Exhaust dpf dilemma

Mick H

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I’m in a bit of a dilemma with what to do about my exhaust. Car is going to be mapped by Rick at Unicorn first week in feb. So would like to have it sorted before so as not having to have it done twice and throwing good money away.
Firstly my driving. I do quite a lot of short journeys (hence dpf worries) however previous bus a3 black edition 2.0 170, half Quattro with revo map never once gave me a dpf light on the dash so left it alone. I would like a little more rasp ( without joining the 1.2 Corsa club at McDonald’s on a Saturday night) from the 3.0 tdi and have just got a quote for a back box delete and renew up to Dpf which I’m happy with and they do nice work.
So my dilemma now as I’m thinking to much is
1. Go ahead with this trust I won’t get any hassle dpf wise,gain a little more rasp as dpf takes so much noise out.
2. Get a knackered dpf, gut it egr delete and put bespoke silencer in somewhere. Mot time put dpf back on not hard as underneath car and flanged either side.
The quandary is
Option 1 cheaper and easier have heard the 3.0 tdi isn’t bad dpf wise
Option 2 more costly, more hassle for a few bhp but no dpf concerns other than how will the map handle std dpf going back in for mot. Also is egr existence part of mot ?
Any opinions ??
 
Is dpf visable to mot tester and is there a blind side ?

Egr off is just software , nothing to see , no MOT issue .

Dpf delete software excepts a very wide range of pressure sensor readings so not to cause an eml , limp mode or regeneration.

If you for instance put a gutted dpf on stock software it would cause eml and limp because the values would be too low and the software would think the dpf has a leak .

But no problem the other way around .
 
Dpf is visible to tester it’s underneath would gut from top side, only reason I would use gutted dpf as opposed to straight pipe is accident/ insurance so as at least theirs a chance it looks legal. I would use a good dpf for mot so tester viewing wouldn’t be an issue. Understand dpf delete without software delete is a no no but wasn’t sure how a mapped car with dpf delete would react to good dpf being put back on for purposes of mot. However you say it would be ok
 
Thats what I'm planning on doing. I've just picked up a cheap aftermarket dpf, going to hollow it out. And if it fails mot I'll bolt the original one back on just for the retest.
 
Think that’s the only way now with regards the mot. Lucky mines underneath so not so much of a job as some
 

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