Page 20 of 20 FirstFirst ... 10181920
Results 191 to 198 of 198

Thread: Alternator delete with regen braking modification for better MPG

  1. #191
    Just A Mirage!
    Join Date
    Mar 2018
    Location
    Arizona
    Country
    United States
    Posts
    83
    Thanks
    6
    Thanked 21 Times in 18 Posts
    Quote Originally Posted by Daox View Post
    This may be the eventually way I go. That opens up a lot of possibilities for other fun mods...
    Arduinos are great for when you need a lightweight device that lives on the CANBUS permanently (say, to drive a little 1" OLED display for showing a custom gauge/data). For exploring/debugging projects, I find my RaspberryPi with the PiCAN shield and a 7" display is far more useful since you get a full linux desktop with OBD and network access built in. Just my $0.02, I've been down that road


        __________________________________________

        click to view fuel log View my fuel log 2017 Mirage GT 1.2 automatic: 37.5 mpg (US) ... 15.9 km/L ... 6.3 L/100 km ... 45.0 mpg (Imp)


  2. The Following 2 Users Say Thank You to phaux For This Useful Post:

    Daox (09-06-2019),Loren (09-06-2019)

  3. #192
    Moderator Eggman's Avatar
    Join Date
    Sep 2015
    Location
    Cleveland, Ohio ☼
    Country
    United States
    Posts
    6,080
    Thanks
    3,165
    Thanked 1,603 Times in 1,213 Posts
    Quote Originally Posted by phaux View Post
    For exploring/debugging projects, I find my RaspberryPi with the PiCAN shield and a 7" display is far more useful since you get a full linux desktop with OBD and network access built in. Just my $0.02, I've been down that road
    It would be cool if it could do TPMS.

        __________________________________________

        click to view fuel log View my fuel log 2015 Mirage ES 1.2 manual: 49.9 mpg (US) ... 21.2 km/L ... 4.7 L/100 km ... 59.9 mpg (Imp)


  4. #193
    Administrator Daox's Avatar
    Join Date
    Jan 2013
    Location
    Germantown, WI
    Country
    United States
    Posts
    4,760
    Thanks
    2,656
    Thanked 1,573 Times in 912 Posts
    I've been looking around and I found another gauge that I am going to pick up instead of the one I have. It doesn't have as many gauges, but I think it will work a lot better. It specifically says that it measures current in both directions and adds and subtracts from Ah used.

    DROK DC 0-300V 200A STN LCD Display Digital Multimeter Voltage Ampere Power Energy Ammeter Voltmeter Battery Volt Amp Meter AH Monitor Panel with Hall Sensor



    Custom Mirage products: Cruise control kit, Glove box light, MAF sensor housing, Rear sway bar, Upper grill block

    Current project: DIY Nitrous oxide setup for ~$100

        __________________________________________

        click to view fuel log View my fuel log 2015 Mirage DE 1.2 manual: 46.5 mpg (US) ... 19.7 km/L ... 5.1 L/100 km ... 55.8 mpg (Imp)


  5. #194
    Moderator Eggman's Avatar
    Join Date
    Sep 2015
    Location
    Cleveland, Ohio ☼
    Country
    United States
    Posts
    6,080
    Thanks
    3,165
    Thanked 1,603 Times in 1,213 Posts
    Quote Originally Posted by Daox View Post
    Yep, my trips are almost all above 60 mpg. My last tank was the best yet, and I did the mod partway through it.

    Hey Daox, about when (as in where in your chart) do you think you changed the oil in your transmission?

    Found it. Dated 3-Jun-2019
    Quote Originally Posted by Daox View Post




    Alright, yesterday was the day. I put the MT-LV in the Mirage. This new transmission oil is definitely thinner than the OE spec fluid. My engine was still a bit warm, and the oil coming out was still thicker than the oil going in. Also, it was interesting to see that the oil is actually red in color. The OE oil was a like a slightly browned engine oil, but the new oil was... well take a look. I am guessing this oil is much more akin to ATF than traditional manual trans oil.





    Initial impressions are that the transmission does shift a little smoother. Ambient temperature was about 65F though, so it was already warmish.

    The car currently has 85,002 miles on it. The plan is to send in a transmission fluid sample after about 5k miles. This will likely take me about a year to do since I do not commute very far.
    If I interpret your info correctly, this last tank includes the new thinner MT-LV manual transmission lubricant.
    Last edited by Eggman; 09-07-2019 at 01:35 AM.

        __________________________________________

        click to view fuel log View my fuel log 2015 Mirage ES 1.2 manual: 49.9 mpg (US) ... 21.2 km/L ... 4.7 L/100 km ... 59.9 mpg (Imp)


  6. #195
    Senior Member
    Join Date
    Dec 2017
    Location
    the Netherlands
    Country
    Netherlands
    Posts
    122
    Thanks
    9
    Thanked 56 Times in 37 Posts
    Quote Originally Posted by Daox View Post
    I would say the LRR tires are good for 2-3 mpg gain, the alternator delete is good for about the same.
    That's still too optimistic, I'm afraid. A gallon of petrol equals to about 9.45kWh. (Still 10kWh/L, engine efficiency 25%). So a car on 50mpg runs 50m/9.45kWh, which equals 0.189kWh/mile. To gain 2mpg, that has to be 4% lower, which is 0.0076kWh/mile = 7.6Wh/mile, which is 0.63Ah/mile at 12V.
    Your average speed is 28miles/h, so the saved current should be 17.6A. But you wrote the car uses about 8A. (4Ah in half an hour), which is less than a half, so the gain is less than 1mpg.

    Maybe the car uses 17.6A with headlights on. In that case 2mpg could be gained, if you charge the battery from another source. Charging from regeneration is unrealistic, as you should be regenerating at 100A for about 20% of the time.

        __________________________________________

        click to view fuel log View my fuel log 2013 Space Star Cleartec Intense 1.0 manual: 54.2 mpg (US) ... 23.0 km/L ... 4.3 L/100 km ... 65.1 mpg (Imp)


  7. #196
    Administrator Daox's Avatar
    Join Date
    Jan 2013
    Location
    Germantown, WI
    Country
    United States
    Posts
    4,760
    Thanks
    2,656
    Thanked 1,573 Times in 912 Posts
    You're right. The numbers don't exactly correspond. Something to mention is on EcoModder, someone suggested that my fancy ammeter may not be very accurate. I was hoping to help verify its accuracy with another gauge at some point.

    One thing to note that helps the numbers get closer is to take into consideration that alternator efficiency is around 50%.

    The closest testing I can point you toward is MetroMPG's testing on his Pontiac Firefly (Geo Metro). It is here:

    https://www.metrompg.com/posts/alternator-optional.htm

    Custom Mirage products: Cruise control kit, Glove box light, MAF sensor housing, Rear sway bar, Upper grill block

    Current project: DIY Nitrous oxide setup for ~$100

        __________________________________________

        click to view fuel log View my fuel log 2015 Mirage DE 1.2 manual: 46.5 mpg (US) ... 19.7 km/L ... 5.1 L/100 km ... 55.8 mpg (Imp)


  8. #197
    Administrator Daox's Avatar
    Join Date
    Jan 2013
    Location
    Germantown, WI
    Country
    United States
    Posts
    4,760
    Thanks
    2,656
    Thanked 1,573 Times in 912 Posts
    Today it was rainy and dark out, so on went the headlights and some wiper use. The trip using those accessories over doubled the power usage. This does include regen as well.

    I got the new gauge, but haven't installed it yet.

    Name:  IMG_20190910_072612160.jpg
Views: 118
Size:  93.4 KB
    Custom Mirage products: Cruise control kit, Glove box light, MAF sensor housing, Rear sway bar, Upper grill block

    Current project: DIY Nitrous oxide setup for ~$100

        __________________________________________

        click to view fuel log View my fuel log 2015 Mirage DE 1.2 manual: 46.5 mpg (US) ... 19.7 km/L ... 5.1 L/100 km ... 55.8 mpg (Imp)


  9. #198
    Administrator Daox's Avatar
    Join Date
    Jan 2013
    Location
    Germantown, WI
    Country
    United States
    Posts
    4,760
    Thanks
    2,656
    Thanked 1,573 Times in 912 Posts
    For whatever reason, the alternator delete circuit stopped working the other day. I am guessing it's probably a bad solder joint since it's acting like it an open circuit and charging at 15V. The thing has just been flopping around in my center console for weeks now.

    So today's commute was done with the alternator on. I put the fuse back in place of my circuit. It was abnormally light traffic so I was able to push the mileage pretty high. 65 mpg was the result. My guess is if I had the delete working that it would be nearly 70 mpg though.

    Name:  IMG_20190912_071730881.jpg
Views: 87
Size:  92.0 KB


    Custom Mirage products: Cruise control kit, Glove box light, MAF sensor housing, Rear sway bar, Upper grill block

    Current project: DIY Nitrous oxide setup for ~$100

        __________________________________________

        click to view fuel log View my fuel log 2015 Mirage DE 1.2 manual: 46.5 mpg (US) ... 19.7 km/L ... 5.1 L/100 km ... 55.8 mpg (Imp)


Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •