Pipe and Slippers (Bolt on Tuning)

[Belco100]

I have been looking into this since Christmas, and finally decided to get some bits to fit. So many pros and cons for different methods in the end I have got:

RR Air Scope + Remove the acoustic insert
Sprint Filter
IAT Relocation Kit
Handheld for Bren Tune Stage 2
Black Widow headers

My plan was to remove restrictions from front to back. I am a little worried about the exhaust noise and may have to put the baffle in the LeoVince can, which is a bit counter productive but the Police are getting hot in Essex and with noise cameras going up everywhere and across the continent I will give it a try.

Off to my local Dyno House on Saturday for a base run and then back again after all fitted in a couple of weeks time. I was only really after curing the low load throttle which is pretty horrible when filtering etc, but now hopping to flatten of the dip around 6,000 rpm. I am quite a lazy rider on the road, and Akrapovic show a 6hp improvement in this area, not sure if Black Widow are as good, but will find out 

[Winger]

You are treading a path i’m Not familiar with, but i’m Sure you’ll get a decent end result, we’re you’ll notice the difference is around 4250 we’re the TUV set the emissions and you’ll notice how the revs pick up, but for me it was the bottom end fuelling that raised a smile for me, I can ride in 6th too under 25mph and it’ll still pick up off the throttle without the slightest hesitation.

[herveyw]

Originally Posted by Belco100

...but the Police are getting hot in Essex...

Sounds like not much has changed in the last 25 years then 

[sak240]

Very interested as this is the exact package I am likely to put on my bike.  Are you able to show what the bike runs like without extra tuning with this package? (Ie just bolt all on, hit the dyno and go) I want to do this but can’t get any adjustments made afterwards.

Great job defiantly looking forward!

[Belco100]

Got to the Dyno House, all stock except the LeoVince end can which I had re-fitted the the baffle as I thought I would run it like that when I fit the Black Widow headers to keep the noise down. According to LeoVinces website it gives a slight power increase on a standard bike with the baffle in. What a shock, I was expecting it to be in the low 150s, not the low 140s - just 142hp 

Dyno guy suggested pulling the baffle out as it felt like it was gassing up, and straight into the 150s. The baffle was losing me 9hp!



What you can see is the big dip in power from 6 - 7,000rpm, which Akrpovic headers seem to fill in but will have to wait to see if Black Widow headers are anywhere near as good? And I may end up back with the standard can unless anyone has an Akra can going cheap?

 Interestingly, I had just read an article warning about baffles in "Race" cans https://bsd.uk.com/bike-brand-news/bmw/bmw-s1000xr-its-second-visit-to-get-the-power-commander-dialled-in-to-the-arrow-exhaust/  but wasn't expecting it to be so drastic.

Just for reference on my iPhone dB meter it recorded 84db at tickover 1M behind it and 107db revved to 7,000rpm 1M to the side.

And I done 10 runs on Harry's Dyno (iPhone App) from 30 - 80mph full throttle roll-on - the average of the middle 6 runs was 7.9s.

Next up will be to fit the bits then backdown for a second run.

[bazzer]

I can't see the dyno run for some reason  :-(

[Winger]

I’d be amazed if the BW headers were not just a copy of the Akra’s, but that dip you see is fuelling, the headers just make everything flow better.

But....I can’t make top nor tail of you A/F lines, I realise so many dyno’s are different but all the good dyno runs i’ve Seen have them as level and as flat as possible.

[Belco100]

Originally Posted by Winger

But....I can’t make top nor tail of you A/F lines, I realise so many dyno’s are different but all the good dyno runs i’ve Seen have them as level and as flat as possible.

Yes - this is box stock - lean as hell low down, hits the dip then richens up top end, actually seems too rich?

[Colin]

It will be interesting to see what you think with the baffle out and the new headers on, it was just too noisy for me with Black Widow throughout and baffle out. Looking forward to your next dyno run 

[Winger]

My set up is Akra/MIVV/PC, never even thought about taking the baffle period, there’s as much hassle as you like out there never mind looking for it by taking the baffle out...no matter how much better the motor runs, and i’ve Done exactly the same with my KTM.