ScuRoo

https://www.cycleworld.com/blogs/ask-kevin/four-stroke-engine-power-explained/?utm_source=Cycle+World+MC&utm_campaign=4827f51dfe-CW_EMAIL_CAMPAIGN_010724&utm_medium=email&utm_term=0_3a16588fbb-4827f51dfe-453096853 Kevin’s article adds explanation to the MR hi-comp chamber/piston improvements that assists combustion & increases compression Well worth a thoughtful contemplation

No. Soon will begin your journey ‘Superstition is like a magnet. It pulls you in the direction of your belief.’ -Master Po

Balls to that… odd’s cool 😎 When the going gets rougher the Quota is tougher

I’m going to just add this in here as further KC tech commentary https://www.cycleworld.com/about-those-finger-followers-on-sportbike-engines/

Merry Christmas blues you V11’s

Hi Eamonn Your query re MRM hi-comp pistons. Yes. Absolutely. I will answer from memory here… you can always check by going over old posts yourself I seem to recall years ago when I ordered my pistons there were a couple of weight versions - one being comparable to oem stock weight in replacement & the other being further lightened. The piston profile of the two were the same tho. The V11 combustion chamber differed from previous Guzzi big blocks by having a angled squish band designed into it. I won’t try & relay here the details of the benefits this gives but at the time I researched it extensively because I enjoy understanding the nitty gritty (my ocd kicks in) - but essentially it improves air/fuel mixture turbulence & homogenisation than flat squish band at the higher RPM’s which Guzzi was trying to improve upon for the V11 design. Remember also it was changing to fuel injection from carburettor too on the V11 models. This was all happening at the time of Aprilia taking ownership as well. I digress. However - there seems to have been either a cost cutting exercise going on or an ordering oversight boo-boo stuff up of sorts & the pistons design wasn’t changed to properly match with the angled squish band heads. So while the heads squish band surface was angled the piston squish band was flat resulting in an ineffective non-working squish action. This mismatch is the root of the V11 tendency to detonate under certain conditions . I digress again. Anyhow Mike Rich spotted the design nuances of the V11 head chamber squish angle & designed his pistons with the same matching angled squish to work properly with the V11 heads which the Guzzi factory had ultimately failed to ever rectify. Improved piston chamber turbulence dampens detonation occurring & allowed a slightly higher compression ratio to be achieved as well with Mike’s hi-comp design. Whew! Sorry that the basic backstory from memory took so long Eamonn. Anyhooo… at the time I think a member called helicopterJim had previously installed MRM pistons & his positive commentary on his experience probably influenced my own decision to go ahead with Mike’s pistons. I chose the standard weight MRM pistons as I didn’t want to be bothered with any extra hassle of balancing work costs. I noted Pete Roper rating Guzzi conrods as very strong, very good & so had no desire to additionally fork out for Carillo’s in that case. The piston’s had a noticeably positive impact on installation. A slightly sharper bark with a more ‘awake’ feel & pulls harder thru midrange & sustains it longer imo. The occasional detonation rattle reduced to almost never - maybe once in a year of riding I’d notice a little rattle rattle for a second or so… that’s it even in hot 100F days. And that was before a better Bosch O2 sensor which improved the ECU control. My bike has the 15RC ECU so it continually trims the fuel when changes are made so it has capacity to recalibrate itself to it’s desired Lambda ratio in time. I seem to recall American V11 owners who installed Mike’s pistons without retuning their ECU’s & their bike’s coped fine with improvement but maybe others can confirm this recollection. In short - go ahead & install the pistons. They are an improvement. Oh, I just remembered - they are forged & a little clickety clackety mechanically louder for a couple of minutes until the combustion heat expands them just ever so slightly & that mechanical clatter completely disappears. Hope that helps

Strewth! Ain’t that the truth Ken oath

"Let not any one pacify his conscience by the delusion that he can do no harm if he takes no part, and forms no opinion. Bad men need nothing more to compass their ends, than that good men should look on and do nothing. He is not a good man who, without a protest, allows wrong to be committed in his name, and with the means which he helps to supply, because he will not trouble himself to use his mind on the subject." - John Stuart Mill (1806 - 1873)

https://www.intechopen.com/chapters/41889 Abiogenic Deep Origin of Hydrocarbons and Oil and Gas Deposits Formation "The theory of the abiogenic deep origin of hydrocarbons recognizes that the petroleum is a primordial material of deep origin [Kutcherov, Krayushkin 2010]. This theory explains that hydrocarbon compounds generate in the asthenosphere of the Earth & migrate through the deep faults into the crust of the Earth. There they form oil & gas deposits in any kind of rock in any kind of the structural position (Fig. 1). Thus the accumulation of oil & gas is considered as a part of the natural process of the Earth’s outgrassing, responsible for creation of its hydrosphere, atmosphere & biosphere. Until recently the obstacle to accept the theory of the abyssal abiogenic origin of hydrocarbons was the lack of the reliable & reproducible experimental results confirming the possibility of the synthesis of complex hydrocarbon systems under the conditions of the asthenosphere of planet earth."

That’s quaint

Yup It’s been recently discovered an estimated one trillion cubic feet of natural gas 30km off the shore in the Gaza Marine field. Clearly There’s no such thing as a coincidence

https://rumble.com/v3wxlr4-in-the-year-2525-zager-and-evans-sanjin.html Loving the black & whites That prison performance earlier was powerful In the year 2525… are we there yet?

Appreciate the endorsement Meinolf. That settles it. Thank you gentlemen.

You got no idea who he is do you 😌

At first glance one might be dismissive … except for recalling an interesting conversation I had with a well known Guzzi guru in Australia more than 18 months ago about the future LeMans model where he wryly quipped, “You might be surprised… you might find it may be electric.” 😳

That ethanol helps those fossil fuel resources last a little longer … Ya think?

Yusuf Cat whatever I’ve learned over the last couple of years it’s better to taste the sweet fruit than to be bothered by reading the label Kinda along the lines of …by their fruits ye shall know them

Banjos to me sound like a dirty, dirty girl with strings attached Dammit

Riding gets the soul soaring a bit like like music can Years ago I had over a week with mates bonding riding my ScuraR from the Atlantic (Biarritz) zigzagging from France to Spain up & down over the Pyrenees mountains to the Mediterranean There’s something quite special & soul atmospheric when riding higher ground - a life forming experience I still carry with me Any of you fella’s had a ride like that?

‘War is a racket’ ~ General Smedley Butler

Brother-in-law traded his Ducati Monster in on a MT09 with Akrapovic exhaust - so I recently had opportunity to test it. That triple is impressive. Ugly as only a mother could love - but the motor is a peach. if you get the chance to try - don’t pass on it

For those wondering whether you have a 15M or a 15RC ECU - it’s very simple to identify. Don't bother looking at the ECU & unpeeling labels under labels & scratching your head or arse. a) Look in the mirror instead. If you’re a Yank (& don’t possess a passport) you have a 15M ECU USA imported V11. And simply move along nothing to see here same with owners of the earlier V11 sans O2 models. Don’t forget this is still an international forum fella’s… it was only the later model European V11’s (& other exported to countries) which had the upgraded 15RC ECU which had additional Closed Loop adaptability. b) If not sure you’re a Yank - get on your knees & look for a O2 sensor as I’ve circled in docc’s diagram above. If your V11 comes equipped with an O2 sensor inserted - you can be 99% confident your ECU is the 15RC closed loop adaptive version. (The 15RC was not exclusively for the V11 but was also utilised on other Guzzi O2 sensor equipped models. The base map was just tailored to suit those other models). c) There’s plenty of opinions from those that don’t own V11’s with O2 sensor closed loop adaptability - these opinions seem to veer towards disabling the O2 sensor as they are only simple narrow band sensors designed for fuel economy or emissions only &/or add unnecessary complexity etc etc. I disagree completely with these notions. The 15RC closed loop adaptability with STFT & LTFT trimming isn’t a backwards step in design. It’s a lovely plus plus on top of the base map - when the throttle is whacked open it operates just the same as the 15M base map as it’s now in open loop mode - but has the added closed loop constant throttle closed loop fine tuning. There is zero problem with the 15RC ECU it’s lightening fast in response times - the original root cause problemo was “the LSH15 probe has such a slow response time to the variation of the exhaust gases” …“the LSH24 instead has a very good sensitivity and a response time equivalent to the reading interval of the ECU.” The 15RC ECU. Don't disable in trying to cure any hiccup stumble or poor running problems. Just simply change the bloody O2 sensor to the improved LSH24 and you’ll have all the open loop 15M provides plus more with closed loop adaptability - which auto tunes out… any hiccup stumble or poor running problems! If this doesn’t make perfect sense folks then go & rip out all your O2 sensors from every other vehicle you own - even butcher the V100 Mandello with its closed loop adaptability O2 sensors. It’s clearly too complex - which is probably a bad thing.

Cui Bono

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