Go Back   EcoModder Forum > Introductions
Register Now
 Register Now
 

Reply  Post New Thread
 
Submit Tools LinkBack Thread Tools
Old 02-15-2010, 10:52 PM   #1 (permalink)
downhill both ways
 
Toby's Avatar
 
Join Date: Feb 2010
Location: Missouri, United States
Posts: 45

Terceleporter - '96 Toyota Tercel STD
90 day: 52.6 mpg (US)
Thanks: 2
Thanked 1 Time in 1 Post
Slacker buys a Tercel

Hello ecomodders,

I returned to the USA from disaster relief work in Sudan about a year ago in pursuit of my wife.

I finally found a job in my field (engineering), but it involved a 40 mile commute suitable to neither my preference of cycling, nor my trusty Nissan pickup.

In response I recently purchased a 1996 Toyota Tercel DX. It's a sweet ride with 94 hp, 85k miles, a couple dents, and wicked pink "graphix" reading "sport." With mild hypermiling, I ran 38 mpg over my first tank in this car. Basically, I love it.

Since my commute is 95% highway, I'm really interested in aero mods. I'm also very interested in taller gearing for this car. If anyone has gone down that road, I'd love to hear about it.

I have decent mechanical skills. I'm a fair welder and machinist with access to a good shop at work. I love problem solving. The downside is that I can be a real slacker about personal projects.

I have enjoyed many of the ideas and projects I've read about here. Great work, people.

  Reply With Quote
Alt Today
Popular topics

Other popular topics in this forum...

   
Old 02-15-2010, 11:05 PM   #2 (permalink)
Administrator
 
Daox's Avatar
 
Join Date: Dec 2007
Location: Germantown, WI
Posts: 11,020

CM400E - '81 Honda CM400E
90 day: 58.68 mpg (US)

Daox's Grey Prius - '04 Toyota Prius
Team Toyota
90 day: 49.53 mpg (US)

Daox's Insight - '00 Honda Insight
90 day: 64.33 mpg (US)

Swarthy - '14 Mitsubishi Mirage DE
Mitsubishi
90 day: 56.69 mpg (US)
Thanks: 2,339
Thanked 2,417 Times in 1,462 Posts
Welcome to EM Toby.

You and I share very similar cars. My Paseo is built on the same chassis as the Tercel and they also share the same engine. Unfortunately for me, the Paseo has shorter gearing than the Tercel. As it is, if you have the 5 speed transmission, you have the tallest stock transmission possible. The only option for going taller is to check if the 4 speed differential fits in the 5 speed bellhousing. But, even then, it will only drop your rpms roughly 100 @ 55 mph, so not much of a gain there. The other option would be a custom 5th gear. A few guys have tried this on various other cars and have had good success with it. Since you have access to a machine shop, you might have good luck doing a reversed 2nd gear (you'd need a donor transmission) as a new 5th gear. I know I'd love to do that myself.

Other than that, I'd definitely pump the tires up to maximum sidewall and focus on aero mods. An upper grill block would be an excellent start.
__________________
Current project: Adding regenerative braking to the Mirage
  Reply With Quote
The Following User Says Thank You to Daox For This Useful Post:
Toby (02-15-2010)
Old 02-15-2010, 11:25 PM   #3 (permalink)
downhill both ways
 
Toby's Avatar
 
Join Date: Feb 2010
Location: Missouri, United States
Posts: 45

Terceleporter - '96 Toyota Tercel STD
90 day: 52.6 mpg (US)
Thanks: 2
Thanked 1 Time in 1 Post
Thanks for the amazingly quick response. In fact, I have the four speed manual transmission. Oddly, the EPA rating for the model with the 5 speed is slightly worse. I will definitely be looking into the possibility of the 5 speed in my car, though.

I've read several of your posts about your Paseo. I hope I can make half your progress.
  Reply With Quote
Old 02-15-2010, 11:59 PM   #4 (permalink)
Pishtaco
 
SentraSE-R's Avatar
 
Join Date: Jun 2009
Location: Bay Area, California
Posts: 1,485

Mean Green Toaster Machine - '06 Scion xB
Team Toyota
90 day: 48.92 mpg (US)
Thanks: 56
Thanked 284 Times in 181 Posts
Welcome to EM, Toby. Thanks for your humanitarian assistance in Sudan!

How fast do you drive on the highway? You don't need aero mods if you keep your speeds <=55 mph. The 1NZ-FE engine in the Tercel/Echo/Yaris is capable of ~50 mpg at slow cruising speeds.
__________________
Darrell

Boycotting Exxon since 1989, BP since 2010
Have you ever noticed that anybody driving slower than you is an idiot, and anyone going faster than you is a maniac? George Carlin
Mean Green Toaster Machine
49.5 mpg avg over 53,000 miles. 176% of '08 EPA
Best flat drive 94.5 mpg for 10.1 mi
Longest tank 1033 km (642 mi) on 10.56 gal = 60.8 mpg
  Reply With Quote
Old 02-16-2010, 12:21 AM   #5 (permalink)
downhill both ways
 
Toby's Avatar
 
Join Date: Feb 2010
Location: Missouri, United States
Posts: 45

Terceleporter - '96 Toyota Tercel STD
90 day: 52.6 mpg (US)
Thanks: 2
Thanked 1 Time in 1 Post
After only a week in this car, I've settled to cruising around 57 mph. This seems to be a sweet spot that keeps me just above the speed at which you get run over by pickups and H2's on the highway I frequent.

My car has the 5E-FE engine. I know I should be getting better milage than I have, but my numbers are also suspect so far.

I'm running on Missouri winter gas in pretty harsh winter weather. And I'm calculating my fuel consumption by pump top off, which is subjective at best.
  Reply With Quote
Old 02-16-2010, 12:24 AM   #6 (permalink)
downhill both ways
 
Toby's Avatar
 
Join Date: Feb 2010
Location: Missouri, United States
Posts: 45

Terceleporter - '96 Toyota Tercel STD
90 day: 52.6 mpg (US)
Thanks: 2
Thanked 1 Time in 1 Post
This car, by the way, is the second worst winter driving vehicle I have ever experienced. It has the 155 tires, and the handling and breaking are just poor in the extreme on anything but bone dry conditions.
  Reply With Quote
Old 02-16-2010, 08:32 AM   #7 (permalink)
Administrator
 
Daox's Avatar
 
Join Date: Dec 2007
Location: Germantown, WI
Posts: 11,020

CM400E - '81 Honda CM400E
90 day: 58.68 mpg (US)

Daox's Grey Prius - '04 Toyota Prius
Team Toyota
90 day: 49.53 mpg (US)

Daox's Insight - '00 Honda Insight
90 day: 64.33 mpg (US)

Swarthy - '14 Mitsubishi Mirage DE
Mitsubishi
90 day: 56.69 mpg (US)
Thanks: 2,339
Thanked 2,417 Times in 1,462 Posts
Quote:
Originally Posted by SentraSE-R View Post
You don't need aero mods if you keep your speeds <=55 mph.
Sorry, but this is completely untrue. At just over 35 mph, half of the power to move the car is going towards overcoming aerodynamic drag. At 55 mph, 70% of the power required to maintain speed is going to overcome aero drag. Aerodynamics are a huge factor at all but very slow speeds.

Here is the break down using the numbers for a Tercel.




I also calculated the regearing effect of swapping to a 5 speed (from a 95+ Tercel, the earlier ones had shorter gearing). At 55 mph, the 4 speed puts you at roughly 2550 rpm. The 5 speed will drop that down to 2200. Not a huge drop, but its something. If you put your 4 speed differential in your 5 speed, you'd be down to 2080 rpm. FYI, I'm not 100% sure that the differential does actually fit in the 5 speed bellhousing.
Attached Thumbnails
Click image for larger version

Name:	tercelcalc.JPG
Views:	211
Size:	76.9 KB
ID:	5614  
__________________
Current project: Adding regenerative braking to the Mirage
  Reply With Quote
The Following User Says Thank You to Daox For This Useful Post:
MetroMPG (02-16-2010)
Old 02-16-2010, 11:40 AM   #8 (permalink)
Batman Junior
 
MetroMPG's Avatar
 
Join Date: Nov 2007
Location: 1000 Islands, Ontario, Canada
Posts: 21,235

Blackfly - '98 Geo Metro
Team Metro
Last 3: 70.09 mpg (US)

MPGiata - '90 Mazda Miata
90 day: 52.8 mpg (US)

Winter beater Metro - '00 Chevrolet Metro
90 day: 73.57 mpg (US)

Fancy Metro - '14 Mitsubishi Mirage top spec
90 day: 55.99 mpg (US)
Thanks: 2,988
Thanked 5,875 Times in 3,045 Posts
Welcome to the forum, Toby.

The numbers don't lie: if highway driving is your thing, aero modding is your friend.

Looking forward to your projects.

Darin
__________________
Latest mods test: 15 mods = 15% MPG improvement: A-B test, 2007 Honda Civic 1.8L, 5-speed
Ecodriving test:
Manual vs. automatic transmission MPG showdown: Nissan Micra 1.6L



EcoModder
has launched a forum for the efficient new Mitsubishi Mirage
www.MetroMPG.com - fuel efficiency info for Geo Metro owners
www.ForkenSwift.com - electric car conversion on a beer budget
  Reply With Quote
Old 02-16-2010, 12:38 PM   #9 (permalink)
Pishtaco
 
SentraSE-R's Avatar
 
Join Date: Jun 2009
Location: Bay Area, California
Posts: 1,485

Mean Green Toaster Machine - '06 Scion xB
Team Toyota
90 day: 48.92 mpg (US)
Thanks: 56
Thanked 284 Times in 181 Posts
I apologize for the misstatements in my previous post. I engaged my typing fingers before turning on my brain.
__________________
Darrell

Boycotting Exxon since 1989, BP since 2010
Have you ever noticed that anybody driving slower than you is an idiot, and anyone going faster than you is a maniac? George Carlin
Mean Green Toaster Machine
49.5 mpg avg over 53,000 miles. 176% of '08 EPA
Best flat drive 94.5 mpg for 10.1 mi
Longest tank 1033 km (642 mi) on 10.56 gal = 60.8 mpg
  Reply With Quote
Old 02-16-2010, 12:53 PM   #10 (permalink)
Batman Junior
 
MetroMPG's Avatar
 
Join Date: Nov 2007
Location: 1000 Islands, Ontario, Canada
Posts: 21,235

Blackfly - '98 Geo Metro
Team Metro
Last 3: 70.09 mpg (US)

MPGiata - '90 Mazda Miata
90 day: 52.8 mpg (US)

Winter beater Metro - '00 Chevrolet Metro
90 day: 73.57 mpg (US)

Fancy Metro - '14 Mitsubishi Mirage top spec
90 day: 55.99 mpg (US)
Thanks: 2,988
Thanked 5,875 Times in 3,045 Posts
No biggie: it's a common misconception that aero doesn't matter except at high speeds. If fuel economy has the equivalent of urban myths, that would be one of them.

__________________
Latest mods test: 15 mods = 15% MPG improvement: A-B test, 2007 Honda Civic 1.8L, 5-speed
Ecodriving test:
Manual vs. automatic transmission MPG showdown: Nissan Micra 1.6L



EcoModder
has launched a forum for the efficient new Mitsubishi Mirage
www.MetroMPG.com - fuel efficiency info for Geo Metro owners
www.ForkenSwift.com - electric car conversion on a beer budget
  Reply With Quote
Reply  Post New Thread


Thread Tools


Similar Threads
Thread Thread Starter Forum Replies Last Post
Wonderboy's Tercel EV Conversion Wonderboy Fossil Fuel Free 37 04-25-2014 10:33 AM
Cousin scored a stereotypical "old lady's" car - 10 y/o Tercel, 3k miles. MetroMPG The Lounge 11 09-14-2010 11:21 AM
6 stroke Tercel engine with electromagnetic valves Daox EcoModding Central 25 01-26-2010 10:50 AM
1991 Tercel NW OHIO $$2200!!! bbissell05 For Sale 3 09-23-2008 02:40 PM
how much is a 1997 toyota tercel worth! joesgot4 EcoModding Central 4 07-12-2008 12:18 PM



Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2019, vBulletin Solutions Inc.
Content Relevant URLs by vBSEO 3.5.2
All content copyright EcoModder.com