Pani R - homologated exh too damn loud.
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- Joined
- Apr 17, 2013
- Messages
- 2,186
- Location
- Spanaway, Wa
Looking good. That race bellypan should close up that bottom nicely.
- Joined
- Oct 22, 2016
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- Australia
Have you a photo of underneath where the headers join ?
Ok gents, a quick follow up after some track time.
Have just done 2 days at the track where I was black flagged with the standard system, and am pleased to say that,
with db killers fitted at least, I had no problems with noise. A friend on the circuit noise monitoring said that while I was ok,
I didn't have enough buffer to run without the killers. As I haven't mapped for straight through yet, we didn't pursue a full open test.
The bike does feel a touch different with respect to the power rush that used to come in like a hammer just above 9000 rpm,
in that it seems to be more of a linear progression starting much earlier in the rev range. As far as balance of the bike is concerned,
I have changed no suspension settings as nothing feels any different.
As a testimony to this, I ran several laps equal to my previous PB from last season.
A nice side effect of the system is that it seems to allow for much better heat dissipation.
Normally I would expect engine temps to be anywhere between 97 and 102 degs C when coming back from laps.
During the 2 days, the highest I noted was 92 degs C. Obviously the catalysed cans keep a lot of heat close to the engine, but also there
are not a great deal of airflow possibilities in the compact design. Now the whole underbelly is far more spacious. I intend to fit a closed
pan extension with oil catch over the summer, so it will be interesting to note if this pushes the engine temp back up significantly.
As a heads up, my bike previously had the standard ducati tune for the homologated akras, along with a rapidbike evo
module which had run on self learn alone (no custom map). As you will see from the initial/final dyno comparisons,
the system+killers would not have run very well without tuning.
I will be going for an open pipe tune over the summer and will run it back to back on the same day with the killers fitted,
to illustrate how much difference there will be.
Overall I am really happy with the results. The looks are already growing on me and the price of the full system was less than the DP akra race cans alone.
Even though the headers/manifold are probably heavier inch for inch, the fitted system still ends up a little less than the original due to junking cans/cats
and also the flapper valve and control motor.
Have just done 2 days at the track where I was black flagged with the standard system, and am pleased to say that,
with db killers fitted at least, I had no problems with noise. A friend on the circuit noise monitoring said that while I was ok,
I didn't have enough buffer to run without the killers. As I haven't mapped for straight through yet, we didn't pursue a full open test.
The bike does feel a touch different with respect to the power rush that used to come in like a hammer just above 9000 rpm,
in that it seems to be more of a linear progression starting much earlier in the rev range. As far as balance of the bike is concerned,
I have changed no suspension settings as nothing feels any different.
As a testimony to this, I ran several laps equal to my previous PB from last season.
A nice side effect of the system is that it seems to allow for much better heat dissipation.
Normally I would expect engine temps to be anywhere between 97 and 102 degs C when coming back from laps.
During the 2 days, the highest I noted was 92 degs C. Obviously the catalysed cans keep a lot of heat close to the engine, but also there
are not a great deal of airflow possibilities in the compact design. Now the whole underbelly is far more spacious. I intend to fit a closed
pan extension with oil catch over the summer, so it will be interesting to note if this pushes the engine temp back up significantly.
As a heads up, my bike previously had the standard ducati tune for the homologated akras, along with a rapidbike evo
module which had run on self learn alone (no custom map). As you will see from the initial/final dyno comparisons,
the system+killers would not have run very well without tuning.
I will be going for an open pipe tune over the summer and will run it back to back on the same day with the killers fitted,
to illustrate how much difference there will be.
Overall I am really happy with the results. The looks are already growing on me and the price of the full system was less than the DP akra race cans alone.
Even though the headers/manifold are probably heavier inch for inch, the fitted system still ends up a little less than the original due to junking cans/cats
and also the flapper valve and control motor.
- Joined
- Apr 17, 2013
- Messages
- 2,186
- Location
- Spanaway, Wa
Thanks for the feedback Glen. This looks to be the way I'll be heading myself if I decide I'm capable of racing again. I really don't want the hassle of having to remove the cans for tech inspection.
I haven't run it with them out yet, as its not mapped. They are in quite tight and need the cans unmounted to knock them out from inside, once the retaining bolts are removed.
Will get some static db readings when I go back to the dyno for the open pipe tune and compare.
Will get some static db readings when I go back to the dyno for the open pipe tune and compare.
- Joined
- Aug 9, 2013
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- 1,123
- Location
- Oregon
Another option is Storm Performance Fabrications. Look up their Facebook page. He's been working with some BSB teams in the past and has been coming out with a few variations on exhausts that are under the UK sound limits.
- Joined
- Sep 29, 2013
- Messages
- 1,147
- Location
- Chicago, IL
That looks sweet. Looks loud like the WSBK Akra.
Another option is Storm Performance Fabrications. Look up their Facebook page. He's been working with some BSB teams in the past and has been coming out with a few variations on exhausts that are under the UK sound limits.
- Joined
- May 18, 2014
- Messages
- 504
- Location
- London, UK
Good to see you went ok. Do you have a graph from without the DB killers? this is my biggest complaint because they take away so much power. I lost 10-15mph top speed at Spa and ended up switching to my S1000RR roadbike because of it.
- Joined
- Aug 9, 2013
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- 1,123
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- Oregon
Looks loud, but it passed the flyby test at Donnington. He has another version he's working on with 400mm cans that is even quieter. Some may remember when Hopper kept having DNF's due to broken headers on yhe Akrapovic exhaust two seasons ago in BSB. They finally ditched the Akra and showed up with an achingly gorgeous full system in inconel. Storm is who made that system. The team even posted on their FB page that the only reason they aren't running them this year was due to sponsorship agreements.
Not yet mate. My tuning guy will hopefully be able to squeeze me in within the next couple of weeks.
As I said though, I have ran times equal to my PB with the homologated system, so its as least as good as original now.
- Joined
- Sep 10, 2013
- Messages
- 1,393
- Location
- East England, UK
Was looking at the SL the other day and spied this
Notice the keyhole at the back of the seat? Guess these parts are available and would sort your access issue?
Mine is track only now so no hassle for the foreseeable.
Finally got the second dyno run with the open pipe tune and for the sake of a better comparison (same day ambients)
we ran another pull with the db killers fitted.(Originally I had approx 189hp, but this dropped 3hp for the new day barometrics).
As a reminder, this is with MWR filter and rapidbike evo.
Turns out that the system has a slightly better mid range with the killers fitted, with the open pipe winning after about 9200 rpm.
Total benefit of removing the killers is approx 7hp at the top end, so not a great deal unless the track is quite open with long straights.
The negative side removing the killers is the noise, which went from a 127db reading fitted, to "off my meter scale of 130db" with them removed,
when standing approx 3m from the back of the bike at 45 degs in the dyno area.
For me personally, I would rather run noise hassle free and maybe play a little with gearing at tracks where this would be of benefit.
Belly pan and oil catch are now on their way, so will update once they arrive.
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