Newbie modder question
Discussion
Hi Brian.
We should talk soon. I have had some more 'work' completed on my car that you may be interested in!!
A complete ss exhaust and headers for starters that is not 'straight through'.But sounds awesome!
The issue as I understand it with exhausts is principally noise and emmissions. Straight through can mean no cats and no rear muffler box - a straight pipe basically or a straight through pipe from the catalytic converter to the end at the back of your car.
I have had both of these descriptions used for 'straight thru'.
Cat Back is simply meaning a new section of exhuast from the catalytic converter to the end which can be straight thru or have a rear silencer.
See Jagsys video on the video links on uk drivers club that should help.
I am sure others will provide a better explanation but this is a start.
We should talk soon. I have had some more 'work' completed on my car that you may be interested in!!
A complete ss exhaust and headers for starters that is not 'straight through'.But sounds awesome!
The issue as I understand it with exhausts is principally noise and emmissions. Straight through can mean no cats and no rear muffler box - a straight pipe basically or a straight through pipe from the catalytic converter to the end at the back of your car.
I have had both of these descriptions used for 'straight thru'.
Cat Back is simply meaning a new section of exhuast from the catalytic converter to the end which can be straight thru or have a rear silencer.
See Jagsys video on the video links on uk drivers club that should help.
I am sure others will provide a better explanation but this is a start.
Hi Brian if you have a contact number I will call and let you know I suspect it will be mid afternoon I am afraid as I am gettign atrain from Bristol to Salisbury to pick up the car - a convenient meet place really not where the work has been done.
But it may be later!! I will not know myself until tomorrow lunchtime
e-mail: seancom@blueyonder.co.uk
But it may be later!! I will not know myself until tomorrow lunchtime
e-mail: seancom@blueyonder.co.uk
A cat-back is generally a new exhaust system that bolts on to the rear of your standard catalytic convertor and is a generic term.
A straight through cat-back is one with no silencers. Effectively, the catalytic converter is the only silencing and it's pretty effective. However, long pipe runs cause droning inside the car so some straight-through exhaust have an expansion chmber which is basically an empty silencer to break up the length of pipe.
Headers are the exhaust manifolds.
A complete straight-through system is one without cats which will rip your eardrums but which won't be legal on noise grounds and on emissions possibly but post-92, a catalytic convertor is compulsory. there are also sensors which will detect the lack of a cat and light up your check engine light. You can buy hi-flow cats that are as good as a straight-through.
A straight through cat-back is one with no silencers. Effectively, the catalytic converter is the only silencing and it's pretty effective. However, long pipe runs cause droning inside the car so some straight-through exhaust have an expansion chmber which is basically an empty silencer to break up the length of pipe.
Headers are the exhaust manifolds.
A complete straight-through system is one without cats which will rip your eardrums but which won't be legal on noise grounds and on emissions possibly but post-92, a catalytic convertor is compulsory. there are also sensors which will detect the lack of a cat and light up your check engine light. You can buy hi-flow cats that are as good as a straight-through.
The CAT generally sucks a bit of power as it restricts the airflow, however it apparently reduces the emissions. So more power by removing it, but you run the risk of increasing emissions 
.
The MOT checks emission levels so you probably won't pass without a CAT, however most people know a friendly MOT station who overlook this minor fact.
The MOT tester does not use a dB meter to check for noise although generally a very loud exhaust would again be up to the discretion of the MOT tester, I just had my bike done last week and was unlucky enough to have an MOT inspector overlooking the test and he pointed out some things like the exhaust now does not have to have BSI/Manufacturers stamps but must be no louder than an OEM exhaust, again how do you test for this ?
Remember that you don't need an MOT for 3 years so just change the whole thing and enjoy it, cats are for pussies anyway
. The MOT checks emission levels so you probably won't pass without a CAT, however most people know a friendly MOT station who overlook this minor fact.
The MOT tester does not use a dB meter to check for noise although generally a very loud exhaust would again be up to the discretion of the MOT tester, I just had my bike done last week and was unlucky enough to have an MOT inspector overlooking the test and he pointed out some things like the exhaust now does not have to have BSI/Manufacturers stamps but must be no louder than an OEM exhaust, again how do you test for this ?
Remember that you don't need an MOT for 3 years so just change the whole thing and enjoy it, cats are for pussies anyway
Gassing Station | HSV & Monaro | Top of Page | What's New | My Stuff