Amazing, Chevy builds a 330 HP engine with 28mpg Options

[Hawktel]

So the new Impalla that chevy has released has a option for a 330 HP V8 with 28 highway fuel consumption.

Thats amazing. Just amazing. I wonder how far fuel efficency can be pushed?

[Dr. Roger]

QUOTE (Mueller @ Sep 27 2005, 07:16 PM)

QUOTE Pop quiz: How does a Ferrari valve get a larger lift profile than the what's ground into their cam? at least for one motor, they a few different profiles on one lobe, the cam shaft moved back and forth to increase/decrease the lift..more than likely not what you are talking about (IMG:http://www.914world.com/bbs2/html/emoticons/sad.gif) pushrod force? 3.5K#'s???

Ferrari uses something like a V-tec engine. V-TEC stands for Variable Valve Timing and Lift Electronic Control.

The Vtec solenoid pumps fluid into a small pinion, which engages a different lifter which makes 2 valves work off of 1 cam lobe instead of each valve having it's own lobe..In essense in a DOHC(Dual Overhead Cam) car you get the benefits of 4 camshafts.. 2 different intake cams and 2 different exhaust cams (due to the profile change.

QUOTE

From Honda - i-VTEC The 'intelligent' VTEC Since the creation of the revolutionary VTEC system, Honda has advanced engine efficiency even further, with the invention of i-VTEC. The 'i' denotes an even more 'intelligent' power-plant. This evolution of Honda's renowned VTEC technology employs Variable Timing Control (VTC), which allows the engine to vary its intake camshaft phasing. This means that the intake ports are able to open and close earlier or later, providing precisely the right amount of fuel and air at exactly the right time for driving requirements. The result is better fuel economy and low emissions because the system virtually precludes the exhaust of unburned fuel. Now that's intelligent! i-VTEC is found in Honda's CR-V, Integra, Odyssey, Accord and Accord Euro cars.

Is this what you were thinking about Jim? (IMG:http://www.914world.com/bbs2/html/emoticons/smile.gif)