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#91
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Why put the heaviest to the flywheel?
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Current fleet: 1985 Mercedes-Benz 280TE - Waiting for heart surgery. 1985 Mercedes-Benz 300TDT - Rear ended 23 September 2016 and now looking for a new home. 1979 Mercedes-Benz 300TD - Parted out. 1964 Volkswgen Beetle - Vater's since September 1968 and undergoing a restoration. 1971 Volkswagen Sunroof Squareback with F.I. - in need of full restoration. 1971 Volkswagen Squareback automatic with F.I. - Vacationing with her caretaker until he is in better health. |
#92
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which end is heaviest?
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John HAUL AWAY, OR CRUSHED CARS!!! HELP ME keep the cars out of the crusher! A/C Thread "as I ride with my a/c on... I have fond memories of sweaty oily saturdays and spewing R12 into the air. THANKS for all you do! My drivers: 1987 190D 2.5Turbo 1987 190D 2.5Turbo 1987 190D 2.5-5SPEED!!! 1987 300TD 1987 300TD 1994GMC 2500 6.5Turbo truck... I had to put the ladder somewhere! |
#93
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I spent a good half hour grinding the plate, then taking it the shop, machine setup, turning so it would be pretty, and if you wanted to count it milling down the vac cover and brazing it up pretty
I probably gained like 0.75HP there
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$60 OM617 Blank Exhaust Flanges $110 OM606 Blank Exhaust Flanges No merc at the moment |
#94
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In the simple - over simple case - the crank is like a long beam with a big weight on the end (flywheel). Although the beam is supported at several points (main bearings) it will have a tendency to bend like a banana along its whole length. This is an exaggerated example of behaviour but there is usually a detectable vibration that is closely related to the length of the crank.
If you're adding four "bouncing" weights (pistons going up and down) at four different points along the beam you are better off putting the heaviest of these bouncing weights at the closest position to the big weight at the end of the beam (flywheel). This is because the effect of the heaviest piston is the least on the whole banana bending effect (that you might be able to imagine) of the beam when it is closest to the big dominating weight at the end (flywheel). If you do the opposite and stick the heaviest piston furthest away from the flywheel then you might find that you exaggerate the banana bending effect and excite this vibration that is proportional to the length of the crank. Generally speaking for most "normal" situation vibrations related to large parts of a machine are more of a problem because they often happen within "normal" operating speeds. So you want to avoid exciting / influencing / provoking the big stuff! This whole model / approximation of bouncing weights on a beam with a big weight attached to the end of it supported at various points along its length, however, gets really complicated when you include the effects of combustion and sudden changes in engine speed...
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1992 W201 190E 1.8 171,000 km - Daily driver 1981 W123 300D ~ 100,000 miles / 160,000 km - project car stripped to the bone 1965 Land Rover Series 2a Station Wagon CIS recovery therapy! 1961 Volvo PV544 Bare metal rat rod-ish thing I'm here to chat about cars and to help others - I'm not here "to always be right" like an internet warrior Don't leave that there - I'll take it to bits! |
#95
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Do you mean which end of the conrod is heaviest? If so I feel a smart arse response coming on - the big end!
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1992 W201 190E 1.8 171,000 km - Daily driver 1981 W123 300D ~ 100,000 miles / 160,000 km - project car stripped to the bone 1965 Land Rover Series 2a Station Wagon CIS recovery therapy! 1961 Volvo PV544 Bare metal rat rod-ish thing I'm here to chat about cars and to help others - I'm not here "to always be right" like an internet warrior Don't leave that there - I'll take it to bits! |
#96
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With out a doubt - you'll be flying along.
Did you do any porting work and unswept volume balancing acts on the head?
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1992 W201 190E 1.8 171,000 km - Daily driver 1981 W123 300D ~ 100,000 miles / 160,000 km - project car stripped to the bone 1965 Land Rover Series 2a Station Wagon CIS recovery therapy! 1961 Volvo PV544 Bare metal rat rod-ish thing I'm here to chat about cars and to help others - I'm not here "to always be right" like an internet warrior Don't leave that there - I'll take it to bits! |
#97
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My OM617 Build When it goes from storage to wrenching I'll probably post up a duplicate build thread here
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$60 OM617 Blank Exhaust Flanges $110 OM606 Blank Exhaust Flanges No merc at the moment |
#98
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cause like I said early in this thread, the big end is counted differently from the small end on the balance of the whole....
__________________
John HAUL AWAY, OR CRUSHED CARS!!! HELP ME keep the cars out of the crusher! A/C Thread "as I ride with my a/c on... I have fond memories of sweaty oily saturdays and spewing R12 into the air. THANKS for all you do! My drivers: 1987 190D 2.5Turbo 1987 190D 2.5Turbo 1987 190D 2.5-5SPEED!!! 1987 300TD 1987 300TD 1994GMC 2500 6.5Turbo truck... I had to put the ladder somewhere! |
#99
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...I'm kind of hoping that making an over all weight comparison I'm gonna be more or less good.
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1992 W201 190E 1.8 171,000 km - Daily driver 1981 W123 300D ~ 100,000 miles / 160,000 km - project car stripped to the bone 1965 Land Rover Series 2a Station Wagon CIS recovery therapy! 1961 Volvo PV544 Bare metal rat rod-ish thing I'm here to chat about cars and to help others - I'm not here "to always be right" like an internet warrior Don't leave that there - I'll take it to bits! |
#100
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(I don't really think you'd be calling yourself that if you knew what I meant when I say it! It is a reference to masturbation {don't you know})
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1992 W201 190E 1.8 171,000 km - Daily driver 1981 W123 300D ~ 100,000 miles / 160,000 km - project car stripped to the bone 1965 Land Rover Series 2a Station Wagon CIS recovery therapy! 1961 Volvo PV544 Bare metal rat rod-ish thing I'm here to chat about cars and to help others - I'm not here "to always be right" like an internet warrior Don't leave that there - I'll take it to bits! |
#101
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But yeah, I think Ham Shanker is the funniest way I've heard it put and it makes me snort so we're good
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$60 OM617 Blank Exhaust Flanges $110 OM606 Blank Exhaust Flanges No merc at the moment |
#102
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...so I guess you're the man to take on my direct injection OM617 project? (that's all in my head at the moment - a bit like mega squirt for your diesel)
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1992 W201 190E 1.8 171,000 km - Daily driver 1981 W123 300D ~ 100,000 miles / 160,000 km - project car stripped to the bone 1965 Land Rover Series 2a Station Wagon CIS recovery therapy! 1961 Volvo PV544 Bare metal rat rod-ish thing I'm here to chat about cars and to help others - I'm not here "to always be right" like an internet warrior Don't leave that there - I'll take it to bits! |
#103
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Quote:
Fair warning, I'm beyond slow when it comes to making parts
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$60 OM617 Blank Exhaust Flanges $110 OM606 Blank Exhaust Flanges No merc at the moment |
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