Mythbusting the 1hz turbo , is it any good? results will surpise you - 105 series Landcruiser

Today i am back in my toyota 105 landcruiser as we continue the build and we are out on the road and cruising the highway to find out is the aftermakret 1hz turbo diesel combo any good, especially with the A442f auto transmission.
We have montitored boost, EGT and fuel consumpiton and plan to run back to back tesating after a number of mods to see how much optimisation is available and push the mighty 1HZ to its limits.
This is Episode 8 in our 105 landcruiser series and i appreciate you coming along for the ride. To keep up with our ultimate modification guide for this model make sure youre subscribed to the channel and give this video a thumbs up. Yo ucan see the full playlist fo this build here:
• 105 Landcruiser project
If you'd like to support the channel please consider making a purchase from our online store at www.onstreetgarage.com
We have a ton of mods coming up and will see you on the next one!
@onstreetgarage #landcruiser #turbodiesel #1hz #4x4
Chapters
0:00 Intro/todays goal
0:55 Turbo issues
1:27 Next episodes
2:33 Current spec/mods
3:30 Highway entry
5:30 First hill climb
9:45 use of Overdrive/lockup
11:25 What do you want to see?
13:27 Suspension mods coming up
14:05 Hill climb 2 EGT/OD
17:17 0-100 SPRINT
19:05 Hill climb 3 Maintaining 105kmh
21:55 Final hill climb LARGEST
22:46 Recap/fuel usage
23:23 Next mods ready to go!
24:40 Outro Requests

[@chrisahern21]

Awesome. Just stumbled upon your channel. Really helpful vid. I thought I had the only auto 1HZ 105 in Australia 😅. All jokes aside… I’ve been talking about putting a turbo into for years and now I’m at the point of properly looking into it over the next 18months. Keen to see more of your vids.

[@onstreetgarage]

Thanks mate, hope I can help you with your decision making! I reckon the auto 1hz is a great combo no matter what people say. I have done a few videos now on turbo selection, inter cooling and other handy mods make sure you check them out! I’m getting it tuned next so hopefully that’ll have it in the sweet spot

[@Kenlctd105]

I have a DTS turbo in my 105 3 inch exhaust it’s it’s 100% better on power and towing got it done at Berrima diesel plus they tuned it and mine is manual

[@GlenQuagmire-dj9ws]

Great vid just what I was asking for great to get some performance info on an auto 1HZ ❤

[@onstreetgarage]

Thanks mate glad you enjoyed it! There’ll be plenty more on the way

[@craigparker4108]

Mate that beast is cruising along no probs, keen to see some under body work & a paint job for sure.

[@onstreetgarage]

Thanks mate! So good to be back out in it. I would like to get out for a good trip in it before I start paint but new suspension should be mint

[@my98wagonoid]

I run this exact combo and have been trying to get sensible responses out of the internet as to what I can do to fix all its limitations without dropping 25k on an FTE. Can’t wait to see what comes next.

[@onstreetgarage]

Hopefully I can give you some honest common sense options without dropping $30k on an engine swap 😂

[@edwardphelps5129]

Great video, thanks. Keen to see performance with the new turbo, then with intercooler to see the difference that makes and what boost you go up to.

[@onstreetgarage]

Thanks mate, I’m very excited to run it back to back with each kid to see what really helps if anything 👍🏼

[@yogiaussie]

Love my 105 fz turbo.

[@onstreetgarage]

The more I see of them the more tempted I am to get in one. I had a 1FZ 80 and a 1FZ 105 and they were great cars. I can only imagine how they go with a turbo

[@user-qd1bj3qy8i]

EGTs only part of what’s going on. What about coolant temperature? That would be interesting particularly with changing viscous hub and fan. Will be keeping an eye out for the next video. Well done!

[@onstreetgarage]

Thanks mate, I actually have a sensor for the gauge for water temps just haven’t decided how I’m going to hook it up yet. Might have a look how simple it is and get it in sooner rather than later.

[@Shaanjc96]

Keen to see the outcome of this and what changes. Mine is front mount intercooled and EGT’s vary from 280-410° when on the highway but can go to 500° when going up a big hill, sometimes feels like it dies off up the top

[@onstreetgarage]

That’s the sort of numbers I’d like to see. I think it’s be a punish towing atm

[@Shaanjc96]

@@onstreetgarage they are good numbers however I don’t feel like there’s enough power, most likely due to the turbo. I’ve never towed with mine but interested to see how it would do

[@onstreetgarage]

@@Shaanjc96 do you know what turbo you have?

[@dhc4ever]

I would say its badly in need of a good tune, valve clearance, new injectors and decent dyno tune would get thqt thing going as it should. My na 80 went from.120 to 80 on your last hill on its final trip before getting a turbo so i thought your effort was pretty respectable. Over heating in the 1hz, first thing to check and also the cheapest is the thermostat. Then the viscous fan then the radiator if its old or corroded. Also if everything che ks out and it still does it check injectors and fueling. Will be interesting to see your results. Cheers

[@onstreetgarage]

These are all great tips thanks mate! I have done the following since this video: Valve clearances New injectors New viscous fan New thermostat Front mount intercooler It’s running 100x better, I’ve got a couple of videos since this one showing improvements and will have results of the front mount this Thursday. It’s just in the queue now for a tune to hopefully bring it all together. There’s also a potential opportunity come up to get an FTE for a great price so just weighing everything up

[@barryprosser162]

Identical setup to mine. Auto 1hz dts turbo since new. So keen to follow the upgrades! I assume you’ll have to make some decisions around the trans cooler when you do the front mount? Mine has a cooler already, from factory i thought? Is that the max psi you can get out of your dts? Has your top mount got a fan? Is the bonnet sealed to the intercooler?

[@onstreetgarage]

Hey mate glad I can help with potential decisions for you. I’ve bought an inter cooler that takes into account the factory trans cooler. When the time comes I’ll consider whether I go to a bigger core intercooler and relocate an aftermarket trans cooler. Im not sure how far you can push the dts unit in terms of boost however no matter how high I push it I don’t think it will address the slow spool up. Top mount is sealed to the bonnet but does not have a fan

[@SuperSimmo88]

The A442F will lock up in 3rd (overdrive off), provided you are not full throttle. I find using the switch to force it out of overdrive, vs. just putting your foot down almost always results in it locking up straight away.

[@onstreetgarage]

That’s interesting I wasn’t aware it would do that in 3rd also. So do you reckon adding throttle is better than pushing OD?

[@SuperSimmo88]

@onstreetgarage no, I think doing what your doing is right. It probably comes down to what feels right, and using the gauges to confirm that the engine isn't working as hard. And yes, if you put your foot down enough for it to unlock the torque converter (not a bad thing at all), then it will start to generate heat in the transmission as you say. Perfectly normal, but of course it's dumping that heat into the cooling system, which can put a bit more stress on it if it's not up to the task, but it sounds like you are on to it already.

[@livingstonekot757]

Would installing an intercooler, upgrading the engine cooling system including upgrading the oil cooler help reduce the problems associated with turboing the 1hz..??

[@onstreetgarage]

Intercoolers definitely help. I changed the viscous fan too which also helped water temps a decent amount. I haven’t tried an oil cooler but I reckon that’d be even better again

[@petermenzel5943]

The egts are increasing when you put it in overdrive because the revs are lower and gives the fuel more time to burn in the cylinder whilst also loading the engine up, not because of low boost. the more boost you feed it, the more your egts will increase, same goes for increasing the fuel delivery.

[@onstreetgarage]

That mostly makes sense to me mate, appreciate that. Only thing I thought was that adding more boost would decrease egt (within reason)

[@petermenzel5943]

@@onstreetgarage from factory even by adding boost to an na engine will increase egts because you are getting a more complete burn. only time you will get lower egts from adding is boost is by adding an intercooler because you are feeding it cooler/denser air.

[@gc4x4]

Hey mate, great video. What gauge screen is that?

[@onstreetgarage]

Thanks mate. It’s a JRP multi gauge. Excellent bit of kit and you can change the display to suit what you want.

[@tacoooooo11111]

is it worthwhile installing a egt guage for a non-turbo 1hz to monitor temps? If so where would you put it?

[@onstreetgarage]

I do t think there’s much point. I’m not an expert but the idea of monitoring egts with a turbo as the turbo can push temps high enough to damage pistons. I don’t think an N/A can generate enough heat to do that sort of damage.

[@ericjohnson6802]

Fuel use is up there, much worse than our 250kw all the fruit SC Disco, but better than daughters GU 4.8 which is absolutely terrible. Our GQ shorty and son's all the fruit GU turbo 4.2 EGTs rise rapidly up hills too, despite all the additional cooling fitted and he simply can't tow with it! It'll be interesting to see you're future figures but I expect you'll be seeing similar rapid EGT rises as the power and weight goes up.

[@onstreetgarage]

Yes I think the consumption is due to the injectors being well overdue for a rebuild as I had a 1hz years ago with a similar setup that was closer to 11-12l/100. In terms of egts I know the 1hz is limited by the flow of the head, I had a 1hdt which never got hot and was much better. You may be right and I see a lot of talk on the internet about what these future mods will or won’t do so I’m just excited to be able to do some real life testing 👍🏼.

[@user-lb7xn3do2g]

I think one of your main problems might be its not tuned right, these kits are designed to run about 11-12psi I beleive and even during the 0-100 sprint you didnt crack 10psi its probably running quite rich

[@onstreetgarage]

Yes I agree, tune was meant to happen before Christmas but tuner had a backlog of cars they couldn’t get through on time. As it is I’m very happy with it now with the new turbo so I’m excited it should only get better again with the tune 👍🏼

[@muscat0]

What turbo upgrade do you have your eyes on?

[@onstreetgarage]

Looking at the kinugawa 18g. Seem to have great feedback and not too crazy $$

[@ash300186]

On the straight and level, a na 1hz will blow straight past 110kph no worries. 10psi at maximum load up those hills is asking for a failure though.

[@onstreetgarage]

I would say the egt is more of a concern than the boost. And yep a 1hz na is sweet on the flat all day but see ya later in the hills

[@ash300186]

@@onstreetgarage to be clear, 10psi isn't enough. Trying to improve power using only 10psi will create poor afr and a failure. Especially using such a lazy turbo.

[@onstreetgarage]

Yep I get you! Next turbo has wastegate set at 14psi and smaller rear housing so should see a massive difference 🤞

[@ashleypost3501]

How far from the turbo roughly is the egt?

[@onstreetgarage]

Right up the front of the dump pipe. I’ll get some pics when I do the turbo

[@ashleypost3501]

@onstreetgarage yeah nice figured as much, mine is about 150mm down, would love to move it up just for peice of mind haha

[@zactrimble4343]

TUNE IT UP TO 12PSI AND IT WILL DROP YOUR EGTS BY 150DEG

[@onstreetgarage]

If you suss out my later videos we ended up around 14psi after the tune and it completely transformed it!

[@davidrose2382]

O to 100 mate wtf wtf😅

[@onstreetgarage]

Haha you gotta have a laugh with these things sometimes mate! Also a good way to compare mods whether they make a difference