[team marston racing]

i am thinking off fitting one off these psi power boxs i have been told they better than i chip and u can remove them when u sell the car on anybody had one before thanks

 

[pegasus]

My dad has one fitted, i dont know if its better than a chip but it certainly makes a diffrence to his car.

 

[team marston racing]

could anybody help with this post i am unsure what to do if the psi works and is worth buying or not and where is the best place to get one from thanks

 

[996TURBO]

Those power boxes are bull****, they all work on same principles. There's few electronics in there. Basically there's 10 GBP max of components.

All the boxes are the same for all vehicles, some even say they're universal.

Those gives more fuel pressure, more fumes, more power.
Of course you'll get more power but not with the safest method for your engine and transmission because it's not bespoke for your vehicle.

A box is cheaper than a rechip but a decent rechipping will give you power but with safety and reliability.

 

[Cornishman]

Those power boxes are bull****, they all work on same principles. There's few electronics in there. Basically there's 10 GBP max of components.

All the boxes are the same for all vehicles, some even say they're universal.

Those gives more fuel pressure, more fumes, more power.
Of course you'll get more power but not with the safest method for your engine and transmission because it's not bespoke for your vehicle.

A box is cheaper than a rechip but a decent rechipping will give you power but with safety and reliability.

In my personal experience, you're talking out of your arse.
I had the PSI powerchip fitted to my Discovery 2 TD5 and Shogun 3.2 DiD, it gave much more power on both vehicles, so much so, that when towing a bobcat with the Disco, I could climb local hills in a higher gear and still accelerate.
This came with lower emissions, proved with an MOT station exhaust analyser, as I was concerned with emissions. Unbelievably, it did give greater fuel economy on a long run.
Sounds too good to be true, I know. But the facts are, that's what it gave.
They are not universal, you buy a unit to suit your vehicle. Okay, their not tailored to suit the individual engine mapping, but in my case, they did nothing but good :thumb:

 

[996TURBO]

In my personal experience, you're talking out of your Golly Gee Whizz.
I had the PSI powerchip fitted to my Discovery 2 TD5 and Shogun 3.2 DiD, it gave much more power on both vehicles, so much so, that when towing a bobcat with the Disco, I could climb local hills in a higher gear and still accelerate.
This came with lower emissions, proved with an MOT station exhaust analyser, as I was concerned with emissions. Unbelievably, it did give greater fuel economy on a long run.
Sounds too good to be true, I know. But the facts are, that's what it gave.
They are not universal, you buy a unit to suit your vehicle. Okay, their not tailored to suit the individual engine mapping, but in my case, they did nothing but good :thumb:

-More Power. Did i say that the box won't give more power? No of course they will and that'll help you when towing or passing.

-Lower emissions ? i don't know about the MOT procedure of test. Which RPM's. But for sure, i can see the black fumes of boosted Golf TDI and Bimmers over here when the press pedal to the metal (some will say even without any boost there's a black cloud). Let's say that 80 % of boosted diesels over here have a box because it's cheaper, plug and play and removable for French MOT or in case of accident (because insurers do not cover the risk if there's power modifications).

-Fuel economy It's normal to have greater fuel economy for many reasons. 1st : placebo effect, 2nd : you'll have the same power at a lower RPM with a box so it's normal. You could have a better economy with a remapping since you could even ask the rechipp guy to give you better fuel economy on certain types of conditions only. It's fully bespoke to your vehicle and to your driving habits.

-Not universal? Of course you buy a unit to suit your vehicle but the fact is it's exactly the same components in the box with a different setting of the potentiometer and of the leads.

Another fact is that powerbox companies do work by engine type and not by vehicle : when they say Range Rover 2.5BMW, they only have in mind bimmers sedans which have completely different needs in power delivery and driving habits.
Why do they work like that? there's more bimmers than rangies and at their price they can't engineer a setting of the box for the Rangie.

A remap can take into account if your BMW M51 engine has been fitted to a Range Rover 2.5 BMW, if that one is manual or auto, engine wear (10.000 km or 200.000km), reliability expectations of the owner, etc...

For the money a box is excellent but i wouldn't spend more than 50 GBP on one 8) which is 5% of a remap

FYI, i wouldn't go for a remap or a box on the L322 TD6 since all the boosted i've seen wrecked their autobox in less than 60.000 miles.

 

[996TURBO]

Have a look at that :
http://www.superchips.co.uk/roadtest/rrover25dse.pdf
http://www.superchips.co.uk/curves/rr25dse.pdf