catalitic convertor removal

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S

Shark

New Member
Posts
19
Hi, I have a 1997 300tdi and have been told if i remove the catalitic convertor i would get better performance and mpg.
Does anybody know weather this is true.
Regards
Mark
 
i still have my cat but did the egr delete kit and on a run can get close to 38 mpg! however this was in touring mode eg not riping the tits out and sensibly using gears and trying to not do much more than 65mph and this on a ratty old 300td disco with 148k and a crunchy box on very used road tyres!
 
listerdiesel said:
Yes indeed, the Search button is never prominent enough, and for newbies it is not user-friendly, and Vbulletin 4 is even worse, verging on unusable.

Peter
Click to expand...

the search button could be better, such as being able to search in only a single section at a time? so you dont have to trawl through several pages to find one relevant to your vehicle, it also doesnt help when people put stupid titles on their posts so you have no idea what it is about :doh:
 
Shark said:
Hi, I have a 1997 300tdi and have been told if i remove the catalitic convertor i would get better performance and mpg.
Does anybody know weather this is true.
Regards
Mark
Click to expand...



Hi Mark done 5 x TDi and 1 x TD5, all had improved mpg after the de-catt mod of about 10%
 
V8_Disco said:
the search button could be better, such as being able to search in only a single section at a time? so you dont have to trawl through several pages to find one relevant to your vehicle
Click to expand...

That's already there in the "search in forums(s)" bit on the right hand side of search page:confused:
 
Sorry for taking so long to respond, thanks everyone for your advice its been very helpfull
Cheers
 
Hi Guys,

Just following this thread with interest.

I am wondering if taking off the cat and egr on 300tdi, whilst providing greater fuel economy, by the same token creates other problems that these were designed to prevent?

I ask without engineering knowledge, and am just posing the question......an engineer friend mentioned that they were designed for a purpose so why remove them?

Please be gentle with your replies, as I have just bought myself a 300 and need to get as much information as I can for it to work properly for me ;o)

Kind regards

JohnB
 
johnb5177 said:
Hi Guys,

Just following this thread with interest.

I am wondering if taking off the cat and egr on 300tdi, whilst providing greater fuel economy, by the same token creates other problems that these were designed to prevent?

I ask without engineering knowledge, and am just posing the question......an engineer friend mentioned that they were designed for a purpose so why remove them?

Please be gentle with your replies, as I have just bought myself a 300 and need to get as much information as I can for it to work properly for me ;o)

Kind regards

JohnB
Click to expand...


Hi john i am waiting to see the out come of your question has i am in the same boat. dave
 
as far as I am aware cats were designed to reduce emmisions but mot stations do not do this test on a diesel engine so taking the cat off will not cause an mot fail. If you removed the cat from a petrol engine then emissions would increase and fail the mot unless it is lpg converted then emissions are lower than ever.

I cant see how removing it can hurt or damage the engine as cats are actually restrictive and by removing it you are allowing the engine to work more freely.

I may be wrong and am sure someone here will put me right if so ;)
 
bobbler said:
as far as I am aware cats were designed to reduce emmisions but mot stations do not do this test on a diesel engine so taking the cat off will not cause an mot fail. If you removed the cat from a petrol engine then emissions would increase and fail the mot unless it is lpg converted then emissions are lower than ever.

I cant see how removing it can hurt or damage the engine as cats are actually restrictive and by removing it you are allowing the engine to work more freely.

I may be wrong and am sure someone here will put me right if so ;)
Click to expand...

thanks for the info mate.:D
 
bobbler said:
as far as I am aware cats were designed to reduce emmisions but mot stations do not do this test on a diesel engine so taking the cat off will not cause an mot fail. If you removed the cat from a petrol engine then emissions would increase and fail the mot unless it is lpg converted then emissions are lower than ever.

I cant see how removing it can hurt or damage the engine as cats are actually restrictive and by removing it you are allowing the engine to work more freely.

I may be wrong and am sure someone here will put me right if so ;)
Click to expand...

Hi Bobbler, completely right the engine breathes better without the EGR or the cat, resulting in cleaner burning, better mpg and more responsive engine.

Logic out the window, do it and enjoy. I've done 5 x tdi and 1 x TD5 and they all improved in perf and mpg.

NEVER had any mot problems.
 
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