555 replies to this topic

[Muncher]

For the pop on the overrun coming off the throttle I managed a momentary peak of 118dB static

[techieboy]

0.5m and 45 degrees...

92dB at idle
107dB at 4,500rpm with a bit of wind

For the pop on the overrun coming off the throttle I managed a momentary peak of 118dB static

Ouch. Welcome to our world.

[The Batman]

matt, do you want to come to get tested at bedford this week? will be good to get a result of my backbox and then your backbox with added 6"

[techieboy]

matt, do you want to come to get tested at bedford this week?

will be good to get a result of my backbox and then your backbox with added 6"

Don't think I'll be able to Joe, as I haven't got my car now. Pro Alloy have got it for a few days, which probably means middle of next week. Nick wants to get his beastie checked though - not that that's much good for comparing with ours.

P.S. I have the same rearbox as you at the moment not the wider version. But do have the small post-cat silencer as well.

Edited by techieboy, 01 April 2009 - 04:55 PM.

[Timbo]

107dB at 4,500rpm with a bit of wind

That is REALLY loud!

Thats not very loud really

[The Batman]

i can wait until next week, or do both

[techieboy]

Thats not very loud really

[Muncher]

Thats not very loud really

It doesn't feel overly loud to me, in comparison to some of the other cars I've been around. I've done events like vmax where even now 75% of the cars would be louder than mine.

[Timbo]

You've obviously not heard mine then

[The Batman]

You've obviously not heard mine then

timbos is the titanic beemer with exhuasts to match the ice berg

[Crazyfrog (Fab)]

You've obviously not heard mine then

timbos is the titanic beemer with exhuasts to match the ice berg

timbo is a car park vandal

[Timbo]

You've obviously not heard mine then

timbos is the titanic beemer with exhuasts to match the ice berg

timbo is a car park vandal

Fab, bring on the 16th may, more vandalism

[alanoo]

Any idea when the 4/1 will be available ? I really need something better than the stock manifold now.... and I see that one as a good start for a 4/2/1 conversion

[Muncher]

Any idea when the 4/1 will be available ?

I really need something better than the stock manifold now.... and I see that one as a good start for a 4/2/1 conversion

I'll speak to Chris and see if he has got time to check it on mine when that's back with him from next week.

[Muncher]

I took the car back to Chris today, carried out two noise tests, 50cm and 4,500rpm using his much more expensive looking dB meter. Both readings were 96dB. Looks like the iphone was actually closer to a realistic reading than the standalone dB meter! He's now extending the silencer by about 5 inches, so up to ~32 inches long, making it repackable and adding a hole for a wideband lambda sensor should I ever want one.

[alanoo]

and nothing about the 4/1 ? (actually I'm almost sure the stock manifold steals me about 20hp, so I am a bit impatient to have it replaced )

[Muncher]

Doh, I forgot sorry, I will call Chris on monday or tuesday. Are you after the 4-2-1 or 4-1? The 4-1 which fits onto the standard flange is already done, in which case I only need to find out a price for you.

Edited by Muncher, 10 April 2009 - 07:19 PM.

[alanoo]

I guess the delay for a 4/2/1 will be too long unfortunately...

[Muncher]

I guess the delay for a 4/2/1 will be too long unfortunately...

I'll ask Chris but I wouldn't have thought it'd be too long, maybe a week or two?

[The Batman]

Both readings were 96dB

He's now extending the silencer by about 5 inches, so up to ~32 inches long

if it is 96db now, why is he adding an extra 5"s?