rob275 1817 Report post Posted August 28, 2014 Hello there! someone has data only resonated cobra catback system? Keethos has a resonated cobra system Share this post Link to post Share on other sites
Keethos 842 Report post Posted August 29, 2014 Yes, as Rob said, I have the resontated cobra catback system but I've also had the 2nd CAT deleted, however, even though I've had the 2nd CAT removed which typically increase the volume of the systems, my last trackday was at Cadwell Park and I'm sure I got 89db which I was really surprised about....I thought it might have been a lil higher.....though it might be on drive bys rather than static tests at around 5500rpm. Share this post Link to post Share on other sites
KevinA 695 Report post Posted August 29, 2014 I have fitted an Agency power system, will get the db kit out later and do some tests. Share this post Link to post Share on other sites
CHOSENMAN007 81 Report post Posted August 29, 2014 Yes, as Rob said, I have the resontated cobra catback system but I've also had the 2nd CAT deleted, however, even though I've had the 2nd CAT removed which typically increase the volume of the systems, my last trackday was at Cadwell Park and I'm sure I got 89db which I was really surprised about....I thought it might have been a lil higher.....though it might be on drive bys rather than static tests at around 5500rpm. For me its hard to see how the cobra system has the label of being so loud. Not heard one in person. I got a cobra non res front pipe with a 200cell cat but with a de cat manifold and even now I think I'm not that loud. Maybe its the rest of the cobra system. We should get the dB tester out at abbey tomorrow since I'm planning some track time to. Keith I hope your there want to hear your pipes dude. I like loud ; ) I cant say if there is much of a difference in dB from a res to a non res , the resonated for me just gave me a deeper tone and after a swapped to the non res it gave me a true ricer sound top end that high pitched rev. Love it. But on the swap out I de catted my manifold so really my view might me pointless as the car got much louder. Lol Share this post Link to post Share on other sites
rob275 1817 Report post Posted September 3, 2014 James trust me, its loud. Like louder than Jordans car lol Share this post Link to post Share on other sites
GT86Jay 202 Report post Posted September 3, 2014 The cobra is probably the loudest system. The cobra system, decated + non-resonated is definitely loud. I think we've heard them peak at 108dB before. I get 98db non-res with decanted front pipe. So I should imagine the cat back system non-res is quieter. Here is a video of mine the week i got it all fitted. It got a little more tame after a few miles on the system... https://www.youtube.com/watch?v=FyljbHml0pE Share this post Link to post Share on other sites
toyokid 27 Report post Posted September 9, 2014 Saw a couple of Cobra systems at Oulton Park in the paddock on the 86 day and thought they sounded fruity at tickover and low revs Sent from my iPhone using Tapatalk Share this post Link to post Share on other sites
toyokid 27 Report post Posted September 17, 2014 just picked up a HKS system, this will be fitted next month when I have an Ecutek to reduce start up retard, rest of the system is 2.5" over pipe and 2.5" resonated 2nd cat replacement. I will provide feedback. Stephen Mine was noise tested at Croft last weekend, at 5,250rpm she was under 95db Share this post Link to post Share on other sites
Special K 442 Report post Posted September 17, 2014 My 3" AVO system (no exhaust manifold cats, replacement hi-flow second cat) was tested at Snet (87db) and at Croft (83db) I shall be trying a prototype AVO mid pipe with a resonator shortly... should make a difference, as at the moment it does get progressively louder on track as the welly goes down.. As I mentioned in another thread, noise is now a headline issue at a number of circuits.. what is acceptable on the road is no longer guaranteed to be acceptable at Snet, Croft, Rockingham, Mallory, etc. Spec K Share this post Link to post Share on other sites
Riceburner 284 Report post Posted September 17, 2014 I have bought a muzzle from JP exhausts which bolts on the tailpipe so i should be ok for the next round. Doesnt look very pretty & sticks out a bit but does the job. Share this post Link to post Share on other sites
Lauren 2259 Report post Posted September 17, 2014 What is the noise limit at Rockingham going to be? Mine is at 93db so guessing it will be okay. Share this post Link to post Share on other sites
Jamie_GRMN 177 Report post Posted September 17, 2014 Rockingham is going to be another 102db limit... I managed to get 98db at Snet and 99 at Croft... hope they don't lower the Rockingham one now Not as loud as Pitman with 101.8db though and a request to change the exhaust if he's going to do another round Share this post Link to post Share on other sites
Riceburner 284 Report post Posted September 17, 2014 The key is what the car is on driveby.When they tested mine static at 5,500 rpm it was 89 dbs and yet i was told twice by the javelin marshal that i would not be allowed to continue in the events with the excessive noise developed on driveby.Apparently the meter was at the end of the first straight where i had to select 2nd and full load to pull me round the complx of chicanes, thats where the complaints were coming from. I kick myself for not enquiring what actually the reading was though. Share this post Link to post Share on other sites
Ade 517 Report post Posted November 18, 2016 I know this is an old thread but does anyone know the dB level of the stock exhaust using the rac blue book noise test (I.e. trackday test)? Share this post Link to post Share on other sites
Rich 378 Report post Posted November 18, 2016 Mine was clocked at 78 dB at Bedford. Share this post Link to post Share on other sites
Mike 458 Report post Posted November 18, 2016 I got told 86 dB at Cadwell last year which was clearly wrong... mid to high 70s sounds right Share this post Link to post Share on other sites
rob275 1817 Report post Posted November 18, 2016 Deffo isn't 86, my milltek is 86. I think when I had my OEM on it was 78 Sent from my ONE E1003 using Tapatalk Share this post Link to post Share on other sites
