*NOISE NOISE NOISE*

[James Marchment]

My 182 with itbs is failing track noise limits.

What is the exhaust diameter? I need to get a silencer welded in.

Manifold back is standard fitment

Please help!!!

 

[Crybert]

I’ve never understood noise limits on track. Surely given most aren’t even road cars what’s the point in noise limits? Not like they’re right next to houses or anything

 

[MarkCup]

Is it not the intake causing you the problem? Every ITB 1*2 I've heard on track has been far louder coming toward me than going away!

 

[imprezaworks]

I’ve never understood noise limits on track. Surely given most aren’t even road cars what’s the point in noise limits? Not like they’re right next to houses or anything

Tis the law. Although when i have been ive been amazed some have been allowed on.

 

[hipwell]

My 182 with itbs is failing track noise limits.

What is the exhaust diameter? I need to get a silencer welded in.

Manifold back is standard fitment

Please help!!!

 

[hipwell]

Standard exhaust is pretty much silent. It must be the itbs or a cheap OEM exhaust causing you the bother.

 

[bloke]

Induction.

 

[James Marchment]

Is it not the intake causing you the problem? Every ITB 1*2 I've heard on track has been far louder coming toward me than going away!

Measurement is taken form the tail pipe so i'm not sure about that...

 

[James Marchment]

Standard exhaust is pretty much silent. It must be the itbs or a cheap OEM exhaust causing you the bother.

Standard manifold, with sports cat and k tec system. I have to do something with the exhaust or i wont get out at my home circuit of Thruxton...

 

[R3k1355]

Which Ktec system, don't they offer a few options?

 

[green]

What dB does it blow at 4K revs? Has the exhaust system have a mid silencer? How old is it?
I found my old ktec recessed exhaust got very loud and boomy after a few years.. So to be sure I wouldn’t have a problem I went with the 172 Pure motorsport exhaust. My system is 182 manifold, sport cat, 2 silencers and itb’s blows 93db out the back I’m not sure what the dB at the front is but I’ve been round Thruxton a couple of times...never had a problem.

 

[hipwell]

Standard manifold, with sports cat and k tec system. I have to do something with the exhaust or i wont get out at my home circuit of Thruxton...

That's completely different to your original post lol. A ktec system is way louder than the stock system.

Depending on which system you have ktec sell centre silencers to fit most of them, I did this on my previous 172 system which was straight through to the backbox and it took loads of noise out of it.

 

[Brigsy]

Airbox to dull the induction noise off the itbs a bit if you have room ?

 

[Brigsy]

I’ve never understood noise limits on track. Surely given most aren’t even road cars what’s the point in noise limits? Not like they’re right next to houses or anything

Its usually some prick who moves near the circuit and complains about it being too noisy, knowing fine well its going to have a bit of noise through the day, which puts restrictions on db level. My local circuit Croft had a carry on a while back.

Never understood the mega strict driveby at Donnington though as the airport is next door to it, and planes flying in all hours. Me doing 98.2db on 98db driveby resulted in black flag

 

[James Marchment]

That's completely different to your original post lol. A ktec system is way louder than the stock system.

Depending on which system you have ktec sell centre silencers to fit most of them, I did this on my previous 172 system which was straight through to the backbox and it took loads of noise out of it.

My Mistake, ktec full system. Bough not built so i'm not sure which system it is...

 

[James Marchment]

What dB does it blow at 4K revs? Has the exhaust system have a mid silencer? How old is it?
I found my old ktec recessed exhaust got very loud and boomy after a few years.. So to be sure I wouldn’t have a problem I went with the 172 Pure motorsport exhaust. My system is 182 manifold, sport cat, 2 silencers and itb’s blows 93db out the back I’m not sure what the dB at the front is but I’ve been round Thruxton a couple of times...never had a problem.

It was 99db at 5250 rpm at brands (98db limit) Thruxton is 90db. No silencers between cat and back box. I'm getting a silencer added next week so hopefull that will drop it.