| Fiesta-Si.com https://www.fiesta-si.com/forums/ |
|
| Blowy through the backbox after de-cat https://www.fiesta-si.com/forums/viewtopic.php?f=4&t=23035 |
Page 1 of 1 |
| Author: | - Danny Boy - [ Sun Sep 11, 2011 9:03 pm ] |
| Post subject: | Blowy through the backbox after de-cat |
As you may know I fitted a de-cat, all is well apart from it sounds blowy through the backbox if you know what I mean? Is this normal? I'll post a video tomorrow so you can hear what I mean. But it just sounds a bit rubbish  all the joints are sealed up and not blowing so I know it's not that
|
|
| Author: | Ry [ Sun Sep 11, 2011 9:16 pm ] |
| Post subject: | Re: Blowy through the backbox after de-cat |
Probably normal, it's all straight-through now so maybe it's come down to the fact that the exhaust bore size isn't right for your application? How does it sound driving along with a heavier foot? Most general N/A applications with 4 cylinders shouldn't need more than a 2.25" bore size - What exhaust system do you have? |
|
| Author: | happypaul [ Sun Sep 11, 2011 9:18 pm ] |
| Post subject: | Re: Blowy through the backbox after de-cat |
Decats sounds shite on a zetec lol |
|
| Author: | DarrenFsi [ Sun Sep 11, 2011 10:13 pm ] |
| Post subject: | Re: Blowy through the backbox after de-cat |
my decat has a silencer instead of the cat and sounds the biz |
|
| Author: | - Danny Boy - [ Sun Sep 11, 2011 10:22 pm ] |
| Post subject: | Re: Blowy through the backbox after de-cat |
It sounds more raspy now, before it was quite a nice deep noise. Not sure what size the exhaust is but i use 2 1/8th inch clamps lol |
|
| Author: | DANIELP1991 [ Mon Sep 12, 2011 10:28 pm ] |
| Post subject: | Re: Blowy through the backbox after de-cat |
raspy is the way!! when a car is de-catted it does make a funny sort of blowy noise. i just de-catted the ignis, the exhaust isnt blowing but you an hear the air passing through the exhaust sort of noise if you get me. fiesta and arosa were both the same... |
|
| Author: | - Danny Boy - [ Tue Sep 13, 2011 12:10 am ] |
| Post subject: | Re: Blowy through the backbox after de-cat |
Yeah I have had a few people tell me its normal lol. All is good 
|
|
| Author: | EvilDes [ Tue Sep 13, 2011 8:51 am ] |
| Post subject: | Re: Blowy through the backbox after de-cat |
Mine doesn't sound blowy 
|
|
| Author: | - Danny Boy - [ Tue Sep 13, 2011 9:08 am ] |
| Post subject: | Re: Blowy through the backbox after de-cat |
but you have the added extra of boost its only blowy when you blip the throttle when you are at stand still, apart from that it seems ok tbh |
|
| Author: | EvilDes [ Tue Sep 13, 2011 1:07 pm ] |
| Post subject: | Re: Blowy through the backbox after de-cat |
Yeah, it'll just be the reduction in back pressure now I imagine, so when you do put some gasses through it, it just sounds a bit piddly to start with
|
|
| Author: | Mouse [ Tue Sep 13, 2011 10:24 pm ] |
| Post subject: | Re: Blowy through the backbox after de-cat |
| Page 1 of 1 | All times are UTC [ DST ] |
| Powered by phpBB® Forum Software © phpBB Group https://www.phpbb.com/ |
|