Why I chose JunB.L exhaust, the complete review w/pics! (no 56k)
Apr 29, 2007 | 07:38 AM
#107
Currently-
Stock DP- JunBL 2.5" to 3" adapter- 3" JunBL testpipe- 3" JunBL Catback.
I plan on removing the testpipe and replacing with a HFC to reduce crusing noise and be a bit more environmentally friendly.
As I am keeping my stock downpipe, would it be possible to install a 3" HFC in this chain without hacking the flanges off the HFC and then adding v-bands? (I am assuming that a 3" HFC won't bolt up directly to the 2.5" stock DP.)
Thanks
Apr 29, 2007 | 07:54 AM
#108
i think the 3" HFC will bolt on the the stock downpipe but i'm not completely sure. then you can use the flange adapter to help bolt on the rest of the catback. well at least i hope it does because i will be looking at buying one.
Apr 29, 2007 | 08:06 AM
#109
)If I can go to from the stock DP right to the 3" HFC, then, as you said, all I'll need is the 3" flange to 3" v-band adapter and will be good to go.
Hopefully, that's the ticket...
Apr 30, 2007 | 03:21 PM
#114
May 3, 2007 | 04:41 AM
#115
Newbie
Joined: Jun 2003
Posts: 51
Likes: 0
This might help:
http://www.physicsclassroom.com/Class/sound/U11L2b.html
http://www.physicsclassroom.com/Class/sound/U11L2b.html
Sound testing is as follows:
Both cars were on winter/snow tires. I used a simple Radio Shack dB reader which is not state/federal approved although they do mention a margin of error from +/- 1-3% compared to the high-end devices that cost $1k+. All this was done with "C Weighting" which is closer to the human ear but WILL represent higher readings. All speed testing was done in-cabin with the windows up.
For instance the modded EVO at 70 mph with "A Weighting" would represent 79 db and the Stock EVO would represent 75 db at the same speed. "A Weighting" would represent a closer to real world number although I did not want to sugarcoat the results either.
Stock EVO9 with only the JunB.L catback system, no other mods that would affect sound.
60 mph = 95 db
70 mph = 96 db
80 mph = 97 db
Idle = 87 db
3k RPM constant = 97 db
Rev Limiter = 105-109 db
EVO8 with HKS 272's full downpipe, testpipe, open air filter, Invidia O2 housing, all stainless IC piping. Currently not tuned for this video.
60 mph = 96 db
70 mph = 98 db
80 mph = 98 db
Idle = 95 db
3k RPM constant = 104 db
Rev Limiter = 105-112 db
I was actually surprised at how similar the in-cabin of the 2 cars were. Videos will come very soon. Just need to spend some time editing those!
Both cars were on winter/snow tires. I used a simple Radio Shack dB reader which is not state/federal approved although they do mention a margin of error from +/- 1-3% compared to the high-end devices that cost $1k+. All this was done with "C Weighting" which is closer to the human ear but WILL represent higher readings. All speed testing was done in-cabin with the windows up.
For instance the modded EVO at 70 mph with "A Weighting" would represent 79 db and the Stock EVO would represent 75 db at the same speed. "A Weighting" would represent a closer to real world number although I did not want to sugarcoat the results either.
Stock EVO9 with only the JunB.L catback system, no other mods that would affect sound.
60 mph = 95 db
70 mph = 96 db
80 mph = 97 db
Idle = 87 db
3k RPM constant = 97 db
Rev Limiter = 105-109 db
EVO8 with HKS 272's full downpipe, testpipe, open air filter, Invidia O2 housing, all stainless IC piping. Currently not tuned for this video.
60 mph = 96 db
70 mph = 98 db
80 mph = 98 db
Idle = 95 db
3k RPM constant = 104 db
Rev Limiter = 105-112 db
I was actually surprised at how similar the in-cabin of the 2 cars were. Videos will come very soon. Just need to spend some time editing those!
May 26, 2007 | 01:48 PM
#119
So i spent atleast another 4 hours trying to re-adjust and reposition the exhaust. Same result. No change in the way it looks. Anyone know where I can get kartboy hangers for cheap?
