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AutoNotes #3, 07/26/92                   copr. 1992, Dave Williams
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  BIX: 'dave2'      RIME at ->CHAOS    [email protected]
  CIS: 72571,3542   The Courts of Chaos BBS, (501)985-0059
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Porsche's new 968 uses a 3 liter (180 cubic inch) four with variable cam timing. The Porsche system twiddles slack in the timing chain to change cam phasing. Claimed power output is 240bhp. I'm getting suspicious of some of these new bhp claims - are we heading toward a new "advertised horsepower" age, like the 1960s? 1.33 hp/cube from a normally aspirated, '92-smog-legal 180-inch four crowds the edges of my bogosity sensor. The six-speed manual trans may be a tip that the powerband is crowded up to the top of the curve, though Porsche claims the engine has "massive torque", whatever that is... The 968's 0-60 of 6.9 seconds isn't very impressive for 240bhp, though they claim a top speed of 156mph. EPA fuel consumption is 22.8 mpg, also nothing to brag about, particularly with variable valve timing and modern engine management systems.

Toyota is playing with ultrasonic vibrating mirrors. They're supposed to clear themselves of raindrops in 15 seconds. They're also electrically heated for wintertime.

Coates International of NJ has dreams of getting automakers to replace their poppet valves with Coates' improved rotary valve design. The exploded view of their prototype head for a Mercedes six shows two gear driven overhead rotary valve shafts, twelve actual valves, twelve bushings, twenty-four assorted seals, four ball bearings, a reasonably complex two-piece head which probably requires special hobbing equipment to machine for the rotary valve pockets, and assorted bric-a- brac. Their valve system requires the intake and exhaust air streams to make two right-angle bends instead of the one of a poppet system. Coates also claims their converted M-B engine meets emissions without a catalytic convertor, requires oil changes at 50,000 miles, requires less oil because none is needed at the top end of the engine (what about those bushings and bearings?), 10% less valve friction than poppets, 18% better fuel economy, idle speeds of 250 RPM, and greatly reduced octane requirements. And if you believe all that, I have a nice bridge for sale...

BMW is building a new assembly plant in Spartanburg, SC. Why? Even UAW's goons will work cheaper than German labor, though you'd think millions of ex-East-Germans would work cheap. Kinda reminds me of VW's attempt at US assembly back in the '70s.

General Motors Acceptance Corp (GM's financing arm) got shafted for a $436 million fraud involving a NY Buick dealer who financed a bunch of vans that didn't exist. GM disciplined, transferred, retired, or demoted much of GMAC's management, but claims no GMAC employees were conspirators in the "alleged" fraud. Ri-ight. Hey, can I finance that bridge?....

25% of all Chevrolet Caprices are sold as police cars.

It's positively Orbital: Jaguar is one of the latest to jump on the Orbital two-stroke bandwagon. They're talking about replacing the V12 with a blower-scavenged 2-stroke V6. But wait! The Orbital doesn't use blower scavenging, right? Right! This confused me for some time, until I realized a majority of the companies claiming Orbital licensing are only interested in Orbital's oddball pneumatic fuel injection system, not their overall design.

V10 Again: Ford is now talking about expanding their modular V8 (that's the 4.6 SOHC) to a 7-liter V10 for use in E and F series trucks and vans. My, that's quite a displacement jump for just two cylinders. Why are they doing this? Ford claims it's to ward off competition from - (fanfare) Toyota's new T100 line of pickups.

The V10 is an idiotic layout for an engine. It can't be balanced without Lanchester-type shafts. If you're going to go more than eight cylinders, the only reasonable step is twelve, which is in perfect balance no matter what the cylinder bank angle. Alas, it seems to be a fad, much like the five cylinder craze that went around when Audi stretched their four. In Audi's case, it made sense - they couldn't justify an all-new engine, and they'd already bored and stroked the old one as far as it would go. They bit the bullet and tacked on an extra cylinder. BTW, Audi has finally phased out the 5 except for one model, and will soon have everything converted to their new V6.

Opel's new V6 has a 55 degree cylinder bank angle instead of the "proper" 60 degrees. I doubt anyone would notice, considering the number of 90 degree V6s in the market. The Opel will be a DOHC, four valve, all-aluminum unit of 2.5 liters.

Ford's Sierra (known in the US as the Merkur XR4Ti) bites the dust next year. It will be replaced by a new FWD platform that looks something like an obese Probe. The platform will be shared with the Tempo/Topaz in the US. The now-defunct British magazine Auto Performance called the Sierra "vaguely amphibious," which is about as kind as could be expected.

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