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**Preorbtat** · 11-16-2006, 05:04 AM

What forum is this?

www.newcelica.org excellent site for celicas and get into the nitty gritty of performance modifications. a lot of what is discussed can apply to virtually any car though.

as with cars with ecu's they tend to advance the timing so that they run on the leaner side of things. producing hotter running and less fuel being used but thats at a minimal and normally with in engine mapping spec.

Timing does not have much to do with the fuel mixture. Timing controls the valves and when the detonation occurs past TDC (depending on car and application).

The fuel mixture (lean or rich) is determined by the ECU through the MAFS, the O2 sensors and throttle positioning.

And burning hotter is a BAD thing. it causes premature detonation which can destroy an engine and causes other problems in the long run. Running to lean causes other problems as well, like bogging on acceleration and such.

I wouldn't put anything else but stock parts on a old engine that has ran many miles.

K&N is a good quality brand, performance and economy are debatable and I believe performance parts are functioning better when more parts of the engine are being tuned.

Why waste money on a expensive airfilter for economy? The money you pay for it is probably equalling the amount of money that you might save out on fuel.

It's just a meaningless gadget.

Most people don't buy these things for economy but for performance. To a person who wants the most out of his engine will spend a few extra dollars to get the parts that let him do it. It's not meaningless, it's car enthusiasm.

I do agree tho, most parts out there don't do what they say. Take the Tornado for example. a $60 item at one time and most people who actually bought them said they got worse mileage and dyno's showed a loss in performance. Another is that fuel magnet thing. does absolutely nothing.

11-16-2006, 05:04 AM	#54
Preorbtat Join Date Oct 2005 Posts 455 Senior Member	What forum is this? www.newcelica.org excellent site for celicas and get into the nitty gritty of performance modifications. a lot of what is discussed can apply to virtually any car though. as with cars with ecu's they tend to advance the timing so that they run on the leaner side of things. producing hotter running and less fuel being used but thats at a minimal and normally with in engine mapping spec. Timing does not have much to do with the fuel mixture. Timing controls the valves and when the detonation occurs past TDC (depending on car and application). The fuel mixture (lean or rich) is determined by the ECU through the MAFS, the O2 sensors and throttle positioning. And burning hotter is a BAD thing. it causes premature detonation which can destroy an engine and causes other problems in the long run. Running to lean causes other problems as well, like bogging on acceleration and such. I wouldn't put anything else but stock parts on a old engine that has ran many miles. K&N is a good quality brand, performance and economy are debatable and I believe performance parts are functioning better when more parts of the engine are being tuned. Why waste money on a expensive airfilter for economy? The money you pay for it is probably equalling the amount of money that you might save out on fuel. It's just a meaningless gadget. Most people don't buy these things for economy but for performance. To a person who wants the most out of his engine will spend a few extra dollars to get the parts that let him do it. It's not meaningless, it's car enthusiasm. I do agree tho, most parts out there don't do what they say. Take the Tornado for example. a $60 item at one time and most people who actually bought them said they got worse mileage and dyno's showed a loss in performance. Another is that fuel magnet thing. does absolutely nothing.
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