Traction control? - Page 3 - Stromtrooper Forum : Suzuki V-Strom Motorcycle Forums
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post #21 of 38 Old 08-02-2019, 12:12 PM
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Originally Posted by V-Tom View Post
TC does **NOT** change the engines revs (unless you are spinning the rear tire all the time.) It just backs off the engine power if the rear wheels starts spinning a certain amount faster than the front. The "certain amount" depends on which mode you are in.

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I was aware of this Tom ?

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post #22 of 38 Old 08-02-2019, 12:28 PM
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I was aware of this Tom ?
I just reread your post. I thought you were saying the engine runs at higher revs but on re-read realized your were saying it is smoother at higher revs.

I can't see why that would be the case that the engine runs smoother as I'm pretty sure it doesn't change any engine mapping, just backs off the power with wheel spin.

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Last edited by V-Tom; 08-02-2019 at 04:54 PM. Reason: speeling
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post #23 of 38 Old 08-02-2019, 12:42 PM
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Originally Posted by V-Tom View Post
I just reread your post. I thought you were saying the engine runs at higher revs but on re-read relied your were saying it is smoother at higher revs.

I can't see why that would be the case that the engine runs smoother as I'm pretty sure it doesn't change any engine mapping, just backs off the power with wheel spin.

..Tom
I have never found a complete "authenticated" description of exactly which method or combination of methods Suzuki uses for its TC. I have only seen educated guesses. If anyone has .... love to hear it.
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post #24 of 38 Old 08-02-2019, 12:43 PM
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Quote:
Originally Posted by V-Tom View Post
I just reread your post. I thought you were saying the engine runs at higher revs but on re-read relied your were saying it is smoother at higher revs.

I can't see why that would be the case that the engine runs smoother as I'm pretty sure it doesn't change any engine mapping, just backs off the power with wheel spin.

..Tom
The smoother thing was mentioned on here by one or two folks. I had commented on a rough patch somewhere above 5000rpm. There were the usual fixes mentioned not least insulation foam in the crashbars etc etc. I accordingly tried switching off the TC and went testing. I was skeptical that there was any veracity in the claim but indeed there was a slightly noticeable difference. I told my friend with the same model and he went testing also with a similar finding. However he noticed that fuel consumption also increased a little with the TC off. I cannot comment on that aspect because I hadn't checked fuel consumption. I am well aware that we can sometimes pander to expectations and so I tried several runs before making my mind up. I will reiterate that the reduction in vibes was slight.
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post #25 of 38 Old 08-02-2019, 01:45 PM
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Suzuki would be limited to fuel delivery and timing/lost spark to reduce power. Without throttle by wire they don't have a way of changing throttle blade openings. While rpm may change due to the fuel delivery or timing lost spark it cannot be too dramatic or that will cause issues with traction in itself.

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post #26 of 38 Old 08-02-2019, 02:04 PM
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post #27 of 38 Old 08-02-2019, 02:24 PM
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So from this video the system knows:
What gear
Where in the compression stroke
The throttle position
and it compares the front and rear wheel speed
Power is moderated by manipulating air & spark
----
Indirectly, we know that the ECU can know the speed-over-ground from the wheel speed. We don't know if the MPH is a controlling parameter for traction control.
We don't know if the system (when in mode 2) gives itself a head start for reaction at higher rpm, in higher gears.
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post #28 of 38 Old 08-02-2019, 03:05 PM Thread Starter
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Ok .. in video 2 posted above by branthopolis ... why is the light flashing. What about the riders riding is causing the noise and flashing? Seems like he was just going through some turns I go through every weekend while admittedly I don't pull through under as much power.

I watched it twice full screen on Youtube but I cant see what the bike was reacting to.
Alex

Last edited by Boriqua; 08-02-2019 at 03:08 PM.
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post #29 of 38 Old 08-02-2019, 04:03 PM
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Quote:
Originally Posted by realshelby View Post
Suzuki would be limited to fuel delivery and timing/lost spark to reduce power. Without throttle by wire they don't have a way of changing throttle blade openings. While rpm may change due to the fuel delivery or timing lost spark it cannot be too dramatic or that will cause issues with traction in itself.
There may be throttle control that I forgot about. The secondary throttle could do this are they are electronically controlled.
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'12 DL 650 '14 BMW R 1200 RT

WERKS modified clutch baskets for DL and SV 1000's.
The BEST in chudder control, noise control, and lasting durability! AVAILABLE HERE: www.werksparts.com

Have questions about the clutch in your DL or SV 1000? E-mail Terry [email protected]
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post #30 of 38 Old 08-02-2019, 04:09 PM
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Quote:
Originally Posted by Boriqua View Post
Ok .. in video 2 posted above by branthopolis ... why is the light flashing. What about the riders riding is causing the noise and flashing? Seems like he was just going through some turns I go through every weekend while admittedly I don't pull through under as much power.

I watched it twice full screen on Youtube but I cant see what the bike was reacting to.
Alex
The scratching noise is the footpegs dragging. He is riding hard, lean angles more than you might realize.

The flashing light means the traction control has kicked in to override what the rider is asking of the bike. This can be slight slippage of the rear tire under hard acceleration at high lean angles. Or it can also be because the front tire is lifting enough to reduce its wheelspeed slightly. TC will kick in to overcome either.

Might seem like not much was going on to cause this. But what comes next is what can wreck you. The TC kicks in before the tires completely lose traction.
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'12 DL 650 '14 BMW R 1200 RT

WERKS modified clutch baskets for DL and SV 1000's.
The BEST in chudder control, noise control, and lasting durability! AVAILABLE HERE: www.werksparts.com

Have questions about the clutch in your DL or SV 1000? E-mail Terry [email protected]
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