Go Back   EcoModder Forum > EcoModding > EcoModding Central
Register Now
 Register Now
 

Reply  Post New Thread
 
Submit Tools LinkBack Thread Tools
Old 11-07-2010, 01:28 AM   #1 (permalink)
EcoModding Jack
 
nimblemotors's Avatar
 
Join Date: Nov 2010
Location: Sacramento
Posts: 335
Thanks: 12
Thanked 58 Times in 40 Posts
MG Midget + Geo Metro 3cyl = MGeo

Hello, let me introduce my MPG project, a '71 MG Midget, getting a Geo Metro 3-cyl engine (Suzuki G10).

The MG folks like a restoration, the Suzuki engine guys want more power,
so I've come here to show my project.

I'm trying to achieve a pretty high MPG with this little car.
I stripped out a Metro quite a while back for its trans and suspension for another EV project, and have had this engine collecting dust for a while.
Thought I might just use it for a backup generator, or maybe an air compressor, but I acquired a '71 MG Midget unfinished project at a great price and have decided to put the G10 motor in it, and build it for super high MPG. The Midget is a very small and light car, stock it is only 1500lbs.
The G10 engine is about 100lbs lighter than the iron 4-cyl that was stock.
And its has some pretty heavy sheet metal, so I think I can get its weight down to maybe 1200lbs.

I just got the engine running on a stand, going through all the wiring to strip out just what is needed to run the engine.

I'm trying to figure out how much time I should spend modifying the engine before I put it in the car. Been thinking I should just throw it in and get it running, but I really want to modify the G10 motor to make it lighter and get better MPG.

I want to replace the TBI fuel injection with my own system, convert it to port injection and distributerless ignition (coil on plug). Raise the compression significantly, and use water injection. Then tune it to maximize efficiency at around 2,000 rpm for 65mph cruising.

Make it hybrid -- removing the starter and alternator, and add a more powerful electric motor that will spin it as an assist, with a small
battery pack that can recharged from a socket (Plugin Hybrid).

Any comments or suggestions?

Jack Murray
Nimble Motorsports



Last edited by nimblemotors; 11-09-2010 at 10:59 PM.. Reason: added car picture
  Reply With Quote
Alt Today
Popular topics

Other popular topics in this forum...

   
Old 11-07-2010, 01:41 AM   #2 (permalink)
Dartmouth 2010
 
SVOboy's Avatar
 
Join Date: Nov 2007
Location: Hanover, NH
Posts: 6,427

Vegan Powa! - '91 Honda CRX DX
Team Honda
90 day: 66.52 mpg (US)
Thanks: 92
Thanked 113 Times in 82 Posts
Send a message via AIM to SVOboy Send a message via MSN to SVOboy Send a message via Yahoo to SVOboy
This sounds the the worlds most awesome project, I've always wanted to convert a Midget!!

Honestly I would just chuck the engine in. I don't know how much effort it's worth putting in to modify that engine. I think the time/money would be better spent buying a 1l diesel smart engine or a 660cc japanese kei engine if you want to go nuts with it.
  Reply With Quote
The Following User Says Thank You to SVOboy For This Useful Post:
nimblemotors (11-07-2010)
Old 11-07-2010, 01:05 AM   #3 (permalink)
EcoModding Lurker
 
Join Date: May 2010
Location: Minneapolis, MN
Posts: 34

Red Rabbit - '02 Honda Civic LX
90 day: 38.58 mpg (US)
Thanks: 0
Thanked 1 Time in 1 Post
Sounds cool, I was just on craigslist looking for a spitfire chassis. Awful nice of these folks to build lightweight cars for us to mess with isn't it?
__________________
  Reply With Quote
Old 11-07-2010, 08:22 AM   #4 (permalink)
Coasting Down the Peak
 
skyl4rk's Avatar
 
Join Date: Jun 2008
Location: M I C H I G A N
Posts: 514

Toyauto Pickup - '94 Toyota Pickup 2WD
90 day: 36.32 mpg (US)

Versa Base - '09 Versa Sedan 1.6 Base
Team Nissan
90 day: 41.69 mpg (US)
Thanks: 27
Thanked 41 Times in 34 Posts
My first car that I bought was a 70 Midget. It was a lot of fun but I spent a lot of time and money on it. The first new car that I bought was a Chevy Sprint. Back then, I bought it after riding a motorcycle with no car for two years. I looked at the 3 cyl Suzuki motor and saw a nice big 1000cc motorcycle motor and thought it was awesome. I drove the Sprint as if it were a sports car, and it was a great motor and great handling car. I would buy another today, if it were available.

So I think your matchup is a very good one.

Which transmission will you be using?
__________________
Nissan Versa Aeromods
  Reply With Quote
Old 11-07-2010, 12:40 PM   #5 (permalink)
EcoModding Jack
 
nimblemotors's Avatar
 
Join Date: Nov 2010
Location: Sacramento
Posts: 335
Thanks: 12
Thanked 58 Times in 40 Posts
I've always liked the little sports cars, the TR6 was my favorite, eventually owned one, which I drove across the country. The TR6 is pretty rare today and not cheap when restored. They had a powerful straight 6. The MG midget isn't quite so valuable.

The real joy of the cars is rowing through the gears with the top down, hearing the growl of the engine!
So of course it has a 5-speed. The Suzuki Samurai is a RWD with the 1.3L engine,
and the trans bolts right up with the 1.0L. It fits into the MG, but my plan is to enlarge
the trans tunnel so I can run the exhaust through the trans tunnel to streamline the undercarriage.

For the Geo owners, what muffler should I use? I want it to be very lightweight (like everything going into this car)
I have a glasspac on the test stand, but these are actually pretty heavy mufflers.
Perhaps a motorcyle muffler? Of course, lightweight AND CHEAP, need both features!
  Reply With Quote
Old 11-07-2010, 05:46 PM   #6 (permalink)
...beats walking...
 
Join Date: Jul 2009
Location: .
Posts: 6,191
Thanks: 179
Thanked 1,520 Times in 1,121 Posts
...my first 'new' car was a 1965 MG Midget, the first year with rollup windows.
  Reply With Quote
Old 11-07-2010, 09:34 PM   #7 (permalink)
Batman Junior
 
MetroMPG's Avatar
 
Join Date: Nov 2007
Location: 1000 Islands, Ontario, Canada
Posts: 20,854

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

MPGiata - '90 Mazda Miata
Last 3: 51.27 mpg (US)

Winter beater Metro - '00 Chevrolet Metro
90 day: 61.51 mpg (US)
Thanks: 2,691
Thanked 5,600 Times in 2,875 Posts
This sounds like a great project.

Is it really going to happen? No offense intended, but so many people's eyes are bigger than their stomachs when it comes to ambitious plans like this, if you know what I mean.

Are you documenting the build anywhere (web)?
__________________
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 11-08-2010, 01:33 AM   #8 (permalink)
Wannabe greenie
 
Join Date: Aug 2008
Location: Yorba Linda, CA
Posts: 1,098

The Clunker (retired) - '90 Honda Accord EX sedan
Team Honda
90 day: 29.49 mpg (US)

Mountain Goat - '96 Ford Ranger XLT 4x4 SuperCab
90 day: 18 mpg (US)

Zippy - '10 Kymco Agility 125
90 day: 65.03 mpg (US)
Thanks: 5
Thanked 53 Times in 40 Posts
Quote:
Originally Posted by MetroMPG View Post
Is it really going to happen? No offense intended, but so many people's eyes are bigger than their stomachs when it comes to ambitious plans like this, if you know what I mean.
For this reason I'd recommend stuffing the 1.0L in there and locating a second one to modify. That way, you'll start enjoying the car right away.
__________________

  Reply With Quote
Old 11-08-2010, 01:46 AM   #9 (permalink)
EcoModding Jack
 
nimblemotors's Avatar
 
Join Date: Nov 2010
Location: Sacramento
Posts: 335
Thanks: 12
Thanked 58 Times in 40 Posts
No offense taken! Typing in ideas is about 100000 times easier than getting it done in the real world!

The Midget + G10 motor is definitely building built!

Here is where we removed the stock engine,
http://www.nimblemotorsports.com/mgremove.jpg
and trial fitting the G10 motor:
http://www.nimblemotorsports.com/mgeotryfit.jpg
And here is the engine running on a stand, after I figured out the wiring!
http://www.nimblemotorsports.com/mg10stand.jpg
(IF you look to the very left, you'll see my extra engine)


The current question is whether I just put the stock motor in it now,
or do all the trick work to it for maximum efficiency, and make it a hybrid.

I have another G10 engine that I can do all the tweaks to and put this high mileage one in the car now. But once its running, THEN you ask if I'll ever really get to the tricked-out engine part! That is why I think I should do the engine work now, cause it might not get done later.

I was posting to the team swift site, but was planning to document it here instead. Of course I have my own website, and i'll show it off there once its done.

I was working on the brakes today, the stock master cylinders are toast.
I'm putting in some Wildwood cylinders and will have to tweak the pedal assembly to make them work. Pulled the stock gas tank. I want to replace it with a plastic tank to save 10-15lbs. Spent hours researching alternatives, all the race tanks are not the right size. I'm thinking of using a pair of 2.5 gallon HDPE containers ahead of the rear axles just behind the seats, which is the safest place for the gas tanks (and also move the weight inboard). I'll see if that will work once I get the containers.

This also frees up the under trunk area for some batteries.

Last edited by nimblemotors; 11-08-2010 at 02:22 AM.. Reason: add image links
  Reply With Quote
Old 11-08-2010, 02:01 PM   #10 (permalink)
Master EcoModder
 
Wonderboy's Avatar
 
Join Date: Jun 2008
Location: Chicago
Posts: 673

01 Insight - '01 Honda Insight
90 day: 53.73 mpg (US)
Thanks: 40
Thanked 37 Times in 26 Posts
Quote:
The current question is whether I just put the stock motor in it now,
or do all the trick work to it for maximum efficiency, and make it a hybrid.
Unless you don't have much of a work (something you do to make money) or barter/trade schedule, I'd expect this to take a while. If it were me, I'd fool around with everything you're planning on doing BEFORE you pop the engine in unless there is enough real estate in the engine bay (like the vast plains of engine bay space available in my CRXFi project) for you to have room to fiddle around with the starter motor and the TBI.

I obviously think it's a great idea for a project considering my own project inclinations :P

Depending on how broken in your head gasket is by now, I'd consider trying this out. I did it, but I don't have anything to compare it to. Others have reaped positive results.

I'll be watching this project very closely, especially if you start fooling around with replacing the TBI... definitely on my list.

Some questions: how are you going to deal with the axles? I think the midget might actually have a smaller track width than any metros and may have completely different hub/splines. MGs are RWD too, right? What are your plants to deal with these thhings fitting together?

__________________
  Reply With Quote
Reply  Post New Thread


Thread Tools


Similar Threads
Thread Thread Starter Forum Replies Last Post
Geo Metro 1.0L G10 engine rebuild mods for better MPG Wonderboy EcoModding Central 54 03-05-2015 01:05 PM
geo metro xfi 1994 45mpg to 50 mpg 5 speed for sale la california area must sell!!! geo metro xfi 45 mpg sale For Sale 3 02-24-2014 09:06 PM
CRXFi Build Thread (Geo Metro XFi drivetrain in Honda CRX) Wonderboy EcoModding Central 303 09-19-2011 09:22 AM
Restoring a 1989 Geo Metro IheartGeos Introductions 18 02-22-2010 01:00 AM
My 1989 Geo Metro Story owlafaye Introductions 2 10-05-2008 06:31 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