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Originally Posted by War_Wagon
I realize this post is close to being in the Unicorn corral...
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Why would you say that? A fuel economy camshaft isn't exactly a Pogue 200mpg carburetor or anything.
I've worked with a local cam grinder on several projects. I'll say this; of all the engine guys I've encountered, it's usually the cam grinder that understands the internal combustion engine the best.
However, they are no magicians, I've never had a camshaft turn chicken $hit into chicken soup. Like any businessman, they do have sales to make, door to keep open, and can typically do a much better job in tailoring a grind for a specific use, where the OEM's have to come up with a grind that is used over a broad spectrum. I wouldn't expect him to improve on a 3tech or Xfi grind, without several test cams being tried (some may be worse, some may work a tiny bit better).
When you talk with him, make sure to tell him GM offered a fuel mileage version of the metro, with a different cam, be sure to share both standard and Xfi specs with him. He might be able to offer something with closer seat timing and a somewhat faster ramp, that might increase cranking compression without loosing much higher rpm torque. Maybe. But we aren't talking 'phenomenal results', here.