So... Mythbusters got a stock Hemi Magnum to get 44.5 MPG

velociT

Top Post Dawg
Joined
May 10, 2006
Location
Not Austin, TX
TDI
06 Jetta TDI *sold*
They got 44.5 MPG without modifying their Dodge Magnum.

They followed a semi at highway speed at a distance of 10 feet.

I can't help but think that means we'd probably be getting 90-100mpg in the same test. :D
 

yatzee

Top Post Dawg
Joined
Jan 4, 2004
Location
Montreal, Qc
TDI
see sig
i'm don't agree with many of their methods for recording fuel economy and 10 feet isn't exactly very much distance.

On the other hand, if I just did 60 mph everywhere like most of the semis, i'd probably see an improvement...
 

TurbinePower

Veteran Member
Joined
Dec 19, 2005
Location
Upstate SC
TDI
None
They are typically going by the computer calculated mileages, and their tests aren't precisely vigorously retested for subsequent results.

Still a cool show, though.
 

bikeprof

Veteran Member
Joined
Sep 2, 2005
Location
Pagosa Springs, Colorado(YEAH!)
TDI
1996 Passat B4 Variant white, 1996 Town & Country 3.8 LXI
FYI..., the tests that MYTHBUSTERS do are very well controlled!

They have a "do not try this at home" type of disconnection from anyone that wants to do it their way...(so they won't be liable).

SO NO, they would not tell the driver of the big truck to stop, would you(unless your 01M was going bad and needed a "new" vehicle)?
 

Thunderstruck

Veteran Member
Joined
Feb 19, 2004
Location
Chicago
TDI
2015 GTI SE 6M
Do you realize the size of the wet spot on their pants if the driver had tapped the brake pedal?
 

UFO

Veteran Member
Joined
Jul 31, 2007
Location
A mile high
TDI
2001 Beetle
If you connected a tow bar and shut the engine off, you'd get better mileage. Safer too.
 

Lug_Nut

TDIClub Enthusiast, Pre-Forum Veteran Member
Joined
Jun 20, 1998
Location
Sterling, Massachusetts. USA
TDI
idi: 1988 Bolens DGT1700H
:rolleyes: And yet no one worries about the trailer crashing into the tractor when the driver brakes?

Put the drafting car right against the ICC bar and there is no closing speed. Tractor, trailer and drafter will all slow at the same rate.
20 feet draft distance will cause more damage to the car than will 10 feet.
 

diesel-dave

Veteran Member
Joined
Aug 26, 2007
Location
earth
TDI
2003 wagon TDI, 2003 wagon Tdi, 2013 Q7 Tdi
Thunderstruck said:
Do you realize the size of the wet spot on their pants if the driver had tapped the brake pedal?


ya, I didnt even do that with my bike. Thats askin for death
 

VeeDubTDI

Wanderluster, Traveler, TDIClub Enthusiast
Joined
Jul 2, 2000
Location
Springfield, VA
TDI
‘18 Tesla Model 3D+, ‘14 Cadillac ELR, ‘13 Fiat 500e
The point here is not whether or not following a semi at 10 feet is safe. I think we all know the answer to that.

The point is that Mythbusters is not known for controlling their fuel economy calculations or letting the experiment go on for enough miles to get a true and accurate fuel economy reading.

I think it's probably safe to say that their actual range could be anywhere from 30 mpg to 50 mpg.

Also, this isn't really new news or a big myth. Everyone knows that following in a vehicles slip stream reduces the work that the engine needs to do to maintain speed. :rolleyes:
 

scmadm

Vendor
Joined
Mar 13, 2009
Location
Niles, Ohio
TDI
1997 Passat TDI sedan
Lug_Nut said:
:rolleyes: And yet no one worries about the trailer crashing into the tractor when the driver brakes?

Put the drafting car right against the ICC bar and there is no closing speed. Tractor, trailer and drafter will all slow at the same rate.
20 feet draft distance will cause more damage to the car than will 10 feet.
If you WERE to do this you should have your cars brakes wired/wireless to the trucks brakes so you would brake when it does (just like the truck's trailer does).
 

MarsBar

Veteran Member
Joined
Apr 28, 2008
Location
San Jose, CA
TDI
B4V#2 "Flash", 2000 Jetta GL, B4V#1 "PaTuDI" (2008-2018 RIP)
Ten feet behind a semi sounds suspiciously like drafting, so I would expect there to be great mpgs. What the best they could get in "real world driving conditions" would be significantly lower.
 

mx07gt

Veteran Member
Joined
Apr 9, 2009
Location
Eagle Pass, TX
TDI
B5 Passat TDI
following a semi 10 feet apart is illegal anyway... I'll stay with my 50+mpg jetta or beetle at a safe distance any day.
 

Lug_Nut

TDIClub Enthusiast, Pre-Forum Veteran Member
Joined
Jun 20, 1998
Location
Sterling, Massachusetts. USA
TDI
idi: 1988 Bolens DGT1700H
Interestingly, pacing alongside the cab of the tractor provides almost as much decrease in fuel use as following behind. Think of the V formation of geese in flight or an eschelon of cyclists. The "wake" from the front of the tractor bows out from the sides enough that there are several feet of relatively dead air alongside at about where the tractor drive wheels are.
You're still in a big blind spot, but you're not tailgating.
 

4Gman

Veteran Member
Joined
Apr 13, 2006
Location
ClaremOnt, CA
TDI
2000 Jetta
VeeDubTDI said:
The point here is not whether or not following a semi at 10 feet is safe. I think we all know the answer to that.
And yet some need a reminder....:rolleyes:

------:eek:---------
 

nicklockard

Torque Dorque
Joined
Aug 15, 2004
Location
Arizona
TDI
SOLD 2010 Touareg Tdi w/factory Tow PCKG
UFO said:
If you connected a tow bar and shut the engine off, you'd get better mileage. Safer too.
My next mod will be a 500 lb-force electromagnet mounted to my front bumper by spectra-reinforced bungee cord and fired by CO2 paint ball gun cartridge. When I want loose I'll just tap on the brakes and it will let loose, then I'll reel it in by hand crank.
I think I can average 750 mpg on highway trips this way.


This post is humor/jesting.
 
Last edited:

Thunderstruck

Veteran Member
Joined
Feb 19, 2004
Location
Chicago
TDI
2015 GTI SE 6M
I've seen good results when I'm behind tanker trucks-for some reason they seem to cut a good hole in the air for me. I'm plenty far back-the key is to open the sunroof, and when the wind noise gets down to almost nothing you are in the zone. And with tankers, the sweet spot is a good safe distance back, not 5 feet like you see some idiots doing.
 

Lug_Nut

TDIClub Enthusiast, Pre-Forum Veteran Member
Joined
Jun 20, 1998
Location
Sterling, Massachusetts. USA
TDI
idi: 1988 Bolens DGT1700H
4Gman said:
And yet some need a reminder
Why don't all semi trucks come with brakes that stop from 65 mph in 10 feet distance? How many G force is that again?
And why tailgate in the breakdown lane at highway speeds?
You might as well have shown a car crushed by a tree for all the relevancy....:rolleyes:
 

ARCJr

Veteran Member
Joined
Mar 14, 2003
Location
East Brunswick, NJ
TDI
2000 Golf TDI "GTD"
Don't think its the breakdown lane, Lug.
Look in front of the trailer's rear wheels, you can see a white painted line. Could be the end of the on-ramp, beginning of an off-ramp, or just some place with very long white lines.

Shame about the car, in any case...
 

VeeDubTDI

Wanderluster, Traveler, TDIClub Enthusiast
Joined
Jul 2, 2000
Location
Springfield, VA
TDI
‘18 Tesla Model 3D+, ‘14 Cadillac ELR, ‘13 Fiat 500e
The Corvette ran into the trailer at an incredible speed (police chase, anyone?) and then the truck pulled off to the side of the road. :rolleyes:

Think outside the box, people. :p But yes, the fact remains that following a semi truck at 10 foot distance is not going to result in what you see in that picture, unless the truck slammed into the side of a building, which there aren't very many of in the middle of the interstate. ;)
 

UFO

Veteran Member
Joined
Jul 31, 2007
Location
A mile high
TDI
2001 Beetle
nicklockard said:
My next mod will be a 500 lb-force electromagnet mounted to my front bumper by spectra-reinforced bungee cord and fired by CO2 paint ball gun cartridge. When I want loose I'll just tap on the brakes and it will let loose, then I'll reel it in by hand crank.
I think I can average 750 mpg on highway trips this way.


This post is humor/jesting.
:D Nice.
 

grizzlydiesel

Veteran Member
Joined
Feb 18, 2009
Location
Virginia, USA
TDI
2000 Jetta 5 speed
the corvette picture is not relivant. you can tell its the shoulder because of the rumble strips. either the vette ate the rear end and the truck pulled off, or vette driver somehow veered off the road and hit the parked truck. either case, that was not a 10 foot crash.

I have drafted in my full size blazer before, you can indeed feel when you enter the zone, and from my recolection it was not very close, certainly not close enough that i was worried that i would hit the truck in an emergency braking situation. of course i also dont talk on a cell phone, drink coffie, text friends, or try to turn my car into a mobile office full of distractions.

that being said, no, i would not follow a semi 10 feet off its bumper. and as to driving along side, thats just annoying to everyone who's trying to pass the semi truck. ive wanted to run people off the road for pacing the semi trucks before.
 

Lug_Nut

TDIClub Enthusiast, Pre-Forum Veteran Member
Joined
Jun 20, 1998
Location
Sterling, Massachusetts. USA
TDI
idi: 1988 Bolens DGT1700H
ARCJr said:
Could be the end of the on-ramp, beginning of an off-ramp, or just some place with very long white lines.
Look closer. What you want to believe is a white paint stripe on the road surface is actually the trim around the rear window of that black car.:rolleyes:
Is it an Olds or a Ford Crown Vic? I can't tell from just the tail lamp.
 

K5ING

Mega-Miler
Joined
Apr 18, 2001
Location
Krum, TX
TDI
Silver 2001 Golf GL TDI 5-speed
Mythbusters isn't that good when trying to dispel myths. Remember when they declared that "any diesel car can burn WVO without any modifications at all"? Yea, right.

I remember the one they did with the tailgate up or down on pickup trucks. To prove/disprove it, they used a couple of modern crew (long)-cab, short-bed trucks. Amazingly, they found that the cab formed a bubble of air in the bed and they got better mileage by leaving the tailgate up. WRONG!

That "myth" was started a long time ago when pickups had short cabs and long beds. I'm also sure that extreme aerodynamic testing wasn't done at tht time. They should have used one truck, say, a '72 Chevy single cab long bed with a Scangage or other instrument to see realtime results with the gate up and down. I'm not so sure that the bubble of air they found would have held together in an 8 ft bed.

Another one they did that bugs me is the "penny dropped from a tall building and injuring someone" myth. That myth was started when pennies were made of copper and 2 to 3 times the weight of todays alloy pennies. But that's a subject for another message board.
 

bikeprof

Veteran Member
Joined
Sep 2, 2005
Location
Pagosa Springs, Colorado(YEAH!)
TDI
1996 Passat B4 Variant white, 1996 Town & Country 3.8 LXI
Lug_Nut said:
Look closer. What you want to believe is a white paint stripe on the road surface is actually the trim around the rear window of that black car.:rolleyes:
Is it an Olds or a Ford Crown Vic? I can't tell from just the tail lamp.
Good observation but I have to disaggree.
There is a white line that goes from the front of the trailer tires to the dolly's of the said trailer, all on the RIGHT side bottom of the trailer that is in the PIC.

I do see your trim piece, it is very clean, nice observation...
 
Top