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Old 02-18-2021, 11:32 AM   #61 (permalink)
hayden55
Master EcoModder
 
Join Date: Dec 2010
Location: USA
Posts: 1,171

Sport Utility Prius - '10 Toyota Prius II
90 day: 52.98 mpg (US)

300k Sequoia 4WD - '01 Toyota Sequoia Limited 4wd
90 day: 20.19 mpg (US)
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Quote:
Originally Posted by EcoCivic View Post
That's pretty low, the Honda Stream trans I have now has me running at 3K RPM at 70 mph. I thought I wouldn't like this transmission's 4th gear compared to my stock 4 speed, but it's actually alright. The higher cruising RPM doesn't seem to have cost me any MPG, probably because I live in a somewhat hilly area and it climbs hills much more effortlessly at a little higher RPM. It also pulls noticeably better in the lower gears since gears 1-3 are shorter as well.

With the 5 speed I am planning on getting, 5th gear is a bit taller than my 4th gear. 3K RPM will be at 74 MPH. However, I don't think I will feel much of a decrease in climbing performance from cruising at 2800 vs 3K since the manual trans is significantly lighter and is more efficient since it has less moving parts and no internal oil pump.
Shouldn't matter if you just shift down to get up the occasional hill. Dropping the RPMs on cruising is where the big BSFC gain comes from. 3k rpm to 2k rpm is about 10 mpg on the D16.

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The Following 2 Users Say Thank You to hayden55 For This Useful Post:
Ecky (02-18-2021), EcoCivic (02-18-2021)