Can be a cam too loud?
Seasoned HDF Member
Joined: Dec 2005
Posts: 5,465
Likes: 625
The reason most aftermarket cams perform so well (especially low end cams) is they close the intake sooner than stock cams. This builds cylinder pressure which helps low end torque. The tradeoff for this is usually a but louder exhaust note compared to a stock cam. I would get a cam that satisfies you from a performance aspect, then adjust the exhaust with baffles or mufflers to dial it in.
Zach
Zach
Road Master
Joined: Oct 2008
Posts: 842
Likes: 284
From: UK
I know that my request is very unusual.
but i am a perfectionist and would like something that fits my bike and style exactly.
when i close my eyes and listen to my bike, i don't imagine an oldschool bobber.
I have written to fuel moto.
i'm currently wavering between the se447 (i'm afraid it will be too close to the stock sound) and the zippers 468 (i'm afraid it will be too loud again).
but i am a perfectionist and would like something that fits my bike and style exactly.
when i close my eyes and listen to my bike, i don't imagine an oldschool bobber.
I have written to fuel moto.
i'm currently wavering between the se447 (i'm afraid it will be too close to the stock sound) and the zippers 468 (i'm afraid it will be too loud again).
Road Master
Joined: Jul 2021
Posts: 1,142
Likes: 2,753
From: England
Consider getting a cam that performs how you want, then adjusting your exhaust to get the sound level you want.
That is what I did with mine...check out the video below-
https://www.youtube.com/watch?v=b6Ie1rZIxr8
That is what I did with mine...check out the video below-
https://www.youtube.com/watch?v=b6Ie1rZIxr8
Toning down the cam profile to reduce detonation noise levels is self-defeating. You might as well leave it as it is.
Grand HDF Member
Joined: Jul 2007
Posts: 3,741
Likes: 8,539
From: Bates County MO
Cam timing on the exhaust side can affect how "loud" an exhaust seems- the earlier the exhaust valve opens, the greater the pressure blow down, with increased sound. Exhaust open timing on a cam card is the # of degrees before bottom dead center (BBDC) the valve is pushed open .050" off the seat- the closer that number is to 0, the less pressure exists in the chamber when the valve is open. 0 would be the quietest, with the least performance.
Stock M8 cam (107/114) has the exhaust valve .050" off the seat @ 33° BBDC. Fairly quiet, but stock performance.
SE447 has the exhaust valve .050" off the seat @ 42° BBDC. Fairly quiet, mildly better than stock performance.
Star 30/30 has the exhaust valve .050" off the seat by 48° BBDC. Little louder, better performance.
Same direction with the CR cam-.050" off the seat by 57°, so louder still, better performance.
To quiet the exhaust, while still gaining better than stock performance, look at all the M8 "bolt in" cams, and see where their #s are.
Redshift 468 (@ 35.5°) may fit the bill.
Stock M8 cam (107/114) has the exhaust valve .050" off the seat @ 33° BBDC. Fairly quiet, but stock performance.
SE447 has the exhaust valve .050" off the seat @ 42° BBDC. Fairly quiet, mildly better than stock performance.
Star 30/30 has the exhaust valve .050" off the seat by 48° BBDC. Little louder, better performance.
Same direction with the CR cam-.050" off the seat by 57°, so louder still, better performance.
To quiet the exhaust, while still gaining better than stock performance, look at all the M8 "bolt in" cams, and see where their #s are.
Redshift 468 (@ 35.5°) may fit the bill.
Thread Starter
|
Novice
Joined: Jul 2024
Posts: 16
Likes: 2
From: Spain
Thanks for all the answers and help!
Unfortunately, it's not so easy with the exhaust system in my country. The current exhaust system is the best known, the loudest and the least likely to make anyone think I've modified the engine.
If it were easier, I wouldn't be so crazy. :/
@rigidthumper thanks for the explanation, that all sounds very interesting and would fit with my perception of the camshafts. But according to the specifications, that would mean that the Redshift 468 is quieter than the Se447, wouldn't it? I have heard both in real life and would have said that the Redshift is significantly louder.
and where do u find these information? I dont find this for all cams, e.g. Cr483.
Unfortunately, it's not so easy with the exhaust system in my country. The current exhaust system is the best known, the loudest and the least likely to make anyone think I've modified the engine.
If it were easier, I wouldn't be so crazy. :/
@rigidthumper thanks for the explanation, that all sounds very interesting and would fit with my perception of the camshafts. But according to the specifications, that would mean that the Redshift 468 is quieter than the Se447, wouldn't it? I have heard both in real life and would have said that the Redshift is significantly louder.
and where do u find these information? I dont find this for all cams, e.g. Cr483.
Last edited by ninja_defuser; Jul 14, 2024 at 03:41 PM.
Club Member
Joined: Jun 2024
Posts: 414
Likes: 602
From: Florida
Shopping like you
Hey guys,
I'm currently trying to find the right cam for me and have already tried a few things, but would like some tips or opinions from others.
i'm riding a 2019 softail with the 107 engine and a 2in2 exhaust system from jekyll.
i first had the star 30 30 in it and then the cr483. Unfortunately, both are too loud and too bright or garish for my taste.
i'm looking for a cam that has a nice idle sound, isn't as extremely loud as the other two and is more of an "old school" bobber.
it should be for the range from low to medium.
i would be very happy to receive a few answers because i want to save myself the trouble of having to replace a new one 3 times.
many thanks!
I'm currently trying to find the right cam for me and have already tried a few things, but would like some tips or opinions from others.
i'm riding a 2019 softail with the 107 engine and a 2in2 exhaust system from jekyll.
i first had the star 30 30 in it and then the cr483. Unfortunately, both are too loud and too bright or garish for my taste.
i'm looking for a cam that has a nice idle sound, isn't as extremely loud as the other two and is more of an "old school" bobber.
it should be for the range from low to medium.
i would be very happy to receive a few answers because i want to save myself the trouble of having to replace a new one 3 times.
many thanks!
My cam selection criteria has been moved to the 465'sh area. I've been looking at any dyno charts and reviews for smaller cams to figure out where I want to go on my M8 FatBoy. My criteria, right now, is an early (2k RPM) high torque number with a broad flat torque curve that will make the bike quick while riding and touring. My riding time with the bike at 5k + RPM will be very limited.
Maybe look at some of the older Moonshine HD cam shootouts vids on YouTube. They include dyno charts and some dyno video for the cams they were testing.
Good luck finding your cam.
Thread Starter
|
Novice
Joined: Jul 2024
Posts: 16
Likes: 2
From: Spain
I also got the feedback that the bike was too loud on the CR483. We had a longer tour and nobody wanted to ride behind me because it was so annoying. But it's due to the bright sound.
As already mentioned, replacing the exhaust is unfortunately not an option.
After many videos and discussions, I'm wavering between the SE447 and the TTS100. Whereby the TTS100 is probably the winner.
Does anyone have the cam and can tell me something specifically about the difference to the Star 30 30 or CR483? Especially regarding the key.
Thank you very much!
As already mentioned, replacing the exhaust is unfortunately not an option.
After many videos and discussions, I'm wavering between the SE447 and the TTS100. Whereby the TTS100 is probably the winner.
Does anyone have the cam and can tell me something specifically about the difference to the Star 30 30 or CR483? Especially regarding the key.
Thank you very much!
Grand HDF Member
Joined: Sep 2022
Posts: 4,476
Likes: 3,860
From: Florida
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I also got the feedback that the bike was too loud on the CR483. We had a longer tour and nobody wanted to ride behind me because it was so annoying. But it's due to the bright sound.
As already mentioned, replacing the exhaust is unfortunately not an option.
After many videos and discussions, I'm wavering between the SE447 and the TTS100. Whereby the TTS100 is probably the winner.
Does anyone have the cam and can tell me something specifically about the difference to the Star 30 30 or CR483? Especially regarding the key.
Thank you very much!
As already mentioned, replacing the exhaust is unfortunately not an option.
After many videos and discussions, I'm wavering between the SE447 and the TTS100. Whereby the TTS100 is probably the winner.
Does anyone have the cam and can tell me something specifically about the difference to the Star 30 30 or CR483? Especially regarding the key.
Thank you very much!
Last edited by $tonecold; Jul 17, 2024 at 07:52 AM.
