Re: Maybe with in 5 to 10 % higher than you - Saab NG900 & OG9-3 Bulletin Board - Saabnet.com
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Re: Maybe with in 5 to 10 % higher than you
Posted by Jim Moore [Email] (more from Jim Moore) on Thu, 20 Mar 2008 18:24:42
In Reply to: Re: Maybe with in 5 to 10 % higher than you, Seth, Thu, 20 Mar 2008 17:22:13
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I spend far too much time pondering this question myself. I don't think the time spent idling is the issue; the car is using gas while idling, you are going nowhere, and that should lower the MPG's both with the SID and the traditional calculation. I think it works like this (however, I could be all wrong). The computer is programmed with the theoretical flow rate of the injectors. The computer monitors both the total time that the injectors are open and how many miles are being driven and calculates accordingly. The "error" comes from the difference in the actual flow rate of the injectors and the value programmed. My 1995 900S has always showed a few percent lower on the SID than actual, while my 2006 9-3SC shows a few percent higher on the SID. Just my thoughts. Comments?
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