39MPG, got it today!! |
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39MPG, got it today!! |
toon1 |
Mar 8 2015, 10:19 PM
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#1
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Senior Member Group: Members Posts: 1,849 Joined: 29-October 05 From: tracy,ca Member No.: 5,022 |
I've been working with Megasquirt with timing and Fueling. The car has been responding well to the changes.
I had to take a trip to the foothills today and decided to take the 914 and really test the changes. Most of the driving I had been doing had been around town so I wasn't sure how the car would respond to a long freeway trip. while cruising up hwy 5 the cht's were 340.....I pulled up Tuner studios and leaned out the area around cruise a bit. Suprisingly the CHT's dropped about 5 * and were stable. I kept the setting there and was wondering how this would be when I started climbing hills, again I was suprised how good the head temps were. nothing over 370(which was for a very short time) on the long climbs. I don't have my 02 sensor connected yet so I can't say what the AFR is. At the end of the trip, I drove 176miles and it took 4.5 gallons to refill....39.1mpg......NICE!!! |
Mikey914 |
Mar 11 2015, 08:24 AM
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#2
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The rubber man Group: Members Posts: 12,678 Joined: 27-December 04 From: Hillsboro, OR Member No.: 3,348 Region Association: None |
Stock 1.7 will get mid 30's on the freeway. So 39 is not too far out for a more efficient metering system. However, if you truely want to tune it you need EGT. CHT is good as a trend, but EGT tells you whats happening at that moment. If you want to get every last MPG you would need a probe for each cylinder. Take the temp to peak and back it down about 50-75 degrees for each cylinder. If you could do that, you would reach the limits of the MPG, also run a higher octane, as it with be less prone to detonation.
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