Why does my Patrol Struggle to do 115-120kmph

Just did fuel filter only 500k's ago.

what size tyres you run??

Well at least that's out of the equation now.

Sorry Wayne, you beat to my reply. I run 265/75/R16 STTs.

agree, but top end can be the first sign of something wrong, ie...it's when the most HP is required to push the air....any ideas??

well at last check it was 110, If you travel at 110 in the Pilbara even the Cop's will overtake you LMAO.

More to the point try getting past a triple trailer road train without going over 110, it just isn't going to happen SAFELY.

I was going to post a nasty reply to your supersilious comment brian, but on reflection ---- I will.

The guy is trying to diagnose a possible mechanical problem, and you very helpfully give the reply you did.

Top marks for dumb post of the week.

And in Australia, it's still an aeroplane.

thanks mate....i was awaiting the , "whats the speed limit" and "you should get a toyota" replies.

What - trying to solve a mechanical problem!!!! Seems more like an attitude (to road safety) problem to me.

I think your interpretation is wrong, DIO.

But you're welcome to jump into your Range Rover and head to the airport at 85k on the freeway, you'll be serving the road safety cause, and you can even stop quickly if you feel the need for a cucumber sandwich.

Cheers

brian,

its blokes like you that cause blokes like us to 140. you are a road hazard at that speed. you think your doing the right thing but not even close. 15+kph under the speed limit should warrant a fine.

I do not like cucumber sandwiches or idiots who speed needlessly.If you want to wipe yourself off under a roadtrain that is fine by me except that my third party insurance increases to cover the costs incurred by your funeral.
Kind regards
Brian

Many of us do not like idiots who drive at 85ks.

If you can afford your Range Rover, Mr pompous, the cost of third party wouldn't even be something you are aware of.

Perhaps you should try a cucumber sandwich, it's a brain food.

What's good for you isn't necessarily palatable.

Brian your Funny.

My 79 year old grandfather drives faster than you and he's been driving for 64 years and he's still around.

yes that right he was driving before he held a license.

Gerhard,
I apologise profusely. I came to this site attracted by the "Exploroz" and honestly I did think it was aimed at promoting touring Australia and the sensible use of 4X4 vehicles.
I have completed a little over 40,000kms in the past two years and met many fine and interesting people.
Apperantly I was wrong.
I shall not return to this site again and I wish you, and your fellow people all that you wish for yourselves.
Please put a sticker on the rear of your vehicle stating, "I am an bleep " and, should I ever find you in trouble, I will leave you right where you are and continue on my way eating my sandwiches
Kind regards
Brain

Stupid coment
When i bought my 80 during the test drive I held it flat to see how fast it would go
WHY?
well not coz i wanted to drive at 150kph everywhere thats for sure but to make sure it went as fast as it should which would give me indications of the engines condition or fuel pump injectors are all working as they should
driving at 85 by choice is one thing doing it coz you vejhicle has a major problem is another

Diddums Brian.

Occasionally I have borne the brunt of making stupid comments on this forum, even though I maintain that I always talk sense.

But I didn't lift my skirt and run - I occasionally get even when someone else does the stupid.

The people on this forum have been enormously helpful to me when I have had questions that needed an answer, expecially when preparing for my "Exploroz" trip last year.

What people here don't seem to like, is being preached at by a newby who has never had a speeding ticket, about the dangers of travelling at even close to the limit.

Now you do have a choice - you can prove you are pompous and vanish from here, or you can take a bex, have a good lie down, and continue to enjoy what's available.

I'm sure you have more to contribute than what you have said so far, just cut out the swear words which get a red bleep. That doesn't help your image.

Cheers and see you later...

Brian,
OBVIOUSLY you have never travelled any great distance across this vast continent, or if you did you were probably one of the tosspots that causes people to overtake, drive to the speed limit where sensible or put your licence back in the cereal packet that it came from. On the last friday funny, there was a post about the need for idiots to carry 'I am STUPID' signs, where the hell is yours?

If I am going to puch pass a triple dog road train then I would absolutely love to have a 500 cubic inch supercharged big block V8 under the bonnet, purely for safety reasons. The least amount of time spent on the other side of the road the better, for all parties concerned.

Wayne,
Have you checked
Air filters?
Inline fuel filter from main tank?
even clogged pick up in main tank????

On my 2.8 GU I pulled off both the fule tanks at christmas and had both cleaned. From them I would have got about 2 cups of gunk out of them. I have since installed a secondary CAV fuel filter (with sight glass) and small boost pump to make sure this rubbish cant get near the donk. The CAV filters are only about $4 eachc(change every 5k) and filter to a better standard than the main fuel filter. Very quickly paid for itself as now I change the main filters every 10k instead of 5k.

From what you describe I believe it would be a lack of fuel not boost pressure, especially as you have just got the turbo tweaked.

Ben

PS: There should be a fine for those on designated highways who drive less than 10 km/hr under the speed limit. AS old mate said "its common sense........really"

Benny,
Where did you ever see " triple dog road train".
You may care to read all the posts Benny and you will find that I move over when I see (out of my rear vision mirror - you know the thing that you admire your face in) a vehicle coming up behind me. I would even pull over for you.
Sorry fellows, my curiosity got the better of me.

Benny,
Where did you ever see " triple dog road train".
You may care to read all the posts Benny and you will find that I move over when I see (out of my rear vision mirror - you know the thing that you admire your face in) a vehicle coming up behind me. I would even pull over for you.
Sorry fellows, my curiosity got the better of me.

Benny,
Where did you ever see " triple dog road train".
You may care to read all the posts Benny and you will find that I move over when I see (out of my rear vision mirror - you know the thing that you admire your face in) a vehicle coming up behind me. I would even pull over for you.
Sorry fellows, my curiosity got the better of me.

Apparently your seeing triple....
And your question "where did you see a triple dog road train" just proves that your 40k you claim to have travelled was probably from home to W@nkers'R'Us daily. triple dogs are very common through the outback, just the the sheer economics of moving three (OR MORE) trailers instead of one. Last year enroute from Lawn Hill to Karumba I had to punch past a road train with no less than 4, yes FOUR, dogs that was travelling at 115km/hr on a dirt road. Yeah the speed limit was 100km/hr but the 2.8 just doesn't know when to stop!

As for a 'rear view mirror' whats that, something you english folk admire your pasty white behinds in???

And just remember, curiosity DID kill the cat, and from the above it appears that you just got back slammed for a ridiculous comment that caused a genuine thread to become severely sidetracked.

Get back in your RR Brian, turn up the opera and forget normality for a while, the rest of the world will be grateful.

Ben

I live in a rural area of SA and nothing irritates me more so than getting stuck behind some tosser tootling along at 85k's an hour. They are a menace on the roads as traffic banks up behind them and thats when accidents happen No they don't have accidents THEY CAUSE THEM. Nor do they move off the road either because our roads aren't like the ones in Canberra choked up by Landrovers travelling at 85k's an hour.
Brian, just a suggestion for you, get yourself a UHF radio and put it and leave it on Ch 40 and listen to what the truckies think of you.

Benny, you were going sooooo fast you needed to pass a road train exceeding the speed limit by 15 kph. Soooo in fact you were well and truely over the speed limit to catch up to it in the first place. Here in WA the maximum length for a road train is 53 metres and to pass a road train that long will take you how long?
Work that out and you will find out who is the nutter. What about the poor bugger coming the other way through all that dust!
Des Lexic, you appear to be well named. I had a UHF radio and spent a little time listening to the gross conversations on it. I turned it off, left it off and then sold it.
By the by, I did drive a road train (semi and two trailers) from Geraldton to Burrup. Sitting up there "driving" the big Scania and watching the tacho and shifting the synchro box when the revs were correct. My wife's little Lancer is just as easy to drive except for the allowance of the 46 metre length.
Grow up! I have been there done that - that is how I can afford a RR.
Bye bye w@ankers!
Brian

Listen Bozza in QLD and the NT things are done differently. I normally cruise at 130km/hr across any great straight road as the Patrol feels more stable at this speed than 100 km/hr. Fuel consumption isnt any worse than 110mk/hr and when reeling of a 1000km/day it is two extra hours I've got up my sleeve.

Reson why you sold the UHF radio; the 'gross conversations' were probably between p!ssed off drivers mutually debating what to do to that toss in the Rangie who is travelling at 85km/hr in a 100 zone and for no GOOD reason is slowing them down. I do suppose all these threats/remarks/obscenities would get a bit depressing after a while.

I didnt particualry care that you have a RR.....until you started using it as some sort of moral high ground. Grow up PLEASE

one of my mates failed his first driving test for traveling at 70km/hr in an 80km/hr zone. was told that it causes accidents and road rage!

Benny,
Your Patrol feels safer at 130 than 100? It must be the only one in the world to feel so. If you really need to travel at 130 clicks I suggest you get a Jaguar or Mercedes. Much safer and more comfortable.
The reason I have a RR is that I like it. If you are interested I have had a SWB Land Rover, two LWB Landrover, one Land Cruiser and a Suzuki 3 cylinder ( you know the little unstopable with the trail of smoke following it!) as well as numerous sedans.
This is my second RR and if possible I will buy another later.
It is thugs like you that give ordinary 4X4 people a bad name. Most people I have met either drive 4X4s to tow caravans or because they genuinely want to go into the bush. Not to impress some other cowboy on the outback roads. Some time look in that rear vision mirror thingee and see how much dust you raise causing a hazard. The Station owners do not appreciate you spoiling there stock feed either.
Please think of others if you can think at all.
S&N
Your mate failed because he either did not know the law or was intimidated by the examiner sitting next to him. However the examiner was at fault by saying reduced speeds cause accidents. People cause accidents.

Your an idiot.

The old man has been a cop for over 35 years and has seen more dead body's and car crashes than i would care to see, and i can tell you his pet hate is morons like you who sit well under the posted limit cause you think it is Safer.

Mate if you can't drive confidently at 110km/h get off the Road.

Exploder,
Since your daddy is still seeing dead road accidents after 35 years, it is safe to presume he is still a Constable or at best a Sergeant.
His mentality is about the same as yours. READ all the posts, you are allowed to move your lips so that you can understand.
After 35 years "in the job" Daddy should be about the right age to take his pension and ride around with you giving the benefit of his many years of experience.

Brian, your quote "I shall not return to this site again" is revealing you to be a liar.

You not only talk crap, but you are not a man of your word.

And you resort to childish slanging when you have painted yourself into a corner.

Now be a good fellow and don't return, like you promised.

Gerhard,
You may not be aware (I was not) that when a reply is made to a comment an email is sent to the originator. If you are so concerned about a person commenting on the ascinine comments posted you would not post them in the first place.
By replying (as a third party) to the comment that I made to Exploder shows that you keep returning to this post.
Crap?
What has eating cucumber sandwiches to do with exceeding the speed limit?
I travel to see the country not to see how fast my RR may be able to go. I do not stick to the bitumen and go so fast as to be able catch up to a vehicle that is already speeding and then try to pass it.
My next venture is to go from Wirrulla to Kingoonya and then on to Oodnadatta. That is the reason I have a 4X4. I understand that in good conditions it takes 6 to 8 hours to cover the 300 odd kms. Try doing that in your vehicle and see how you fare.
Now if you do not respond to my post and I do not get an email, I will not come back.
The ball is in your court.

That's the problem when you avoid brain food - you don't know how things work.

If you did know how this forum works, you would be aware that I, as well as you, receive an email every time someone posts a follow up to the thread.

Now I'll explain the cucumber sandwich to you, since you are clearly the only one who doesn't understand.

When a person brags about how much money they have, they are regarded by regular people (many of whom actually have more money) as a toff. Toffs eat such things as cucumber sandwiches at their dinner parties while discussing how they can treat peasants more badly than they already do. So you see, dear boy, the comment was a serious insult - but you're so dumb you didn't get it. Never mind - others have been more blunt, and called you an idiot.

Bragging about how you drive a RR at 85k to save the nation makes you a double toff, and you can see from the replies lots of people agree about that.

But when a tool is offered an olive branch, he just keeps barging on down the same track to the cliff edge. In case you can't get that, I mean when I suggested that you might reconsider your threat to leave forever, and give and get some value from this site, you just kept getting more stupid.

So again, I invite you to be a man of your word, and don't return - you promised, but you keep coming back. Blaming me and putting the ball in my court is nonsense.

If you speed wankers would drive decent cars/trucks you would not worry about anybody driving 85 in the country ..
takes me 3 seconds to get past him and 5 seconds with the boat in the back ...

grow up and worry about something important ... like cleaning up your mess you leave out there ...

get a life
gmd

To Brian Purdue
I have just read all of the crap and you could be classified as a goose, if you want to do 85klm/hr thats fine but don't bag other people who want to get safely around the big rigs out back, we all have a right to do that . If you want to dawdle along, as long as you pull over to let people around you that fine, if you don't then you are a nuisance. Just enjoy your cucumber sandwiches and grey earl tea , get off thids forum, join the "who cares forum" and let us intelligent 4wdrivers carry on.

As I heard on Dukes of Hazard.............
"Go bo GO"

Thank you gdm_pps. At last someone has worked out how easy it is to pass a slower moving vehicle IN THE BUSH. The cowboys who rarely -if ever - leave the bitumen will never understand that if they want to enjoy the scenery in this country are quite aghast that some 4X4 drivers are those who travel for pleasure.
It is far easier to pass a slower moving vehicle than one exceeding the speed limit. If a vehicle is moving as fast as Benny claims it will take (ummm how long and how far?) to pass. I do not drive as fast as you Benny & co, because I am interested in seeing Australia not seeing how fast I can do it.
I had a mate who boasted that he went around Australia in three (3) weeks. I think that most of the time he only saw the white line down the middle of the road!!!!

What’s to read, you have made yourself clear from the start, with your first post.


Mate you really are a Tool.

What is it assumption is the mother of all F up’s.

You got one thing right, yes the Old man is a sergeant, everything else is chit and shows you have no real ammunition to shut me down so you try talking down to me.

So let’s clear a few things up

A, The old man hasn’t been Traffic for some time and so doesn’t see car crashes.

B. He is Plain clothes and mostly rides a desk these days and spent most of his career dealing with Major crime and Liquor and Gaming, Fun stuff like dealing with Bikies and dead bodies and all that fun Chit, Nothing like being a 12 year old kid and see ya dad walk in the door at 10pm after a Bust to change his shirt as it’s coved in somebody else’s Blood, then head back out agene.

C. I was taught to drive by the old boy as well as a Ex race car driver and truck driver so mate I think I am plenty competent behind the wheel, done 200,000km since I have had my license and surprise I am still hear and I don’t putt around at 85km/h on a empty hwy cause I am too afraid of the “What if factor”.

If I see some clown in a RR out on the hwy doing 85km/h in a 110zone I know it will be you and I will be sure to give you the one finger solute as I go by.

gday brian,

although i dont agree with some of what you say,at least your man enough to put your full name up and not hide behind a screen name. gotta give you credit for that.

cheers dave

Thank you Dave for your kind remarks.
I came to this site attracted by the name "exploreoz". I had no need to choose a sobrequet as all I was looking for was some informantion on some of the places I intend to visit beginning with the condition of the road from Wurrilla to Kinggoonya.
I was amazed that so many people here write about the problems they have with vehicles, whereas if they went to a competant mechanic in the first place the supposed problems would not exist.
Daily I read of vehicles "leaving the road" at high speed killing drivers passengers and sometimes other innocent people.
Another thing is those who run down out fauna and do not have the decency to put the poor animals out of their misery.
Some persons merely fail to think.
Exploder comments on his father. If you add up the possiblities put forward by him about his "Old Man" you will find that said father has to be the oldest cop in Australia.
Having said that, there are many interesting submissions in this forum and I still read it almost every day.
To others who may read this post look up the State Library in Western Australia. Type in my name and see how many times it comes up and the subjects
Once again thanks Dave and I hope to eet up with you down the track and buy you a beer.

Thank you Dave for your kind remarks.
I came to this site attracted by the name "exploreoz". I had no need to choose a sobrequet as all I was looking for was some informantion on some of the places I intend to visit beginning with the condition of the road from Wurrilla to Kinggoonya.
I was amazed that so many people here write about the problems they have with vehicles, whereas if they went to a competant mechanic in the first place the supposed problems would not exist.
Daily I read of vehicles "leaving the road" at high speed killing drivers passengers and sometimes other innocent people.
Another thing is those who run down out fauna and do not have the decency to put the poor animals out of their misery.
Some persons merely fail to think.
Exploder comments on his father. If you add up the possiblities put forward by him about his "Old Man" you will find that said father has to be the oldest cop in Australia.
Having said that, there are many interesting submissions in this forum and I still read it almost every day.
To others who may read this post look up the State Library in Western Australia. Type in my name and see how many times it comes up and the subjects
Once again thanks Dave and I hope to meet up with you down the track and buy you a beer.

Thank you Dave for your kind remarks.
I came to this site attracted by the name "exploreoz". I had no need to choose a sobrequet as all I was looking for was some informantion on some of the places I intend to visit beginning with the condition of the road from Wurrilla to Kinggoonya.
I was amazed that so many people here write about the problems they have with vehicles, whereas if they went to a competant mechanic in the first place the supposed problems would not exist.
Daily I read of vehicles "leaving the road" at high speed killing drivers passengers and sometimes other innocent people.
Another thing is those who run down out fauna and do not have the decency to put the poor animals out of their misery.
Some persons merely fail to think.
Exploder comments on his father. If you add up the possiblities put forward by him about his "Old Man" you will find that said father has to be the oldest cop in Australia.
Having said that, there are many interesting submissions in this forum and I still read it almost every day.
To others who may read this post look up the State Library in Western Australia. Type in my name and see how many times it comes up and the subjects
Once again thanks Dave and I hope to meet up with you down the track and buy you a beer.

What are you on about , mate where do you pull you comment from.

i will finish this with

Exploder,
The early post by you indicated that your Daddy had been pulling bodies from smashes for many years. Now you say he has not. Which is right?
Now you say he is "Plain clothes" involved in major crime.
You said he was a truck driver and a race car driver. If he was a truck driver he needed to be over 21 to get a license. Presumably he drove race cars for a living but for whom you do not say. (Mercedes or Ferrarri?)
By thoses two statements you indicate he was over 25 before he joined "the Job" add his 35 years service a policeman and you come up with 60 years of age. Retirement comes at that age, so there is no way he is dealing with "Bikies".
I suggest you have a lay down and a Bex.
Now if you do not respond to this I will be happy not to have to reply to your rubbish and expose you for what you are.

No I said

“The old man has been a cop for over 35 years and has seen more dead body's and car crashes than I would care to see”

I never said they were all from car crashes.

“I was taught to drive by the old boy as well as an Ex race car driver and truck driver”

That’s right, read it. I was taught to drive by
1. The old man
2. A Ex race car driver
3. A Truck driver

The “as well” is the Key word hear indicating I was taught by the old man and 3 other people that were not him. Also spent time driving with other family members when I was a Lerner but there is no point listing everybody now is there.

Now granted I am probably not as smart as you like to think you are, but one thing I am not is a BS artist, which at the moment is what you are dribbling allot of.

LOL Mate as far as popularity on hear goes I am not anybody’s favourite when I have a opinion about something, But one thing I think most people on hear know is I don’t dribble rubbish.

Now get of you High Horse and do what you originally said you were going to do, STOP POSTING.

This has been enjoyable just when EO slows down we get another one come along who want’s to paly, but it’s time to get back to 4WDing and Camping this is growing tiresome.

I did all the fitting myself. I have EGT and Boost gauges and all is within limits. Runs 18 psi boost and never hits over 550 on the EGT.

Well - then you have been back to the turbo and exhaust guy!
I'm not mechanical so please excuse this question if it's totally stupid - isn't 18psi boost rather high. All the stuff I've seen relating to turbos refers to 9 or so?
Exhaust blockage?

18psi Boost on a 4.2tdi is very high.......I generally only hear guy's winding boost up to a max of around 14psi as too much boost can reduce the life of your donk. Interesting that temps are still low? 18psi is about what the 3ltr runs, never heard that in a 4.2, wow.....

What about the small gauze filter in the top of the injector pump (under the banjo bolt). That can get crudded-up too and will cause dramas......

Good luck

Roachie

Im with Roachie, the tiny gauze filter in the top of the injector pump is a real catch, bet nissan dealers have made millions charging heaps to just clean them out!

As for the 85kph nutter further up the post, well what can I say, obviously he doesnt run the open road for a living, travelling at 85 would mean 2-3 less jobs for the week, which means I wouldnt be able to afford a 4wd or holidays!!!

Cheers Pesty

hmmm.....i know....but what??? bugger!! it's got me worried. Must be a block somewhere or something....all filters are new, only servied like i said 500k's ago, and i always do it every 5000.
could my roofrack cause that much drag???
Could my 285/75/16's make that much difference??

Hey Wayne-o

My 4 1hz non turbo hit 130 and if pushed do 140, so if you have a turbo, one would say something is wrong.

I took my roof racks off and the only difference was fuel consumption, the larger tyres would put your speedo out a little as well, I'm not sure which way though.

Cheers Steve.

Hi Guys,

Bigger tyres....speedo reads under actual speed. Wayne, you are probably in the vicinity of 6-10kph under on your speedo with those tyres..ie: real speed 110, speedo says 100 or 104 (about). Roofracks will definately make a diff to acceleration but little effect on top speed (maybe a few k's less but not 20kph).

Having said that you should have no drama's getting to 150 very quickly with your setup, bit slower to 160 then forget the rest as it won't happen LOL!! Plenty of good suggestions re pump timing and gauze filter in the pump.

Let us know how you get on.
Regards, Trevor.

PS No mechanic this end so I have to rely on listening to what mechanics have said regarding my upgrades and problems along the way.

under load with the boat, approx 2t, up hill the egt climbs quick ly but i was under the understanding that 550 was the max for the patrol...??? is this not the case. The pump is all the way out at the moment, meaning fuel delivery screw. i had wound it in, but there wasnt much change in top end. Should i wind it in, and further you think.... i can moniter EGT's anyway, so i wont hurt the donk!

Wayne-o
the maximum upper limit for durability is about 700 - 720.
Under load you should see temps in the 600's.
My impression from your description of the problem is that your engine is not getting sufficient fuel, as indicated by the relatively lower EGT.
Your increased diameter exhaust will enable a lower EGT due to relatively better gas flow, but you should still be able to generate peaks above 550 under load and from what you are saying this does not appear to occur. The energy lost to heat is low and that means fuel delivery is not sufficient. I would forget changing the set point screw for the moment and look at fuel pressure and volume flow.
Some of the other posts here are suggesting you go through the system and check each component. Once you've done that you may find some answers.

Graeme, thanks for that info, sounds like you really know what your talking about.
I have booked it in for a dyno run.

Wayne, I assume your EGT is measured BEFORE the turbo. If not, then 550 is as high as I would dare go. There is probably around 200 - 200 degress across the turbo.
Cheers
Gerry

Wayne,
GerryP is on the money. I have been looking into turbos for my 1hz. I fitted an EGT pre turbo t oinstall the motor and routinely se tems in the 600-700 mark. My reading has been that post turbo temps should not exceed 500.
As part of the turbo install investigations I have been told that I need a fuel pump re-calibration on a dyno using the EGT and a boost gauge. Apparenlty changes to the induction require a re-timing of the fuel pump.
Seems you have decided on a trip to the dyno, be interested to hear the results.
Paul.

This man is onto the problem, undo the banjo pull out the spring and filter have a good look at it, blow it out and see how it goes.

Some do have them some dont.

Oh bugga.....I should've read down this far into the post before posting my response a few minutes ago....... hahahaha

your thinking a timing problem??? hmm....would have thought there would have been other simptoms if this was the case, not to discount, but i may have to check it......btw, is it a cas of checking belt alighnment??? or is it an electronic thingy???

The timing on my Patrol out of factory (new) was .55 and should have been .74 +/- .02. I had a diesel specialist check this and adjusted the fuel pump accordingly (didn't touch boostas it was between 9-10psi). Once this was done it was like driving a different truck. If this has never been done then it pay's to check as Nissan's are renounded for the timing to be incorrect......I would take it to somebody who knows what they are doing, ie diesel specialist......

you bet me to it
i was going to say pump timing there not real good at the nissan factory
did a gu last week 40000k was half a mm out
cheers

Half a mm, bleep thats heaps. Must have been running like a dog.....

its at 87000km, not even a tiny bit of smoke though....even under full load!

Great Post Wayne-o
Thoroughly entertaining. Just goes to show how this good this forum is, the number of posts offering sensible suggestions. And the fact that if some pompous upstart gets on the soapbox, boom....
Whatever happened to "if you dont have anything nice / sensible / constructive to say, shut the *&%* up.
Hope you get it sorted mate.
Mike

Simple answer,
Its my hobby, and have nothing better to spend my money on...
I love it.....
my truck is mine, and i like it unique, and better than, well as long as its bigger, louder and got more lights than my brothers, which is hard to keep up with, im happy....
Wayne-o

Hey Wayne-o,
Mate you're talking to a brick wall there mate......some of us can't bear to leave a vehicle standard......others just don't get it and think that blokes like you and me are mad. Poor sods just ain't got no idea!!!!!!!!! hahaha
Hope you can sus it out real soon mate, but timing and possibly the little gauze filter are my 2 best bets.

Cheers mate

Roachie

What about injectors??? We had a GQ 4.2 that by 200k was losing power. didnt get them done before selling it though (due to $600 + price tag) Worth considering?

Brad

It was non turbo by the way.

ROTFLMAO.....................

HAHAHHAAHAHAHHAHAHAHAHA

No more needs to be said! Good one Big Mike!

there was a slight scraping noise, sounded a bit like british engineering......will check

Big Mike, you get my vote for "Reply of the month"!! Good one!

thanks matt.
it is factory intercooled TD, the mod is an upgrade, stage two, compressor and turbine,
They are good for 30psi in the comp trucks, so 18 is fine.
not too sure what a boost compensator is??? can you let me know.
No MAF sensor or EGT that i know about on the TD-6.
chhers
Wayne-o

Ahh no worries...some reason I had the impression you fitted a turbo to a NA 4.2....

Still think the boost is too high but that just my opinion..... Cummins truck motors just run 30 PSI boost with advanced engine management(600HP Signature)and there is nothing advanced about your old 4.2.

Being factory it will have boost compensation...ie it will only allow full fuel if the boost pressure is there. If it was NA then there would not be one fitted.

I still believe it may be due to the turbo...you have sacrificed the top end for your bottom end torque....Similar to fitting a smaller turbo gives more bottom end and larger sacarafices bottom end and gives more top end.(VERY general description)

Goodluck.

Matt.

Still think most will be explained when you see a diesel tuner..

Your boost compensator will be giving you full fuel when you boost hits about 11psi(should be about max before mods) now you have 30psi... So after you hit 11 then is no more increase in fuel delivery. Now you can adjust this at the delivery screw but then you will over fuel at lower settings.

You will prob need a mixture of both adjustments to make the most of your new boost range. Prob explains why you drop off at the top end of power and not torque.

Matt.

Sorry mate just re-read this loooooong thread and see its 18 not 30...dunno where I got that from. Thats not too high!! but still may need adjustment about to make the most of your mods.

Matt.

Nice try, Beatit, but not a patch on Big Mike's "check for 85km/h RRs stuck under the sump guard" - Classic!