What exhaust back box is on your CSL?

[shimmy]

Interested to know how many have a/m back boxes and what they are.

[DuncanR]

After track day at Bedford last Saturday where I got pulled for ALMOST pinging the sound monitor at end of back straight, I would be loathe to put anything else on it, as it would appear that the options make it sound better, but i dont know if sound better also means louder...comments please ? After returning to pits and being checked I was allowed out again.
For info my reading at the stationary check was 80dB taken @ 4500 rpm.

[_Nathan_]

I've been black flagged and sent home twice from bedford with a standard exhaust, depending on atmospheric conditions the induction and set off the meters so it may have been that?

[mattCSLnut]

Originally Posted by _Nathan_

I've been black flagged and sent home twice from bedford with a standard exhaust, depending on atmospheric conditions the induction and set off the meters so it may have been that?

Sounds like Bedford is "CSL unfriendly" + I think their dB noise limits are quite low to begin with anyway. Brands Hatch yesterday was very CSL friendly @ 105dB

[mattCSLnut]

Originally Posted by DuncanR

After track day at Bedford last Saturday where I got pulled for ALMOST pinging the sound monitor at end of back straight, I would be loathe to put anything else on it, as it would appear that the options make it sound better, but i dont know if sound better also means louder...comments please ? After returning to pits and being checked I was allowed out again.
For info my reading at the stationary check was 80dB taken @ 4500 rpm.

At Brands yesterday, my CSL's reading @ 70% RPM (5500 RPM) was 89 dB. That's with a standard O.E. CSL back box (different to a regular E46 M3 back box) but the Supersprint 100 cell cats + Stainless Steel mid section must have been liberating some of the sound. It's still very purposeful in action but relaxing and quiet on motorways and I can enjoy the induction noise more I wonder what would have been if I left the light weight MK2 MILLTEK back box on ?!?!

IMHO, the louder the better is a "No! No!" ... my MILLTEK is proof of that.

[AlexGTT]

They are idiots at Bedford sometimes! I had a couple of days without issue but on one occasion last year I was told by the noise tester as I arrived that I'd better cruise round because "these things" (CSL's) have exhausts that are too loud! I told him it was a standard car, no mods and the noise is induction. He basically dismissed me as a liar and told me my exhaust has a flap that opens up by-passing the silencer. I gave up at this point.

It wasn't a shock when I was black flagged twice and kicked off in the afternoon.

[mattCSLnut]

Originally Posted by AlexGTT

They are idiots at Bedford sometimes! I had a couple of days without issue but on one occasion last year I was told by the noise tester as I arrived that I'd better cruise round because "these things" (CSL's) have exhausts that are too loud! I told him it was a standard car, no mods and the noise is induction. He basically dismissed me as a liar and told me my exhaust has a flap that opens up by-passing the silencer. I gave up at this point.

It wasn't a shock when I was black flagged twice and kicked off in the afternoon.

Unbelievable Mupperty . Surely they noise tested your exhaust's dB before letting you out ? Once that's done and within limits, they should leave U alone, induction noise or not. THANX for the warning as I am contemplating a visit there at the end of Jan 2010 for a mate's Birthday bash.

[AlexGTT]

Originally Posted by mattCSLnut

Unbelievable Mupperty . Surely they noise tested your exhaust's dB before letting you out ? Once that's done and within limits, they should leave U alone, induction noise or not. THANX for the warning as I am contemplating a visit there at the end of Jan 2010 for a mate's Birthday bash.

Yes, static test was fine but they have a drive by meter on one of the straights and will black flag you if that is tripped.

[shimmy]

So 6 of you have got SS Race Back Boxes



I need to know;

1. What they sound like?
2. I need a passenger ride at full tilt
3. Have any of you done Bedford Autodrome with it?
4. What centre section and cats are you running?

[mattCSLnut]

Originally Posted by shimmy

So 6 of you have got SS Race Back Boxes



I need to know;

1. What they sound like?
2. I need a passenger ride at full tilt
3. Have any of you doen Bedford Autodrome with it?
4. What centre section and cts are you running?

I reckon the guys @ Bedford would take one look at that hanging off a CSL and wave a Black flag in your face, before U even get anywhere near the Pit straight