60 MPG Hummer? - Page 3 - Fuelly Forums

Click here to see important news regarding the aCar App

Thread Tools Display Modes
Old 11-13-2007, 03:47 PM   #21
Registered Member
theclencher's Avatar
Join Date: Aug 2006
Posts: 542
Country: United States


could have inspired gm to do the volt?

"...you could VERY easily have..." if it's so easy ya better show us how

Old EPA 23/33/27
New EPA 21/30/24

New EPA12/14/17

theclencher is offline   Reply With Quote
Old 11-13-2007, 04:24 PM   #22
Registered Member
basjoos's Avatar
Join Date: Mar 2006
Posts: 392
Country: United States
One problem with turbines is that they have a narrow load range for efficient operation and are highly inefficient when idling. They are great on aircraft or ships where they can run most of the time at 95% full load, but more difficult to adapt to a car where much of the time is spent at much lower loads. You would have to add battery and/or ultracapacitor storage so the turbine could run at its otimum loading to recharge the batteries, then shut down until the batts need recharging. And since turbines are slow to start and to shutdown, the batts would have to have enough capacity so that the turbine wouldn't have to cycle on very often.

basjoos is offline   Reply With Quote
Old 11-13-2007, 04:47 PM   #23
Senior Member
Join Date: Jul 2010
Posts: 278
Country: United States
Location: CT
And all of those are very small hurdles to work over. It shouldn't be too difficult to manage... And the results would be reliable and efficient...
Wyldesoul is offline   Reply With Quote
Old 11-13-2007, 05:22 PM   #24
Registered Member
1993CivicVX's Avatar
Join Date: Aug 2007
Posts: 1,066
Country: United States
Send a message via AIM to 1993CivicVX
Originally Posted by Matt Timion View Post
I know that there are some great ideas on GasSavers, and that often times we think of things that the engineers overlooked, or just didn't want to spend the money on.

I am a bit weary, however, when a mechanic is able to outsmart GM engineers with 100 year old technology.

that's right... the type of hybrid he is building is reminiscent of the diesel/electric cars from the early 1900s.
Not much of a conspiracy theorist, eh?
three stripes the charm!

Car mods are overrated. Just gotta adjust that nut behind the wheel for best mpg.

Forget about World Peace...Visualize using your turn signal.
1993CivicVX is offline   Reply With Quote
Old 11-13-2007, 11:35 PM   #25
Registered Member
skewbe's Avatar
Join Date: Jan 2007
Posts: 771
Country: United States
biff, the "run a turbine at a constant speed and drive a generator" concept is many decades old. Jet planes have a small turbine in the tail that is easier to start than the big turbines, it is then used for air conditioning on the ground and supplying enough power to start the larger engines. It's called an APU, or an Auxillary Power Unit. They are not magically efficient, and a hybrid would still have to run a generator and an electric motor for all its locomotive power. And gas turbines are not that much more efficient than diesels in practice anyway.

I think weary is the right word. It is retarded to go to all that expense to try and save gas then put it in a hummer anyway. Get a dirt bike if you want fuel efficient fun off the road. Small vehicle and thrifty engine, that is a formula for MPG success.

Standard Disclaimer
skewbe is offline   Reply With Quote
Old 11-14-2007, 01:42 AM   #26
Registered Member
Join Date: Oct 2007
Posts: 298
Country: United States
Originally Posted by Biffmeistro View Post
The idea is genius, though... The turbine is one of the more efficient engines out there, if I'm not mistaken.
The only difficulty that exists with it is lag between applying throttle and acceleration, and more importantly, cessation of throttle and cessation of acceleration. That's the big thing that killed it's use with cars. It was tried back in the 60's.

But if you were to have the turbine completely detached from the wheels, and only powering a generator, and were to have electric motors powering the wheels.. That's an incredible combination! The efficiency and power of the turbine motor, but no worries about lag, and you could expand it even more by completely eliminating the drivetrain. Instead of a single large electric motor attached to all four wheels, have four small electric motors attached each to one wheel. Regenerative braking would be very easy, and without having a driveshaft, transmission or even transaxle, the underbody would be incredibly smooth...

If you were to design a car around that turbine/electric setup, you could VERY easily have both worlds of incredible speed and incredible FE. Or if you were to even to design it and have it not be powerful, you could have downright stupid high FE.
Turbines can indeed be very efficient. BUT, the whole notion of turbines as high-efficiency engines is a rather new one. This guy is using a 22 year old turbine in that Hummer. SO efficiency will probably be significantly less than newer designs. Also, as I said in my previous post, the turbine is likely to use a centrifugal compressor and turbine. This is VERY typical of smaller turbines, as they are cheaper to manufacture. BUT, centrifugal turbines are not very efficient - both because of the efficiency of the turbine/compressor themselves AND because they tend to have a low pressure ratio (posibly 15:1 or less). Efficient gas turbines all have two things in common: axial flow design and high pressure ratio (30:1 to 40:1).
StorminMatt is offline   Reply With Quote
Old 11-14-2007, 02:57 AM   #27
Registered Member
DarbyWalters's Avatar
Join Date: Oct 2007
Posts: 376
Country: United States
My dad flew jets in the Air Force and I remember him being interested in the Chrysler Turbine car so I did a search:



Also a turbine car was at Indy until they outlawed it because of its advantages over the rest of the field.

The biggest advantage with a turbine is you could run just about any type of fuel without any changes...now that is cool.
2006 Jeep Liberty CRD...Founder of L.O.S.T.
OME 2.25" Lift w/ Toyo Open Country HTs 235/75/16s
ASFIR Alum Eng/Tranny/Transfercase/Fuel Skids
2002 Air Box Mod...Air Tabs (5) on Roof...(3)each behind rear windows
Partial Grill Block with Custom Air Scoop and 3" Open Catback Exhaust
Lambretta UNO150cc 4 Stroke Scooter

DarbyWalters is offline   Reply With Quote
Old 11-14-2007, 04:18 AM   #28
Registered Member
zpiloto's Avatar
Join Date: Mar 2006
Posts: 1,225
Country: United States
This one probably won't pass emission standards today.
zpiloto is offline   Reply With Quote
Old 11-14-2007, 08:35 PM   #29
VX trainee
Join Date: Oct 2007
Posts: 125
Country: United States
Originally Posted by bzipitidoo View Post
This is a magazine article about a guy who is taking a Hummer and replacing the conventional powertrain with a turbine and electric motor hybrid combo. Supposedly the Hummer will get 60 MPG and do 0 to 60 in 5 seconds. Is this for real? I suspect the magazine "sexed it up" a tiny little bit.

This is really weird.....one of our Wichita news stations just ran a spread on Johnathan this morning...I've known him for 6-7 years. Had heard he was doing Hummer mods, DIDN'T know he was into FE mods.

He can definately think outside the box....maybe he can get an "air car" design going on this side of the pond.
4bfox is offline   Reply With Quote
Old 11-14-2007, 08:38 PM   #30
VX trainee
Join Date: Oct 2007
Posts: 125
Country: United States
Oh, and BTW...they had a shot of Neil Young's 1960 Lincoln sitting in Johnathan's shop. Supposed to be converting it to electric/hybrid or something.

4bfox is offline   Reply With Quote

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

Similar Threads
Thread Thread Starter Forum Replies Last Post
Not very precise mpg calculation larjerr Fuelly Web Support and Community News 4 08-20-2012 01:03 AM
New Feature: Loan and lease cost labrie Fuelly Web Support and Community News 1 02-08-2012 01:12 AM
Is the MPG average 'weighted'? NightFury Fuelly Web Support and Community News 6 05-25-2011 03:38 AM
Keeping my distance in traffic khurt General Fuel Topics 8 09-07-2008 03:23 AM
"active" aero grille slats on 06 civic concept MetroMPG General Fuel Topics 21 01-03-2006 12:02 PM

» Fuelly iOS Apps
No Threads to Display.
Powered by vBadvanced CMPS v3.2.3

All times are GMT -8. The time now is 02:57 PM.

Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2019, vBulletin Solutions, Inc.