MPG question

dgt

Simple realy, which has better mpg, cat or decat? Too many people say one or the other, need this cleared up for once and for all!

Midnight_EG

dgt wrote: »

Simple realy, which has better mpg, cat or decat? Too many people say one or the other, need this cleared up for once and for all!

I can honestly say I've noticed no difference in economy in my EG Civic since I put the decat in in May... just louder is all. Can't comment on my EK Civic as I haven't driven it with the car in just yet, will be soon for the NCT

Senna

I heard a few people on the Toyota UK forums say it makes no difference to MPG. They are putting on/taking off cat yearly for MOT.

dgt

Thanks for the replies, ive noticed no significant difference in the mpgs (slightly harder at the mo but it changes) other differences are the car revs up cleaner and faster and theres that good old smell of burnt petrol fumes thanks again!

Matt Simis

dgt wrote: »

Thanks for the replies, ive noticed no significant difference in the mpgs (slightly harder at the mo but it changes) other differences are the car revs up cleaner and faster and theres that good old smell of burnt petrol fumes thanks again!

On bigger engines Ive noticed a slight MPG improvement.

shedweller

But what about the resulting increase in emissions?

Matt Simis

shedweller wrote: »

But what about the resulting increase in emissions?

Lol, yeah I dont sleep at night now. Im quite into the "Energy scene" and can assure you the odd enthusiast car emitting more emissions isnt much compared to the unregulated Shipping world where tankers emit 1000x more pollution than a Coal power plant does.

If you mean for NCT, I dont need one, car is 1993. Others just pop back in the Cat for the test. You dont need a Cat for the NCT, just low enough Emissions, so technically a Cat-less E85 fueled car could pass (mine didnt though).

Gary ITR

I noticed a slight drop but I added a higher flow header and exhaust along with a higher flow airbox, depends on your car really