So many things happen... 70s gas shortage... force overdrive into cars. lower cruising rpms from 3500 to 2500. 80s designed with intake runners for more low end torque sooner and lower rpms..., overdrive rpms dropped to 2100 rpms now. Cutting rpm by 1/3 cut wear by over 1/2...... Gigantic heavy pistons that would bell out the cyls changed to aluminium tiny pistons at 1.3 the weight, off set rod ends to stop the piston twist at end of stroke, and even low friction coatings on the piston skirts.. Induction hardend cyl walls, HUGE change in oil and additives in the 80s and beyond.. All contribute to the longevity of the new engines even further. More gears in tranny to keep engines at or near lower 1700 rpm at peak torque also drive more gains. No need to ever run an engine over 2800 rpms in normal driving any more. Not uncommon to pull and engine down at 100,000 miles and still see the factory hone marks on the cyl walls and anti friction coating still on piston skirts. variable cam phasor timing is common, overhead cams, turbos and super chargers, precise timing and fuel mapping. Variable Fuel injection and hei ignition on each cyl. Even roller cams on stock engines for more hp from smaller sources.
Yes, we've come along way on my watch. From points and plugs every year! Valve job at 50k. Overhaul at 70k. Black streaks at all intersections where cars idled at red lights. Oil change every 3000 miles. Tires every 10k if you were lucky. Antifreeze change every year. brakes every two years. Clutch at 30k. Remember when I was a kid, and we had a cold front. Almost every car in the neighbor hood would not start. A few of the men had to go around an start these flooded cars for everyone else. Overheating in the summer time was normal. No power steering, No power brakes. most had manual choke and 2ply tires.
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Today's Featured Article - Listening to Your Tractor - by Curtis Von Fange. Years ago there was a TV show about a talking car. Unless you are from another planet, physically or otherwise, I don’t think our internal combustion buddies will talk and tell us their problems. But, on the other hand, there is a secret language that our mechanical companions readily do speak. It is an interesting form of communication that involves all the senses of the listener. In this series we are going to investigate and learn the basic rudimentary skills of understanding this lingo.
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