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#76
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#77
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When the engine is at spec, the pulse adaptor will read 15BTDC. Therefore, your vehicle is five degrees late and his is seven degrees late. Both suffer from lack of performance, however, I agree that the difference of two degrees is not significant. The problem with his vehicle is late timing, coupled with another unknown variable that has deteriorated. The TD clearly has something amiss with the crank pulley. Presumably, you won't be able to drip time it as well. |
#78
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At 15° BTDC it sounds like a ceramic plate with several large steel ball bearings bouncing up and down.
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#79
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If you could get an honest 5% these days I think people would be interested. From my understanding the timing device "effect" should kick in at about 2000rpm and after about 3000rpm it should be constant more or less. Thanks for your reply you're inadvertently encouraging me to get my hands on some of this kit to do some experiments of my own...
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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! |
#80
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The 40% was on a VE pump. The timing advance in that case is operated by pump internal pressure which is a function of rpm and modified by a pressure regulator. The VE pressure regulators tend to gradually default to less and less internal pressure and so the timing advance curve gradually gets more and more retarded. I'm not sure how the Merz advance would typically fail. If there was wear that prevented smooth movement to the flyweights, then it would fail to being retarded. If the springs gradually got weaker then it would fail toward advanced. If both happened equally it would be rock solid.
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#81
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Whilst looking for something else I stumbled on this dynamic tuning information
Timing Injection Pump While Engine is Running - Benzworld.org - Mercedes-Benz Discussion Forum
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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! |
#82
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I have been doing some information digging on my jeeps #1 injector. The sensor is just a coil that sits against the injector just near the fuel return lines. It has 72 ohms DC resistance so I guess it has many turns of sub hair diameter wire in it. Talking with some one who knows a bit about inductive sensors, suggests that something as simple as a cassette player head attached to the injector may work. Putting a reasonably high frequency signal across it will get a spike when ever the injector pintle moves. I am sure you understand the science of it. Something for you to think about & play with one day.
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Grumpy Old Diesel Owners Club group I no longer question authority, I annoy authority. More effect, less effort.... 1967 230-6 auto parts car. rust bucket. 1980 300D now parts car 800k miles 1984 300D 500k miles 1987 250td 160k miles English import 2001 jeep turbo diesel 130k miles 1998 jeep tdi ~ followed me home. Needs a turbo. 1968 Ford F750 truck. 6-354 diesel conversion. Other toys ~J.D.,Cat & GM ~ mainly earth moving |
#83
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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! |
#84
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I dont believe that you wouldnt have a couple in pieces that you wanted to find out how they worked. Any oldish car should have one !! The local electronic shop probably has them in their rubbish. I would have thought that you could come up with an even better inductive sensor !!
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Grumpy Old Diesel Owners Club group I no longer question authority, I annoy authority. More effect, less effort.... 1967 230-6 auto parts car. rust bucket. 1980 300D now parts car 800k miles 1984 300D 500k miles 1987 250td 160k miles English import 2001 jeep turbo diesel 130k miles 1998 jeep tdi ~ followed me home. Needs a turbo. 1968 Ford F750 truck. 6-354 diesel conversion. Other toys ~J.D.,Cat & GM ~ mainly earth moving |
#85
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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! |
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