03-08-2017, 08:02 PM
|
#1 (permalink)
|
EcoModding Apprentice
Join Date: Oct 2010
Location: Ivins UT
Posts: 213
Thanks: 2
Thanked 24 Times in 22 Posts
|
Dropping wot by 50% idea
I was trying to see if anyone has done it on here and could find anything, so a new thread!! I was wondering if you could drop the throttle range to about 50% if that would help increase mpg more because it gives you a wider range to better meter how much pedal to use?!? Has anyone done it, and did it work??
|
|
|
Today
|
|
|
Other popular topics in this forum...
|
|
|
03-08-2017, 11:16 PM
|
#2 (permalink)
|
EcoModding Apprentice
Join Date: Jul 2016
Location: The Land Downunder
Posts: 229
CT - '11 Lexus CT200h Luxury
Thanks: 26
Thanked 80 Times in 61 Posts
|
Sounds like what we all do by using a light foot. It also would preclude using larger throttle openings that can reduce pumping losses.
|
|
|
03-08-2017, 11:33 PM
|
#3 (permalink)
|
92 Civic VX since 2002
Join Date: Dec 2016
Location: Bellevue, NE USA
Posts: 215
Thanks: 10
Thanked 28 Times in 25 Posts
|
Also, if you have a Scanguage or MPGuino... and if you have a vacuum gauge...you can effectively determine how much to press the gas pedal, which is very sensitive, but with a tiny bit of practice you can curb fuel consumption quite a bit. Quite simple and very effective.
|
|
|
The Following User Says Thank You to Magician For This Useful Post:
|
|
03-08-2017, 11:35 PM
|
#4 (permalink)
|
Master EcoModder
Join Date: Aug 2012
Location: northwest of normal
Posts: 28,519
Thanks: 8,070
Thanked 8,868 Times in 7,320 Posts
|
If you put a block under the throttle pedal, like parents used to do with their teenage drivers, you might not reach the BCFS sweet spot.
If you move the throttle to a 2ft tall 'emergency brake' handled hand throttle, you could increase the precision.
|
|
|
03-09-2017, 01:19 AM
|
#5 (permalink)
|
EcoModding Apprentice
Join Date: Oct 2010
Location: Ivins UT
Posts: 213
Thanks: 2
Thanked 24 Times in 22 Posts
|
Something I forgot to mention is I'm also looking to do that as a means of controlling the vehicles max power so it's kind of like swapping out a smaller engine but by throttle instead?? For example having a 250hp engine and adjusting the throttle range to only allow say 75hp??
|
|
|
03-09-2017, 01:33 AM
|
#6 (permalink)
|
EcoModding flying lizard
Join Date: May 2012
Location: Georgia
Posts: 743
Thanks: 618
Thanked 263 Times in 175 Posts
|
Quote:
Originally Posted by stovie
Something I forgot to mention is I'm also looking to do that as a means of controlling the vehicles max power so it's kind of like swapping out a smaller engine but by throttle instead?? For example having a 250hp engine and adjusting the throttle range to only allow say 75hp??
|
That's not how it works, you are still stuck with the extra friction of the bigger engine and the increased pumping losses of the engine not having to work hard. Just recently I really started taking advantage of road conditions to allow serious engine on pulse and glide, and it has really helped out mileage.
You can essentially accomplish what you are describing here by using pulse and glide. Accelerate at a good amount of throttle(engine is working efficiently, no matter its size) to above desired speed, pop it into neutral, coast down to below desired speed, and repeat. Obviously you can't do this with people anywhere near behind you, but when you can, it REALLY WORKS!
Automakers attempt to offset the mileage penalties of larger engines by using lean burn, atkinsoning, cylinder deactivation, ect to reduce instant power output, requiring more throttle(less pumping losses) to produce the same amount of power. But again, you still pay for the friction of the larger engine, and these strategies are not always active.
__________________
-Kaze o tatakaimasen-
Best trip in V6: 52.0
Best tank in V6: 46.0
Best tank in Mazda: 49.9
Best tank in CBR: 61.3
Best tank in SV: 83.9
Quote:
Originally Posted by MetroMPG
You can lead a fashion-conscious horse to unusual-looking water...
|
Last edited by Daschicken; 03-09-2017 at 01:39 AM..
|
|
|
The Following 2 Users Say Thank You to Daschicken For This Useful Post:
|
|
03-09-2017, 03:17 AM
|
#7 (permalink)
|
herp derp Apprentice
Join Date: Oct 2008
Location: Lawrence, KS
Posts: 1,049
Thanks: 43
Thanked 331 Times in 233 Posts
|
https://goo.gl/images/fgYQ2M
I'm thinking you want a progressive throttle, I think there are a good number of vehicles that already have them, you're just wanting a more extreme version than anything factory.
|
|
|
03-09-2017, 04:43 AM
|
#8 (permalink)
|
Master EcoWalker
Join Date: Dec 2012
Location: Nieuwegein, the Netherlands
Posts: 3,999
Thanks: 1,714
Thanked 2,247 Times in 1,455 Posts
|
I need full throttle, or close to that, at least about 3 times a week when I need to join a busy road at a T junction.
Sure, I can wait until there's a gap big enough to get into and accelerate moderately without frustrating the drivers on the main road. But that will frustrate the line of drivers behind me on the secondary road.
__________________
2011 Honda Insight + HID, LEDs, tiny PV panel, extra brake pad return springs, neutral wheel alignment, 44/42 PSI (air), PHEV light (inop), tightened wheel nut.
lifetime FE over 0.2 Gmeter or 0.13 Mmile.
For confirmation go to people just like you.
For education go to people unlike yourself.
|
|
|
The Following 2 Users Say Thank You to RedDevil For This Useful Post:
|
|
03-09-2017, 06:30 AM
|
#9 (permalink)
|
Master EcoModder
Join Date: Aug 2012
Location: northwest of normal
Posts: 28,519
Thanks: 8,070
Thanked 8,868 Times in 7,320 Posts
|
Nitrous Oxide?
|
|
|
03-09-2017, 12:44 PM
|
#10 (permalink)
|
Rat Racer
Join Date: May 2011
Location: Route 16
Posts: 4,150
Thanks: 1,784
Thanked 1,922 Times in 1,246 Posts
|
P&G is the best way to reduce overall throttle usage. A little WOT and a lot of idling (or just plain shutting off) averages out to a lot better than maxing yourself to 50%.
Cruising at 60 mph in neutral, once the engine settles down to idle I get ~300 mpg (and ∞ with the key off). That brings average mpg up a lot more than simply limiting the amount of gas I allow myself to give it.
__________________
Quote:
Originally Posted by sheepdog44
Transmission type Efficiency
Manual neutral engine off.100% @∞MPG <----- Fun Fact.
Manual 1:1 gear ratio .......98%
CVT belt ............................88%
Automatic .........................86%
|
|
|
|
|