TD5 tweaking advice.

MR D. · Nov 29, 2009

I'm very new to Discovery ownership and would like to enhance its performance a little. I'm thinking of doing the work in two stages and I'd be very grateful if you could tell me if I'm heading along the right lines.

First I am looking at letting it breathe so I'm looking at fitting the following-

Decat down pipe.
Replacement center section.
EGR removal.
K&N panel filter.

Secondly I will be getting it all remapped and thats about as far I intend to go.

The questions,

1. Am I changing the right bits, is there anything that I have missed or dont need to do?

2. Will changing the center pipe to a straight through increase the cabin noise to an unacceptable level as Its a family vehicle.

3. Can anyone recommend a supplier of the down pipe and center section.

4.Mapping, can anyone recommend a mapper in or near to South Wales. I have always prefered live road mapping rather than generic performance chips etc. Or is that fully acceptable on this engine.

Many thanks.

zak119 · Nov 29, 2009

i have recently got rid of the egr and replaced the middle silencer with a straight pipe, whilst performance is better it does drone on a bit inside but my motor is a 90 hardtop so yours may be quieter with the carpets and seats

thebiglad · Nov 29, 2009

MR D. said:
I'm very new to Discovery ownership and would like to enhance its performance a little. I'm thinking of doing the work in two stages and I'd be very grateful if you could tell me if I'm heading along the right lines.

First I am looking at letting it breathe so I'm looking at fitting the following-

Decat down pipe.
Replacement center section.
EGR removal.
K&N panel filter.

Secondly I will be getting it all remapped and thats about as far I intend to go.

The questions,

1. Am I changing the right bits, is there anything that I have missed or dont need to do?

2. Will changing the center pipe to a straight through increase the cabin noise to an unacceptable level as Its a family vehicle.

3. Can anyone recommend a supplier of the down pipe and center section.

4.Mapping, can anyone recommend a mapper in or near to South Wales. I have always prefered live road mapping rather than generic performance chips etc. Or is that fully acceptable on this engine.

Many thanks.

1. Generally speaking you are on the right track and your approach ie better breathing is a good one.

2. When I fitted a straight-through centre section on my TDi 300 it did drone a little, but fuel consumption went up but performance didn't. De-cat downpipes however are, imo, a must.

robhew86 · Nov 29, 2009

MR D. said:
First I am looking at letting it breathe so I'm looking at fitting the following-

Decat down pipe.

Are you sure it has a cat....'coz the early TD5's dont have cats...

Rob

Urban Panzer · Nov 29, 2009

Want it remapped, got to TD5alive or Je engineering, after its done, stock up on exhaust manifold studs........and don't bother with the K&N...

Twisted performance do a nice stainless straight thru pipe, its very drony to begin with, but gets a lot better as it "cokes" up.

Jason2 · Nov 30, 2009

robhew86 said:
Are you sure it has a cat....'coz the early TD5's dont have cats...

Rob

Luckily I checked before orderering a de-cat pipe for our late 2000 TD5 cos it dint have one!

MR D. · Nov 30, 2009

thebiglad said:
1. Generally speaking you are on the right track and your approach ie better breathing is a good one.

2. When I fitted a straight-through centre section on my TDi 300 it did drone a little, but fuel consumption went up but performance didn't. De-cat downpipes however are, imo, a must.

Thanks for the reply, I dont want any drone as motorway trips are going to be hard work, how bad is it? should I look at leaving the OE center section in place.

robhew86 said:
Are you sure it has a cat....'coz the early TD5's dont have cats...

Rob

I thought they all had cats so I'll have to check that one. I guess if the down pipe has a cat it will have some sort bulge it it. what should I look for?

Urban Panzer said:
Want it remapped, got to TD5alive or Je engineering, after its done, stock up on exhaust manifold studs........and don't bother with the K&N...

I'll check out 4 alive, why no k&n? No good or is the OE filter ok?

Twisted performance do a nice stainless straight thru pipe, its very drony to begin with, but gets a lot better as it "cokes" up.

I'd like to know how drony they are as if I'm towing it might be a bit much on a long journey.

Thanks for all the info so far everyone keep it coming.

thebiglad · Nov 30, 2009

MR D. said:
Thanks for the reply, I dont want any drone as motorway trips are going to be hard work, how bad is it? should I look at leaving the OE center section in place.

I thought they all had cats so I'll have to check that one. I guess if the down pipe has a cat it will have some sort bulge it it. what should I look for?

I'd like to know how drony they are as if I'm towing it might be a bit much on a long journey.

Thanks for all the info so far everyone keep it coming.

Re the centre pipe replacement, I found it was slightly more noisey but as it didn't improve performance I removed it, the de-cat downpipe however is completely different - big and obvious gains all the way without increase in cabin noise.

MR D. · Dec 2, 2009

looks like I can save some cash as my TD5 already has a decat front pipe

The only sad bit is the fact that I dont have any gain to make in terms of power from that item.
I've decided to change the centre section and see what its like noise wise, the pipe is not a lot to buy and it can be easly changd back if its to loud for me.

So it looks like my shopping list for stage 1 is :-

Centre pipe swap.
EGR removal.
K+N panel filter.

Let the shopping commence.

Thanks for the tip on the Front Decat pipe otherwise I'd of bought one of them.:doh:

TD5 tweaking advice.

MR D.

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zak119

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thebiglad

Well-Known Member

robhew86

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Urban Panzer

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Jason2

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MR D.

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thebiglad

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MR D.

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