Deleted account 200502001
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hilltop remapping etc
- Thread starter TLSgazza
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No probs bs ,Geoff at hill top did say that having the remap should sort it out but you never know there has been other theories to why this occurs .
Remus decat headers,Beowulf silencer,standard filter, on first run figures where
79 BHp at back wheel and torque 67ft/lb after remap on next run
107 bhp and 88 ft/lb quite a difference I can't wait to get out for a blast without
The duchess ..........gav
Impressive figures +35% on power and +31% on torque, I imagine that you should feel a serious difference! - as well as the reknowned 'far smoother'
Any chance you can post scans of the plots up here?
Also interested to learn how 'Bear's 6 get on and to see those plots/read feedback and impressions.
TimboLeMatelot
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For those interested I spoke to Geoff regarding his remap. I'll add first that I spent some years at Ricardo in Shoreham putting automotive engines on dynometer test beds so I have seen and been around lots of engine test work.
Geoff does not just remap but loads a new firmware, the basis of which is, as I understand it, is that the ECU runs closed loop all the time using the MAF (Mass Air Flow) sensor to control to a AFR of 12.5 ish to 13.5. I can't remember the exact figures. He has taken two years to develope the firmware. He has regularly seen GS's in showing AFR at 16 which is seriously lean and the fact that bikes have failed with burnt out valves supports that.
On the basis of that conversation I have booked my bike in for 14th March so I am looking forward to see the pre and post results and I will try to publish as much evidence as I can to benefit the rest of you.
Oh and I also asked where the bikes were most at risk from a lean mixture and Geoffs advice was to keep below 5000rpm.
Best wishes
Tim
Geoff does not just remap but loads a new firmware, the basis of which is, as I understand it, is that the ECU runs closed loop all the time using the MAF (Mass Air Flow) sensor to control to a AFR of 12.5 ish to 13.5. I can't remember the exact figures. He has taken two years to develope the firmware. He has regularly seen GS's in showing AFR at 16 which is seriously lean and the fact that bikes have failed with burnt out valves supports that.
On the basis of that conversation I have booked my bike in for 14th March so I am looking forward to see the pre and post results and I will try to publish as much evidence as I can to benefit the rest of you.
Oh and I also asked where the bikes were most at risk from a lean mixture and Geoffs advice was to keep below 5000rpm.
Best wishes
Tim
Deleted account 200502001
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Following a recent valve failure scare (turned out not to be) on my bike ^^ thats one of the factors that made me decide to go ahead and book my bike in with Geoff.
thebuyer
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Deleted account 211025001
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No scare here... Just need more power for Cadwell ....
Yeah right.........
Cadwell doesn't need power just lots of skill........
Andres
thebuyer
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O well ... Lacking in that.... So more power and if in doubt ... flat out....
.....Live fast, play hard, die young (ish) 
Deleted account 211025001
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O well ... Lacking in that.... So more power and if in doubt ... flat out....
Try the flat out thang down into, around and out of Mansfield, it'll be an experience
Andres
I'll post up my results after they've been done. I do have decatted headers though.
O well ... Lacking in that.... So more power and if in doubt ... flat out....
Try flat out over the mountain
PS. My Suzuki DR650 supermoto kicked arse around Cadwell.
PPS. I was in the slow group.
PPPS. It was absolutely pissing it down and I had wets on
Oooh did someone mention Cadwell, here me on the tls going over the mountain a few years ago.
That's exactly the information I was after when I started this thread, thank you sir.
That's exactly the information I was after when I started this thread, thank you sir.
Did you learn to identify the MAF at Ricardo?
I can't find anything looking like one on my bike, just sensors for air intake temp, oil temp, barometric pressure, throttle angle and RPM ??
Well my 2005 GS is now a lot smoother. So much so, that I am going much faster than I think until I look at the speedo.
It has gone from 78bhp and 61ft/lb torque to 90bhp and 76ft/lb torque.
There was a HUGE dip in the torque curve at 4400rpm. So big that Geoff asked me how I actually rode the thing like that.
90bhp peak power. LC/WCs as standard make 92-95bhp as standard on the dyno
You could tell after the map was installed and it was run up on the dyno that it was much improved. It's almost too smooooth now. I'm going to have to change how I ride it.
Geoff was trying to be tactful about how agricultural a GS is. Until I blurted out "Well it IS a ditch pump engine"..... His sense of humour is very similar to mine.
My 2005 model 1200GS is running Remus decat headers and the OE can and filter. Bike has done 43k.
It has gone from 78bhp and 61ft/lb torque to 90bhp and 76ft/lb torque.
There was a HUGE dip in the torque curve at 4400rpm. So big that Geoff asked me how I actually rode the thing like that.
90bhp peak power. LC/WCs as standard make 92-95bhp as standard on the dyno
You could tell after the map was installed and it was run up on the dyno that it was much improved. It's almost too smooooth now. I'm going to have to change how I ride it.
Geoff was trying to be tactful about how agricultural a GS is. Until I blurted out "Well it IS a ditch pump engine"..... His sense of humour is very similar to mine.
My 2005 model 1200GS is running Remus decat headers and the OE can and filter. Bike has done 43k.
MWH
Registered user
Some nice increases there, seems it is noticeable as you say its to smooth! Were there any graphs showing AFR before and after?
Bendy toy
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Does he install a MAF sensor? Or is the new firmware using the O2 sensors to correct the mixture?
It's easy to see why BMW have not asked Geof to consult on their ECU software. They'd have had no excuse to build the WC.
It's easy to see why BMW have not asked Geof to consult on their ECU software. They'd have had no excuse to build the WC.
Had mine done a while back no parts replaced just wizardry and witchcraft to the software.
Taking my 2012 Gs to Hilltop on Friday morning, the bike is currently in a local engineers having the cat removed.
I have a graph showing AFR on the first run. It's scarily lean. The twin cams were even worse. Over 20:1 on tickover up to 2500rpm. So as Geoff said, it's doing more harm the gentler you ride it.
I didn't get an "after" graph though.
He uses the existing MAF sensor in the airbox.
i rather doubt it. there isn't one.
Well there's a sensor of some sort in the airbox. If it isn't a MAF sensor, what is it?
temperature i think, but it could be air pressure.
a MAF sensor would be fitted between the airbox and the throttle body. it's usually a hot wire that senses the airflow. not sure any bike has one???
a MAF sensor would be fitted between the airbox and the throttle body. it's usually a hot wire that senses the airflow. not sure any bike has one???
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