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Phil, I don't remember if it was you or one of your fellow countrymen that trolled me about the Chevy V8 on the LeMans board. But I'm pretty sure it was you.HAHA.Funny you didn't mention pushrod Guzzi engines.
Really, I don't believe I've ever trolled anyone. It wouldn't be the first time I've been mistaken for some other poster though. What was I supposed to mention about Guzzi BB engine? We all know the BB is an archaic engine as is most of the rest of it. The Griso 8 valver roller tappet version is the zenith of the Guzzi BB line but its a Hi cam.As for the Chev Gen111 and subsequent, well I like the engine but I'm under no illusions. It's not like the most efficient way to make torque, it's all about the cubic capacity which is a bit of a blunt instrument way to go about things.Ciao
Zenith ?Making Carcano’s 700cc a 1200 follows the blunt thingYou may have meant omega Dead now, for sure
Another thing I’ve noticed in this thread is the reference to “oversized “ bearings . All the crank shafts I’ve had done required “undersized “ bearings as you’re removing material , just sayin.
I actually meant Zenith, dictionary definition..... "the time at which something is most powerful or successful" The roller tappet Griso is the Zenith of the BB engine. Or the ultimate iteration if you like.Ciao
This is the internet and hence, opinion, you are entitled to yoursBut I wonder about the criteria you useFor powerful, the MGS 01 is hard to beat, especially when you take in power to weight, my choice for zenith thereHp/litre ? Your Daytona ? Successful ?Sales ?Competition ?Last time I looked there were 3 NOS Grisos for sale in Aus, made in 2016 I believe.Worldwide there could be 100’s on showroom floors, I seriously doubt history will ever record the last BB as being the most successful of the line.Anyone ever enter one in any form of competition? Let alone won?The 750 Land Speed loopy might top chartOr the original Le Mans in proddy racingMk3/4 in US Endurance racing ?Perhaps you measure success as most recalls and least sold ?Omega and sad death for the 50 years of BB GuzzisBy all accounts the worst BSFC figure of the whole lot, so perhaps if we use use the most fuel to make same power, it wins hands down. My favourite criteria , just my opinion, of course
My opinion is an engineering based one. The Griso roller engine is a way better engine from an engineering standpoint that the Daytona/Centy engine and all the other BB engines for mine. I dont believe anyone that knows the Daytona/Centy/MGS engine intimately would even consider it a contender. Just my view based on my experience and what I've seen of the BB engines.Out of interest who has NOS Grisos available in aus? sounds tempting esp an SE.Ciao
That crank assembly in the photo above sums up the nowadays throw away culture, it seems that it is a BIC lighter, the timing sprocket looks like it is non replaceable too. DonG
Although this design rubs traditionalists including me the wrong way, maybe it is no big deal. Someone pointed out that small block cranks could not be reground anyway because shells are not available. If that is so then making a crank assembly that is not intended to be dismantled to minimize costs may be good.It seems that the V7iii cranks are very reliable and long lasting as dealers I spoke to have never had to replace one.I saw that crank assemblies are only $500 or so in Europe so much less than reconditioning an old one unless you had a machine shop.
Every single small block engine has the sprocket cast into the crank since day one..God knows why...
I believe that all the V7iii engines have one piece rods, unlike the V7ii before and the V85. I am not clear about the new V7 850 and would love to know.I hypothesize that the new 850 has the pressed together crank and that is why they have limited the output to 65 hp. Indeed there may be other features of the V85 internals that are not in this new engine.Here is a photo of a crank from a V7iii racer that is a used part on ebay.
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