Modified cars and the MOT
Discussion
Noobish question -
I have never modified a car before but have wondered what happens when it comes to the MOT?
Imagine upgrading a GTi with a massive turbo and uprated injectors for example. Wouldn't the car be producing more emmisions that a stock version? So Mr MOT tests it and finds the emmisions are way too high for "a GTi", so it would fail the MOT, right? Similarly, if you transplant a V6 engine into an MR2, wouldnt the MOT assessor expect the emmisions of a smaller 2.0 4-pot?
It's probably a simple answer, but how do you get around these issues?
I have never modified a car before but have wondered what happens when it comes to the MOT?
Imagine upgrading a GTi with a massive turbo and uprated injectors for example. Wouldn't the car be producing more emmisions that a stock version? So Mr MOT tests it and finds the emmisions are way too high for "a GTi", so it would fail the MOT, right? Similarly, if you transplant a V6 engine into an MR2, wouldnt the MOT assessor expect the emmisions of a smaller 2.0 4-pot?
It's probably a simple answer, but how do you get around these issues?
Ok, so it takes into acount Hydrocarbons as part of the measurement. Hydrocarbons could be unburnt fuel, right?
So what about a highly modified Evo running anti-lag? Wouldn't this be throwing more hydrocarbons out of the exhaust pipe than a standard Evo?
Also, would you expect 4.5 litre Cerbera engine to produce the same amount of hydrocarbons as a 800cc hatchback? I just find that surprising.
So what about a highly modified Evo running anti-lag? Wouldn't this be throwing more hydrocarbons out of the exhaust pipe than a standard Evo?
Also, would you expect 4.5 litre Cerbera engine to produce the same amount of hydrocarbons as a 800cc hatchback? I just find that surprising.
I see what you are saying about percentage of emission, rather than absolute volume.
The thing that confuses me is that I can practically smell the petrol coming out of a TVR when they drive past. Do TVRs really release the same percentage of petrol vapour out of their exhaust pipes as a basic Corsa?
The thing that confuses me is that I can practically smell the petrol coming out of a TVR when they drive past. Do TVRs really release the same percentage of petrol vapour out of their exhaust pipes as a basic Corsa?
Ok, so I think I have this now...
So if I transplant a pre-cat TVR engine into a brand new Fiesta, it would have to be tested as a pre-cat TVR, rather than a Fiesta... Not that I am planning on doing this of course!
As for my mods - nothing planned for my current car (3.0 X-Type). Any more power will likely strip the delicate chocolate transfer box. For my next car though, supercharging a S2000 could be of interest.
So if I transplant a pre-cat TVR engine into a brand new Fiesta, it would have to be tested as a pre-cat TVR, rather than a Fiesta... Not that I am planning on doing this of course!
As for my mods - nothing planned for my current car (3.0 X-Type). Any more power will likely strip the delicate chocolate transfer box. For my next car though, supercharging a S2000 could be of interest.
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