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Old 03-20-2008   #1 (permalink)
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Sound recording of Tridents

Had the chance last week to borrow a small digital recorder from work so took the 05 Sprint on a favourite loop with the recorder in the net front pocket of a rucksack. The final recording was well over an hour and ~70MB. Knowing OnDs Commadore would probably blow a gasket downloading that I chopped the file into a few small chunks, mostly from the mountain road sections. The recorder still picked up a little wind noise, but overall the sound quality is better than I expected (but then I know next to nothing about digital sound files, sampling rates and so on). For anyone considering switching exhausts it might be worth a listen. Clips at: http://www.pedalbot.com/html/triumph...BikeSoundClips
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Old 03-20-2008   #2 (permalink)
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What a great webpage. I enjoyed the sound clips and pictures. Great job.
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Old 03-20-2008   #3 (permalink)
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Thanks for posting these sound files... best quality under differing conditions I've heard yet.

It has allowed me to position a new exhaust system at the bottom of my Farkle Procurement Priority List.
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Old 03-20-2008   #4 (permalink)
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Thanks!

flyingbiker,
Great work! I was most interested in your thoughts on fuel economy and the switch between the 18t vs 19t sprocket. (wonder if the engine is working that much harder from the starts w/ the 19t..CLB might be able to answer that one) Those pipes sound great! You did comment on the staining of the outboard pipes and airflow issues, can you post some pic's on that by chance? This is my next big mod so i'm very interested in your thoughts. (Money grows on tree's, right?)
JS
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Old 03-20-2008   #5 (permalink)
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Nice job with the recording there flyingbiker. There have been precious few decent sound recordings of the Tridents under load so thanks for that. Now I can't be certain by just the recording but it did sound to me like you were keeping the RPMs rather low; it sounded like a lot of time spent in the 3-5K range. I'm assuming that an 05 is fully broken in unless you picked up a late inventory straggler. Is there any reason why you didn't open her up a little more and get the full range of her torque curve? Or am I just not hearing the recording correctly?

p.s. It's not a commentary on your riding style or skills, just curious.
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Old 03-20-2008   #6 (permalink)
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Thx for the feedback. Wrt to 19T to 18T switch affecting mpg, there is a caveat that occurred to me after adding that part of the page - it's not an apples to apples comparison. From what I understand the speedo AND odometer pickup is such that switching to the 18T will have thrown off the accuracy of the odometer. All the data is based on the bike odometer, not a GPS - so I guess the miles covered between fill-ups is now actually slightly less than indicated - but by how much I've never tried to figure out. To your point I know I used to slip the clutch more in heavy traffic (especially when carrying a pillion) with the higher gearing, and in the tighter switchbacks I'd drop to first whereas now I can leave it in second for all but the tightest stuff. What all that adds up to in my mind is economy is not a deciding factor in the switch, as any change is barely measurable, but drivability is definitely improved. Like the exhaust it could inversely affect mpg just by virtue of the instant gratification twisting the throttle gives The only reason I'd switch back to 19T is for a very long freeway run, but that's not going to be happening.
As for the asymmetric staining, well I'd like to keep this thread alive so not sure I want to go there - would you believe I finally cleaned them a couple of weeks ago when doing the oil change, so they are all equally clean now. Maybe in a few weeks I'll have a sample to post...
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Old 03-20-2008   #7 (permalink)
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Trident audio.

Sounds good,sounds even better when connected to a stereo amp.I intend to do the same thing when my friend let's me borrow his digital recorder.
Nice website as well.
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Old 03-20-2008   #8 (permalink)
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Sweet

flyingbiker,
I'll keep my ear to the keyboard on this post and see how it develops.
JS
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Old 03-20-2008   #9 (permalink)
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Quote:
Originally Posted by denman13 View Post
Nice job with the recording there flyingbiker. There have been precious few decent sound recordings of the Tridents under load so thanks for that. Now I can't be certain by just the recording but it did sound to me like you were keeping the RPMs rather low; it sounded like a lot of time spent in the 3-5K range. I'm assuming that an 05 is fully broken in unless you picked up a late inventory straggler. Is there any reason why you didn't open her up a little more and get the full range of her torque curve? Or am I just not hearing the recording correctly?

p.s. It's not a commentary on your riding style or skills, just curious.
You're right - I picked the bike up new early in 05 so it's well broken in (although seemed to take a long time), and yes because of the torque nature of the engine I tend to bumble along around the 4000K range. I know you're not challenging my riding style, but it nevertheless is fair to say on faster mountain rides like this I don't haul on the brakes at every corner then yank the throttle on exit, but rather try to be very progressive (most of the decel you hear is without applying the brakes at all as I enter the corners). Gearing for the 4K to 5K range gives me the right kind of acceleration and engine braking for my style. I had to pass a few cars on Hwy 39 and think I caught at least one in the clip so it probably went up to ~6K there. There is a section of climbing where I'll sit in 2nd and repeatedly touch 6 to 7K (the clip labeled climb to GRR), but there's barely anything you could consider a straight so it's lot's of short bursts. When joining the freeway I merged with traffic doing 70-80mph, probably in 6th, but wound it out to 125 (indicated, not corrected by GPS) as I picked up the car pool (staying in 6th) before cruising along around 95. Not sure what revs that equated to.
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Old 03-20-2008   #10 (permalink)
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Wow! Thanks for assembling this site!

I dabble in digital audio editing and will be playing with your MP3's to try to clean them up.

I'll be in touch

I live in Riverside, we should get together sometime and find some twisties.

--Kory
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