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Dyno Graph - Real Wheel Horsepower
- Dyno Graph - Real Wheel Horsepower
 Going beyond the dyno graph...Spend enough time comparing dyno sheets and you will begin to wonder why so little information is normally considered enough. In the real world, most numbers come with additional data, data that is necessary to make a full decision. For example, if we said "John has been on a diet for six months and hasn't lost any weight at all," you might assume that his diet is terrible. Of course, if we continued by saying, "but he gained 15 pounds of muscle mass, can now bench three times his body weight, and finished a half-marathon on his first try," you would get the full picture, proof that John's diet and exercise plan was working well. The same can be said for the dyno. For instance, if we said, "Installing the new intake manifold and cylinder heads only picked up five rear wheel horsepower," the natural reaction would be to think they weren't worth the money. Completing that sentence with, "however, looking at the datalogs showed a 3-psi drop in overall boost, a 35-degree drop in incoming air temperature and a slightly lean condition throughout the run," we would know that the new combination was actually much more efficient and capable of making significantly more power, assuming we could get the missing boost back and add enough fuel in the tune up to compensate for the increased airflow. You see, you can't ever go off horsepower and torque alone, they just don't tell enough of the story, which is why looking at and understanding datalogs is essential.. Photo Gallery: Dyno Graph - Real Wheel Horsepower - GM High-Tech Performance Magazine
Photo Gallery: Dyno Graph - Real Wheel Horsepower - GM High-Tech Performance Magazine
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2002 & 1998 Chevy Camaros - Deja Vu
- 2002 & 1998 Chevy Camaros - Deja Vu
 R.P.M. Motorsports builds two Camaros that are as similar as they are different-one a 9-second SS nitrous car, the other a single-turbo Z28 rocket.Above these words are two completely different cars, built for completely different purposes for two completely different owners. On paper, they don't sound anything alike. One features a 402 cubic-inch LSX block with a single turbocharger and the other has a stock cubic-inch LS1 stuffed under the hood that huffs nitrous from a single fogger kit. One car rides on drag radials, the other on a slick. Silver SS, Silver Z28. It's amazing then to consider that these two cars are actually extremely similar in personality and form, even though they differ so drastically in function. So similar, in fact, that even after spending hours around them, it's hard to tell each apart, even knowing the differences. Photo Gallery: 2002 & 1998 Chevy Camaros - Deja Vu - GM High-Tech Performance Magazine
Photo Gallery: 2002 & 1998 Chevy Camaros - Deja Vu - GM High-Tech Performance Magazine
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Cylinder Heads Replacements - Clean Cast And Fast
- Cylinder Heads Replacements - Clean Cast And Fast
 Can an "as cast" cylinder head make big power and keep money in your pocket?In a world of CNC-this and CNC-that, is it possible to build anything worth a buck using regular old cast aluminum and some quality design? It's a question the aftermarket has been trying to answer for years and one that until recently, no one had really seemed to get right. Sure, GM has had some great results with "as cast" cylinder heads in the past, but we're talking about bolt-on performance here, not just run of the mill factory stuff. Enter Racing Head Service (RHS) and the company's new line up of Pro Action "Clean Cast Technology" cylinder heads, which are being cast to improve horsepower without the cost, downtime and hassle of a CNC-ported competitor. According to RHS, these "LS cathedral port heads combine race-proven head design and Clean Cast Technology to create 'as cast' ports that flow like they've already been ported." With both a 205cc and 225cc version of the heads that cost just under 600-dollars apiece, the idea sounded great to us on paper and we knew it was a must-test piece for 2011. Photo Gallery: Cylinder Heads Replacements - Clean Cast And Fast - GM High-Tech Performance Magazine
Photo Gallery: Cylinder Heads Replacements - Clean Cast And Fast - GM High-Tech Performance Magazine
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