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Old 09-08-2008, 04:19 PM   #7 (permalink)
cfg83
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Join Date: Dec 2007
Location: Southern California
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1999 Saturn SW2 - '99 Saturn SW2 Wagon
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gasti_ako -

Quote:
Originally Posted by gasti_ako View Post
Thanks bro for the reply. I have further questions:

For driving here are my questions:

they say that in neutral driving, the air-fuel mixture is 1:1 as compared to geared, the ratio is lower in favor of the air. since the ECU thinks that you are going to do an engine break. how true is this?

For tires can you suggest a specific magwheel combined with a specific tire with low resistance rolling?
This doesn't sound right, but I may not understand your question. Under normal driving conditions in the USA, the Air/Fuel ratio is 14.7 parts air to 1 part fuel (14.7:1). The car's ECU tries to maintain this Air/Fuel ratio most of the time. Running "lean" means increasing the amount of air. For example, a lean ratio could be 16:1. Running "rich" means decreasing the amount or air. For example, a rich ratio would be 13:1.

Many newer cars will run lean "by design" when the car is decelerating in gear. Some cars will cut off the fuel completely until the car's normal "idle RPM" is reached.

All cars will run rich when the driver is driving for performance.

The 14.7:1 ratio is used because the emission standards in the USA require this ratio. Otherwise, the catalytic converter won't function properly.

What are the emissions rules in the Philippines? Do you have a catalytic converter on your car?

I agree that a bicycle/scooter/motorcycle would be better, but I also think you get a lot of rain, so it isn't practical for work. Can you commute with a coworker?

CarloSW2
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