Diesels have to pass a smoke test not an emmisions test.
Decating will create more black smoke (dont know about power gains) so im still sitting on the fence regarding this mod.
Liam.
If you de-cat a standard exhaust you will gain nothing to notice as the restriction is in the back box. You can de-cat a diesel car exhaust and it makes no difference at MOT time. Taking the cat off should make no difference to the smoke out put as a CAT filters the exhaust gasses nothing to do with removing carbon particles which is why it makes no difference to a UK MOT.
Ive heard alot of things, both good and bad about de-cat on a tdi, but not sure what the facts are.
Diesels are much louder than petrols so I guess they baffle the rear silencer a lot more which restricts it. You should definitely go for a downpipe which decats the car...this does make a difference.I was thinking about getting a decat downpipe for my PD150......were saying its not worth it as the rear box is the restriction?
Seems a bit strange doesn't it? on a petrol the cat back makes no power gains but a decat makes a massive difference, how come its reversed on a diesel?
I cant remember now but I believe it does slightly earlier. You will get a lot more torque over the range with a downpipe and hold the power better.That makes a lot of sense about the noise.....I'm still learning about diesels
Does the decat make the turbo spool up faster like on a petrol?
I cant remember now but I believe it does slightly earlier. You will get a lot more torque over the range with a downpipe and hold the power better.
HI M8Ive heard alot of things, both good and bad about de-cat on a tdi, but not sure what the facts are.
What would i gain if i went de-cat on standard exhaust?
Ive also heard that you wont fail the mot on emisions with it de-cat as they test something else. IS this right?
Sam
get yourself one of these
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