HZJ105 Aftermarket Turbo - Pls help

[malinda_um]

I'm looking to purchase a turbo / intercooler turbo kit for my 99 HZJ105 auto. Its has done 110,000 Km to date. I contacted several companies (APS, ATX & Turboglide).

Most recommend just the basic kit (without an intercooler).

After reading some of the posts on this forum, i'm reluctant to turbo my motor. I'm not looking for big performance gains. Engine reliability is the most important thing.

Should I turbo my engine? intercooler?
Which kit would you recommend? (APS, ATX or Turboglide) ???

Any comments would be much appreciated

Thanks in advance.
M

[simkell]

yes, why not.

i would go the denco system, it seems the goods with a good warranty.

[hdj105]

If engine reliability and longevity is foremost, ensure you use an intercooled kit and keep the tune conservative.

[me3@neuralfibre.com]

I've got the AXT kit and it's fine. I'm adding an intercooler because I can, but they don't really need it.

Turbo at 9PSI is very unlikely to effect longevity. On one of the posts is a link to Corky Bell - Maximum Boost.
Although it doesn't cover diesel's, it shows some interesting details on why turbo's don't affect a motor as much as you would think. Peak combustion pressures are not effected much, the change is mostly mid stroke. Under compression the rod is still under tension from the weight of the piston, so the turbo actually reduces fatigue in the rod. Suprised me, but his numbers add up.

1HZ has a reputation for not coping if pushed too far. Some ppl here can attest to that. But they can also attest to blowing up every motor ever made, along with gearboxes, axles, diffs etc etc.

Keep it safe, add an intercooler if you can afford it. Enjoy it.

Mine has 230,000 km and the original owner installed the turbo at 40,000km. Looks like he did a lot of towing with it.

Paul

[malinda_um]

Thank you for your feedback.

What kit would you recommend?

[spazbot]

ive just a put a denco kit on my 2001 105 series cruiser just the stock denco kit with the 2.5" pipes and fuck me does it haul some ass now, well worth the money to do

[chunks]

Go a Denco kit mate you won't look back. A mate's 1HZ turbo did 450 k before he blew it up and he gave it a hard time, towing a big trailer etc.

[me3@neuralfibre.com]

AXT is cheap and nothing wrong with mine. Turbo is a "touch" large, but driveability is great.

www.4wdsystems.com.au is another.

Paul

[spazbot]

4wdsystems sell the denco kit

[malinda_um]

Thanks guys for all the help and advice.

I've decided (after much thought) to go for the 4wdsystems denco kit. Does anyone know if this kit comes with an exhaust manifold? All the other kits seem to. Is there any difference in using the stock manifold?

Also Does anyone know why the APS(Safari) kit is so expensive compared to others?

Again thank everyone. Help was invaluable!

[me3@neuralfibre.com]

I *belive* the safari kit is probably the best matched and quality kit out there, but others may say otherwise. The AXT kit seems to be the budget model, although the lines etc are top notch, and mine works fine. The compressor on mine could do with a smaller A/R, but that's me being picky, nothing more.
My inlet temps seem to get to 120C overtaking and peak at 140C under sustained load. Generally they don't go over 100C. 9.5PSI to redline. Full 9PSI at 2200RPM, which due to the auto is fine. I would like to see full boost at 1800RPM and less up top, that would suit the engine behaviour better in my opinion.

Paul

[dow50r]

Safari is like the lambo of turbos.....they make a great system. The other major brands are also excellent, even better value...the bottom line is if you want petrol power, buy one, dont try to get petrol power from the 1hz or it will die prematurely, a concervitive turbo alone will work wonders, but if you put ani intercooler on, it would allow the motor to do it easier and cooler, so more reliably
Andrew

[malinda_um]

ATX is the budget model??? The following are the quotes I got

ATX:
Turbo Kit AUD 2990.00
Intercooler Kit AUD 1750.00
Total AUD 4,740.00


4wdsystems
Turbo Kit AUD 2,250.00
Intercooler AUD 1,494
Exhause AUD 430.00
Total AUD 4,174.00

Turbo Glide
Turbo AUD 2650.00

APS
Intercooled Turbo Kit AUD 4,900

So based on this I decided on 4wdsystems because of the price. Also they were very helpful.

What do you guys think?

[me3@neuralfibre.com]

I like the stuff in general from 4wd systems, but it is a bit industrial (rough). Works ok though. Haven't seen their turbo kits.

Paul

[hdj105]

So based on this I decided on 4wdsystems because of the price. Also they were very helpful.

What do you guys think?

What sort of intercooler are AXT and 4WD systems all supplying? Top mount (do you need a scoop and bonnet mods?), water / air (ongoing maintenance of fan / pump / coolant?).

The APS front mount bar and plate core is probably the most expensive to make, maintenance free and arguably more efficient...?

[Toy80Diesel]

To Malinda_um, why are you mentioning ATX when I believe you mean AXT?

I have the AXT on my 80 and I'm very happy with it. I found them very helpful and the system produced what was promised. I haven't fitted an intercooler, but when I was there I looked at the two models they had. One was a top mount with a fan and the other was the water to air barrel cooler.
I wasn't convinced on the top mount, but it has a fan and is meant to push the air down and under the car, just as the airflow under the bonnet works as standard. Can't remember the exact price but it was just over 1k.

I have since fitted an oil catch can. It has only trapped a little bit of oil, and this usually occurs just after an oil change, and only when my mechanic is a little over generous with the oil.

[4runner2.8]

another thing to look at is the turbo used, 4wd systems which is a denco set up has a non watercooled turbo, they work just as well, but you really should have a turbo timer fitted as hot shut down damages is more likly to happen then if it was water cooled. also long term i dont see them lasting as long.

[hzj75]

doesnt matter if it is just oil cooled or both, turbo timers are cheap and will save your turbo from costly repairs

[Toy80Diesel]

The AXT kit is both oil and water cooled. But I have fitted a Pyro post turbo and I find this the most useful tool when driving. It teaches you to tow in the right gear to get the temps down, which in turn keeps your coolant at a nice temp. When I was towing and the exhaust temp went over 500c, I noticed the water temp climbed to just over the halfway mark. It always sits on half, but on a very slight downward lean, so I know if it moves that mm something is up. Once I backed off, and the exhaust temp came back to 350c, the water temp went back to normal. I haven't fitted a turbo timer, but if I don't switch the engine off until the exhaust temp comes back down to 200c or so, isn't that the same thing? Just letting it cool down manually rather than the timer doing it. I prefer to park the car in gear(manual) as well as the handbrake on!

[me3@neuralfibre.com]

Turbo timers are a wank. Pulled it off mine. Not needed except for HOT shutdown, and I'm not that stupid.

Paul

[malinda_um]

As far as I remember, 4wdsystems told me that their turbo is water & oil cooled and comes with a cast iron exhaust manifold. I went for the following:

Turbo Kit
Exhaust Kit
Pyro gauge
Boost gauge
RH dual pillar pod (for the two gauges)

I didn't go for the intercooler because I don't like the water to air units. Later on I'm planning on putting an air to air unit. I want to keep the factory look under the hood. I'll have the kit installed and ready to go early next week. Will let you know how it goes.

Are the toyota factory intercooler any good? I should be able to get one pretty cheap here.

[me3@neuralfibre.com]

Despite standard debate, ARE website reckons the construction of the factory cooler is very efficient. The downside they cover is strength of construction due to huge number of joins. To my mind intercooler leaks in a diesel are non criitcal, they always leak "out". I doubt they would be a problem at 7-15PSI.

The size is also limited.

Paul

[malinda_um]

Went and got my injectors serviced today. I was told that only one of the injectors were working properly (after a pressure test). I was also told that two of the injectors were leaking.

Got it serviced and installed. However I don't really notice a real difference in power. The engine seems slightly smoother... may be just a fraction more power.

Is that normal? I thought that if only 1 one the injectors were working properly I would notice a big difference after the service

Any thoughts on this????

[emaze]

I was looking for some improvement in towing so recently installed the Turbo Glide unit.
This is very basic, uses the Garrett turbo, 2yr. warranty.
The whole thing fits well and looks very neat installed (did myself, no dramas).
Without any adjustment to the fuel setting I now find that what needed 2nd. gear is easily accomplshed in 3rd. and so on. Cruises around 100 with van on (2000kg.), previously battling to maintain 90.
Fuel economy appears to be about identical.
The T/Glide crew are very helpful, they also insist that 9psi should be a max. boost for the 1hz., and that minimal fuel setting increase should be observed.
I somehow get the impression the 1hz. is slightly overfuelled as a standard setting (like Nissan, they do tend to smoke at higher speed) so the turbo produces better torque by a more coplete burn of the injected fuel.
Just my $0.02 worth.
emaze