Increase boost, IP adjustment and wastegate spacing.

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So, on the ExPo forum, a Pajero owner recommended a tweak to the IP and wastegate for more power. I'm not in the habit of randomly screwing with my motor so I thought I would post his suggestion here and see if anyone has ever heard of doing this? Sounds like it would be easier on a Paj maybe...
Original thread http://www.expeditionportal.com/forum/t ... ead!/page2

" Originally Posted by 96Delica
Hmmm please elaborate? I've had my IP rebuilt, what do you have to do to the wastegate? Did you turn up the boost as well?

When you space out the wastegate you're essentially turning up the boost. What you will need is 2 washers that are about 2-3mm thick. Put these washers under the wastegate bracket so it spaces it out by the thickness of the washers.

Then to tweak your injector pump you take the intercooler off,take off the coolant pipe on the top of the top of the pump and clamp it with a vice grip. Then you will see 4 10mm (I think) bolts,take out the rear ones first,then the front ones,be careful when taking out the front ones as there is some thick spacers which will fall out is you aren't careful. Remember which order the brackets on the top of the pump are on too.

Then carefully lift the cover. You will see a round rubber diaphragm with a "0" on it,take note of where this is and pull it out. You will see a plastic spacer on the shaft. Take that out and file about 1.5 - 2 mm off it.
Then divert your attention to the pump its self. Inside you will see a star wheel. Turn this 90 degrees clockwise,make a mark on it first so you can see how much you are turning it.

Then put it all back together. Put the diaphragm and shaft on 90 degrees clockwise to how it was originally,and assemble everything up again.

It made it no more thirsty. Although after I did it the first tank was shockingly bad as I was flooring it everywhere! What the mod does it increase your fuel pressure under boost and makes it very torquey!"

[Rattlenbang]

I think that any time you increase boost pressure you are stressing the motor more and in the end shortening it's life. Countless hours have been spent by engineers designing these engines for a compromise between power and longevity, with the emphasis much more towards the latter. These two factors are somewhat mutually exclusive; you can increase power dramatically, but it shortens life, or dial back how hard the engine is working and it lasts longer. Which is why engines designed for race applications are tremendously powerful, but need constant attention. In your case, increasing the power output of the engine slides the marker further from the longevity pole. If that's a trade-off you're happy with, then go for it.

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I couldn't agree more. I'm pretty satisfied with how my van performs and I don't really have any plans to mess with it for now, i was posting this more for discussions sake. If I talk to someone with 500k on their engine with no overhauls an increased boost, then I would consider it.

[Rattlenbang]

It is an interesting topic, but I suspect 500k is asking too much from these engines. While diesels have an almost mythical reputation for longevity, related to what I said above, I think that comes from the older technology NA diesels that were overpowered or overtorqued for their application. I recall the old Mercedes 5 cylinder engine had been known to get over a million miles, while, for example, you wouldn't usually get half that with the anemic little VW 1.6 litre diesels they put in the golfs, jettas and rabbits, although the technology was very similar. At 40 hp, the VWs just had to work too hard to have the longevity possible of a beefy diesel. And as we know, our poor MItsu engines have their work cut out for them hauling these fat, heavy rigs of ours along. From what I've heard out there, the current incarnations of German diesels are expected to have even less lifespan due to the complex and exact technologies required for emissions, and you simply cannot delete these components once they wear out and are NLA.

[Firesong]

I had talked to ManitobaDeli about the IP Adjustment.
It's simply a way of setting the IP to put more fuel in without
adjusting the IP Pressure (which some people do as well)

Usually the IP pressure gets adjusted when IP's are a little older,
not as effiencient and it can get the required pressure back up to snuff.

The starwheel adjustment dumps more fuel or less depending on
which way you turn it. Less wasted fuel on acceleration (less black cloud
behind the vehicle) more fuel equals...

I like my vehicle where it's at. Accelerate at fuel (if ever needed) and just
a bit of black out the back... just a little tiny bit. Nothing to annoy anyone.
You see those big cummins dumping the smoke out as they accelerate...
I hate that crap.

FS

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I had talked to ManitobaDeli about the IP Adjustment.
It's simply a way of setting the IP to put more fuel in without
adjusting the IP Pressure (which some people do as well)

Usually the IP pressure gets adjusted when IP's are a little older,
not as effiencient and it can get the required pressure back up to snuff.

The starwheel adjustment dumps more fuel or less depending on
which way you turn it. Less wasted fuel on acceleration (less black cloud
behind the vehicle) more fuel equals...

I like my vehicle where it's at. Accelerate at fuel (if ever needed) and just
a bit of black out the back... just a little tiny bit. Nothing to annoy anyone.
You see those big cummins dumping the smoke out as they accelerate...
I hate that crap.

FS

Can't expect 500k eh? Hmmmm... Well, I'm going to keep my expectations high!! I think that as long as you're not flooring it all the time, and living in the flatlands, it shouldn't be too much to ask. Especially if you're up your maintenance. Does that make sense? Or is it time top start thinking about a rebuild if you have 400k on your engine?

James, I couldn't agree more about that black smoke, that's just wasted fuel isn't it? My van has enough power for me. It has enough pull from a stop for me not to feel like I'm driving a slug. Getting onto the highway though, I use the whole length of the merge lane, I don't like to push it when I'm getting up to highway speed. I didn't know that an IP adjustment was even an option. After the cost of the seal replacement there is no way I'm paying that again just to get a little black smoke out the back. I don't even think I have any smoke now, if I do, it's not enough to see in my mirrors anyways.

If i want speed and power, I'll save up and get a JDM Skyline

[Rattlenbang]

I had talked to ManitobaDeli about the IP Adjustment.
It's simply a way of setting the IP to put more fuel in without
adjusting the IP Pressure (which some people do as well)

Usually the IP pressure gets adjusted when IP's are a little older,
not as effiencient and it can get the required pressure back up to snuff.

The starwheel adjustment dumps more fuel or less depending on
which way you turn it. Less wasted fuel on acceleration (less black cloud
behind the vehicle) more fuel equals...

I like my vehicle where it's at. Accelerate at fuel (if ever needed) and just
a bit of black out the back... just a little tiny bit. Nothing to annoy anyone.
You see those big cummins dumping the smoke out as they accelerate...
I hate that crap.

FS

I would be interested to know how that adjustment is made. There's a fair bit of stuff I've found on the end in terms of rebuilding these Bosch pump (knockoffs) but not on adjustment. Mine is way too rich on high throttle, and if I have to put the pedal down hard, it's like an oil well fire back there. The EGR is blanked, the turbo has been rebuilt, and the air cleaner is new so it's not an airflow problem.

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I would be interested to know how that adjustment is made. There's a fair bit of stuff I've found on the end in terms of rebuilding these Bosch pump (knockoffs) but not on adjustment. Mine is way too rich on high throttle, and if I have to put the pedal down hard, it's like an oil well fire back there. The EGR is blanked, the turbo has been rebuilt, and the air cleaner is new so it's not an airflow problem.

How can you tell if it needs adjustment? Just whether you're blowing smoke?

[Rattlenbang]

Well, all diesels will blow smoke when you first stomp on it, but mine's excessive so I know its getting too much fuel.

[Firesong]

What I understood was the starwheel adjusts the amount being dumped in
under turbo. It doesn't change the pressure in general. I had changed the
pressure on my L300 until I got the IP rebuilt (the screw on the back of the IP Pump).

With the rebuild it was a little sooty when you stomp/turbo kicks in. It needed the
star turned back a turn. Sold it before I could do that.

FS

[Rattlenbang]

Well, after looking at the bosch manual, I don't see a "starwheel". There is a richness adjustment, though that adjusts fuel cross all ranges not just at wo throttle.

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What I'm getting from this thread is that I have approximately 300,00km to get everything ready for

[Rattlenbang]

Yeah, back when I was 17 I also used to like spinning my wheels in loose gravel hoping someone notices me and thinks I'm amazing

[mac_stang]

It is an interesting topic, but I suspect 500k is asking too much from these engines. While diesels have an almost mythical reputation for longevity, related to what I said above, I think that comes from the older technology NA diesels that were overpowered or overtorqued for their application. I recall the old Mercedes 5 cylinder engine had been known to get over a million miles, while, for example, you wouldn't usually get half that with the anemic little VW 1.6 litre diesels they put in the golfs, jettas and rabbits, although the technology was very similar. At 40 hp, the VWs just had to work too hard to have the longevity possible of a beefy diesel. And as we know, our poor MItsu engines have their work cut out for them hauling these fat, heavy rigs of ours along. From what I've heard out there, the current incarnations of German diesels are expected to have even less lifespan due to the complex and exact technologies required for emissions, and you simply cannot delete these components once they wear out and are NLA.

I don't know, take a look on craigslist, it's hard to find a VW tdi that doesn't have 300k on it...my 02' Jetta had 265k on her when I sold it(mileage got a little better with every tank over the 8 years too). I had no lack of power either. Ran great as well.

[Rattlenbang]

300k is getting up there, and yet those old school diesels can run to a million. I've had a couple of 1.6 and 1.6TD and both needed rebuilds before 400k, which is poor for a diesel. I've had Japanese gassers run more miles.
I would stay far away from a later model diesel with 300K unless it was a very good deal.