Page 5 of 6 FirstFirst ... 3456 LastLast
Results 65 to 80 of 94

Thread: Standard vs PCV vs AF-XIED

  1. #65
    Subscriber Click here to find out how to Subscribe
    Join Date
    Dec 2015
    Location
    Grantham, England
    Posts
    221
    Quote Originally Posted by comberjohn View Post
    I would agree with what oldnfat has said. Had my AF-XiED units for over 10k miles now and still think they're great.
    I've been down the sport headers and exhaust route and only could stick it for a few days. I found it too loud over any kind of distance and felt that there was more vibration. I felt that it moved the power further up the rev range with slight loss mid range. But that's only my opinion.
    Much smoother, quieter and puncher on a stock system. But, whatever floats your boat.
    Having tried an LC, I would say that with the AF-XiED, my TC is somewhere in between stock and an LC in terms of performance.
    Was on a trip to the west coast of Ireland a couple of weeks ago and while overtaking a line of cars on a 50% damp road, the traction control kicked in at around 6-7k rpm. That'll do me!
    I didn't find the Exhaust to be too loud, even when I had the full Akro System on.
    I removed the Can after I read one of your earlier Posts.
    I'm now considering reverting back to Stock, Cat and all to see whether there's any Improvement in Performance.
    The only thing I have noticed is the Vibration I feel over distance but I don't know whether that's down to the Exhaust or just the Characteristics of the Bike itself.

  2. #66
    Subscriber Click here to find out how to Subscribe
    Join Date
    Nov 2011
    Location
    Grantham, England
    Posts
    503
    Quote Originally Posted by Gardham67 View Post
    Can't wait to get some miles on it now. My bike is Mistacats old bike so it's had them on before


    Sent from my iPhone using Tapatalk
    I used to run it on setting 7 if that helps, that was 13.8 to 1 AFR on that bike with full Remus.
    You will need to run 2 or 3 tanks of fuel to give it time to fully adapt back.

  3. #67
    Subscriber Click here to find out how to Subscribe
    Join Date
    May 2016
    Location
    Hull
    Posts
    136
    7 it is then. On the ride to work today my initial thoughts are that it is much easier to ride in heavy traffic. The snatchiness had been smoothed out. Not had chance to open it up it. Water and fallen leaves don't go well together


    Sent from my iPhone using Tapatalk

  4. #68
    Subscriber Click here to find out how to Subscribe
    Join Date
    Feb 2003
    Location
    not near to you
    Posts
    18,450
    How long before we see one for the single cylinder G650... ?


    "If you knew when you were going to die, would you live your life differently?"

  5. #69
    Subscriber Click here to find out how to Subscribe
    Join Date
    Nov 2009
    Location
    Wokingham, England
    Posts
    1,178
    No time at all....it already exists....go to Nightrider.com and check it out. £165 I believe.

  6. #70
    Subscriber Click here to find out how to Subscribe
    Join Date
    Nov 2009
    Location
    Wokingham, England
    Posts
    1,178

    Update...interesting side effects

    Ok time for an update. Now been running for about 4K miles....and still loving the impact these units have had.

    Having run 1200GS bikes for 8 years now, it has been interesting to see the impact running the AF units have had elsewhere. When I put the units on I took the opportunity to polish my standard headers back to new (bluing and all other imperfections polished out).

    4K miles later I have a slight straw colour on the top part of the headers but other than that no other discolouration at all. Also, I am using allot less oil...granted this may be a factor of more miles but oil use had been pretty consistent up until then. I would need a top up every 1k miles.....not touched it since fitting the AF units.

    I can only put this down to a cooler running engine....could the effects really be that dramatic.....it seems so.

  7. #71
    Subscriber Click here to find out how to Subscribe
    Join Date
    Oct 2016
    Location
    Norfolk, England
    Posts
    10
    Quote Originally Posted by oldnfat View Post
    Ok time for an update. Now been running for about 4K miles....and still loving the impact these units have had.

    Having run 1200GS bikes for 8 years now, it has been interesting to see the impact running the AF units have had elsewhere. When I put the units on I took the opportunity to polish my standard headers back to new (bluing and all other imperfections polished out).

    4K miles later I have a slight straw colour on the top part of the headers but other than that no other discolouration at all.
    Could you tell me what you used to polish out your headers please? Mine look pretty rough and I'd like to do something about it.....if I can.

  8. #72
    Subscriber Click here to find out how to Subscribe
    Join Date
    Nov 2009
    Location
    Wokingham, England
    Posts
    1,178
    Very simple....started with Optiglanz which you spray on (from Amazon) ....amazing stuff...and a Halfords metal polishing kit that fits to the drill. These headers were brown all over, an 90 mins later like this.....same for my chrome Ines but didn't use Optiglanz.

    Cheers
    Mark

  9. #73
    Subscriber Click here to find out how to Subscribe
    Join Date
    Oct 2016
    Location
    Norfolk, England
    Posts
    10
    Thanks, I'll give that a whizz.

  10. #74
    Subscriber Click here to find out how to Subscribe
    Join Date
    Feb 2003
    Location
    not near to you
    Posts
    18,450
    Quote Originally Posted by oldnfat View Post
    No time at all....it already exists....go to Nightrider.com and check it out. £165 I believe.
    nope - its not there ??


    "If you knew when you were going to die, would you live your life differently?"

  11. #75
    Subscriber Click here to find out how to Subscribe
    Join Date
    May 2014
    Location
    Downpatrick, N Ireland
    Posts
    771
    It is listed, but no info about it.
    Drop them an email, they are very helpful.

  12. #76
    Subscriber Click here to find out how to Subscribe
    Join Date
    Jul 2014
    Location
    Boston & Miami, USA
    Posts
    578
    Quote Originally Posted by oldnfat View Post
    Ok time for an update. Now been running for about 4K miles....and still loving the impact these units have had.

    Having run 1200GS bikes for 8 years now, it has been interesting to see the impact running the AF units have had elsewhere. When I put the units on I took the opportunity to polish my standard headers back to new (bluing and all other imperfections polished out).

    4K miles later I have a slight straw colour on the top part of the headers but other than that no other discolouration at all. Also, I am using allot less oil...granted this may be a factor of more miles but oil use had been pretty consistent up until then. I would need a top up every 1k miles.....not touched it since fitting the AF units.

    I can only put this down to a cooler running engine....could the effects really be that dramatic.....it seems so.
    Likewise for me. I polished my R1150 headers, which has consistently been a rusty orange every couple months, about 2 years ago. There is still no oxidation or redness. Running richer than stock significantly drops the exhaust gas temperature and as a result the headers stay shinier.

  13. #77
    Subscriber Click here to find out how to Subscribe
    Join Date
    Feb 2014
    Location
    Aberdeen / Inverness
    Posts
    607
    Well thats me taken the plunge and bought a set for my 2012 GSA TC, so heading to the states this week so getting them delivered to the office over in Houston. Bike due a service so will get that all done on my return and fit them, so reading all the posts the best option is setting to 8 for stock exhaust system on the twin cam?? Cheers

  14. #78
    Subscriber Click here to find out how to Subscribe
    Join Date
    May 2014
    Location
    Downpatrick, N Ireland
    Posts
    771
    When I had the full de cat headers and sport exhaust on my TC, I had them at 9. Could only stick the noise for two days!
    Think thats why you see so many sports systems for sale.
    I now run the stock TC system with the AF-XiED's at 8 and it's running perfectly with a good spread of power.
    Much as many of us would hate to admit it, the stock TC system is pretty good in terms of power without excessive noise. Only a couple of aftermarket silencers produce a few more BHP than stock, but are seriously loud.
    You will discover that your GS is the bike you've always wanted.
    Let us all know how you get on with them.

  15. #79
    Subscriber Click here to find out how to Subscribe
    Join Date
    Feb 2014
    Location
    Aberdeen / Inverness
    Posts
    607
    Cheers for that, love the bike as is but just that low down roughness im hoping to get rid of save bashing lids with other half in slow moving traffic. Oh and of course everything else that i have read from you guys on adding these units.

    Definitely will report back how i get on with them...

  16. #80
    Subscriber Click here to find out how to Subscribe
    Join Date
    Feb 2014
    Location
    Aberdeen / Inverness
    Posts
    607
    Quote Originally Posted by Roger 04 RT View Post
    You actually can measure the results on the road. The method is to take a GS-911, put it into data collection mode take several in-road acceleration samples, and average the results. The chart below is an example of that on a modified bike, compared to a stock dyno run done by a reputable shop. It isn't a perfect comparison, but the improvement in the 2000-3000 rpm range is what many riders report.

    Further, it is well known among pilots of piston engine aircraft, which have a control that directly alters AFR, that engines get smoother as you shift them toward Best Power and they run roughly as you lean the mixture toward Best Economy.

    If you leave the O2 sensors connected, chip remapping cannot alter AFR in those areas where Closed Loop fueling is active. Further, if a chip remapper does change fueling in the closed loop area, long term trims get out of whack in those areas not supported by Closed Loop. Not saying it can't be done to effect in the Open Loop areas (wide throttle angles) but it's tricky on a bike with O2 sensors.

    The second chart below shows an R1200 before and after acceleration done on a dyno using gs-911 data collection.



    Hi Rodger,

    In order to gather the data with the GS911 i take it you simply put your laptop into the top box and log via the laptop? I will have to get the old GS911 out and have a play with getting it into data logging mode. So is it worth me getting the bike in standard un-molested form and take it out and get some data logged prior to installing the AF units??

    Did you simply use excel to plot the data?? Are you able to share the standard data (for a TC if possible) so i have a comparison? Ive got a 2012 TC GSA with 11K miles on the clock that would be looking to do the test with.

    Just thought it might be interesting to have a before and after log on another bike??

    Cheers
    Mark

Page 5 of 6 FirstFirst ... 3456 LastLast

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •  

Anyone attending a Ride Out or Event organised through the UKGSer Forums does so at their own risk.
UKGSer.com or anyone organising an event posted here will not be held responsible in any way for damage or personal injury sustained while attending any such events.

Members attending any such event do so at their own risk.

The text, images, graphics, sound files, animation files, video files, and their arrangement on this Website are all subject to copyright and other intellectual property protection. These objects may not be copied for commercial use or distribution, nor may these objects be modified or reposted to other sites without prior written permission.

Disclaimer: Use or depiction of the BMW logo or trademark throughout this web site is for illustrative and editorial purposes only, and to the benefit of the trademark owner, with no intention of infringement of the trademark.

The UKGSer Forums may include adult content for which it cannot be held responsible. Your use of this website constitutes acceptance of the UKGSER network privacy policy

"Its about being a grown up hooligan - and if that means a dark visor, remus open pipe and a bit of speeding out of town then all well and good"