Autoblog

Click above for high-res gallery of GM's new powertrain facility

General Motors dedicated its new Powertrain Engineering Development Center in Pontiac, MI on Friday. On hand were CEO Rick Wagoner, Powertrain EVP Tom Stephens and the usual array of elected officials trumpeting their involvement in making the new facility happen. Prior to the speech making and pushing of the ceremonial start-up button, we got a tour of the new 450,000 square foot facility that GM proclaims as the largest, most advanced powertrain development center in the world.

VP of powertrain engineering Dan Hancock explained that the center will be responsible for developing the systems that comprise GM's advanced propulsion strategy. GM is consolidating powertrain development operations from four facilities in Southeast Michigan at this new Pontiac location. When the 1,200 relocating staff have moved in there will be 4,300 staff on site. GM is using new systems being implemented to move forward with its Road to Lab to Math (RLM) strategy that will help reduce engineering development costs. The center will lead development of all manner of future GM powertrains from new gas and diesel engines to hybrid systems and the E-Flex system that will power the Volt. Read on to learn about some of the new systems GM is putting in place to help improve its powertrains.


[Source: General Motors]

Lexus is billing the IS-F as "Everything you thought we weren't," and the potential is certainly there. The engine bay is filled with 5 liters of 4-valve V8 putting out 416 horsepower and 371 pound-feet of torque. The Minilite-esque wheels hide a Brembo braking system with six piston front calipers and cross-drilled rotors 14.2 inches in diameter. The sill extensions wrap up the front fenders to form a styling detail reminiscent of extractor vents, and the rest of the body has been tweaked in the wind tunnel to improve high speed aerodynamics. It all sounds good when you read the spec sheet, and the car does at least look aggressive . What everyone's dying to know, though, is "has Lexus done it this time?" Automobile magazine had the same burning curiosity, and they just also happened to have an IS-F sitting in their lot.

In no time, they headed over to their local Dynojet. The result? Well, they're a little disappointed, and they're calling the torque delivery peaky. Looking at the dyno graph, we're not sure we'd agree entirely with that assessment. There's at least 225 lb-feet at the wheels from 1,800 rpm, topping out at 318 lb-ft. First, let's point out that 15 percent torque loss through a drivetrain including an eight speed automatic is pretty phenomenal. Secondly, the torque curve is pretty fat below the peak. What is surprising to everyone, though, is the way the power drops off precipitously on the other side of the 5,200 rpm peak. You'd think an engine with 4-cams and Yamaha-designed cylinder heads would be a revver. Of course, there are lies, damn lies, and statistics and these dyno results are sure to kick up some debate. What still remains to be seen is how the entire package works when pitted against its bogeyed competition. For that, we must still wait.

[Source: Automobile, photo: Automobile]