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Offline Paullie

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Re: Which exhaust has everybody got....
« Reply #140 on: 20 August, 2018, 02:59:16 PM »
For those of us not so up on this, could you explain, if Hilltop is a closed-loop system, what the OEM Triumph system is and how that differs?

And maybe why Triumph didn't also go for closed-loop to start with?

Offline TimboLeMatelot

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Re: Which exhaust has everybody got....
« Reply #141 on: 20 August, 2018, 04:29:54 PM »
A brief explanation.....I am not an expert but have had some professional experience of engine development and dynometers

The closed loop constantly monitors the O sensor and from the reading obtained calculates the air fuel ratio of the fuel mixture at that point in time and adjusts the fueling as necessary to obtain an ideal air/fuel ratio, about 13 to 14.7 this is constantly happening as you ride.

Therefore a change in throttle or load or altitude (change in air density, think Alps/Pyrenees) will require an adjustment of fuel which is automatically dealt with. Furthermore changing your end-can or air filter is again automatically adjusted for.

Manufacturers have to get their bikes through emissions testing, by running open loop and mapping specific fuel required for given conditions (throttle, rpm, load, air density) the amount of un-burnt fuel can be manipulated (VW software in the news, diesel I know but same principle) however in doing so modern engines run lean (little fuel) and hot . Most bikes have an O sensor but the system only refers to them under certain circumstances or change of condition which is not the same as closed loop. In consequence lots of Beemer RG1200s, the air cooled version were burning out exhaust valves on extended hi-speed runs eg across France, constant condition with no change to trigger the ECU to check the O sensor.

Hilltop's solution is very eloquent and works very very well but I am starting to think we should be quiet about it before someone puts a stop to it!!

Offline Paullie

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Re: Which exhaust has everybody got....
« Reply #142 on: 20 August, 2018, 09:37:20 PM »
Thanks for the explanation ...  :028:

Moral i've taken away is ... if ever I buy another Beemer GS, make sure it's the watercooled version ....  :015:

Offline Paul2bikes

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Re: Which exhaust has everybody got....
« Reply #143 on: 20 August, 2018, 10:03:41 PM »
When Muddy Sump serviced my TS he had it plugged in when balancing injectors he showed me on screen open loop that had to be closed loop. Lost me.
The greatest deception men suffer is from their own opinions.
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Offline Foxes

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Re: Which exhaust has everybody got....
« Reply #144 on: 21 August, 2018, 08:26:45 PM »
$200 or a 100 Quid for a MRW Air filter, does that sound about right, what would you pay in the UK? for a after market filter.

Offline Timbox

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Re: Which exhaust has everybody got....
« Reply #145 on: 21 August, 2018, 08:43:29 PM »
*Originally Posted by Foxes [+]
$200 or a 100 Quid for a MRW Air filter, does that sound about right, what would you pay in the UK? for a after market filter.

Yep, that one is dear, I went for a DNA and thought that was pretty salty at 60.
Ex Sport owner now on KTM 1290 SAS

Offline Yellow Dog

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Re: Which exhaust has everybody got....
« Reply #146 on: 21 August, 2018, 08:58:59 PM »
*Originally Posted by Timbox [+]
Yep, that one is dear, I went for a DNA and thought that was pretty salty at 60.

It's just the very same air filter as is on the MKI right?

I'm thinking BMC & Piper Cross  :187:
2018 TIGER 1050 SPORT (c8

Offline R3morf3R

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Re: Which exhaust has everybody got....
« Reply #147 on: 21 August, 2018, 09:47:59 PM »
*Originally Posted by Foxes [+]
$200 or a 100 Quid for a MRW Air filter, does that sound about right, what would you pay in the UK? for a after market filter.

I paid 135 euro shipped, which is indeed really expensive. Am very happy with the results though, so not bothered by that.
Would be if if hadn't performed this well.

Offline Foxes

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Re: Which exhaust has everybody got....
« Reply #148 on: 21 August, 2018, 10:23:51 PM »
Yes its the same filter for the MK1

Offline Aphex

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Re: Which exhaust has everybody got....
« Reply #149 on: 23 November, 2018, 05:14:25 AM »
Can anyone with a high mount Mivv Suono confirm it works with the OEM hard bags that came on the SE?
2010 Tiger 1050 SE