Fuel Economy, Hypermiling, EcoModding News and Forum - EcoModder.com - View Single Post - Had flexfuel engines not been somewhat mediocre, would ethanol be more widely accepted?

Daox · 10-16-2018, 09:00 AM

I believe in order to run an efficient ethanol engine compared to gas, you really have to bump up the compression ratio into diesel territory. I think I've heard 14-17:1. Adjusting ignition timing and cam timing will only do so much. So, you can probably do this with a turbo or something that actually does alter the compression ratio like Nissan's VC-T technology.

10-16-2018, 09:00 AM	#5 (permalink)
Daox Administrator Join Date: Dec 2007 Location: Germantown, WI Posts: 11,203 CM400E - '81 Honda CM400E 90 day: 51.49 mpg (US) Daox's Grey Prius - '04 Toyota Prius Team Toyota 90 day: 49.53 mpg (US) Daox's Insight - '00 Honda Insight 90 day: 64.33 mpg (US) Swarthy - '14 Mitsubishi Mirage DE Mitsubishi 90 day: 56.69 mpg (US) Daox's Volt - '13 Chevrolet Volt Thanks: 2,501 Thanked 2,585 Times in 1,553 Posts	I believe in order to run an efficient ethanol engine compared to gas, you really have to bump up the compression ratio into diesel territory. I think I've heard 14-17:1. Adjusting ignition timing and cam timing will only do so much. So, you can probably do this with a turbo or something that actually does alter the compression ratio like Nissan's VC-T technology. __________________ Current project: A better alternator delete