Forgive me for insisting with this one... I posted the same text in an old thread, but maybe everybody is tired of it and not reading anymore. I would really appreciate your feedback about this
I have this QD exhaust in my 1100. I'm not a very big fan of loud pipes, so I kept the db-killer. But I had allways the impression that this db-killer could be very restrictive...Even though it is a straight open tube, it has only 26mm of ID... Can this create overpressure in the exhaust system? Thanks guys [You must be registered and logged in to see this image.]
Leave it in. Any performance gain will be so minimal as to be unnoticeable. It may [i]feel[i] faster because it's noisier but it won't be.
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JohnA GRiSO Capo
Posts : 763 Join date : 2015-01-13 Age : 67
Subject: Re: db-killer, yes or no? Fri Sep 23, 2022 3:47 am
What Pete said…… My MIVV pipe has about the same ID exhaust exit…. Runs great with a Beetle map
Matias Sfregiato
Posts : 409 Join date : 2021-08-19
Subject: Re: db-killer, yes or no? Fri Sep 23, 2022 3:57 am
Thanks guys. I will keep it in... It"s just because I had recently to repair exhaust leaks and I started thinking I could have too much pressure on the system.
Pete Roper GRiSO Capo
Posts : 10690 Join date : 2013-05-29 Age : 67
Subject: Re: db-killer, yes or no? Fri Sep 23, 2022 5:07 am
Exhaust physics is not simple.
I've given up arguing with the 'Loud Pipes' brigade. It's not worth the craic.
What Pete said. You need a PhD in Fluid Dynamics to truly understand exhaust gas flow. Your 26mm port is perfectly fine. The 29mm port in the exhaust of my 1400 GRiSO is fine.
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Converted Duc GRiSO Capo
Posts : 315 Join date : 2014-12-16 Age : 59
Subject: Re: db-killer, yes or no? Sat Sep 24, 2022 4:00 am
I have used the Mistral Hi with and without the db and also the Termi with and without. My thoughts are that yes I love the rumble but definitely feels flatter and uses more fuel with it out. I say leave it in.
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Matias Sfregiato
Posts : 409 Join date : 2021-08-19
Subject: Re: db-killer, yes or no? Sat Sep 24, 2022 7:31 am
We better get one of these : [You must be registered and logged in to see this link.]
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whitmire GRiSO Capo
Posts : 31 Join date : 2014-09-22 Age : 73
Subject: Re: db-killer, yes or no? Sat Oct 01, 2022 4:21 am
Hello Matias, Just saw your post this morning,best laugh I have had all week !!!
Matias Sfregiato
Posts : 409 Join date : 2021-08-19
Subject: Re: db-killer, yes or no? Sat Oct 01, 2022 5:24 am
Hi Whitmire, It's crazy, isn"t it? A touch of gasolina fragrance and it would be ...
Subject: db-killer, yes or no? 
Thu Sep 22, 2022 12:26 pm
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