Outer Limits 4x4 Board

Bought a 100 series 1HZ and am about to fit up a MTQ Kit to it.
I spoke to a well known melbourne Diesel company today seaking info on tuning up after i fit the kit.
And they told me i will need a complete pump overhaul and a boost compinsator fitted, also new injectors. i was a bit taken back due to the price i need to now factor in to my job.
I am prepaired to do it properly if that is what is required, i do not want a half arsed fitup that frys my motor.
Is this info they gave me correct or is it a "upsizing" on the job.

Any opinions or info would be great.

depends on wat sorted power u want. i know with gq's u can turn the pump up and get some power with a dyno tune, and for alot of people that is enough which is wat i have done.

Depends on what sort of reliability you're after, power and fuel efficiency you expect, etc. The 1HZ in the 100 is more frail than earlier models, and has to work harder dragging the larger truck around.

The fuel system ideally needs to be in tip top condition, as the 100's are getting on nowdays pump condition will be deteriorating - they are a wearing part, just like injectors.

hdj105 wrote:Depends on what sort of reliability you're after, power and fuel efficiency you expect, etc. The 1HZ in the 100 is more frail than earlier models, and has to work harder dragging the larger truck around.

The fuel system ideally needs to be in tip top condition, as the 100's are getting on nowdays pump condition will be deteriorating - they are a wearing part, just like injectors.

Jeeez thats a worry, i went for a later model thinking it would be more reliable and a healther engine, i hope i havent made a mistake, all i have every heard is the 1HZ motor is one of the best.

how many kms has it done??

Barno111 wrote:how many kms has it done??

how many is too much to turbo??

Barno111 wrote:how many kms has it done??

one owner,full service history, 198,000 ks

i wouldnt be turboing something that has done more then 200 000 without rebuilding first (doesnt have to be complete rebuild just tear down and check)! Just my thing others can disagree with me, but i think after 200 000 the motor has done a fair bit work. and if you want to go running boost though it i would be checking everything out first and replacing gaskets! You dont want to do something, then completely redo it just becuase of a blown head gasket or something stupid! Also at this stage i would get the head recoed! or even replaced with a turbo head! Fuel pump should be fine depending on how much boost you really want to run! But i would probly get the pump checked out and also injectors cleaned! if replacing injectors also get your pump overhauled (just another thing)! My boss has been in the game for over 40 years working and building everything from big 8s to small racing outboards! You may not have problems to start off with or you may not have any problems! but there is a fair bit of stress put onto the engine when turbo and these are factors that have to be considered!

if the engine has had a good life well maintained and u plan on only runing low boost i dont see a problem at all.

turboed my bros gq with 195k on the clock ran fine (sold engine) then put turbo on another engine with 300+k on the clock but it had a rebuilt bottom end it is running 12/13psi atm and running strong and fine. everyone will have there own opinion and being different engine to urs may be a different story all together

It's probably a good vehicle for its age and condition.

As others have mentioned, the advice they have given you is correct. You need to have to fuel system in tip top condition and propwerly working injectors to get the most out of the MTQ system.

I don't think they are upselling you, maybe just wanting to make sure you are aware that there are other things to consider to get the most out of the MTQ system other than just slapping a turbo kit onto it.

Depending on your budget, I would consider what they have suggested and would also think about putting a better exhaust on. EGTs can get pretty high with the extra power from the turbo so a decent exhaust system is also worth considering to keep temps lower.

I've got the DTS system with a top mount intercooler, Nissan Bonnet scoop, 3" Mandrel Exhaust and boost compensator. The injectors were also done when the DTS kit was put in.

The boost compensator was put in a few months after the DTS kit went in and i've got dyno print outs before and after the boost compensator and it made about 20kW difference at the rear wheels.

You will enjoy the power upgrades from it!

T_Diesel wrote:It's probably a good vehicle for its age and condition.

As others have mentioned, the advice they have given you is correct. You need to have to fuel system in tip top condition and propwerly working injectors to get the most out of the MTQ system.

I don't think they are upselling you, maybe just wanting to make sure you are aware that there are other things to consider to get the most out of the MTQ system other than just slapping a turbo kit onto it.

Depending on your budget, I would consider what they have suggested and would also think about putting a better exhaust on. EGTs can get pretty high with the extra power from the turbo so a decent exhaust system is also worth considering to keep temps lower.

I've got the DTS system with a top mount intercooler, Nissan Bonnet scoop, 3" Mandrel Exhaust and boost compensator. The injectors were also done when the DTS kit was put in.

The boost compensator was put in a few months after the DTS kit went in and i've got dyno print outs before and after the boost compensator and it made about 20kW difference at the rear wheels.

You will enjoy the power upgrades from it!

Thanks for the info, i am i bit put off buy the replies stating the turbo can be harmful, i thought these motors were very reliable and suited turboing very well, i am more confused now.
I went for the Tojo over another GU, but i now have read alot of negative reports about the 1HZ

just what i think as i have a 1hz and turbo'd it at 215000 with an dts kit from mtq (12 psi) and had a 3 inch
exzost put on goes real well but i thought would be cool to replace the silcon hoses with other ones (cheap coloured 1s) turns out they wernt stiched slicon hose and one split whilest driving in the dunes and my motor coped a gut full of sand so i put the old ones back on wanted to see how long it would last becaues i guna go with a v8 and it still goes hard till today at 245000 on it with out missing a beat but i will rebuild it one day and run higher boost
just what think cant kill em

Mate dont get me wrong with what i said! Im running a 1hz with a DTS or MTQ (whatever you want to call it) Turbo kit with 13 pound boost no dramas at all! Its just when mine was put on the motor only had 60k on the clock! Even with patrol engines i wouldnt be turboing after 200 000 without a strip down atleast! 200 000kms is alot of work when you think about its alot of time those pistons go up and down inside that bore! The 1hz is a great engine and very reliable. when you go to turbo something that was N/A there is some things you have to take into consideration!

i have just turboed mine (80 series), just before crissy, i put a 1HDT manafold on with an adapter plate to fit a garret (the plate is made by matt mcinnis) it all bolted up very good, my motor has done 330000 ks on the weekends i will run 16 pound and max fuel mid week (i use it ever day for work) i run not as much fuel (burn 14 Lt per 100) and run 10 pound, onld problem i had had is some times it will starve of fuel, like 1 in 100 full power take off it will starve.

my car is 16 years old and i dont think the injectors have been done, sure it will go better with them being tuned but it still goes now and loves the turbo, a boost compensator will mean you will burn less fuel and will have less smoke, if that dosnt worry you then why spend the money. Just keep an eye on the EGTs and it sould be fine

Barno111 wrote:Mate dont get me wrong with what i said! Im running a 1hz with a DTS or MTQ (whatever you want to call it) Turbo kit with 13 pound boost no dramas at all! Its just when mine was put on the motor only had 60k on the clock! Even with patrol engines i wouldnt be turboing after 200 000 without a strip down atleast! 200 000kms is alot of work when you think about its alot of time those pistons go up and down inside that bore! The 1hz is a great engine and very reliable. when you go to turbo something that was N/A there is some things you have to take into consideration!

x2

"Also at this stage i would get the head recoed! or even replaced with a turbo head!...................."


you can't put a "turbo" head on a 1HZ

1HZ has precombustion chambers in the head. 1HDT has them in the pistons.

For all the money you are going to spend on a Boost compensator, overhauling etc etc, serious consider putting a factory turbo motor in it.

do a search on turbo 1HZ on here and you will find a few pros and cons, cons being they are apparently prone to damaging heads and combustion chambers with medium amounts of boost.

Why not do it in steps. Fit the turbo and reco the injectors, set the fuel on a dyno and monitor exhaust temps. Then down the track if you wish, remove the pump and fit a boost compensator.

This will at least get you going.



Andy

i hate it when people say 'boost' is to blame for a diesel engine damaging heads...

Its EGT's people...

Keep and eye on your exhaust temps at all times and there is no reason why a 20psi 1hz wont last as long as a 10 psi one...

Z()LTAN wrote:i hate it when people say 'boost' is to blame for a diesel engine damaging heads...

Its EGT's people...

Keep and eye on your exhaust temps at all times and there is no reason why a 20psi 1hz wont last as long as a 10 psi one...

x2 zoltan. i turbo'd my 1hz at 300 000 with a dts kit running 10psi i recently added an intercooler and it helped with the torque, it hasnt had an easy life since i tow a car trailer with 1.5t excavator over the gateway bridge and 3rd gear at 3000rpm exhaust temps barely move. as long as u keep an eye on the egt temps then it will be fine.

x 2 with Dzltec do it in steps.

x3 z()ltan, 1HZ gets plenty of bad publicity but a correctly set up 1HZ with aftermarket turbo should give you a long life. Plenty of people run them and have no issues.

I'd rather have a good well looked after 1hz a with new turbo kit properly tuned then spend huge money to convert to a tired 1hd that would need everything reco'd on it.

I'll add my vote for a turboed 1HZ, if set up correctly and properly monitered.

If I suddenly find myself sitting on a "spare" $10k, I'll swap the engine. Doing it in steps certainly helped.

I have just bought a 105series with 200k km on the clock. I will mostly probably turbo it. Mine has been serviced every 5000kms, and at 200,000kms I reckon it is just run in. 1HZs that have been looked after are known to have done over 1Million kms without overhaul.
There are lots of stories to support turboing the 1hz and lots to say dont do it. I think they need to be treated differently to the factory turbo engines.
I will run 3" exhaust and front mount intercooler. an EGT gauge is essential too I reckon.

To put a decent factory turbo engine in the car, you will spend a lot more than what you will spend on turbo, exhaust, intercooler etc for the 1HZ

1HD-T reco $5500 (bare long motor, so no turbo, no pump, no manifolds etc)
turbo and manifolds $1500
exhaust $7-800
fuel pump $2000-3000 (usually need an exchange unit)
and injectors $800 exchange

or buy a running 2nd hand unit and reco as needed

My reason behind saying look at going factory turbo engine (1HDFTE not 1HDT) was due the the initial post saying he needed a full injector pump overhaul, new injectors, boost compensator and then others saying he needed to pull the engine apart and basically recondition it. (I agree 200K is stuff all for a 6 cyl toyota diesel engine).

When you add up the cost of the above parts, (plus include a good turbo set up and intercooler) the cost is getting up there.

I would suggest sitting down and working it out on paper as pros and cons for both setups, I was merely suggesting another avenue.

Yes, boost itself is not the problem when turboing a 1HZ, but what is the point of running 20psi (or what ever psi) boost if you dont wind the fuel up to match it?

The factory turbo conversion may be slightly more expensive in the long run, but will be the better engine at the end of the day. Plus, there is quite a few 1HDFTE engines out there with less than 100K on the clock....... and, you have the good 1HZ to sell.


just putting another OPTION out there.......

I had noticed an engine and trans on the net in Perth, so for interest sake called and got some prices. The HD-FTE engine $8.5k, and 5spd auto $2.5k seemed good value, this is the combo I would love, given suitable budget.

There is quite a bit more required to make this work in my vehicle, other combinations would require less effort/cost. Even if I got $4k for my second hand engine and $1k for the box/transfer (any offers?) I am still infront. Wiring, cost and time, and gearbox tunnel mods all add up, and, I need this to be reliable. I'm sure there are plenty who will disagree, especially with the number of times this question comes up!

Like I said, this isn't the 'best' solution, but for tighter budgets (and time constraints, I don't think I could do this in 4 days like some have) I believe this a workable solution for improvement of our 1HZzzz set-ups!

Cheers.

Great wide spectrum of veiws and opinions!

I have been offered a MTQ kit that was fitted to a 100 then removed coz something disastress happened with fuel and overtemp.causing a complete engine failure.
The owner had it removed by my machanic, and the owner didnt want it back on.
The kit had done under 1000ks.

I can get the kit for $700.
Injectors $740-$800.
Pump overhaul and boost comp $1800.
just weighing up risk against power!

I have been offered a MTQ kit that was fitted to a 100 then removed coz something disastress happened with fuel and overtemp.causing a complete engine failure.
The owner had it removed by my machanic, and the owner didnt want it back on.
The kit had done under 1000ks.

the mention of "complete engine failure" just makes me cringe.....

have it checked out first BEFORE you buy it. If you do buy it, have it tuned by a professional experienced diesel mechanic.

Get an EGT gauge and Boost gauge.

flyology wrote:

I have been offered a MTQ kit that was fitted to a 100 then removed coz something disastress happened with fuel and overtemp.causing a complete engine failure.
The owner had it removed by my machanic, and the owner didnt want it back on.
The kit had done under 1000ks.

the mention of "complete engine failure" just makes me cringe.....

have it checked out first BEFORE you buy it. If you do buy it, have it tuned by a professional experienced diesel mechanic.

Get an EGT gauge and Boost gauge.

From what i was told the guy bought the kit, fitted it himself and just cranked up the fuel screw, 1000ks something went bang,pop, Hmm with a piston. then blamed the turbo kit, had a big blew with mtq, i they told him "to bad, too sad. "you sould have had a pro tune it.