japspeed + de-cat db level?

[afennell]

Has anyone measured the noise of a japspeed with a decat on idle and at 4k?

[Steve-O 2007]

I think Jeff measured the noise, dont know if it was at 4k revs but I think it was something like 112db (this might have been on idle) I think he posted it in the General section or mechanical somewhere

[Lewis Jay]

Someone asked me about the one I have for sale at the moment.

This is what I said........................

"It rattles my door knocker and the radiator (its abit loose) in my living room on idle.

It sets car alarms off on my street if I drive off at more than 2500rpm and you cant have a conversation with somebody in the passenger seat of the car if you are doing 70 in the motorway.

My wife estimated that she could here me coming from over a mile away in a built up area"

http://cgi.ebay.co.uk/ws/eBayISAPI.dll? ... 0375543668

Shameless plug for my for sale advert, I know, but the above reply to a question about my exhaust is all fact.

[CM1GT]

i drove mine to work last week, one of the supervisors asked me if i'd like some car with my exhaust

[LiamTye]

love setting alarms off with my japspeed

the jap speed aint got anything on my mates trust exhaust on his scoob

this thing is stupidly loud you really cant have a convo with him in the car,told him it makes it look like a proper cavvy car and especially with his silly high rise spoiler they all put on then

[afennell]

oh, i already have one after replacing my old goose.

The reason im asking is i'm looking at doing more track days this year. I had no problem with the goose but it's looking like the the jap speed may be a problem.

May have to change to a blue flame, or othe quiter exhaust, hated the sound of the goose it seemed to resonate through the car and my head.

[Steve-O 2007]

hated the sound of the goose it seemed to resonate through the car and my head.

Blueflame will do the same. I thikn Mongoose and Blueflames are technically the same but just differetn end pipes.

[blue2]

Mine is very loud but I can talk to someone at 70 no probs. Its funny how it sets of car alarms though, my nieghbours are quite forgiving though

[Steve-O 2007]

Also, mine is fine at 70mph, Infact with the windows closed its fine at nearly all speeds, doent bother me at all but I dotn think the cars sitting behind me are too happy lol

Oh and I think I made someone Sh!t themself the other day, drving along at 60 in 5th, passed someone on a push bike let off the accelerator pedal to start slowing down for a roundabout and BOOOOOOOM a Huge bang and flames out of both pipes

[LiamTye]

Also, mine is fine at 70mph, Infact with the windows closed its fine at nearly all speeds, doent bother me at all but I dotn think the cars sitting behind me are too happy lol

Oh and I think I made someone Sh!t themself the other day, drving along at 60 in 5th, passed someone on a push bike let off the accelerator pedal to start slowing down for a roundabout and BOOOOOOOM a Huge bang and flames out of both pipes

i cant seem to get mine to pop and bang,my mate said ive hang a flame out of it before but was only one side and quite small,prob something to do with the slipping clutch cant really give it beans

[Steve-O 2007]

I think it was more of a pop from the unburnt fuel exploding but I get small pops made by the exhaust when slowing down with the revs falling

How long has yours been on? I think the more sooty inside the better for pops someone was saying.

[LiamTye]

had mine since may last year

i get little pops but not very loud ones,usually when i give it some,if i really push it i can get a loud bang in between gear but not usually on the over run

[Leon.]

If you lift off the throttle (over run) and slow to ~10 MPH, you should get a burble type of popping. If you come off the throttle at higher speeds, when you next apply the throttle you should get a bang of varying loudness depending on revs and duration of over run. Sometimes get it during gear change too, but less often. Can be pretty loud

Motoria + SSQV = + lots of people pooing their pants

[LiamTye]

love the noise you get in between gears

yeah i know the burble you mean

cant wait to get my cast off then will be driving again cant wait

gotta get it moted in a few days

8 days and counting till my casts off

[Dale_V]

love the look of the motoria

ive took mine off to sell though as its just too loud on my NA I had thought about having it opened up to put more wadding in to silence it, but at the £180 i was quoted, it cant be justified!

[afennell]

hated the sound of the goose it seemed to resonate through the car and my head.

Blueflame will do the same. I thikn Mongoose and Blueflames are technically the same but just differetn end pipes.

Dam it, I just want a free flowing exhaust that is not too load.
I did go in a 2 with a blue flame and i sounded fine, although that still has it’s cat in place, i suppose that could make a big difference.

[afennell]

Also, mine is fine at 70mph, Infact with the windows closed its fine at nearly all speeds, doent bother me at all but I dotn think the cars sitting behind me are too happy lol

Oh and I think I made someone Sh!t themself the other day, drving along at 60 in 5th, passed someone on a push bike let off the accelerator pedal to start slowing down for a roundabout and BOOOOOOOM a Huge bang and flames out of both pipes

I do love the Japspeed and find it more comfortable and even quieter then the goose when driving at 70mph.
Hopefully it can pass noise restrictions or I will have to look at getting a bung.

[Steve-O 2007]

or I will have to look at getting a bung.

Might need 2

Oh and yea that Blueflame with a Cat would sound alot louder when de catted

[Steve@EdgeAutomotive]

Sounds a bit like...

http://www.youtube.com/watch?v=Z1KileKDaLI

Steve

[Martin F]

Has anyone measured the noise of a japspeed with a decat on idle and at 4k?

i'm not sure about DB but when i get my mot done the pictures on the wall vibrate