The greater your car’s contact patch, the more power it takes to move. How much of your car’s driveline robs you of power? And though it may sound like an old saw, tire inflation and tire/wheel sizing are also factors in sluggishness. Low-tension piston rings and more liberal clearances mean some sacrifice of durability. When you go with low-friction components like roller tappets and rocker arms, you gain, but you also spend. Keep in mind that it’s always a tradeoff.
ADVANCES IN IC ENGINES PPT HOW TO
So how to reduce friction and free up power? It’s insulting to efficiency experts everywhere. This means we harness barely 25 percent of the fuel’s BTUs (British Thermal Units). Did you know your engine wastes 70-75 percent of the heat energy generated from fuel/air light off? Fifty percent out the tailpipe and 25 percent via the cooling system. And consider how much heat energy is lost to the atmosphere that does nothing for power. Consider the power lost to internal friction, components that consume untold amounts of power just to move them. Think about this for a minute: Your engine actually produces more power than it delivers.
ADVANCES IN IC ENGINES PPT PROFESSIONAL
Ignition timing with electronic engine control calls for a professional who knows how to dial in both ignition and fuel maps to where you get power without doing engine damage. If you have a sudden lean condition coupled with early timing, you can have engine failure in a nanosecond at wide-open throttle. Anything beyond 36 degrees BTDC total represents risks due to detonation.
Some tuners go to 38, 40, and even 42 degrees BTDC, which is foolish. Never take total timing beyond 36 degrees BTDC. Then, move timing one degree at a time – 33, 34, 35 and so on along with road/dyno testing. With conventional distributor ignition systems, set total timing at 2500 rpm beginning your efforts at 32 degrees BTDC (Before Top-Dead Center) with a road test or dyno pull. Ignition timing is also a power dynamic you should play with carefully because too much of it can damage your engine. The lesson here is it all adds up to significant total gains in horsepower. A potent spark from a high-energy ignition system does make a difference in power no matter how small. A misfire or lackluster light off means lost power, wasted fuel and increased tailpipe emissions. The reason: precision ignition operation means power. Original equipment grade is your best approach or high-end aftermarket parts like MSD.
When it’s time to replace ignition components, opt for the best high-performance ignition parts you can find, meaning coils, ignition wires and platinum tip spark plugs. And spark plugs still need to be changed periodically. The fact remains, car maintenance still should include ignition systems. Because ignition systems have become low maintenance in the past 20 years, we don’t check them until we get a misfire and a "Check Engine" light.
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