De-cat and standard exhausts how loud in db?

[da_murphster]

Considering a decat to e used daily with my CCC on my Mk1 Tuscan (non RR/S).

I do want the option of taking the car on a normal track day - would put original exhaust back on.

Would I pass 105db days?

Are there cheap - quiet cans?

[andyoleary]

I have a RR with standard bore exhaust, CCC's and de-cat and measured 117dB at Brands. Can't see changing the CCC's for standard pipes bringing it down to below 105dB to be honest.

Andy

[TuscNick]

I clocked up 127DB, with mine - 4.0L Tuscan, CCCs and Decat

Track days are out for me - unless I re-cat, and change CCs

Nick

[da_murphster]

127db!!!

The standard cans are significantly quieter....if they are over they must be close.

I'm really suprised I'm struggling to get an answer for this - do not many people track their Tuscans?

Decat must be the most cost efficient power mod (esp as you normally see a couple of mpg gain).

I'm assuming that replacing the cats for a track day is a nause? How long would it take?

[NTEL]

Decat plus CCC's on my Tuscan measured 129.2 dba at the BNG last year Toooooooooo Loud Man.

I made a pair of semi silenced cans which I now run all the time. They measured 105 dba on the nail at a track day at Oulton Park. So, ideal for all round use.

Decats plus standard silencers would be well within the limits, so just get a pair of standards cans for track days. They only take 2 minutes to change.

Edited by NTEL on Wednesday 16th July 12:37

[BatleyBoy]

Are these dB readings at a given RPM, or is it just measured at whatever it max's out at?

[andyoleary]

Mine was measured at around 3500rpm I think.

Dave - do you really think decat with standard cans will bring the levels down to below 105?

Andy

[NTEL]

andyoleary said:

Mine was measured at around 3500rpm I think.

Dave - do you really think decat with standard cans will bring the levels down to below 105?

Andy

Well, mine do Andy. Even my own semi silenced cans are bang on 105dba at 4700rpm and they are only 1/3 perforated.

[da_murphster]

Hmmm....interesting....so I can still track with decatted car......

....but the question is can I cope with the increase in noise with decat and CCC....

definate chin stroking to be done....