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!!! |
wndsrfr |
Mar 9 2015, 06:55 AM
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#2
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Senior Member Group: Members Posts: 1,430 Joined: 30-April 09 From: Rescue, Virginia Member No.: 10,318 Region Association: MidAtlantic Region |
YIKES!! Really risky to change timing or fueling without AFR's....detonation lurks there....especially when leaning it out!!!
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toon1 |
Mar 9 2015, 10:04 AM
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#3
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Senior Member Group: Members Posts: 1,849 Joined: 29-October 05 From: tracy,ca Member No.: 5,022 |
YIKES!! Really risky to change timing or fueling without AFR's....detonation lurks there....especially when leaning it out!!! No risk at all (IMG:style_emoticons/default/smile.gif) , I have a Dakota digital CHT gauge. If any ill affect of leaning the AFR were to happen I'd know instantly. The timing at 26-2700rpm (cruise speed) was 25-26*BTDC,( I think I can go more) well within stock timing range. With MS you can alter how fast the timing comes in, which, I'm finding makes a big difference. You can also alter areas of cruise, which makes a big difference. The only detonation(pinging) that I noticed was at the upper rpm's while having my foot in the gas. Again more tuning needed in that area. Surprisingly, as I leaned out the cruise areas the cht's got COOLER. Seems counter intuitive, I have an idea why this is but can't say for sure. It would be a great question for Jake. |
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