More urge, go, power for bugger all!

  • Thread starter Thread starter The Mechanic
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Just 270 miles today, I average 500 miles a week pleasure only. (Still have time to polish the Pie Crust off though) Must spend to much time picking your's up then?
 

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Only 500 miles a week!!!!!!

Just done another 320 miles today, you really must try harder metal man, 500 miles a week is just not good enough, that's only 24k a year (if it goes out in the wet at all) :D
 
Re: Re: More urge, go, power for bugger all!

Muppet said:
But surely if your bike's got fuel injection (sorry, I've not got a GS yet so I don't know the full technical spec on all the models) the on board engine management will compensate for the extra air and adjust the fuelling accordingly?

Muppet,
GS's are set up to run quite lean from the factory and the motronic/Lamba sensor are not designed to compensate for a free-flowing can the way the VFR's injection is. If you swap the stock exhaust for a free-flowing one, you should disconnect the Lamba and pull the cat plug, or rechip the bike.

But in any case, big power gains are not there to be had. I've experimented with a Laser exhaust, chip and performance snorkel, only to gain a whopping average of 1.5 hp more than the stock can, despite Laser's claims of a 15 percent power gain. My Staintune low pipe was slightly better, giving me an average of 2.5 hp. And, unfortunately, gas mileage went down a lot more than power went up.

If you want to swap cans to lighten the bike a little, make it rev a little more freely or simply to make it sound a bit more like a motor bike, fine, but if you're doing it for power gains, then you'll likely find yourself disappointed. On the bright side, the GS can haul ass in the twisties even with the lowly 80hp it's got.
 
Well put that man

I can keep up with almost anything through the twisties, but it's a different story on m-ways and straights. My main problem with the 1150 when it came out, was the fuel consumption, you don't get extra power for nothing. You only need about 33bhp to do 100mph, any extra power is just used to make a hole in the wind for you to ride in. By the way, the exhaust I made for mine is the correct lenth and made a huge difference, not bad considering I only wanted it out of the way:D
 
The GS handles very well for a locomotive...:D :D :D :D :D
so far I love it and it keps up with most things in the twisties...

I've had the 2001 GS for 5 weeks, now got 10k+ on it.
Mods so far in order;
1 - Remus y-piece
big improvement to throttle response and the engine revs quicker, feels more torquey and and has more top end.
Sounds a bit more like a motorbike.
Some explosive backfiring (yes I used LOTS of exhaust paste...)
2 - K&N air filter
more induction noise (nice...)but no obvious power difference.
3 - Remus Grand Prix Titanium race can
Sounds nice but no big difference apart from that.
4 - Removed yellow cat code plug and re-set throttle position. This seems to have cured the backfiring and I think it's improved low and midrange fuelling as it feels more responsive and smoother.
The bike does not obviously behave as if it's running lean at all...

That's it so far... a techlusion along with a larger air intakeand dyno run is next

As for removing the lambda sensor with a free flow exhaust, I'm not clear on this yet but I believe the lambda only leans it out at idle or closed loop running so should be ok to leave in as long as you don't leave the bike standing around idling or use a totally fixed throttle position while cruising... we'll see, I'll experiment with this on the dyno (anyone been there/done that..???):moped:
 
THanks for all the info guys, I'll try and remember it when I finally get enough dosh together to buy one!
 
Well I'll be....

As an avid biker (motorcyclist) I do have another bike for (ahem) going faster, its a Fazer Thou and its smoother, quieter, lighter and (obviously) a bloody sight faster- std can etc- so although I would like to think my GS is mechanical perfection, the truth is its a hell of a long way off. Carb and throttle sync. nope sorry not yet far too smooth. Jerking and hesitation, nope not yet far too smooth, acceleration- yep in bucket fulls.

To sum up, the Gs is for fast touring and pootling about, where as the Fazers my 'other' fast bike.

Its out there!
 
Victim of it's own success?

This thread appears to confirm that the requirements of bikers owning GS's is changing as awareness of the bikes abilities and favourable press reports lead to it appealing to a wider market.

Not bad. Not good.

I hope that mbW don't continue to make the GS bigger, heavier, faster, more complicated etc.

No criticisms, merely my own thoughts..........I'll get me hat then.

Tim
 
Re: Victim of it's own success?

timolgra said:

I hope that mbW don't continue to make the GS bigger, heavier, faster, more complicated etc.

Tim

You mean like Honda have done with the VFR....heavier,more compllicated (Vtec), not bigger but not more powerful or faster either. The've buggered up what was a perfectly good bike by making it more expensive to maintain and less rideable. Hope B*W don't go down the same route.
 
I think that mWb got the 1100 bang on first time, like Honda with the pan. If they keep bringing out "newer, faster, better" models, they'll always have a que at the dealers, wanting the new model.
 
Yuk, That last piccy reminded me of my 'off' in May this year when I was rammed from behind by a VFR800! who read the road all wrong. Wrote me beautiful GS off, ( just fitted with Remus Y piece and Revolution, bastard!), I wasn't too good too, but walking wounded. Bike written off.

Big thanks to Allan Jefferies, especially Mike Lyons and Keith Haunch who sorted everything out. I was paid out in 4 weeks from the other guys insurance and on the road with a brand new twin spark GS in 6 weeks. Thats what I call dealer service.

Thing is I honestly think the twin spark motor is so much more smoother and has the mid range the previous bike had with the Remus kit.

Anyone else had a similar experience?, ( the bike performance not the off, you don't want those).

In view of the grief from the pillion re the Remus noise I'm going to leave it standard. Fully agree with the mods v skills debate.

Some right dipsticks out there on much modded bikes who couldn't ride a wheelbarrow.

:cool:
 
The Intake snorkel is tuned to a certain airflow rate, for the engine.
There is a compromise for a long or a short air intake.
For example. go back to the carb principle.
Short intake pipes give more power.
Long pipes give more torque.
Cars now have variable air intake pipes now to get the best of both worlds so you will only move the power around if not make it less. due to the following.

The Snorkel on the GS is comparable to the air volume of the airbox.
As air is drawn in the engine it creates a depression in the airbox and air is once again draw in through the snorkel.
The small opening is designed to act much like a carb venturi so as the gap opens up towards the engine, the pressure change increases air flow in the snorkel increasing the pressure in the air box and so on.
You may well gain a larger opening but what for ? the engine runs pretty much lean to cope with EU emmisions and without changing the profile of the cams and the fuel map what good is more air.

There is an element of "I have changed it and it cost me money so it must be better" principle with a lot of the bolt on goddies.
phycological advantage is a great tool to have :D
 

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