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Engine, Exhaust, Transmission Discuss the FR-S | 86 | BRZ engine, exhaust and drivetrain. |
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04-13-2014, 01:22 AM | #1 |
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Open Flash Header - Sound and Performance Comparison
Sojhinn and I met up today to have a little fun.
We both have virtually the same setup except he does not have an Open Flash Header (OFH) and I do. Besides that..Sojhinn and I both have the Phantom ESC, OFT, High Flow Secondary CAT and Nvidia Q300 Exhaust. Sojhinn has a Manual, I have an Automatic I brought my new GoPro along and we recorded some comparisons to show the difference in sound and performance the OFH makes. Note: No laws were broken making these videos despite how it may look Don't forget to change the youtube settings to 720p! [ame="http://youtu.be/ZPhLjCnB34Q"]Sound Comparison[/ame] [ame="http://youtu.be/jnFH4oPutR4"]Performance Comparison[/ame]
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04-13-2014, 01:51 AM | #2 |
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Love the sound comparison. I can't wait to pair my OFH with my Lachute Catback. Sound is going to be nuts and the dip will finally be a thing of the past!
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04-13-2014, 02:30 AM | #3 |
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Spectacular comparison video, my friend! How's the Cold Start with the OFH, as well as the daily drivable aspect of the car- too drony? It'd be nice if there was a drive by video/sound clip!
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04-13-2014, 02:30 AM | #4 |
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Great job on the vids and making a good sound comparison!
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04-13-2014, 08:44 AM | #5 |
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I spy, silver FR-S going opposite direction. Second vid 0.06 sec mark.
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04-13-2014, 11:03 AM | #6 | |
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Quote:
Cold start is pretty loud for me but I also have an Ally Garage. The sound just bounces everywhere. I'll try to snag a db measured video of that today. No drone whatsoever. I'm really happy with that.
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04-13-2014, 11:24 AM | #7 | |
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Quote:
Yeah. While driving around in the passenger side it was noticeably louder but no drone or rasp. It sounded awesome but it's definitely louder.
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04-13-2014, 10:21 PM | #8 |
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Here's a video with DB recordings
-Cold Start -Idle -2,000 RPM Throttle -3,000 RPM Throttle -4,000 RPM Throttle -4,000 RPM Blip -6,000 RPM Blip -Drive Off [ame]http://youtu.be/YFhbgGXqOoE[/ame] Here is the video I did before the OFH install. The distances and exact locations were different so the DB ratings can't really be compared one for one unfortunately. [ame="https://www.youtube.com/watch?feature=player_embedded&v=Ztt6vhU7Y7Q"]Sound Test - Pre OFH - YouTube[/ame]
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04-13-2014, 10:48 PM | #9 |
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That video, is amazing. We need more of these DB tests while sound differs between videos etc the DB will vary much less when testing loudness!
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04-13-2014, 11:06 PM | #10 | |
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Quote:
db meter taken at 10 cm = 90db 20cm = 84db 40cm = 78db 80cm = 72db 1.6m = 68db it's a logarithmic scale, so perception of distance to sound is not proportionate. that being said, @nlowell DB rating is likely an accurate comparison. If I was 1m away originally, and 1.6m away after.. then you're looking at maybe a 3-4db difference (lower in OFH video) anyways, here's mine [ame="https://www.youtube.com/watch?v=AKx_yEStvXg"]FR-S BRZ OpenFlash UEL Catless Header - YouTube[/ame] This was about 15 miles after head install. It is a bit quieter now.
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04-13-2014, 11:16 PM | #11 |
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Agree - took the video in a hurry. Should have re-watched the first to make sure I was at the same distance. For a comparison, the DB on the OFH is probably off 6-10dp compared to the the pre-OFH.
The video in my first post is better for a before and after header comparison since it was shot on the same location on the cars and the cars drove the same path.
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04-13-2014, 11:53 PM | #12 |
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still waiting for someone with a OFH & perrin catback :/
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04-14-2014, 12:13 AM | #13 |
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Can anyone chime in about any smells from the header?
Ive driven behind a friend with the borla UEL catless, and I got nauseous from it after a little back |
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