Fuel Economy, Hypermiling, EcoModding News and Forum - EcoModder.com - View Single Post - 66 mpg 2009 Totoya Prius, Champrius 4.0 Under Construction now

Talos Woten · 06-07-2022, 07:41 PM

Howdy all!

I'm the creator and owner of Champrius, the Champion Camping Prius. (pronounced with stress like champion, not like Prius). My last revision of her (3.0) peaked at 66 mpg @ 65 mph unladen and got 61 mpg in real world use.

In March 2022 I had a fender bender that destroyed the boat tail and decided to do a major upgrade. I thought that the ecomodders here might like to follow the engineering odyssey. It will all be posted on Instagram; here is a good place to start:
https://www.instagram.com/p/CeeL6xyFp-k/
However, if you have in depth questions about the build I can answer them here. (I often exceed the Instagram message post length. ;-)

My goal this time around is to top 70 mpg in real world use, which is basically setting the cruise control to 65 mph on the highway and going +5 over the speed limit everywhere else. For those curious, my figures have virtually no hypermiling. The most I do is long slow stops for safety, which as a side effect helps regenerative braking and occasionally helps me avoid stopping. When I was doing active hypermiling, I was able to squeeze a good +10-25% improvement, depending on conditions. But that not only required a lot of attentiveness, it's not how most people actually drive. I'm interested in "fire and forget" improvements that could reach the mainstream.

Champrius has been around for years featured several places, including this forum. This thread has some good images (some of it obsolete stuff I've removed):
https://ecomodder.com/forum/showthre...tml#post616905
while this one has tries to reverse engineer some values:
https://ecomodder.com/forum/showthre...tml#post635155

It's also been featured on Jalopnik:
https://jalopnik.com/check-out-the-a...1832590335/amp
and all over Reddit, including r/WTF and my personal favorite r/Shi ttyCarMods. There have also been some viral TokTiks, etc. (Actually, I laugh my butt off when someone in the comments on Reddit says to sort the group by most popular posts... and 3 of the top 5 end up being about Champrius.)

Last but not least, I've discovered a new ecomod that I'd like to share, which was another reason for finally joining the forum. Here it is:
https://ecomodder.com/forum/showthre...tml#post669246

Enjoy!

06-07-2022, 07:41 PM	#1 (permalink)
Talos Woten Righteous Imaginarian Join Date: Jun 2022 Location: Aliquippa PA Posts: 107 Champrius v3.2 - '09 Toyota Prius 90 day: 58.73 mpg (US) Thanks: 7 Thanked 104 Times in 53 Posts	66 mpg 2009 Totoya Prius, Champrius 4.0 Under Construction now Howdy all! I'm the creator and owner of Champrius, the Champion Camping Prius. (pronounced with stress like champion, not like Prius). My last revision of her (3.0) peaked at 66 mpg @ 65 mph unladen and got 61 mpg in real world use. In March 2022 I had a fender bender that destroyed the boat tail and decided to do a major upgrade. I thought that the ecomodders here might like to follow the engineering odyssey. It will all be posted on Instagram; here is a good place to start: https://www.instagram.com/p/CeeL6xyFp-k/ However, if you have in depth questions about the build I can answer them here. (I often exceed the Instagram message post length. ;-) My goal this time around is to top 70 mpg in real world use, which is basically setting the cruise control to 65 mph on the highway and going +5 over the speed limit everywhere else. For those curious, my figures have virtually no hypermiling. The most I do is long slow stops for safety, which as a side effect helps regenerative braking and occasionally helps me avoid stopping. When I was doing active hypermiling, I was able to squeeze a good +10-25% improvement, depending on conditions. But that not only required a lot of attentiveness, it's not how most people actually drive. I'm interested in "fire and forget" improvements that could reach the mainstream. Champrius has been around for years featured several places, including this forum. This thread has some good images (some of it obsolete stuff I've removed): https://ecomodder.com/forum/showthre...tml#post616905 while this one has tries to reverse engineer some values: https://ecomodder.com/forum/showthre...tml#post635155 It's also been featured on Jalopnik: https://jalopnik.com/check-out-the-a...1832590335/amp and all over Reddit, including r/WTF and my personal favorite r/Shi ttyCarMods. There have also been some viral TokTiks, etc. (Actually, I laugh my butt off when someone in the comments on Reddit says to sort the group by most popular posts... and 3 of the top 5 end up being about Champrius.) Last but not least, I've discovered a new ecomod that I'd like to share, which was another reason for finally joining the forum. Here it is: https://ecomodder.com/forum/showthre...tml#post669246 Enjoy!