Mongoose sound levels for those that keep asking

[Fast Guy]

Just tested mine again, it's been on the car a few months now and has quietened down abit.

At idle 70db
At 4500 87db

Taken in my backyard (quite confined) from the drivers seat, with the door open.

 

[gotoinstant-redline]

are you not meant to do the noise test about 1m form the exhaust outlet? at 50% engine rpm??

L.

 

[J-GTi-R]

Yep, the revs you need depend on the circuit, but the dB meter is always a meter from the exhaust.

 

[GTI-R Kid]

You have the Mongoose with the 5" tip dont you Fast Guy?

Does anyone know if there's any difference in noise levels between the 3.5" and the 5" tips?

 

[gotoinstant-redline]

if its 50% louder than my normal 3.5 then someone is gonna die!!! my 3.5 is very loud.. love it to bits!!

L.

 

[srbpower]

They do make a nice sound, remember listening to Lee's as he pulled off from mine ages ago

Just as a comparison, from what I can remember dans blitz nur spec on the 200 with decats registered 104db at idle :shock: :roll: :twisted:

Si

 

[Fast Guy]

Yes I have the 5".
Have you ever tried putting one foot one the accelerator and holding a sound meter 1m from the exhaust at the same time?
I'm only 5'7

 

[memski]

are you not meant to do the noise test about 1m form the exhaust outlet? at 50% engine rpm??

L.

Isn't it usually 3/4 max rpm? 5500rpms in our case?

Where can I go to get mine checked?Would like to see the difference it makes with and without the baffle and whether the likelyhood of getting blackflagged is high :?

 

[J-GTi-R]

If you can make the trek to one of the Castle Coombe track and show days next year (Japfest, CCC etc), the scrutineers there usually will give you a test if you roll up between track sessions.

 

[gotoinstant-redline]

you wont get black flagged.. they just plain wont let you on the track if your exhaust is too loud! if you pass the test then you may ride...

but i spose if you did the test with the baffels in then took em out you might get kicked out! not really a good idea to piss them off.

L.

 

[Anonymous]

well thats not that high, would have to be at least another 5 - 10 db higher then that if you sat the db meter just behind the car. i just fitted highflow cat and it seems to have quitened down a bit not as deep and burbly like the burble it had with the standard cat has now sorta speed up into a constant drone..

 

[skiddusmarkus]

I'd imagine it's a lot louder when the engine is under load.

 

[MarkTurbo]

My mongoose was about 99 db at either 4000 or 4500 rpm (can't remember which ) when i was at castle combe for japfest.

It'd be interesting to find out how loud they are under full load at 7000 rpm :shock: