Fuel Economy, Hypermiling, EcoModding News and Forum - EcoModder.com - View Single Post - Pre-heating the Prius Transaxle and Engine for better fuel economy

orange4boy · 01-24-2010, 01:38 AM

It's working very well. Today engine was at 40˚C and the transaxle was at 50˚C when I unplugged. I was able to get into S4 earlier than ever and I got a 5.1 L/100 on both of my commutes.

Previously I got 5.3 on the same route and OAT.

I will do a run without heat again to see comparison tomorrow.

I think with a circulation heater on the motor I can get into S4 at the top of my driveway which means the engine will be off for 1/2 of the commute.

01-24-2010, 01:38 AM	#27 (permalink)
orange4boy Master EcoModder Join Date: Aug 2008 Location: The Wet Coast, Kanuckistan. Posts: 1,275 The Golden Egg - '93 Toyota Previa DX 90 day: 31.91 mpg (US) Chewie - '03 Toyota Prius 90 day: 57 mpg (US) The Spaceship - '00 Honda Insight Thanks: 100 Thanked 306 Times in 178 Posts	It's working very well. Today engine was at 40˚C and the transaxle was at 50˚C when I unplugged. I was able to get into S4 earlier than ever and I got a 5.1 L/100 on both of my commutes. Previously I got 5.3 on the same route and OAT. I will do a run without heat again to see comparison tomorrow. I think with a circulation heater on the motor I can get into S4 at the top of my driveway which means the engine will be off for 1/2 of the commute. __________________ Vortex generators are old tech. My new and improved vortex alternators are unstoppable. "It’s easy to explain how rockets work but explaining the aerodynamics of a wing takes a rocket scientist.