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[DennisG]

I have had these Hi outputs for a while and I have had a love hate relationship of sorts with them.  I bought them and had them installed with a set of power duals header pipes and a dyno tune.  The bike ran real good.   Not great throttle response but like a rocket above 3500 rpm.

I didn't really dig the sound initially.  very deep and a bit muffled or hollow and I wanted a bit more crack to the sound. It seemed to get a bit better with time though.

But the bike seemed to be tuning itself out.    Reloaded map, ran good again.    Also, there was a chattering sound near the throttle body with those mufflers that was mentioned by another guy in another thread and when I heard him say that, I identified immediately.  I thought it was an exhaust leak or an intake leak at first.  


So, I took them off and put a pair of Basic slip ons on there that were on the bike when I got it.  The chattering sound went away.  I liked the sound better but the tune didn't match real well and I tried a few V tuning runs, my first ever but I think it still ran better with the original dyno map.  mostly due to my inexperience with the V tune I am sure.

So after about a week and a half with the basics, I decided to put the Hi Output back in since they matched the tune better. .  When I ordered them I also got the quiet baffles because I was afraid that they would be too loud and I almost had him tune with them both in and out. They were only like 23 bucks a piece.

 But the mufflers weren't very loud really so I never tried the Quiet baffles.  So just for an experiment, I decided to put the quiet baffles in today before I mounted the high outputs back on.  

Some things I noted when I pulled the baffles:  These hi outputs have the 1 3/4 inch  neck but then they are 3 inch baffle for about halfway then they increase to like 3 1/4 or 3 1/2 inch.  No wonder there is no back pressure and throttle response.

 So I put the quiets in there which are basically like plugs on the end, mounted them  on the bike and started it up.  Definitely quieter, can hear the radio better. no chatter.   Still very little crack.  Don't sound as Bad A$$ as the basics or for that matter the Hi Outputs without quiet baffle.  My BSR likes them a bit more aggressive as well.  

But you know what?  The throttle response increased TREMENDOUSLY!  The bike screams with those baffles in!! 100% improvement in performance.  I am only speculating and I am not an expert, but  I think it is possible that the O2  sensors are probably getting a better read now as well.  My sweetie, although she didn't like the sound as much as the basics which have a lot more crack and deep too, had to admit the difference in the zip that the bike has now is HUGE.  

So my point being, if you are running the Hi Outputs, and you are not entirely satisfied, but don't want to spend large money on something else right now I would suggest putting the quiet baffles in them.  Cheap investment, and an amazing gain in performance.  .  If you like things a bit quieter, they wont hurt either.

Dennis

[geezerglide]

I have had my V&H Hi Outputs on for about a month, this last week end put on over 1,000 mile. What I noticed on Sunday end of trip they are getting louder. Also, I found I did not like the continuous what sounded like thump, thump throughout the ride. Was thinking of changing out Baffles, how do you know what baffles are in the mufflers?

Does anyone know if Fullsac has baffles for the V&H Hi Output Slip Ons?

geezerglide

[DennisG]

I doubt if Fullsac has any baffles for these, they are very unique.  The quiet baffles do not replace the original baffles, they are just added to the end.  You take the originals out, take the caps off and  and slide the quiet baffles into the originals and put in one screw. and put everything back together.

You Can do it with the mufflers on the bike.  You only have to slide the baffles out partway.

The quiet baffles get rid of that thumping sound which is too much low midrange frequency and rather irritating.  I think they sound better with the baffles in, a more balanced tone, but they are quieter and don't have much crack.  But not annoying at all, and when you grab the throttle, you are gonna enjoy that more!  

you can see them here

http://www.motorcycle-superstore.com/3/13/118/31046/ITEM/Vance---Hines-Optional-Quiet-Baffle.aspx?SiteID=CSE_Gbase_31046&WT.mc_ID=80003&zmam=88421133&zmas=1&zmac=45&zmap=31046

 I may try to find something that has more crack and a bit louder with no more than 2 in baffles for throttle response like Rinehart 4 inch, but in the meantime, I am going to enjoy the performance increase of the quiet baffle installation. The best the bike has ever run.  

[North Star]

I'm surprised that just a baffle change can actually make a noticable seat of the pants difference.

[scotr]

do you still have your basic slips

[DennisG]

I do.

[scotr]

interested in parting with them

[DennisG]

Here is a youtube of the Hi Outputs with quiet baffle inserts.     I had it backed up to the garage again which may be making it sound deeper than it does in open space, but I wanted it to be the same as the vid without the baffle inserts so a good comparison could be made.



Here is the one without the baffles:

[DavidB]

Sounded like a train horn.

[DennisG]

Those are my new Vance and Horns pipes!!     (accidentally hit the horn button instead of the starter!!) 

[scotr]

Are you interested in selling the basic slips?

[DennisG]

Are you interested in selling the basic slips?

hanging on to them for the moment.  what do you think a fair price would be?

Dennis

[laylonlor]

i'm runnig the v/h power dauls and hi outputs, i like them but wish they were a little louder, has anyone tried   shortening the baffles to make the have more crack

[DennisG]

i'm runnig the v/h power dauls and hi outputs, i like them but wish they were a little louder, has anyone tried   shortening the baffles to make the have more crack

If you take them out and look at them, they are rather unique.  Right after the 1 3/4 inch neck, they go to 3 inch opening and then get larger halfway down.  They have about a half inch of insulating material between the baffle screen and the outer surface of the muffler.  I am not sure that just cutting the screen is going to increase the crack without removing some of the insulating material as well. The tech at VH told me they do not recommend removing any of the insulating material because the outer surface of the mufflers will discolor if they come in direct contact with the hot exhaust gases. 

They do have a very muted muffled sound.  I think they are actually pretty loud but it is all bass and no treble.  I like the sound better with the quiet baffles in as it seems more balanced but it is definitely not as loud that way. 


Another interesting update....  I put my lowers back on yesterday as cool weather is coming and the fact that the lower is now in front of the SE Heavy breather has changed the way it runs again!  Less air able to enter it as speed increases.  Not quite as frisky! 

[bbrown]

Anyone know how big a difference Power Duals versus the True duals work as far a performance???