Author Topic: Slip ons - manufacturer claims  (Read 3741 times)

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Offline Steve in Sunny Fla

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Slip ons - manufacturer claims
« on: January 08, 2018, 03:35:36 pm »
    It's a fact that almost every c-14 ends up with a slip on muffler.  I have a record of every flash I've done, and by a huge margin, slip ons outnumber stock mufflers. You see it when you go to COG rides or rallies. The question of "how much power do you get from a slip on" is constantly asked of me, and in fact this thread was suggested to me by another owner.

   Let's first look at manufacturers claims. I'm ordering these by cost, most expensive to least expensive.

1) Akropovic ..............5.2 hp..................879.00 (revzilla, no manufacturer cost listed)

2) Two brothers.........4.4 hp...................575.00 (manufacturer price)

3) Vance/Hines CS1..N/A.......................480.00 (manufacturer price)

4) Area p.....................5.62 hp.................450-465.00 (manufacturer price)

5) delkevic...................6.0 hp...................220-279.00  (manufacturer price)

 Although I didn't see it, I'm sure all testing was done with the decibel silencers out. I can assure you that any of the DB killers are power killers also.

  My dyno time with the area p slip on yielded a modest 3 hp gain with the stock tune.  My testing proves that there is no need to consider "richening up" the concours fuel mixture with a slip on, the flow isn't significant enough to need it.

  As always, keep in mind that if any manufacturer or store is making outlandish power claims associated with slip ons you might want to look at that a little closer  ::) 

  Steve

   http://www.akrapovic.com/#!/motorcycle/product/road/15122/technical?brandId=31&modelId=682&yearId=4498

   https://www.twobros.com/products/2008-2015-concourse-14-m5-black-titanium-part-number-005-1920420v-b

    https://products.vanceandhines.com/store/kawasaki/33511/

    http://www.areapnolimits.com/products/Slip-On-Exhaust-Kawasaki-Concours-14-2008.php

     http://www.delkevic.us/index.php?route=product/product&path=120460_122058_122739_122753&product_id=2572
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Offline JPlug

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Re: Slip ons - manufacturer claims
« Reply #1 on: January 08, 2018, 08:11:43 pm »
It seems like a slip-on is a waste of money unless you want to spend a lot only for looks and less weight.

Offline Bud

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Re: Slip ons - manufacturer claims
« Reply #2 on: January 08, 2018, 08:28:49 pm »
It seems like a slip-on is a waste of money unless you want to spend a lot only for looks and less weight.
They don't call the stock muffler a "potato launcher" for nothing!  That thing is huge! :D

Offline Rob9876

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Re: Slip ons - manufacturer claims
« Reply #3 on: January 08, 2018, 08:32:27 pm »
. . . My testing proves that there is no need to consider "richening up" the concours fuel mixture with a slip on, the flow isn't significant enough to need it.
For the mechanically ignorant, like me, does that mean that it's not necessary to map/flash, etc. if you add one of these slip-ons (just slip it on)?

Offline Steve in Sunny Fla

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Re: Slip ons - manufacturer claims
« Reply #4 on: January 08, 2018, 08:34:40 pm »
. . . My testing proves that there is no need to consider "richening up" the concours fuel mixture with a slip on, the flow isn't significant enough to need it.
For the mechanically ignorant, like me, does that mean that it's not necessary to map/flash, etc. if you add one of these slip-ons (just slip it on)?

that's correct. Steve
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Offline Rob9876

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Re: Slip ons - manufacturer claims
« Reply #5 on: January 08, 2018, 08:37:18 pm »
that's correct. Steve
Thanks for the quick reply Steve!

Offline Buzzard

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Re: Slip ons - manufacturer claims
« Reply #6 on: January 08, 2018, 09:00:35 pm »
Good and accurate info from SISF as usual.
My decision to change exhaust was for strictly non-performance reasons.
The C-14 has more than enough power for me in OEM condition.
I chose the 18" Delkevic SS Oval based on looks alone.
Being able to hear a little more C-14 engine music is a bonus. :beerchug:

Now if will only warm up above freezing I'll get out and ride some.
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Offline rcannon409

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Re: Slip ons - manufacturer claims
« Reply #7 on: January 08, 2018, 09:13:44 pm »
If you ever had the oportunity, it would be cool to see how badly an insert does reduce power.   Power is nice, and quiet is nice.  I wish both were an option.

Are you thinking -5%?  -10%......just curious as to how bad the inserts are....nothing else.
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Offline seagiant1

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Re: Slip ons - manufacturer claims
« Reply #8 on: January 08, 2018, 09:50:47 pm »
It seems like a slip-on is a waste of money unless you want to spend a lot only for looks and less weight.

Hi,
       I could NOT take that "Potato Launcher"! :(

Any other good from it, is just a bonus! ;D

Looks like my Delkelvic 18" Oval CF came out of the pack pretty good! :great:

Thanks Steve! :motonoises:
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Offline d04011

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Re: Slip ons - manufacturer claims
« Reply #9 on: January 08, 2018, 11:13:43 pm »
Besides the significant weight savings and much better looks, it's also nice to have a decent sound loud enough that I don't have to look at the tach to see if my C-14 is actually running when other bikes with aftermarket exhausts nearby are idling...

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Offline cuda

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Re: Slip ons - manufacturer claims
« Reply #10 on: January 09, 2018, 01:53:03 am »
If you ever had the oportunity, it would be cool to see how badly an insert does reduce power.   Power is nice, and quiet is nice.  I wish both were an option.

Sure ... always options a  Turbo will quiet things

Spray will give you more ponies  cheap
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Offline Lurch71

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Re: Slip ons - manufacturer claims
« Reply #11 on: January 09, 2018, 03:19:09 am »
Anybody have any positive feedback on the Area P slip on.  Their shop is about 10 minutes from me here in SoCal.

Offline connie_rider

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Re: Slip ons - manufacturer claims
« Reply #12 on: January 09, 2018, 03:21:02 am »
I have an Area P. {Carbon Fiber}
Different tone {a bit quitter} than the Two Brothers and CS-1's I've been around.
Love it..

Ride safe, Ted
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Offline Lurch71

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Re: Slip ons - manufacturer claims
« Reply #13 on: January 09, 2018, 03:29:05 am »
I have an Area P. {Carbon Fiber}
Different tone {a bit quitter} than the Two Brothers I've been around.
Love it..

Ride safe, Ted

Thanks Ted

Offline ghostrider990

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Re: Slip ons - manufacturer claims
« Reply #14 on: January 09, 2018, 11:53:04 am »
I ran my Db Killer Inserts in my Dual Akra's for quite a few miles.....on stock tune, not with Steve's Flash.

However, my Butt Dyno would tell me that the power reduction is more in the 10-15% reduction zone, because I could REALLY feel it in certain areas of the powerband.

needless to say, those are out, and they're NEVER coming back!

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Offline Zarticus

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Re: Slip ons - manufacturer claims
« Reply #15 on: January 09, 2018, 12:39:29 pm »
I have run the Db killer in my CS1 & there is almost no noticeable sound reduction, I could not really notice any performance difference with it in or out either. I now run without it since it seems to do NOTHING.
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Offline Steve in Sunny Fla

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Re: Slip ons - manufacturer claims
« Reply #16 on: January 09, 2018, 02:00:48 pm »
I have run the Db killer in my CS1 & there is almost no noticeable sound reduction, I could not really notice any performance difference with it in or out either. I now run without it since it seems to do NOTHING.

Gary - i'm waiting on all my new hardware / software for my dyno upgrades now. when it's on the dyno, bring your bike down with the DB killer and we'll do some WOT runs to compare and see what effect the db killer is having. Steve
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Offline ron203

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Re: Slip ons - manufacturer claims
« Reply #17 on: January 09, 2018, 02:20:40 pm »
 :popcorncouple:
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Offline rcannon409

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Re: Slip ons - manufacturer claims
« Reply #18 on: January 09, 2018, 04:29:37 pm »
Have you guys ever ridden,on your own bike, as a passenger?  Thats where i noticed the noise, without an insert.....but- 15%?   Maybe its time for good earplugs, instead?
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Offline turbojoe78_MA

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Re: Slip ons - manufacturer claims
« Reply #19 on: January 09, 2018, 05:21:06 pm »
Here are the dyno charts of my bike going from stock exhaust, to a 18" CF Delkevic.

These runs were done right after each other, bike never left the dyno.
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Offline Steve in Sunny Fla

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Re: Slip ons - manufacturer claims
« Reply #20 on: January 09, 2018, 05:59:02 pm »
Here are the dyno charts of my bike going from stock exhaust, to a 18" CF Delkevic.

These runs were done right after each other, bike never left the dyno.

so it LOST 1 hp with the DB killer, and GAINED 3.6 hp with the slip on open.  :great:  Thanks for posting that Joe! Steve
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Offline Doc

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Re: Slip ons - manufacturer claims
« Reply #21 on: January 09, 2018, 07:47:28 pm »
Installed an Area-P slip-on on my '12 last year based on looks and sound alone - no concern about horsepower increase.  The carbon fibre looks great - totally changes the bike's looks - much more sleek and sporty.  The customer service from Kerry at Area-P is fantastic.  That, combined with Steve's MR flash, and I am golden!

Offline seagiant1

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Re: Slip ons - manufacturer claims
« Reply #22 on: January 09, 2018, 08:14:02 pm »
Hi,
      Thanks TurboJoe! ;D

Good to see it on the chart! :great:

I have the same slip on and love it!!! >:D >:D >:D
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Offline Pilgrim

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Re: Slip ons - manufacturer claims
« Reply #23 on: January 09, 2018, 09:10:22 pm »
Here are the dyno charts of my bike going from stock exhaust, to a 18" CF Delkevic.

These runs were done right after each other, bike never left the dyno.

I also have the Delk 18" CF and like it.   It goes well on the black bike. 

With the silencer in, you'll get more miles per gallon (if fuel efficiency matters to you).

With the silencer out, you'll get more smiles per gallon!     :motonoises:
   

Offline rcannon409

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Re: Slip ons - manufacturer claims
« Reply #24 on: January 09, 2018, 09:45:40 pm »
That brings up another question about the db killers, themselves. 

In the case of the 18" delk, the db killer does not appear to hurt it , THAT badly, but I wonder about other systems?

Somehow, I ended up with four Leo Vince exhaust systems. One was on a Suzuki DR350 dirt bike. System two is on an SV650. System three is on a ninja 1000, and system four is my concours 14.

All four systems share the identical db killer?????  Same diameter, same length.  Obviously, theres been huge amounts of engineering in their db killers for each specific bike, or someone just had to build something....

The exhaust systems really have nothing in common as far as length, diameter, shape, etc. other than that same db killer fitting.




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