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migueless, Kev.L, 1284rider, Paulhere, Djairouks, veetwin, RaglandT and 12 Guests are viewing this topic.

Online souperdoo

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Re: New 2020 Tiger 900 Rally & GT launch
« Reply #80 on: December 04, 2019, 08:19:26 PM »
Paulhere,
Thank you for that link, it provides much food for thought.

To recap a little, my original confusion started with a quote from advpulse where it was stated that the firing order was 1-3-2. This seemed an odd thing to say, as I had heard that the 900 was an 800 a bit stroked and expected at 120-degree crankpin-angle crank. Thus, there had to be something more.

bucksfizz offered this:
*Originally Posted by bucksfizz [+]
Apparently, according to Stewart Wood, the crank pins are set at 90, so you are quite right.
This gives a 180, then a 270 and another 270 firing pulse.

which was a bit of a clue-drop falling on my head. I interpret his statement as, if crankpin #1 is seen as zero, then #2 is at 90 and #3 is at 180. 1 and 3 are in the same plane while 2 is normal to them. This is a bit different than the Mercedes, which has two crankpins in one plane and the third in another, normal to the other two.

I don't think well in circles, so I need to go find some paper to muddle through this.

Thanks to Djairouks, Paulhere, bucksfizz, 1284rider and AvgBear for enlightenment and discussion.
« Last Edit: December 04, 2019, 08:36:44 PM by souperdoo »

Online Djairouks

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Re: New 2020 Tiger 900 Rally & GT launch
« Reply #81 on: December 04, 2019, 08:42:15 PM »
*Originally Posted by souperdoo [+]
Paulhere,
Thank you for that link, it provides much food for thought.

To recap a little, my original confusion started with a quote from advpulse where it was stated that the firing order was 1-3-2. This seemed an odd thing to say, as I had heard that the 900 was an 800 a bit stroked and expected at 120-degree crankpin angle crank. Thus, there had to be something more.

bucksfizz offered this:
which was a bit of a clue-drop falling on my head. I interpret his statement as, if crankpin #1 is seen as zero, then #2 is at 90 and #3 is at 180. 1 and 3 are in the same plane while 2 is normal to them. This is a bit different than the Mercedes, which has two crankpins in one plane and the third in another, normal to the other two.

I don't think well in circles, so I need to go find some paper to muddle through this.

Thanks to Djairouks, Paulhere, bucksfizz, 1284rider and AvgBear for enlightenment and discussion.

Yes that's right, the piston goes up compressing the air making 180 and basically that's when ignition starts, they never say 0, so then with crankcase physically at 90 intervals, ignition of 2nd cylinder is 270, then I guess 3rd one at 360, or 540 which then makes it closer to 1st detonation at 180 from it, rather than 360 who knows exactly that is an interesting thought !

Don't worry it's not Always easy  to think in 4 strokes  :008:

Online RaglandT

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Re: New 2020 Tiger 900 Rally & GT launch
« Reply #82 on: December 04, 2019, 09:17:50 PM »
Best description of the new firing order I have seen yet: 



https://www.revzilla.com/common-tread/2020-triumph-tiger-900-gt-and-rally-first-look

« Last Edit: December 04, 2019, 09:29:11 PM by RaglandT »

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Re: New 2020 Tiger 900 Rally & GT launch
« Reply #83 on: December 04, 2019, 09:20:15 PM »
*Originally Posted by K1W1 [+]
Why on earth does anybody need dual tachometers on one display?



This feature is going to increase my insurance premium because my nearside eye is much weaker than my offside eye!!
Honda 90 c200, Norton Dominator 99, Triumph (Saint) T110, Triumph 750 T140 ES, Triumph Bantam Cub, Triumph Tiger Cub, BSA 650 Golden Flash, Honda CBF 1000, Triumph Sprint GT, Tiger 800 XrX low. 2018 Tiger 800 XRT.

Online souperdoo

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Re: New 2020 Tiger 900 Rally & GT launch
« Reply #84 on: December 04, 2019, 11:43:44 PM »
*Originally Posted by RaglandT [+]
Best description of the new firing order I have seen yet...

Well found, sir! Well found indeed! Thanks very much for that.

Offline Admin

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Re: New 2020 Tiger 900 Rally & GT launch
« Reply #85 on: December 05, 2019, 12:23:47 AM »
Power and torque curve charts for those who are interested  :038:



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Offline TigerBC

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Re: New 2020 Tiger 900 Rally & GT launch
« Reply #86 on: December 05, 2019, 02:48:11 AM »
*Originally Posted by souperdoo [+]
With Barenaked Ladies? (not sure you'll get that reference...)

I'll speak up for Canadians and admit that I get that reference...   :)

Online Djairouks

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Re: New 2020 Tiger 900 Rally & GT launch
« Reply #87 on: December 05, 2019, 05:39:23 AM »
*Originally Posted by RaglandT [+]
Best description of the new firing order I have seen yet: 



https://www.revzilla.com/common-tread/2020-triumph-tiger-900-gt-and-rally-first-look

That's a very interesting choice indeed, trying to mimic a big bang twin, but something really escapes me there.

Take the 800 curve, since the crank angles are 120, change the ignition timing in the ECU, to 120, 240, 480 and basically you get a similar effect, torque would even be higher between the 2 first ignitions, because overlap would be 60 so mean torque also higher.
The Daytona with 120,240,360 ignition made 95% of the 800's torque, being only 84 % of the cc of the 800.

They wouldn't have needed to go to 900cc and most likely not use that much more fuel, even with down tuning for Euro5 again I'm no engine expert but it seems a bit underwhelming, to extract only 8Nm with all these changes.
Surely the motorcycle will be good and capable, well finished in the triumph ethos, but I'm a bit puzzled that they didn't extract 15% more torque with such tech.
« Last Edit: December 05, 2019, 05:52:00 AM by Djairouks »

Online K1W1

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Re: New 2020 Tiger 900 Rally & GT launch
« Reply #88 on: December 05, 2019, 05:46:29 AM »
I see that the power socket beside the ignition key has been deleted.
The seat release lock now appears to be on the left side underneath the riders seat with some models at least having a single power socket there beside it much like the original XRX and XRT models had.

Online Djairouks

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Re: New 2020 Tiger 900 Rally & GT launch
« Reply #89 on: December 05, 2019, 05:48:19 AM »
*Originally Posted by K1W1 [+]
I see that the power socket beside the ignition key has been deleted.
The seat release lock now appears to be on the left side underneath the riders seat with some models at least having a single power socket there beside it much like the original XRX and XRT models had.

Also note the passenger heating seat controls same side under rear passenger seat.

 


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