Nissan Patrol 4.2l turbo diesel go faster???

Submitted: Wednesday, Apr 01, 2009 at 19:21
ThreadID: 67420 Views:25693 Replies:10 FollowUps:1
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I took my Patrol to the Beaudesert exhaust people and got a 3 inch system fitted. They did a fantastic job and the car does go a fair bit better. I was told by the Steinbauer people I can't change the chip because it has a mechanical fuel pump. That makes sense.
What else can I do to make it go a bit better.
Any advice would be appreciated.
( I can see the answer buy a Landcruiser the keyboard, I got a landcruiser)
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Reply By: Lotzi - Wednesday, Apr 01, 2009 at 19:28

Wednesday, Apr 01, 2009 at 19:28
G'day Reiner
Ok, now take it to a good diesel tech and get the pump and injectors checked / adjusted, or even dynoed. Air filter check also helps.
AnswerID: 357511

Reply By: Turbo Lux - Wednesday, Apr 01, 2009 at 19:42

Wednesday, Apr 01, 2009 at 19:42
Hi G Reiner

in the past I have recommended Highway Diesel at Coopers Plains, they are diesel injector specialist and whole lot more, they use steinbauer chips along with rebuilding fuel pumps and injectors, from memory they have built fuel pumps and motors for Outback Challenge Patrols in the past and a fair few comp trucks. I had my cruiser woked on their and the service was great. Talk to Craig he will help you out with any advice you need.

hope it all goes well
AnswerID: 357515

Reply By: psproule - Wednesday, Apr 01, 2009 at 20:09

Wednesday, Apr 01, 2009 at 20:09
Pity you are in QLD. Scott from Denco lives two doors from me and owns a 4.2 TD GU. They seem to have used it as a bit of a development mule for a series of their performance mods. AFAIK it has a different turbo, intercooler, exhaust and the requisite pump mods. I dont think a 4.2 will ever be a rocket but it definately does go and makes a sweet truck like sound to go with it.
AnswerID: 357523

Reply By: Trevor R (QLD) - Wednesday, Apr 01, 2009 at 20:42

Wednesday, Apr 01, 2009 at 20:42

How many k's has the rig done? Have things like the injectors or fuel pump been played with?

Next thing on the list is the dump pipe on the back of your turbo. This is certainly something to do even if you do further mods so it would be worth the $150 to try this anyway before anything else.

Now is the time to be careful as after these mods it gets expensive for smaller but still noticable results. People like Mike Vine turbo's Capalaba or MTQ Toowoomba will give realistic expectations and dollars you can expect to shell out for these results. I would recommend both but they both offer different opinions and results. Depending on your requirements as to which one suits you is something for you to decide after you talk to each of them.

Plenty of other info in the history pages of this website and others if you have a spare few days to read through some of it as well. I have a dyno sheet of one of my GU's in my rig pics if you want to see realistic results you can achieve if you want to. Truckster posted impressive results in a thread started by Ingo57 not long ago, this thread would also be worth finding.

Good luck with your search for power.
Regards, Trevor.
AnswerID: 357538

Reply By: Robin Miller - Wednesday, Apr 01, 2009 at 21:16

Wednesday, Apr 01, 2009 at 21:16
Hi Reiner

Won't suggest you get a Landcruiser, but its cheaper to upgrade to a petrol patrol , and you get brakes as well as the power.

At least 2 of my friends have done the turbo improvements at a mild level and felt the expenditure worthwhile - but I gotta say there cars are still pretty slow.
Robin Miller

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AnswerID: 357552

Reply By: S&N - Wednesday, Apr 01, 2009 at 21:25

Wednesday, Apr 01, 2009 at 21:25
the other thing to think of is, if you do all of these other mods one at a time, you may/may not notice much of a difference after each mod (even though it is there). if you save your penny's and do it all at once you will defiantly notice the power jump. i say this because when i had my wrx i did heaps of mods, bit by bit, and was dissapointed by the performance gains. until i whacked it on the dyno and it was putting out 174kws at the wheels......they are 90-95kws at the wheels standard. each mod felt SLIGHTLY better but nothing massive.......but the figures speak for themselves. you dont want to spend thousands of dollars over 6 months and not be happy with the PERCEIVED power gains, when you could do it in one hit and say "OH MY GOD"

just my two cents worth
AnswerID: 357557

Reply By: Flywest - Wednesday, Apr 01, 2009 at 23:40

Wednesday, Apr 01, 2009 at 23:40
With the govt rebates - you could get the diesel gas injection added, for not a lot of $ and pick up another 30 Hp or so at the rear wheels.

After that you could add an air to air safari intercooler for probably another 25 hp gain at revs.


AnswerID: 357587

Follow Up By: Dunedigger - Thursday, Apr 02, 2009 at 18:54

Thursday, Apr 02, 2009 at 18:54
Gas will make a big improvement 20%-30% better with economy to boot. Makes a old style diesel feel like a petrol engine

FollowupID: 625819

Reply By: Member - Roachie (SA) - Thursday, Apr 02, 2009 at 08:18

Thursday, Apr 02, 2009 at 08:18
Some blokes get upset with me for saying this , but here goes.....(again).......

If you want overall speed, good acceleration from a standing start, etc etc; you really should have bought a 3 litre..... they go like the clappers!!! I refer to the 3 litre as "a car".

However, what you have there is what I call "a truck". For starters it has a higher final drive ratio that the 3 litre which partially explains why it "lopes along" the highway at lower revs.

The 4.2 was never designed to be a speedster; although blokes like Trev have done enough to their rigs to make them into a pretty close resemblence of one.

Just my 2 cents worth......

AnswerID: 357610

Reply By: Isuzumu - Thursday, Apr 02, 2009 at 08:54

Thursday, Apr 02, 2009 at 08:54
Before you do any more mods for power gain you should fit a boost gauge and a EGT (exhaust gas temperature). these two instruments will help you gauge how much or should I say to much of a power increase you give it. One of the places I took my MU to for a dyno tune did not have a EGT gauge to fit to the exhaust so they could watch the temp. You start to put to much fuel into it and bang you melt the top of the pistons.
But the best gain I did was to fit a air to water intercooler, it was even noticeable on the normal temp gauge that it cooled the motor quite a bit. All the best in what you do and if you follow Trevor R advise you will not have any problems and that truck sure goes hey Trev? LOL
Cheers Bruce
D.Max and Jayco Outback

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AnswerID: 357614

Reply By: Member - Oldplodder (QLD) - Thursday, Apr 02, 2009 at 09:25

Thursday, Apr 02, 2009 at 09:25
Had Bdt exhausts fit a 2.75" to the Paj.
The new dump pipe and bigger exhaust allows the turbo to spool up sooner too, less turbo lag, and more boost at lower revs.
I now change air cleaners more often, it also helps the engine breath better.
I have an EGT and turbo boost gauge, and as Isuzumu says, this gives you a chance to see where possibilities are.
Like your 4.2, my diesel is the older mechanical pump design, so chiping is not an option.
What I have done is put a hand controlled boost controller on (set and forget, about $50.00) , and turned the boost up another 2 to 3 psi.
Then watched the EGT to see what temps I was getting at places like the Toowoomba range. Turned up the fuel about 5% to get 650 to 680 deg C max before the turbo.

I have bigger tyres so less power to the wheels, but it now pulls up the range in 3rd, and has spare power when sitting on the speed limit. Cars need to pull over to let me through! That didn't happen before.

Other option for more power is to go for smaller diameter tyres. :o)

On a run up the Blackbutt range the other weekend was managing to stay ahead of a stock 3.2l diesel NP pajero, so the stock 92 kw must be up near the 110kw of the 3.2. But the torque improvement is amazing, so learn to drive it using the torque.

If we were all really serious about power, we wouldn't be driving 4wds. :o)
Was overtaking B doubles/road trains going to Roma a couple of weeks ago without too much of a worry, and getting 120 to 130k reasonably easily.

Otherwise I just keep plodding along, letting the grey hair blow in the wind.

(So maybe get a pajero!)
AnswerID: 357622

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