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Performance upgrades on 105 - 1HZ

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Performance upgrades on 105 - 1HZ

Aside from an aftermarket turbo (which mine has), and intercoolers etc, does anyone have any ideas or specifications on increasing a 1HZ's performance?
Are there any 1HZ's getting around, punching out an honest 150 or even 200 reliable kw's or more at the wheels.
Maybe different cam petunia grinds, or balancing - blue printing? Are there lighter, but stronger pistons available, is there any real effective head work that can be done? Are there people who can make custom exaust manifolds, that breath better, but still mount turbos?

Unread postby michaelevans » May 31st, 2010, 1:05 am


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I don't think the words 200kw and 1HZ and reliable go together! Having been to a dyno tune day a couple of weeks back, even the new Prados didn't make 150kw. I don't think there is much point trying to make the 1HZ something it's not- in stock form with new injectors it cruises absolutely beautifully and is proven as a long-km vehicle- anything you do to it other than extractors and exhaust is going to compromise reliability.

If you're really concerned about the lack of kw with a turboed 1HZ, it's probably time to look at upgrading the engine...
1997 HZJ80 poverty pack with 295,000km

Unread postby Amy G » May 31st, 2010, 8:38 am


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"Toyota spend millions of dollars paying engineers smarter than you to design and build car, yet you still think you know better"

I hear that comment almost weekly from my old man (He's been a Toyota Dealer for way too long)

Never mind that though, I like where your going!

In the insane quest for power I ended up with a hybrid engine thingy from both the 1HDT and 1HZ engines

From the 1HDT
Block,
big end,
rods,
cam,
and sump

From the 1HZ
1HZ Fuel pump (cost $$$ to get modified),
pistons,
larger injectors with a different spray pattern,
head (filled with heavier springs, valves, guides and it also had all the burrs etc removed and exhaust/inlet manifolds matched)

We used a Safari turbo setup which is a Garrett GT3271 turbo (twin scroll) and an A2A Front mount intercooler

At 15psi and only 480 post turbo EGT's we ended up with this at the wheels (the lower tune was a break in tune of 8psi)
Image

but it cost $$$
yet to find out about the reliability bit (only has 10,000km on the new engine)

I would reccomend to fit a 1HD FTE, intercool and chip it and forget it

all the details of my build are here
Christofurry and his HZJ105 - Will be moving to Port Macquarie - Australian 4WD Action Online Forums - the 4WD, 4x4 and offroad truck community. Get the latest tips, news, reviews, images and video clips.
and here
Performance engine Parts 1HZ - Australian 4WD Action Online Forums - the 4WD, 4x4 and offroad truck community. Get the latest tips, news, reviews, images and video clips.
Chris, now driving a 2013 Altitude

Unread postby christofurry » May 31st, 2010, 12:30 pm


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Chris, now driving a 2013 Altitude

Unread postby christofurry » May 31st, 2010, 1:46 pm


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http://www.4wdaction.com.au/forum/ showthread.php?t=74836


http://www.4wdaction.com.au/forum/ showthread.php?t=69692

Just repost those links into your browser but delete the spaces between "forum/" and "showthread...."
75 Ute, 1998, 1HZ non turbo.

Unread postby Nicko 75 » May 31st, 2010, 2:10 pm


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Oh there are a few places that can make better inlet/exhaust manifolds. Its just that they cost big $$$. I have honestly considered it though...

Things like equel length exhaust manifols and tuned length trumpets in inlet manifolds can make a pretty substancial difference on our petrol powered cousins, but Im not too sure if they would be worth the effort on our slow breathing diesels

Also Z()ltan is pulling big numbers with his 1HZ using a massive W2A intercooler and a Garrett GT2876R turbo
Chris, now driving a 2013 Altitude

Unread postby christofurry » May 31st, 2010, 3:27 pm


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Thanks Amy G, I hear what you are saying, they are what they are. And Christofurry, that is a fantastic example of a 105, I really like what have done. I read your story a week or 2 ago and couldn't believe what happened with the new engine peak reving from such an avoidable mistake. I hope it is all sorted out and going well.
I to am running a GT32 Garrett turbo and think it is well worth the money, it's a significant power increase. Reliability is a big factor, so with renowned turbo specialists doing the installation, and tuning, and regular servicing (oil change every 5000k) the only thing I really need is a Pyrometer, but I have'nt found a place that I am totally happy with mounting one.
Other engine options, a 6.5 leter chev dosen't put out much more power and torque than the turboed 1HZ, and can be a head ach with overheating. The 4.5 deisel V8 would be a great option, but sounds like a huge job in fitting it. The 4.2 factory turbo sounds like the best option.
But why do that, this car hasn't even done 70,000 k's yet. I just want a little more power so that I can run some 33" tyres on the thing and not compromise performance and economy.
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Unread postby michaelevans » May 31st, 2010, 9:07 pm


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There are lots of little things that can improve performance. Most you've mentioned. A mate of mine has a tuned length inlet on a N/A 1HZ and it flys. Another mate made an exhaust/turbo manifold for his GQ and with 15psi it flys.

However I don't think any of these things, or all of them will add up to big hp increases that you want. I think they are a great idea, as the factory and aftermarket stuff is a compromise of engineering/cost. Not to mention they are expensive.

I've found 1 small thing that can help (not big hp), the inlet piping from the snorkel to the airbox is horrid and restrictive. For about $100 you can easily up the pipes to 90mm, get rid of the factory HiClown and let the engine breathe a lot better.

You have to be an LCOOL member to check this thread, but the LCOOL forum is worth having a look at anyway. Lots of really smart people. Have a read...LCOOL.org :: Log in
[color="Plum"]BEU77Y[/color] and the [color="RoyalBlue"]BEE55T[/color] 105 series GXL Intercooled turbo diesel auto

[font="Arial Black"][color="Navy"]Don't take life too seriously.....no-one's getting out alive[/color][/font]

Unread postby BEU77Y » June 12th, 2010, 6:21 am


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Thanks BEU77Y, I recon there is a lot of gain to be made in the manifold side of things. It looks like you are running 33's on yours, did you loose much power and economy? Or anyone else who might have a 1HZ with an after market turbo fitted, do you regret going to bigger size tyres?

Unread postby michaelevans » June 14th, 2010, 9:27 pm


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You'll find most Cruiser's run around a 33" standard. It's just the width that varies. My 80 came standard with splitties (32") and the 105 GXL's come with 285's (33"x11.5").

We're running 305's which it 33"x12". Our economy is bad but I think the auto and lack of injector maint has a lot to do with that. Ooooo and the 3T of steel that it has to push.

I certainly don't regret putting the 305's on. They actually make it look standard with the 2" lift. Economy be damned..... it looks phat!
[color="Plum"]BEU77Y[/color] and the [color="RoyalBlue"]BEE55T[/color] 105 series GXL Intercooled turbo diesel auto

[font="Arial Black"][color="Navy"]Don't take life too seriously.....no-one's getting out alive[/color][/font]

Unread postby BEU77Y » June 15th, 2010, 6:22 am


 

Wow there is a million years of experience and trial and error combined on this site and am ecstatic to have found it. gentlemen i have just purchased a std 03 Landcruiser diesel wagon 100 ser.. i am looking at putting a turbo on the truck and have no idea what is the ducks guts in quality or what to avoid, i would love to hear back from those whom have been there and done that and know what is what. also does that model have chips and are they upgrade able ? and os it worth it. Thanks guys and look forward to your replies.

Unread postby ROCKETMAN73 » July 3rd, 2010, 5:05 pm


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ROCKETMAN73 wrote:Wow there is a million years of experience and trial and error combined on this site and am ecstatic to have found it. gentlemen i have just purchased a std 03 Landcruiser diesel wagon 100 ser.. i am looking at putting a turbo on the truck and have no idea what is the ducks guts in quality or what to avoid, i would love to hear back from those whom have been there and done that and know what is what. also does that model have chips and are they upgrade able ? and os it worth it. Thanks guys and look forward to your replies.


the ducks guts would be a factory turbo diesel.. the 1hdfte with upgrade chip, exhaust.

the 1hz is mechanical injection. it wont have a chip.

Unread postby popeye » July 3rd, 2010, 8:50 pm


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The factory turbo diesel 1hdfte is a great option, however with that motor came a less flexable, and less reliable vehicle with the torsion bar, independent front end. The 1HZ is an extremely reliable motor, and with a turbo fitted, feels as toey to drive as any 1hdfte manual I have driven.

Rocketman73, a Safari kit with a front mount intercooler (behind the grill) is a great way to go. You'll need to fit a 2 and a half, to 3 inch mandral bent exaust to get the full benefit.

Make sure a turbo specialist sets it up as there can be internal failures with any aftermarket turbo on any engine if mixtures and boost levels etc aren't set using a dyno.
Last edited by michaelevans on January 13th, 2011, 12:07 am, edited 1 time in total.

Unread postby michaelevans » July 4th, 2010, 12:14 am


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michaelevans wrote:The factory turbo diesel 1hdfte is the ducks guts, however with that motor came a less flexable, and less reliable vehicle with the torsion bar, independent front end. .


the motor can easily be fitted to live axle cruiser giving best of both worlds.
and from what ive seen turboed 1hz get to the level of a standard 1hdfte. chip the the 1hdfte and it leaves the 1hz behind

Unread postby popeye » July 4th, 2010, 2:47 am


 

is the safari turbo system actually made by garret ?

Unread postby ROCKETMAN73 » July 4th, 2010, 1:51 pm


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