XSeries-forum

The garage I use is brill, and would never fail it on emissions, does any warning lights flash up if removed completely?

On a standard car the best gains you are going to get is from a remap

For the amount of money you are going to spend on removing the cats against how much more power extra you will see on a standard car is not worth it

Hi flow air filters again are not worth fitting as the standard are great

[quote="jason@bwchiptune"]
On a standard car the best gains you are going to get is from a remap

For the amount of money you are going to spend on removing the cats against how much more power extra you will see on a standard car is not worth it

Hi flow air filters again are not worth fitting as the standard are great
[/quote]

Cheers Jas, I can get the cats/pre cat removed and new pipe in for under £100, so not much, then try to enlarge the intake pipes for slightly more air, then come and see you for a remap and gearbox update.

As a rule that I have always been told and it has been discussed with tuners on alot of forums, is that each cat removal gives approx 5-8bhp, now I dont know if this is true or that it only applies to petrol, but when I removed them off my previous petrol cars it made a difference, not alot but a bit. And it all adds up in the end.

[quote="Jamee"]
[quote="jason@bwchiptune"]
On a standard car the best gains you are going to get is from a remap

For the amount of money you are going to spend on removing the cats against how much more power extra you will see on a standard car is not worth it

Hi flow air filters again are not worth fitting as the standard are great
[/quote]

Cheers Jas, I can get the cats/pre cat removed and new pipe in for under £100, so not much, then try to enlarge the intake pipes for slightly more air, then come and see you for a remap and gearbox update.

As a rule that I have always been told and it has been discussed with tuners on alot of forums, is that each cat removal gives approx 5-8bhp, now I dont know if this is true or that it only applies to petrol, but when I removed them off my previous petrol cars it made a difference, not alot but a bit. And it all adds up in the end.
[/quote]

It all helps of course it does

As you say if you do each of these bits then go to Jason or anybody else that can do a custom map with these bits in situ already that is of course the best method. If you want to get carried away you could look at changing the inter cooler too. 

Have been looking at this, choosing one is the easy part, but reading it is a bit tricky to fit some of them, going to have to take some measurements of the spaces I have to play with underneath and the pipework etc.

[quote="Jamee"]
Have been looking at this, choosing one is the easy part, but reading it is a bit tricky to fit some of them, going to have to take some measurements of the spaces I have to play with underneath and the pipework etc.
[/quote]

Somebody on one of the other blogs put an RS500 cossie one on his 535d.

My lotus has a bigger one too and that give between 8-10 Bhp. Shame they put it in such a stupid place in those though!

You'd have been better buying a 4.8 if you want a lot of horses, instead of buying a diesel  bungalow on wheels )

[quote="535dboy"]
[quote="Jamee"]
Have been looking at this, choosing one is the easy part, but reading it is a bit tricky to fit some of them, going to have to take some measurements of the spaces I have to play with underneath and the pipework etc.
[/quote]

Somebody on one of the other blogs put an RS500 cossie one on his 535d.

My lotus has a bigger one too and that give between 8-10 Bhp. Shame they put it in such a stupid place in those though!
[/quote]

http://www.bmw535d.co.uk/id11.html

that is an interesting read, will look into the i/c, looks pretty straight forward.

Here's a 2008 335d which made 390bhp 625ft after we removed the Dpf fitted methanol injection then spent a few days tuning on the dyno


This is a 2005 535d that was 1 remapped by another tuner to start with

The customer asked if we could make the car any faster after tuning a few of his other cars and family cars

So i flashed the car back to standard with our autologic
We tuned it our way and got more torque from it throughout the rev range
His comment was it was smoother,pulled stronger response was improved
After a few months he asked if we could get any more and handed over the keys and said it has to be alot faster
We removed the Dpf and spent 2 days mapping it as it lost the lower end torque after removal
we had the torque well over 570ft but I dropped it down to under 550ft 360bhp as it was an old car with milage

Now guys this one is closer the the x5 3.0d engine

We did this the other week
E46 3.0d 204bhp version manual
Hybrid turbo
Intercooler
Egr by pass pipe
De cat and full exhaust system
Updated clutch

Made 299bhp and over 500ft

299BHP...........How much cash ?

It all depends on where you buy your parts from

Example the turbo was new from bmw then sent away to had it modded to start with

Tuning the car along was over 600

I don't think I'm going to let Mrs X5Sport read this thread!!  I can just imagine the glow in her eyes when she realises it's the same engine in her E46 Vert!! :'(

Richard

Did you ever de cat in the end? I think my cat is clogged up, my 3.0d is sluggish on pick up and when you put your foot down the cat stinks