Decat pipe

[Finto_GX]

Hi,
just want to know if i make up a decat pipe so i can switch it when it comes to mot time , will it give me the loud noise im looking for? also does anyone have a picture of theres and what collars do i need to connect to manifold and pipe?
thanks

 

[skymera]

A different back box will add some noise..

Sent from my GT-I9100 using Forum Runner

 

[Finto_GX]

i taught this option would be cheaper as i like the tip on the original exhaust and its a kind of stealth look if you know what i mean

 

[McMicra]

Well if you like the look of the back box, take it off cut it open cut out the baffles weld it back together HEY PRESTO!

 

[Finto_GX]

thats acc a good idea thanks

 

[Finto_GX]

would the lamda sensor be affected and make it use more petrol?

 

[McMicra]

would the lamda sensor be affected and make it use more petrol?

With the backbox cut?

Far as am aware there are no sensors that far back on the exhaust system

 

[Finto_GX]

no the catalyic converter

 

[skymera]

Btw I had a full decat on standard exhaust and it had no noise.

Sent from my GT-I9100 using Forum Runner

 

[Finto_GX]

really? would the backbox de baffled pass mot/nct emissions?

 

[Finto_GX]

is this not the sound a decat would give?

 

[Finto_GX]

can anyone tell me if i cut out all the baffles in the rear box will it effect the emissions for mot/nct? Casue it will still haver its two cats?

 

[Finto_GX]

anyone know anything about the emissions if i cut the baffles out?

 

[mottymicra]

Btw I had a full decat on standard exhaust and it had no noise.

Sent from my GT-I9100 using Forum Runner

Scott didn't you have a facelift mid section? If so, that's got a silencer in. If you wanna run a standard back box with a full straight through like I had for a while, it sounds like a moped :/ does make good fire though

 

[Finto_GX]

i couldnt be arsed going throught the bother of making a staight through, just looking cheap and simple, no money at all really

 

[mottymicra]

i couldnt be arsed going throught the bother of making a staight through, just looking cheap and simple, no money at all really

A lot easier than cutting baffles out...

 

[Finto_GX]

why are baffles hard? my fathers a welder so i can get him to weld it all back up no problem? grinder be no problem surely?

 

[mottymicra]

If your dad is a welder keep the back box standard, take the centre pipe, cut the cat out and weld a bit of pipe in. Top job smiles all round

 

[Finto_GX]

but then for nct/mot i would have to weld a cat back in surely?

 

[frank]

is your k11 japspec finto ?

 

[Finto_GX]

its a 97 micra gx? jap specs here are marches are they not?

 

[frank]

its a 97 micra gx? jap specs here are marches are they not?

aye, because the japspec ones only had 1 cat iirc, and the generic decat pipe is for the 2nd cat usually

 

[Finto_GX]

so my only way of any sort of noise without going near the cats is debaffle rear silencer?

 

[frank]

so my only way of any sort of noise without going near the cats is debaffle rear silencer?

you can remove the 2nd cat np (if yours has one) but not the 1st cat, if you want to pass the emissions, and the back box does most of the noise reduction.
so a straight pipe instead of the back box will brap brap

 

[Finto_GX]

little confused here, so remove 2nd cat and i have brap brap or remove 2nd cat and straight pipe where silencer should be or keep silencer?

 

[frank]

the 2nd decat wont do a fat lot tbh, the rear silencer delete will increase the brap brap bigtime

 

[Finto_GX]

im thinking of either cutting open silencer and weld a straight pipe through it or cut box out and weld exhaust tip onto pipe, ill prob go with the first idea

 

[Low Rider]

If you add a decat pipe later on though, (especially one that's just a straight spool), it'll turn the car into a right irritating noise box >.<

 

[skymera]

If you add a decat pipe later on though, (especially one that's just a straight spool), it'll turn the car into a right irritating noise box >.<

Agreed. You need a silencer or back box of some sort.

Finto if you'e going to remove the cat and rear silencer it'll result in the sound that resembles agricultural vehicles.

 

[frank]

here,s what eliot,s backbox delete looks and sounds like http://www.micra.org.uk/threads/exhaust-modding.48168/#post-496138

 

[mrcheese]

You could leave the cats in place and remove the center silencer. No prob for mot.

 

[Dougyledds]

here,s what eliot,s backbox delete looks and sounds like http://www.micra.org.uk/threads/exhaust-modding.48168/#post-496138

What would you charge to make me one frank

 

[frank]

What would you charge to make me one frank

it was some leftover pipe i had dougy, that happened to be the right shape

 

[Dougyledds]

it was some leftover pipe i had dougy, that happened to be the right shape

Lucky that is! i want something decent for the backbox just now.. ive got a civic backbox but no idea how that would look on! haha

 

[Finto_GX]

thats a nice wee noise off it ill do that, anyone know it it pass mot/nct no?

 

[Eliot]

thats a nice wee noise off it ill do that, anyone know it it pass mot/nct no?

If you want to hear what it sounds like on your car just unbolt the back-box and start her up. If you wanted you could cut where the pipe meets the back-box to retain that bend to clear the rear axle and weld a bit more on and put an exhaust tip on. It should be fine for the MOT.

 

[Enuo]

If you want to hear what it sounds like on your car just unbolt the back-box and start her up. If you wanted you could cut where the pipe meets the back-box to retain that bend to clear the rear axle and weld a bit more on and put an exhaust tip on. It should be fine for the MOT.

Mine failed on having no baffles in the backbox...

 

[Eliot]

Mine failed on having no baffles in the backbox...

Yeah I suppose its where you take it aswell. Some are more lenient