heard the same recommendation elsewhere as well.

Possibly due to poor driving habits, or maybe the standard clutch is right on the edge of it's limits when a turbo is put on?

 

[lshobie]

Mud - muddy, hard based soil with coat of mud, deep tire trenches and solid high ground. The only way your tires or any other would have worked better is if they are taller than mine. I was dragging my diffs on hard ground and pulling the other truck with 29 inch tires that weren;t touching the ground the whole way. But, when I had traction is was fine and that was when the clutch was spinning - so in that case I had plenty of traction - the more power the better to get me over the next high ground spot to where I could get traction again.

I was pulling with 3 long straps about 100 feet in total - plenty of stretch, but I know how well those straps work.

Your ag tires are good more of a dedicated tire, I drive my truck to and from spots with my big tires - and they are better on rocks. Ag tires around here would be pretty useless for where we go.

Clutch was new when I got it in the truck - must be my girl like clutch shifting eh. Do a search in Oz, they spin OEM clutches when running lots of traction and power, you probably wouldnt have that problem because I suspect you are running less power than me, maybe your turbo isn't up to snuff?

Oh, and based on what you have seen and where you have been usually doesn't mean a whole lot, a wise old man said to me once "if you don't learn something new every day then you are a dead". Every situation is different - you don't know everything.

Now - I have to go work on my shifting/clutching.

you said mud so i will make the recommendation based on that...
when i am wheeling in mud i run these:
IH8MUD.com - View Single Post - early spring run
i idle most of the time, when i need to tug i have plenty of traction and with the lockers and the PZ NA torque i can get anyone free ... oh, and the biggest asset i have is that rope i keep telling you about. it is AMAZING for extraction purposes, 150' long. the most gentle tug you will ever recieve even if i gtab third by the end.

just saying...
how old is the clutch?
how many times did it get 'burnt' previously?
how do you release it?

i have yet to see a factory clutch be the issue, driver error is the biggest killer of clutches...

and, nope i wasn't there but i base my recommendations off the terrain i have experienced over the decades and variety of Land Crisers i have wheeled...

 

[lshobie]

When my turbo was put on, the mechanic suggested that the clutch might not cope, but to see how it goes.

I have heard the same recommendation elsewhere as well.

Possibly due to poor driving habits, or maybe the standard clutch is right on the edge of it's limits when a turbo is put on?

Yes, depending on how you drive will determine how your clutch will last, if it is a comp truck or you drive hard it won't last, if you run low boost and moderate driving it will probably last the same as non turbo. Talk to most who put out 15psi plus boost while locked and they will recommend a better clutch.

There is a reason the 1HDT has a bigger clutch.

Regards,

Louis

 

[crushers]

well, it sounds like a challenge is being issued...you might need to learn something new, like driver skill.

come on up and i will accept your challenge, loser buys supper and drinks.

you bring your turbo'd, intercooled, high horsepower, big tired locked monster and i will run non-turbo'd, stock fuel setting, little red. we run the same TRAIL (not mud pit) start to trail end. you go first and i will limp along behind. total number of tugs needed, as well as breakage, will determine the winner.

talk is cheap till the s*** hits the fan.

if you are as good as you say you are (i KNOW how good i am) then you won't have a problem.
(bring lots of cash, i get pretty hungry and thirsty after a good day wheeling)
((oh, bring a winch wench with you, just in case))
(((and maybe a tow vehicle, just in case. that is a long drive home should something happen)))

 

[lshobie]

lol, getting stuck is half the fun, the other half is not getting stuck.

So this is one of those "look here sonny, i'll whip your ass with just this here thumb"? What happened to the worlds best PZ landcruiser with propane, tractor tires, hillbilly hood scoop, millenium falcon winch and fully mapped nuclear fusion reactor turbo specially designed for you? Ah, with your skill you could probably beat me with a skoda eh.

At no time did I say I was good, you in fact are the braggard, every interweb board has one.

No tow vehicle needed, never have needed one, hopefully never will - never broke anything that needed major repairs on the trail - have you? I'm always up to learn something new, are you? Or do you really think you know it all?

Dang - shouldnt have said that as I am going out on sunday, will probably eat crow. Specially going out with a bagged transmission.

well, it sounds like a challenge is being issued...you might need to learn something new, like driver skill.

come on up and i will accept your challenge, loser buys supper and drinks.

you bring your turbo'd, intercooled, high horsepower, big tired locked monster and i will run non-turbo'd, stock fuel setting, little red. we run the same TRAIL (not mud pit) start to trail end. you go first and i will limp along behind. total number of tugs needed, as well as breakage, will determine the winner.

talk is cheap till the s*** hits the fan.

if you are as good as you say you are (i KNOW how good i am) then you won't have a problem.
(bring lots of cash, i get pretty hungry and thirsty after a good day wheeling)
((oh, bring a winch wench with you, just in case))
(((and maybe a tow vehicle, just in case. that is a long drive home should something happen)))

 

[crushers]

yah, i got bored so the horny winch got moved over to little red as did the tires, the rest is factory stock.
the turbo, intercooled, Propane injected, R141 got moved over to the wife's DD/wheeling rig...

thumb? i ain't that good.

a locked and tricked vehicle makes a poor driver look good.
a good driver makes a stock vehicle look tricked.
a good driver in a tricked vehicle ... gets bored.

 

[crushers]

BTW, a braggard is someone that can't walk the walk...
(i can)

 

[ForealBoreal]

Thanks Louis for your input. Your truck is a jem. I would love a pickup.
Heck I would love a 70 series in general.

 

[CanuckMariner]

While we are on the topic of turbos and EGTs, I have a '91 PZJ-T77 (manual trani) that Wayne set up. Running with everything the same as when he set it up other than loaded for expedition, so it is near 6000lbs GVW. I have leaned off the air/fuel mix as per Wayne's instruction on my 73 so that I no longer have any black smoke. Boost tops out at 8-10 PSI.

I get great mileage at less than 10L/100kms (Wayne can attest to my driving style) on flat highway speeds of about 80-90 km/hr and at slightly less than 2000 RPM. However, my EGTs climb quickly (conversely they drop pretty fast as well) and get near 1000 F (and more if I continue) on any slight grade, so I slow down or gear down to keep them under the 1000. A member of RMLCA told me to increase fuel and it will run cooler. Is that correct? but then I am spewing black smoke again, a sign of unused fuel, I think?

What are your comments, suggestion, solutions?

 

[lshobie]

While we are on the topic of turbos and EGTs, I have a '91 PZJ-T77 (manual trani) that Wayne set up. Running with everything the same as when he set it up other than loaded for expedition, so it is near 6000lbs GVW. I have leaned off the air/fuel mix as per Wayne's instruction on my 73 so that I no longer have any black smoke. Boost tops out at 8-10 PSI.

I get great mileage at less than 10L/100kms (Wayne can attest to my driving style) on flat highway speeds of about 80-90 km/hr and at slightly less than 2000 RPM. However, my EGTs climb quickly (conversely they drop pretty fast as well) and get near 1000 F (and more if I continue) on any slight grade, so I slow down or gear down to keep them under the 1000. A member of RMLCA told me to increase fuel and it will run cooler. Is that correct? but then I am spewing black smoke again, a sign of unused fuel, I think?

What are your comments, suggestion, solutions?

When you backed it off how much did you back it off? I'd try turning it up a bit and experiment = you can always turn it back.

One thing I will say is that when adding a turbo to a 1hz (the pz is pretty much the same) the egt's do climb quickly under load, fixes are a boost compensator or/and intercooler. Does the turbo boost off idle or kick in at 1600 or more rpm? If it kicks in later then a smaller turbine housing will lower egt's. There are other fixes, you could ceramic coat the manifold and turbo housing to help it run a bit cooler.

I'm surprised you went from a smaller more powerful truck (didn't you have a turbo on the hzj73) to a bigger less powerful truck.

But what do I know, I can barely drive a standard.

Regards,

 

[CanuckMariner]

Thanks Louis, great to hear from you and so quick.

I only turned the adjustment a bit (~1/8 turn or less), just enough to clear the black smoke.

Turbo starts up at about 1300+ RPMs.

Yes, I still have the 73 and getting her ready for sale this summer. Basically took her apart (interior) and cleaned 3-4 years of dust and dirt out of her. Now putting her back together and almost done but seems I did something and now the 4 way hazard lights and main headlights don't come on. All fuses/relays are fine. Must have a loosened a connection somewhere. Also, gotta find what is causing the battery gauge to come on and off intermittently.

I got the PZJ cause it has four doors (vs 2 on 73), longer (~15" - more room for sleeping in it), standard (vs HD auto), a year newer, less mileage (>100K), better fuel economy (>10L/00km) and a whopping super price. With the 5 cyl instead of 6 (1HZJ) and manual vs HD auto trani, I figure it was pretty much a wash on power.

Will try the fuel mix a bit (thxs) while I travel on a 6 week UT/AZ/NV/OR trip starting tomorrow. Would love a turbo cooler but where to put it?

I am thinking the weight and going up hill causes the turbo to climb up to 1000 faster than before. I added a custom rear bumper (dual swing - tire/dual cans) and the Grp 31 blue tops (for extra power starting in winters) and most of my interior gear from the 73 (AO drawers, fridge, personal gear, cooking stuff, etc.)

Cheers, (I know you know a lot more than I do!)

 

[lshobie]

No prob, if that were my truck the next mod I would make (from the type of trekking you do) would be a water/air intercooler, scrap any ideas of air/air if you have them. You could set the small rad in front of the radiator, they do it successfully in oz. It makes a dramatic difference and is much better than air/air in my opinion - having tried both in my truck.