The Mitsubishi Pajero Owners Club®

[fizz]

having read the ongoing egr discussions,i decided to venture under my own bonnet,and blank off the offending valve.whilst under there,i noticed that my kickdown cable had undone and was hanging loose on the bracket.this would explain the poor gearchange when trying to get the slug moving.
now to the meat of the matter.
on my `91 2.5lwb there is a pipe which branches off the intercooler inlet side,and goes into a tube which runs across the front of the intercooler.
it doesn`t appear to do anything.i guess it must be some sort of balance pipe or expansion chamber.surely a straight pipe,bypassing this would aid performance again.if the pipe is just there to relieve pressure,then the dump valve will never need to open,whereas provided the valve is in working order,it will blow off if you get excited with the throttle,once the pipe is bypassed.
does anyone agree,or have any views on this,or am i talking b*££*%s

[Google]

[stumpey]

The pipe you are talking about is the resonator it helps keep the induction noise down on your engine. If you drive a MK1 it does not have a resonator and you can hear the induction noise in the cab especially when the turbo is pushing hard after 2000 rpm.
Some people remove the resonator to smooth the flow but you do get an increase in noise.

Steve

[DTP]

Mitsubishi refer to said 'Pipe' on the intercooler as a Blancher pipe. I would tend to agree with Stumpey's point on both reduced noise and added value to power if you take out that T-peice for a straight replacement.

If you want some thoughts on modifications to these engines, I have a few tricks up my sleeve - most of the same principles for 'blown' (ie forced induction) tuning for petrol engines is applicable to Diesel tuning, and it's so simple, it's daft!! The other bonus is that a lot of mods shouldn't neccesarily effect your insurance premium, assuming you're willing to tell them! My other car is a 150bhp+ 1275 mini turbo (standard is 95 bhp). I haven't spent a fortune on 'hot' parts, I've simply increased the efficiency of the turbo induction process!!! It's a handful, I can tell you....

If you want me to add some pointers on Diesel tuning, just say and I'll jot away! And I can also point you in the direction of a Business I know who can supply Diesel tuning parts, if you are prepared to make a budget for it.

Dan

[stumpey]

Resonators How and Why

Everything in your car is there for a reason and not there just to reduce noise and rob you of power. The most often removed and least understood "mystery piece" found on a motor would have to be the humble inlet resonator. Normally formed from unattractive black plastic and bulbous in design, the inlet offends the ignorant for a couple of reasons. firstly the shape and size of the resonator makes people believe that its just a tacked on afterthought to make your engine bay look fuller than it really is. The second myth is that the inlet resonator is there to quite your engine by reducing induction roar. In fact, the inlet resonator is a carefully designed part of the induction system, matched to the particular characteristics of the engine it is mated to.

They come is several different designs, such as side branched, inline (inside the induction tubing) and mounted top and bottom. Rather than affecting the peak power output, they can have a dramatic effect on the smoothness of power delivery and bottom end torque of the engine. This is why fitting an aftermarket inlet system can often make your car perform worse than it did originally.

Resonators allow the flow of air to be increased. They do this by literally creating a mini atmosphere where a reserve of air can be stored for the engine to use!(virtually making the inlet pipe shorter) But because these resonators work on acoustics it needs to be tuned to the engine! ( they only work on NORMAL ASPIRATED engines because these engines need to suck the air that they need.) So if you have a Turbo or other forced induction engine you can dump the resonator.


Steve

[allan]

[stumpey]

Nope just my anorak sleeve

Steve

[fizz]

cheers guys. as ever very enlightening.thanks to stumpey for clearing up what it is and what its doing there,and thanks dtp for the offer of more tips.
i`m not too familiar with diesels or turbo`s but i have been preparing road and race motorcycles for many years,for myself and friends.
i`m not looking to turn my paj into some fire breathing beast,but i hate the thought of driving or riding anything that isn`t sorted.i.e running efficiently.hence my tinkering and quest for knowledge.

[johndps]

chip it
TD's benefit enormously from after market chips

[Philco]

John.....you cant chip a '91 engine as there is no electronic management system..........you can only play with the pump and turbo

[johndps]

oops