Turbo Chargers

Submitted: Monday, Sep 08, 2003 at 13:58
ThreadID: 7102 Views:1900 Replies:7 FollowUps:6
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I guess this is an age-old question,
but I'm looking at putting a turbo on my LWB GQ TD42 mainly for more towing and hill climbing oomph.
Does anyone have suggestions/hints/brands to recommend/brands to stay away from?
Why does one brand say water cooling aint necessary while another says it is?
Why do some say fit an "aneroid" compensator or whatever it is while some say not necessary? (It's a lot of extra dollars!!)
Will my existing clutch cut the mustard or do I need to budget on a new clutch as well? Do I need a new exhaust? If so what's recommended (stainless steel or no ??) and what cost?
Will it affect my fuel economy much?
Any and all advice appreciated.

Thanks in advance, hooroo.
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Reply By: cruiser - Monday, Sep 08, 2003 at 14:43

Monday, Sep 08, 2003 at 14:43
I am probably wrong in what i am about to ask, but if you have a TD42, isn't that a turbo model anyway.
AnswerID: 30438

Follow Up By: Flash - Monday, Sep 08, 2003 at 15:20

Monday, Sep 08, 2003 at 15:20
Nup. TD42 is the standard designation for the normally aspirated 4.2 litre diesel.
FollowupID: 21484

Follow Up By: simon - Monday, Sep 08, 2003 at 15:20

Monday, Sep 08, 2003 at 15:20
TD42 is non turbo TD42T is turbo version
FollowupID: 21485

Reply By: simon - Monday, Sep 08, 2003 at 15:37

Monday, Sep 08, 2003 at 15:37
I would fit a HD clutch at the same time and when you have a few extra $$ fit a 3" exhaust, make sure what ever turbo you decided on that it has a 3" outlet to match the exhaust.
The water vs oil cooled turbo debate lives on!!
Its not suppose to make much difference on a diesel, watercooled ones have steamed from high performance petrol cars which run hotter temps.
The biggist risk with water cooled ones is if they stuff up water may enter and totally fu#% up your motor.
AnswerID: 30446

Reply By: Truckster (Vic) - Monday, Sep 08, 2003 at 15:55

Monday, Sep 08, 2003 at 15:55
Search the archives, the GQ has been done several times.

you will need a new clutch, exhaust, and your economy will suffer.

Fuel aneroid only if you run 12+psi

Watercooled isnt needed on a Diesel,

AnswerID: 30449

Reply By: nugget - Monday, Sep 08, 2003 at 19:01

Monday, Sep 08, 2003 at 19:01
I've got a Safari/intercooler turbo on my GQ. I bought it second hand and fitted it myself. I haven't replaced the standard clutch even though Safari recommend it with their intercooler system. After 20 000km it hasn't slipped yet even though it has covered 325 000km. 3" exhaust is the go aswell. Mine runs 11psi boost and doesn't have a fuel aneroid. Fuel consumption is around 11-12 l/100km on open road at 100-110 kph. If driven hard consumption does suffer.
AnswerID: 30484

Reply By: duncs - Monday, Sep 08, 2003 at 22:17

Monday, Sep 08, 2003 at 22:17

You are pretty right about the exhaust but not the clutch or fuel economy.

My GQ had aftermarket turbo with 3inch mandrel bend exhaust. Clutch was replaced at 243,000km because the rear oil seal went and filled it with oil. THe plate was just about shot anyway. The car was eventually sold with 385000k on the clock and no further problems from the clutch despite carrying 5 people and a large camper trailer all over Aus. The trailer had some 30,000k in 4wd country behind that car.

As for fuel I got similar figures to those returned by a work mate with a similar rig, including milage, but without the turbo.

A lot depends on how you use the right foot.

AnswerID: 30508

Follow Up By: Truckster (Vic) - Tuesday, Sep 09, 2003 at 00:09

Tuesday, Sep 09, 2003 at 00:09
Myself and a mate dont get anything close to the Pre Turbo fuel figures, and the clutch, if the car has lots o klms on it, and your towing, You would 'be advised' to do the clutch.

And its left foot :)~

[ View Image]
FollowupID: 21558

Follow Up By: duncs - Tuesday, Sep 09, 2003 at 16:20

Tuesday, Sep 09, 2003 at 16:20
Ahh Truckster,

I know the clutch is a left foot thing but the fuel economy is a right foot thing. Move your camera a little to the right.

I am only passing on what I hae seen in my own experience.

FollowupID: 21619

Follow Up By: Truckster (Vic) - Tuesday, Sep 09, 2003 at 19:37

Tuesday, Sep 09, 2003 at 19:37
Mine is an Auto, I only have Brake and Loud pedal..

and its not a trick photo..

FollowupID: 21657

Reply By: Member - Ken - Monday, Sep 08, 2003 at 22:59

Monday, Sep 08, 2003 at 22:59

I had a turbo fitted to my 97 1HZ(D) Troopy about 2 yrs ago after much research and the sleepless nights you are currently experiencing.

The following is the instal I have:

Turbo: Dynamic oil fed/water cooled
Aneroid: Yes supplied and fitted
Exhaust: Factory fitted removed and straight through 2.5inch with mandrel bends and resonator fitted.
Pump: Removed, aneroid fitted, bench tested/tuned to specified boost.
Injectors: Removed, inspected by pump tech, (cactus - pitted) replaced
Clutch: Same old factory fitted original


Performance: Increased out of beyong expectation. Up hill, passing, towing, into the wind pulling 3.5 tonnes - not a problem at all.

Fuel: If I sit on 100kph and drive carefully - 13.5L to 100K's
If I sit on 100 -120kph and give it a bit of stick - 15.5L
4WD (Simpson Desert) maintaining 2000rpms and driving carefully - 13.5L

Turbo: Why Dynamic - recommended by fitter and others.

Pump/Aneroid: An aneroid is a altitude/boost compensator that NOTE: Toyota fits to its factory fitted turbos. This do-da when fitted controls fuel to boost ratio:
To have it fitted correctly(note I say correctly) it should be done in a pump shop by a tech who knows what he/she is doing and then bench tested/ajusted accordingly.
I am not going into the why's and wherefore's of this device as that will just invite the 4WD leftwingers and Rightwingers to explode from the starting blocks with all guns firing. However I will say it is a personal choice thing, also big dollars, but if you speak to the right pump shop tech who knows his bleep , you will be able to make an informed decision.

Exhaust: This one took a while to figure out as I left the factory fitted one on initially. The turbo-lag factor just became an embuggerance that finally forced me to do something about it. The answer came from Dynamic HQ'S in Qld and it was this easy.

(a) Replace factory fitted system with a straight through set of pipes using mandrel bends. (yes it followed the original pathway)
(b) Replace factory fitted muffler with a straight through resonator
(c) Maintain pipe size to that of turbo exit port (2.5 inch)

I had this done by an exhaust specialist workshop in Melbourne who new exactly what I was on about as they had done a heap of R&D on exhausts for Safari turbos.

Noise Factor - nothing really, less than factory fitted setup. Why - allegedly the turbo disappates the exhaust noise as it exits through the turbine.

Size - Dynamic informed me that going bigger than the turbo exit port to the 'magical' 3inch say, improves things about as much as blowing out the window to assist forward motion does. If the turbo you select has a 3inch port, well then you use a 3 inch system and not a four inch because bigger is better.

There will be some readers who say, damn, I know of Dynamic supplying 3inch exhaust port pipes. Yep! you are right, however the man from Dynamic will tell you that is to compete in the market with the 'magical' 3in that some of the factory fitted models come with.

RESULT Very little turbo lag, a tad more power - however no improvement on the fuel consumption.

Overall: It is now a GO machine when I want it to be compared to the dead dog I purchased 3yrs old and with 30000kms on the clock. I am extremely pleased with the results.

Extra Info: If you end up having a turbo fitted ensure the fitter WELDS the return oil port into the sump.

Make sure you use/purchase clean unadultereated fuel. I know, I know this a keenly debated subject, however once again ask the pump shop guru's what is the cleanest fuel available.

Hope this sheds some light on the subject for you regardless of what type of turbo you end up with or decision you make.

AnswerID: 30522

Follow Up By: duncs - Tuesday, Sep 09, 2003 at 16:28

Tuesday, Sep 09, 2003 at 16:28

I also had a boost compensator (aneroid) fitted. This was not on the car when I bought it.

The fuel tech who fitted it said most installers screw up the fuel to keep up with the extra air from the turbo. This means that most of the time you are running rich. Fitting it helped an overheating prob.

It could also explain why mine seems to have returned better fuel figures than some are talking about.

FollowupID: 21622

Reply By: Flash - Wednesday, Sep 10, 2003 at 00:05

Wednesday, Sep 10, 2003 at 00:05
Thanks all for the info..... much appreciated.
Any further posts appreciated.
AnswerID: 30643

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