Cats and MOT's

[anonymous-user]

My original cats were shot and I have removed all the material leaving me with the shells only.
I have just rebuilt the engine and its going back in, and I will need an MOT.

So will it pass with no cat material, or do the e bay cats work for the MOT, plan is to run the car with no cats when I can.

Thanks

David

[glow worm]

Do you intended re-mapping the ECU for no Cats ?

[anonymous-user]

Was not planning to , reading all the posts some have and some have not.
are you suggesting it needs to be done ?

Thanks

[tofts]

won't need it. No post cat sensors anyway, and any small difference in breathing will be compensated for in adaptive mapping.

All I would recommend you do is do a throttle body recalibration and ECU reset

[m4tti]

tofts said:

won't need it. No post cat sensors anyway, and any small difference in breathing will be compensated for in adaptive mapping.

All I would recommend you do is do a throttle body recalibration and ECU reset

The question is "will the car pass an MOT without a cat" not "do I need a remap to run a decat"

The Cat will change the amount of CO produced. You'll pass with one but highly unlikely to without one. Unless your running a multi map standalone that has a specific "mot" map.

[tofts]

Prat.

Totally missed that. Been a long week!

No, there's no way it will pass emissions without a cat, regardless of remap. Get to know your MOT guy better!

Will read properly next time!!

Edited by tofts on Monday 27th February 00:50

[anonymous-user]

Thanks and the final part was 'do the e bay cats work for the MOT'
Has anyone tried the e bay offerings at £150 each rather than 'TVR' ones at £400 each !
Outch...

DC

[tofts]

I see no reason why not. Cats are no different from one another, so long as it will cope with the flow and your only putting 1.5l of combustion through it which is less than your average car. Theoretically any cat should work fine.

[Basil Brush]

I have a pair of ebay cats that have been used for a few mots. I think I paid 100 quid each as it's a pre 2001.

[anonymous-user]

Mine is a March 2001 so it just gets me into the 'approved' cats land, albeit I am sure I could stamp a number on them. Assuming I install with the number at the top how would they know anyway.
I think I may try the eBay route for the MOT

Thanks

[PetrolHeadPete]

I run the ebay ones (as per parts wiki entry)...have passed 2 mots since fitting

[Konrod]

I asked my local indie, he had a couple of knackered CATs in his rubbish bin, so I took them home, emptied them out (that was a sod of a job - make sure you have a good face mask) and so now have the original CATs for MOT and the emptied ones for the rest of the year. As my engine was rebuilt by Dom and has the warranty, I asked about the mapping and he said it doesn't matter, a decat map will just cut the pops, which I want to retain...

[glow worm]

Konrod said:

I asked my local indie, he had a couple of knackered CATs in his rubbish bin, so I took them home, emptied them out (that was a sod of a job - make sure you have a good face mask) and so now have the original CATs for MOT and the emptied ones for the rest of the year. As my engine was rebuilt by Dom and has the warranty, I asked about the mapping and he said it doesn't matter, a decat map will just cut the pops, which I want to retain...

and Dom will honour his warranty without CATS ??? not what he told me

[glow worm]

Dom told me any change to the exhaust system invalidated my warranty on a 4.5 SS in my Tuscan ,even with two remaps , the last the new MBE ECU . I'm running Doms non Cats pipes on my SAG and non bespoke non CAT ECU Sag chip .

[m4tti]

TVR Power Mark? That's a dormant company in Bristol.

[Milky400]

So is your warranty valid using Doms decats?

Yep, warranty paperwork is in TVR Powers name, not worth the paper it's written on I would imagine

[glow worm]

Milky400 said:

So is your warranty valid using Doms decats?

Yep, warranty paperwork is in TVR Powers name, not worth the paper it's written on I would imagine

No ... My Sag isn't rebuilt only my Tuscan Are you doubting Doms rebuild on your engine ???

[Milky400]

Not at all not doubting the rebuild, but if you read through the warranty it could be deemed worthless, especially as it's in TVR Powers name.

[glow worm]

Milky400 said:

Not at all not doubting the rebuild, but if you read through the warranty it could be deemed worthless, especially as it's in TVR Powers name.

Don't get where you are coming from ??? My 5 year warranty dated 25th Jan 2013 is in the name of Powers Performance ... which it has been for some time now .

[Milky400]

All I am saying is that all warranties are difficult to claim from if the warranty owner decided to go the legal route and that mine, although "Power Performance" is mentioned, it is headed "TVR Power" now this maybe perfectly normal... Doms work is as we know generally very good so doubt there will be any need to use it.

Anyway we have somewhat swayed from the OP. So back to topic?