Are there any advantages/disadvantages to decat a vrs, ive been told by an MOT tester that it will still pass the emision test without the cat????

Advantages - imagine the exhaust a little like an artery.... Then start to think about mild heart disease symptoms. Always best to clear the slight blockage which is slowing down flow.

And yes, they do pass MOT fine. Mine has passed twice decatted now - last time with flying colours. Tester didn't even know.

Is there any increase in Standard BHP, plan to do the exhaust then a have a long drive down to Jabba for a remap, long way from Cumbria but worth it

It'll be very minor if any at all. Are you looking to replace the whole system or just remove the cat from the existing system?

Chris

Full system, replace with Stainless

I thought the tdi lumps needed a little back pressure to help the turbo in operation, so removing the cat all together was a bad idea on PD 130's.

I could of course be wrong, but it's what I picked up on talking to a few bod's "in the know"

fluff'

A full system might see you slight gains then as the stock one is restrictive, but don't expect a massive change

Chris

The guys over on TDiclub say dont expect big gains if any from a full system even if you go for a straight through system. But it does help to reduce the EGT temps.

I thought the tdi lumps needed a little back pressure to help the turbo in operation' date=' so removing the cat all together was a bad idea on PD 130's.

I could of course be wrong, but it's what I picked up on talking to a few bod's "in the know"

fluff'[/quote']

Over on SCN I read that some back pressure is needed but over on TDIclub they reckon the turbo makes enough back pressure. Still I reckon with a full system you'll get 1-3bhp increase depending on the dyno lottery

My long term plan is a stainless exhaust. no cat, no middle silencer, probably no backbox either. 2.75" pipe from DP to tail.

I've asked this on tdiclub - and apparently enough pressure is generated by the turbo or something, and all the exhaust needs to do is get that gas outta there as efficiently as possible.

My long term plan is a stainless exhaust. no cat' date=' no middle silencer, probably no backbox either. 2.75" pipe from DP to tail.

I've asked this on tdiclub - and apparently enough pressure is generated by the turbo or something, and all the exhaust needs to do is get that gas outta there as efficiently as possible. [/quote']

Not going for that side exit

Jason, when I was a kid we had a JCB with a broken exhaust, wont the fabia sound the same with a straight through pipe ?? i.e. stupidly noisy (in a bad way)

I believe that JCB didn't have turbo? That silences enough

Not sure if it did or not - I was about 8 at the time I use the term JCB loosly too, it was atcually a "CASE"

Loud pipes saves lives

I'm with Phil - amplifying the sound of a diesel engine is not nice! :(

Chris

Still a JCB is fairly musical, have you not heard the JCB song yet?!

Well, as always with me, I'm only thinking of a straight thru stainless pipe to save money on exhaust fittings.

Not going for that side exit, no.

Well, as always with me, I'm only thinking of a straight thru stainless pipe to save money on exhaust fittings.

You could save even more money by leaving the exhaust as it is :P:rofl:

Chris

... Still I reckon with a full system you'll get 1-3bhp increase depending on the dyno lottery

Adding a full Milltek on mine produced a RR gain of 8 bhp. So at over

You could save even more money by leaving the exhaust as it is :P:rofl:

Chris

Love it.

You know Jason though, he has to fiddle with everything. I reckon he will mod the car so much that one day he will take a few steps back and say "oh god I turned it into a micra"

he will take a few steps back and say "oh god I turned it into a micra"

Don't insult the Micra. They're not bad cars now. Mine will be much much worse.

Although being serious the visual side of the car is unlikely to alter at all. I like the wheels, like the suspension, like the small bodywork changes... No more to do,

needs vertical black slats over the FMIC rather than the mesh

Advantages - imagine the exhaust a little like an artery.... Then start to think about mild heart disease symptoms. Always best to clear the slight blockage which is slowing down flow.

And yes' date=' they do pass MOT fine. Mine has passed twice decatted now - last time with flying colours. Tester didn't even know. [/quote']

I agree. The MOT test doesn't test for "emissions" like it does with a petrol engine, it just checks for smoke emission Parts per million (How much smoke).

needs vertical black slats over the FMIC rather than the mesh

I agree. I think the rest of the car looks the nuts but the mesh on the front really isn't to my taste

Each to their own though...