atomic

Hi,
Has anyone removed the Cat and done an emissions test?..
I know the cat on the S2000 is A Metal Substrate one, which is far better then the Ceramic ones commonly used on production cars but I am thinking of building a kit car using this engine an getting and using the cat is going to be an additional expense. I no the Law is giong to require a cat but I was thinking about spot checks ect after removal for track use.

Pie_n_Chips

Not as of yet, but reading through various threads in 'under te hood' it would seem that unless your running forced induction there is little point in decating, as the OEM cat is a high flowing affair to start with.

Although that isn't going to stop me guttig my spare cat and testing this theory

tim_d

You may well only need a Cat for SVA on the kitcar, and not for subsequent MOTs. The MOT wording currently states that for amateur built cars visible smoke test only is required. I've got some info on this somewhere if you want me to dig it out and post here?
Lots of kitcar companies offer a "rent-a-cat" service to get you through the SVA test.

atomic

My understanding is that because it will be registered as a 51 plate as that is the age of car the engine has come from then it will need a cat by law. True I could remove that cat after the SVA test but to be honest if its there to begin with I don't see the point. My exhaust man said he could build the cat into the silencer so I think I may go that route.
I have used the metal substrate cats before on my old escort cossie and found them to be very efficient and with just the right amount of back pressure.

Beardie

Won't it be registered as a Q plate?

tim_d

Nearly correct. Currently as things stand you will need a cat for SVA, but you won't need one for MOT, provided you build the car, rather than buy it factory built.

That said, if you're happy to run the cat, go for it. IMO it's just dead weight, but it all depends what type of car you're trying to end up with. For a track monster, the cat's just along for the ride, as a roadcar, who cares really!

There are a few S2000 engined Westys floating about these days - AIUI the height of the engine is more of a problem than whether to fit a cat or not!

atomic

No the Car will not be on a Q plate. Q's are not really issued theses days. Because the only component of the car to be second hand is the engine then I can register the car with a plate dating from the engine year.

The engine is dry sumped, making it 102mm lower in height.

tim_d

It doesn't matter if it's Q plate or not. The key wording (and I was careful not to introduce Q plates into the equation) is Amatuer built vehicle. This currently applies to Q, age related, and current registrations.

Some, but not all, newly SVA'd cars are getting emissions info on the V5 which, in theory, will eventually be linked to the MOT computerised database, and therefore those cars (if they have a current plate) will be tested to the relevant level. Q plated cars will always be visible smoke only as the whole point it "vehicle of indeterminate age". Yet another plus point for Q plates!

As I said earlier, depends what sort of car you're building it into. IMHO if it's a track car, get it on a Q plate and leave all the excess crap off it. If it's a comfy road cruiser, and you're a plate snob , leave the cat on and use a current plate.

What car are you putting the engine into??

atomic

It going into a Quantum Xtreme.
http://www.quantumcars.co.uk/xtreme.htm

tim_d