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Ford finds flex-fuel engine design plays big role in emissions output

How bad is ethanol for your engine? There's been a lot of debate on this issue as the US considers upping the biofuel content in the national gasoline supply from 10 percent (E10) to 15 percent (E15). The ethanol industry and some scientists say higher ethanol blends show no "meaningful differences" in new engines while the oil industry says ethanol creates health risks. Researchers working at the Ford Research and Innovation Center decided to take a closer look at how a wide range of gas-ethanol blends - E0, E10, E20, E30, E40, E55 and E80 - affected the emissions coming out of a flex-fuel 2006 Mercury Grand Marquis. To see the full report, printed in the journal Environmental Science & Technology, requires payment, but there is an abstract and Green Car Congress has some more details. The gist is that, "with increasing ethanol content in the fuel, the tailpipe emissions of ethanol, acetaldehyde, formaldehyde, methane, and ammonia increased." At least NOx and NMHC emissions decreased. The researchers say that the effects are due to the fuel and "are expected for all FFVs," but that the way that a manufacturer calibrates the engine will affect NOx, THC, and NMOG emissions. It's this last bit that's important, since the researchers found, "Higher ethanol content in gasoline affects several fundamental fuel properties that can impact emissions. ... These changes can have positive or negative effects that can depend on engine design, hardware, and control strategy. In addition to direct emissions impacts, higher ethanol content fuel can also provide more efficient combustion and overall engine operation under part-load conditions and under knock-limited higher-load conditions." So, as we head towards more ethanol in our fuel supply (maybe), manufacturers are going to need to learn how to burn it most efficiently.

XCAR stages epic drag race between Ford GT40, GT70 and GT

XCAR has put together what it believes is a first - a drag race between Ford's legendary, Le Mans-winning GT40, the more recent GT supercar it inspired and the little-known GT70 rally car. The three mid-engined monsters were all built for very different purposes, and not surprisingly, they come to battle with very different powertrains.
The GT40 is powered by a thumping, naturally aspirated V8. This example, which looks like a Mark IV model, is likely powered by a 7.0-liter engine, although it's not entirely clear how much power it's putting down. The GT70, meanwhile, was Ford's response to the Lancia Stratos. Considering that the Lancia is one of the greatest rally cars in history and many of you are probably just hearing of the GT70 for the first time, you can imagine how much success Ford had with it. Only six were produced before a change in regulations doomed this mid-engined rally car.
The Ford GT, meanwhile, doesn't really need an introduction. 550 horsepower is on offer from a 5.4-liter, supercharged V8, which keeps the GT competitive even against more modern supercars. 60 miles per hour arrives in well under four seconds while the top speed sits at 212 mph. Not bad for a car that went out of production in 2006.

2015 Shelby GT350 Mustang sounds racy as it revs [UPDATE]

UPDATE: It seems as though the GT350 exhaust was just too hot for YouTube. The video has been removed, as you can see. We'll keep combing the Interwebs for a new version. If you're somehow still on the fence about the 2015 Ford Shelby GT350 Mustang, then this video should provide some healthy encouragement about the new coupe. There's no high-speed action here, but you get to experience the wonderful sound of the GT350's 5.2-liter V8 with a flat-plane crankshaft start up, idle and throw some revs. At a twist of the key, the engine barks to attention, and a wonderfully crisp shriek comes from the exhaust when the driver blips the throttle. The GT350 even has a growly baritone at idle. According to the YouTube description, this car was on hand at the Carroll Shelby Tribute and Car Show in Gardena, CA. Unfortunately, videos online might be the best chance for many people to hear the wail of the latest GT350 for now. Ford is only building a total of 137 of them for the 2015 model year, but the numbers should pick up when the 2016 model year begins in just a few months.