diesel tuning box

[fireman01]

Home » Diesel Powered Tuning this is the link to the company i used for my tuning box £289+vat fitted at their local supplier,the car is totally different to drive(should have come from the factory like this) well worth the money in my opinion,check it out and let me know what you think</p>

[McMuffin]

Thanks for the link, the claims they make gave me a real good laugh.

As I mentioned in a Dooper thread, diesel engines are often easily tuneable as they normally have a Torque Limitation Map.
This map is there to protect the drivetrain (gear box, driveshafts etc) or even the engine it's self.
More Power and Torque means more stress on all the components that power and torque passes through.
However, on the flip side, the manufactures set the torque limit so that these components should last approx 100,000 miles or some similar target. So can you live with it if they do a few less, probably.

The Torque limitation map is one of (there are a lot of others) the maps that limit the final injected fuel quantity.
An increase in the quantity's in this map or an increase to the final injected quantity can in some cases have a significant effect on output torque. Good I hear you cry, and it is, if you are prepared for the side effects.

As I said, increases in Power and Torque increase the stress on the components they travel through. As this Power and Torque increase is not the manufactures design intent IT WILL invalidate the warranty IF FOUND and if the item failed is one that transmits this power and torque.
Of course, this type of change can be difficult to find, especially the ones that can be removed before going to the dealer.

Also, this power and torque increase is achieved by increasing injected fuel.
If you pump more fuel in then of course this will increase the fuel consumption and therefore also the emissions.

The sites claim that as you have more torque you will drive in a higher gear and therefore reduce consuption and emissions is very missleading at best.
Manufactures do not invest millions of pounds into developing vehicles and then leave out something that would give so much benefit without any side effect as this site seems to claim.

As the old saying goes, "you don't get something for nothing"

I am not saying don't do it, if you want more power and torque and are prepared for the side effects fair play.

I hope this post is seen as constructive, that is how it is intended.

[Yellow/Black OneD]

Did BMW alter the components when they 'upped' the bhp of the OneD to 88 from 75? Sorry, can't remember what the new torque figure was, but it must have been something in the order of 150lb/ft, up from 133lb/ft?

[McMuffin]

Quote: Originally Posted by Yellow/Black OneD (original)

Did BMW alter the components when they 'upped' the bhp of the OneD to 88 from 75? Sorry, can't remember what the new torque figure was, but it must have been something in the order of 150lb/ft, up from 133lb/ft?

Can't answer that, BMW is not the manufacture I work for.

I can tell you manufactures know what their components are designed to handle and nearly always confirm it with physical durability testing.

Don't get me wrong, manufactures normally like to have a good safety margin e.g. the warranty may be 60,000 miles but they aim for a durability of 100,000 miles.
So an upgrade may eat into that safety margin but that is something most people could live with I would imagine.

My point is these things are a balance one thing offset against another.
The problem with the sales guff at the end of the web link is it tells you not only are there no side effects but the things that may be the negative side effects are actually improved as well.

You don't need any technical knowledge to know something that sounds to good to be true usually isn't!

[fireman01]

took onboard everything you said m8,my car is out of warranty anyway,there may be some more strain on parts like you say,but i think the pros far outways the cons,i know manufacturers spend millions on research,but the way they expect it to be driven and the way that it is driven can be miles apart,take my car,gf stays at the bottom of a culdesac,without the box need to hold the car right up the revs in first,fast change to 2nd,gets to the top of the hill(just )with the box its climbing the hill in 3rd without the need to over rev in 1st,so in my opinion my car isn't under as much strain as it would be without the box. thats just my take on it though,i also have 19" wheels that put extra strain on the car,but i put up with it because i like the look, each to their own i suppose!

[McMuffin]

Glad you are happy with it, that's cool.

I am not against tuning, if you know the pro's and con's and are happy with them go for it.

It's the sales guff saying it's all pro's and no con's and the possibility that someone may go into blinded by the sales guff that worries me.

You weighed up the pro's and con's then went with what's best for you, that's great, enjoy