Is having no mufflers bad? VX

[tdirago]

got a 2.5" with no mufflers, just cat.

it sounds good, just wondering if its bad for the engine ect? back pressure, fuel economy n stuff

only answer this if you're 100% sure, ive read so much **** that isnt true because people have no clue and post anyway

 

[General Xander]

no. car will retune it self to suit any minor changes you make, like the exhaust. the only problems you will get is from the cops coz of noise.

 

[klampy]

its bad as far as possible noise limits being breached as such, but as long as the piping is the appropriate size there will be no negative impact on the engine.

some say that you need a certain amount of backpressure in the exaust, but i certainly wouldnt be looking for that inside a muffler.

hth.

 

[wraith]

Illegal for a start.

 

[klampy]

got any vids of how it sounds?

 

[tdirago]

thanks xander and klampy... thats good to hear

i have noticed however that my economy use to sit at around 650, and now sits at 500... and there is a rich smell of unburnt fuel. could this be my o2 sensor failing or what?

ive noticed this only after getting it cut out as well, i know it isnt my oil, coolant, spark plugs, fuel injectors n **** because that usually detoriates over time, this just happened.

 

[tdirago]

nah, it sounds ####ing nice though man, gear 1 up to 6000revs is so nice hahah.. ill get 1 when i have a decent sound recorder

 

[klampy]

it certainly could be the O2 sensors. depending on how old they are it might just be time to replace them, they dont last forever...

 

[tdirago]

well i got done for walls (major defect, load of bs) so i need to put a stock catback on for rwc, so is it hard for the muffler guy to inspect or?

 

[walesy]

ive had twin 3in with no mufflers (just hotdogs) for bout 3 years now and no issues