Go Back   EcoModder Forum > EcoModding > General Efficiency Discussion
Register Now
 Register Now
 

Reply  Post New Thread
 
Submit Tools LinkBack Thread Tools
Old 06-24-2010, 05:39 PM   #31 (permalink)
Basjoos Wannabe
 
ShadeTreeMech's Avatar
 
Join Date: Apr 2009
Location: Arkansas
Posts: 870

The Van - '97 Mercury Villager gs
90 day: 19.8 mpg (US)

Lyle the Kindly Viking - '99 Volvo V70
90 day: 25.82 mpg (US)
Thanks: 174
Thanked 49 Times in 32 Posts
Quote:
Originally Posted by MetroMPG View Post
I like that the Diahatsu Cuore is 2nd on your list - and the first 4 passenger vehicle, yet not much heavier than the Smart.



Cars like this one horrify me. There is no crush zone in case of a rear end collision, except the heads and bodies of whoever may be in the back, which would have to be children. Put an adult in the back and the back glass acts as a headrest.

If I had a car like this, the back seats would come out and be disposed of. My minvan has a sturdier frame and more room in the back than these things, and even it scares me a bit.

__________________
RIP Maxima 1997-2012


Quote:
Originally Posted by jamesqf View Post
I think you missed the point I was trying to make, which is that it's not rational to do either speed or fuel economy mods for economic reasons. You do it as a form of recreation, for the fun and for the challenge.
  Reply With Quote
Alt Today
Popular topics

Other popular topics in this forum...

   
Old 06-24-2010, 05:40 PM   #32 (permalink)
...beats walking...
 
Join Date: Jul 2009
Location: .
Posts: 6,191
Thanks: 179
Thanked 1,521 Times in 1,122 Posts
...car = (TANK + tin can)/2



...mathematically, speaking...approximately.
  Reply With Quote
Old 06-24-2010, 08:29 PM   #33 (permalink)
(:
 
Frank Lee's Avatar
 
Join Date: Jan 2008
Location: up north
Posts: 12,708

Blue - '93 Ford Tempo
Last 3: 27.29 mpg (US)

F150 - '94 Ford F150 XLT 4x4
90 day: 18.5 mpg (US)

Sport Coupe - '92 Ford Tempo GL
Last 3: 69.62 mpg (US)

ShWing! - '82 honda gold wing Interstate
90 day: 33.65 mpg (US)

Moon Unit - '98 Mercury Sable LX Wagon
90 day: 21.24 mpg (US)
Thanks: 1,568
Thanked 3,483 Times in 2,182 Posts
Quote:
Originally Posted by ShadeTreeMech View Post
I love the Tempo myself, but mine was lucky to get over 30 mpg (3 speed auto; I ran 60 @3000 rpms)

The OHV may be more compact, but more simple it isn't. The pushrods only add to the weight and complexity while reducing its power and maximum rpms.

I would say though the weight of the block isn't the problem with a pushrod engine (and timing chains are a PAIN to get to compared to a belt, although the change intervals are longer) but rather the design. Having the cams lifting the tappets directly is much simpler than the cam pushing the lifter which pushes the pushrod which lifts the tappet.

AFAIK, the aluminum block/cast iron sleeve method is straight forward and reliable. My Max has an aluminum block and DOHC run by 4 timing chains, yet there is no recommended interval on changing the chains and this engine is known to last over 500k miles without problems.

When the Explorer did away with the pushrod and went with an OHV, the mileage went up. I know of a guy managing to eek out 30 mpg from a 2wd Explorer with the OHV engine. With a lot of hypermiling and even shutting off half the cylinders on my pushrod Explorer, I managed to get 19 once.
Tempos need to be 4 or 5 speed to get good fe.

Pushrods don't add much weight and as far as higher rpms... who cares?

I have 5 Tempos- two are 26 years old, one with nearly 300,000 miles- and I've never touched a timing chain on any.

Explorer... pushrod IS OHV.

You shut off half the cylinders and that improved fe?
__________________


  Reply With Quote
Old 06-24-2010, 09:27 PM   #34 (permalink)
Master EcoModder
 
Join Date: Sep 2009
Posts: 5,927
Thanks: 877
Thanked 2,018 Times in 1,302 Posts
One neat little pushrod engine was the Toyota Corolla 1.5 liter of the mid 70s.

The RWD SR5s were little screamers.

Like a Mini Hemi.

regards
Mech
  Reply With Quote
Old 06-24-2010, 09:51 PM   #35 (permalink)
home of the odd vehicles
 
rmay635703's Avatar
 
Join Date: Jun 2008
Location: Somewhere in WI
Posts: 3,186

Silver - '10 Chevy Cobalt XFE
Thanks: 318
Thanked 614 Times in 453 Posts
Don't forget the Subaru 360 sedan at 920lbs or so. The older you go the lighter you will find, old bugs were light also. Especially the reallly old bugs, little tinker toys compared to a Super Beetle.
  Reply With Quote
Old 06-24-2010, 10:11 PM   #36 (permalink)
Left Lane Ecodriver
 
RobertSmalls's Avatar
 
Join Date: Aug 2008
Location: Buffalo, NY, USA
Posts: 2,258

Prius C - '12 Toyota Prius C
Thanks: 79
Thanked 283 Times in 196 Posts
Quote:
Originally Posted by ShadeTreeMech View Post


Cars like this one horrify me. There is no crush zone in case of a rear end collision, except the heads and bodies of whoever may be in the back, which would have to be children. Put an adult in the back and the back glass acts as a headrest.

If I had a car like this, the back seats would come out and be disposed of. My minvan has a sturdier frame and more room in the back than these things, and even it scares me a bit.
I've read about rear head airbags on one of these cars... I think it was the Toyota iQ. You have a few inches of airbag between you and the glass. The other guy's bumper is supposed to connect with something solid in your car, and you'll go 0-20 in zero seconds, which will hurt, but it's not going to crumple like a tin can and kill everyone. At least not in a 20mph collision. Also, the bumper is probably six inches behind the rear glass, which doesn't count for as much in America as it does in Europe and Japan.

Your minivan is not inherently safer, because your van weighs twice as much. Your frame needs to be twice as stiff to endure the same acceleration without buckling.

All that said, I like to have a foot or two of crumple zones behind my rearmost passengers, which would make a rear end collision less jarring for everyone. I also like to have as much crumple zone up front as possible. There are small cars, including the Smart, that do amazingly well in crash tests considering their size, but that's qualified praise.
  Reply With Quote
Old 06-24-2010, 10:20 PM   #37 (permalink)
Master EcoModder
 
Patrick's Avatar
 
Join Date: Apr 2008
Location: Northern Florida, USA
Posts: 510

Hot Tamale - '10 Toyota Prius III
Thanks: 27
Thanked 96 Times in 70 Posts
Have you seen this video? It's a good illustration of the effects of mass (or lack thereof).

  Reply With Quote
Old 06-24-2010, 10:26 PM   #38 (permalink)
...beats walking...
 
Join Date: Jul 2009
Location: .
Posts: 6,191
Thanks: 179
Thanked 1,521 Times in 1,122 Posts
...it also says alot about LONG hoods!
  Reply With Quote
Old 06-24-2010, 10:26 PM   #39 (permalink)
Master EcoModder
 
Patrick's Avatar
 
Join Date: Apr 2008
Location: Northern Florida, USA
Posts: 510

Hot Tamale - '10 Toyota Prius III
Thanks: 27
Thanked 96 Times in 70 Posts
Quote:
Originally Posted by MetroMPG View Post
Let's hear it for deathtraps! ;-) (Thought I'd pre-empt that one.)
OK. Hooray!

  Reply With Quote
Old 06-25-2010, 12:21 AM   #40 (permalink)
(:
 
Frank Lee's Avatar
 
Join Date: Jan 2008
Location: up north
Posts: 12,708

Blue - '93 Ford Tempo
Last 3: 27.29 mpg (US)

F150 - '94 Ford F150 XLT 4x4
90 day: 18.5 mpg (US)

Sport Coupe - '92 Ford Tempo GL
Last 3: 69.62 mpg (US)

ShWing! - '82 honda gold wing Interstate
90 day: 33.65 mpg (US)

Moon Unit - '98 Mercury Sable LX Wagon
90 day: 21.24 mpg (US)
Thanks: 1,568
Thanked 3,483 Times in 2,182 Posts
While you guys are busy crashing into stuff, I'll see and avoid.

__________________


  Reply With Quote
Reply  Post New Thread


Thread Tools


Similar Threads
Thread Thread Starter Forum Replies Last Post
Electric Cars Push Japan Engine Parts Makers to Crisis Mode tjts1 The Lounge 14 12-23-2012 12:47 PM
Fiatís Small Cars to Take Over America, Too? SVOboy EcoModder Blog Discussion 0 01-28-2009 06:01 AM
Article: the 10 cheapest cars in the world MetroMPG General Efficiency Discussion 0 03-06-2008 10:22 AM



Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2020, vBulletin Solutions Inc.
Content Relevant URLs by vBSEO 3.5.2
All content copyright EcoModder.com