Location: Round Rock, Texas
Best RPM range for Fuel Economy?
- Thread starter Bredto
- Start date
Lightflyer1
Top Post Dawg
I never said to baby it. But the phrases above sound like they promote abuse of the car in my opinion. By reading Drivbiwire's "rules" he promotes using the rpm band but says nothing about driving it like a thief getting away from the cops. Proper care and operation of the car can be done without the methods the phrases above suggest. You can do what you want though.
Lightflyer1
Top Post Dawg
So what is your point? Do you plan on stalking me or something? It is already listed in my profile for anyone to see. Don't know why you found it necessary to post it again.
What it means is that you're in a much warmer part of the country that probably only saw 20 degrees a few days, whereas up here we usually see -20 for a few days, and 20 degrees is pretty warm when you come outta those months.
When it is -20 my car takes 8-10 miles to warm up to operating temperature the EGR is open quite a lot, and the intake is ice cold the whole time, meaning lots of **** condenses on it. At 30 degrees, mine's warm in a mile and a half.
MAXRPM
Veteran Member
So in general, shifting between 1700 to 1800 RPM, and hypermiling is called driving it normally for you? for me is babying the car! shifting a low rpm, and doing all the above for me is pampering a car ,,, my post said if you plan to do so, drive it like you stole it once a week to take all the soot out and it's healthy for the turbo and engine overall (Never said drive it daily doing Italian tune up or constantly like you stole it,,, you would have to be a little bit mechanical inclined to understand how a TDI would need to be operated,, no pun intended,,
Lightflyer1
Top Post Dawg
Don't put words in my mouth. Drive your car anyway you want. Insulting comments don't belong here. Continue the discussion on your own. No pun intended.
Lincoln
Veteran Member
I'm not a mechanic. That said, my car seems to "like" driving around ~1400-1600rpm for flat cruising. I accelerate closer to ~2000, depending on how fast I'm ramping up. For hills, it also seems to "like" higher rpms--more like 1600-2200 depending on the incline. I'm basing what my car "likes" entirely on feel and sound. That may not be very scientific, but I've always been good with machines and they've been good to me in return--it's a sort of intuition. Regarding the "Italian Tune-ups," etc., I've tried and never seem to get the cloud of smoke some claim I should see coming out the back, plus it just doesn't "feel" good for the car. I suspect that my car doesn't need to be driven that way to stay clean. I'm not afraid of applying heavy throttle, and get above 3000rpms a couple of times per day (e.g. freeway entrances). My gut tells me that anyone who drives these newer cars sensibly (avoid lugging; also steer clear of red-line; cruise somewhere between 1400-2100 rmp) will be just fine. Mileage will improve slightly if driving at low rpm so long as not lugging. Mileage is still good at higher RPM. As someone else on here likes to say, "Drive more. Worry less."
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Lincoln
Veteran Member
Also, see post #35 for some good stuff if you're just skipping to the end. This supports the idea that you're better off using max HP (~1800-2000RPM) while operating under load, and lowest RPM (no lugging!) while cruising.
Perfectreign
Veteran Member
Wow!
I have just adjusted to driving in 4th at 50. I would love 44 MPG.
However, I spend a lot of time at lights looking at my speedometer reading zero.
Perfectreign
Veteran Member
914fan
Veteran Member
My ahu has a fairly mechanical fuel injection system. It does it's best mpg shifting around or before 2k.
From 55&70mph gets me 53&46 mpg respectively.
for me It boils down to my right foot.
From 55&70mph gets me 53&46 mpg respectively.
for me It boils down to my right foot.
turbobrick240
Top Post Dawg
- Joined
- Nov 18, 2014
- Location
- maine
- TDI
- 2011 vw golf tdi(gone to greener pastures), 2001 ford f250 powerstroke
Back from the vault.... The peak efficiency for an alh (197 g/kw-h)occurs at 1750 rpm and 50 hp output. At twenty horsepower it is most efficient at 1250 rpm. My cjaa has a peak efficiency (196 g/kw-h) at 85-90hp and 2250 rpm. At 20 hp it is most efficient at 1250 rpm. I rarely use rpms below 1500 when my foot is on the throttle. Driving close to peak torque , 1800-2200 rpm, gives great efficiency without feeling like punishment.
eddieleephd
Top Post Dawg
Bringing a thread back from the dead! As I started reading, I was thinking about the fact of resistance and that driving faster lowers fuel economy no matter how efficient the engine operates.
I find that driving 65-70 rather than 75-80 gives 5mph increase.
Haven't done much slower long distance driving to tell if 55-60 is the same.
Efficiency vs increased resistance due to air.
It's kinda a loaded question.
yup, most efficient RPM for any given output is generally the lowest RPM that will maintain a clean air fuel ratio without boost
you can run into an island of increased efficiency while in boost, where the IMP is higher than EMP, but it is such a small and transient island in most setups that it is not worth losing sleep over
There's a fairly well founded supposition floating around that in most stock applications with simple single loop EGR they sized the turbine such as to avoid this in normal operation, as the EGR would be flowing backwards.
2015vwgolfdiesel
Top Post Dawg
Having a lot of neighborhood (25 MPH) in my normal diving needs, There is no way to avoid some low RPM (lugging) if you only use the Ordinary DSG (drive) position. Which I do.
One of my pleasures in my Golf is keeping track of the shifting RPMs as I accelerate from 0 to 25 (or 30)
However I do (from time to time) stomp it a little.