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

Reply  Post New Thread
 
Submit Tools LinkBack Thread Tools
Old 11-24-2017, 06:00 PM   #91 (permalink)
...beats walking...
 
Join Date: Jul 2009
Location: .
Posts: 6,191
Thanks: 179
Thanked 1,521 Times in 1,122 Posts
Quote:
Originally Posted by MetroMPG View Post
Splitter!



...just kidding.

More to come.
Uh, wouldn't putting a "splitter" on that vehicle be similar to putting "racing stripes" and "tail fin" on a turtle(*)?



(*) No offense intended to turtles.

  Reply With Quote
Alt Today
Popular topics

Other popular topics in this forum...

   
Old 11-24-2017, 08:34 PM   #92 (permalink)
Master EcoModder
 
freebeard's Avatar
 
Join Date: Aug 2012
Location: northwest of normal
Posts: 15,251
Thanks: 3,858
Thanked 5,082 Times in 4,047 Posts
Quote:
(*) No offense intended to turtles.
You missed a rare opportunity to use the

Technically correct is the best kind. Forget teh posers.

Adding a front wall for an air dam will gain almost nothing. Unless it is convex to add a bellmouth to the lower valance. However, add an artfully shaped (per aerohead) shark-fin to each outer end and you can create an air curtain that will throw a flat jet of fast air over the front wheel opening. It would be a convergent duct aimed somewhere between the outer edge of the tread and the sidewall.
__________________
.
Freedom, oh freedom, freedom over me
I hate to tell you, mister, but only dead men are free
Murder Most Foul

_________________
  Reply With Quote
Old 11-26-2017, 05:08 PM   #93 (permalink)
Batman Junior
 
MetroMPG's Avatar
 
Join Date: Nov 2007
Location: 1000 Islands, Ontario, Canada
Posts: 21,391

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: 58.72 mpg (US)
Thanks: 3,166
Thanked 6,019 Times in 3,120 Posts
Nascar!

The "splitter" (*) was actually the structural part behind this cow-catcher/snowplow:





~3.5 inches of clearance. It scrapes once in a while.

It is a more durable version of this project, first tested on the Firefly in 2009:



http://ecomodder.com/forum/showthrea...ly-b-9732.html

* - a small splitter may actually help reduce drag on an air dam like this, in some cases. A CFD analysis of a similar air dam applied to a 1st gen Miata showed a slight improvement (and slightly reduced front lift).
Attached Thumbnails
Click image for larger version

Name:	airdam-side.jpg
Views:	343
Size:	61.3 KB
ID:	23013   Click image for larger version

Name:	airdam-front.jpg
Views:	609
Size:	53.0 KB
ID:	23014  
__________________
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
The Following 3 Users Say Thank You to MetroMPG For This Useful Post:
Daox (11-27-2017), Gasoline Fumes (11-26-2017), Xist (11-26-2017)
Old 11-26-2017, 05:13 PM   #94 (permalink)
Batman Junior
 
MetroMPG's Avatar
 
Join Date: Nov 2007
Location: 1000 Islands, Ontario, Canada
Posts: 21,391

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: 58.72 mpg (US)
Thanks: 3,166
Thanked 6,019 Times in 3,120 Posts
Quote:
Originally Posted by freebeard View Post
an artfully shaped (per aerohead) shark-fin to each outer end and you can create an air curtain that will throw a flat jet of fast air over the front wheel opening. It would be a convergent duct aimed somewhere between the outer edge of the tread and the sidewall.
Air curtain would be fun to make. I'm still adding the crude mods to the car though. Walk before run.

We know ducted air curtains work. They're showing up on more and more conventional vehicles. The trouble with DIYing stuff like that is I bet the improvement is relatively small, which makes it hard (without a wind tunnel) to know if you made things slightly better, worse ... or no change.
__________________
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 11-30-2017, 01:38 PM   #95 (permalink)
Batman Junior
 
MetroMPG's Avatar
 
Join Date: Nov 2007
Location: 1000 Islands, Ontario, Canada
Posts: 21,391

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: 58.72 mpg (US)
Thanks: 3,166
Thanked 6,019 Times in 3,120 Posts
Next mod: XFi camshaft swap



What you see here is the result of an XFi camshaft-ectomy, freshly performed on the Firefly (and also its stock, garden variety camshaft).

It's not too big a job to pull a cam out of these motors, so I'm swapping it over to the Metro.

I'm doing it the "easy" way, having cut the tops of the timing belt covers of both cars with a dremel to expose just the cam gear. Otherwise, to get the belt cover off, you have to remove the crankshaft AND waterpump pulleys.

The "easy" way leaves the timing belt in place, while you delicately slip the belt off the cam gear once the cam is loose.

The risk of doing it this way is: what happens if the timing belt slips/jumps on the crank gear while the cam is out of the engine or while you're messing around trying to get the belt on/off? It turns into a bigger job, that's what happens.
Attached Thumbnails
Click image for larger version

Name:	IMG1126.jpg
Views:	701
Size:	78.6 KB
ID:	23076  
__________________
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
The Following User Says Thank You to MetroMPG For This Useful Post:
Daox (11-30-2017)
Old 11-30-2017, 01:39 PM   #96 (permalink)
Batman Junior
 
MetroMPG's Avatar
 
Join Date: Nov 2007
Location: 1000 Islands, Ontario, Canada
Posts: 21,391

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: 58.72 mpg (US)
Thanks: 3,166
Thanked 6,019 Times in 3,120 Posts
Amazing: I just looked up the thread where I first swapped this very XFi cam into the Firefly, which was posted to this very Internet Forum, 10 years and 2 days ago:

http://ecomodder.com/forum/showthrea...2.html#post968

__________________
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
The Following User Says Thank You to MetroMPG For This Useful Post:
Xist (11-30-2017)
Old 12-01-2017, 07:48 PM   #97 (permalink)
Batman Junior
 
MetroMPG's Avatar
 
Join Date: Nov 2007
Location: 1000 Islands, Ontario, Canada
Posts: 21,391

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: 58.72 mpg (US)
Thanks: 3,166
Thanked 6,019 Times in 3,120 Posts
XFI-ified!



It's in, buttoned up & runs great!

I love the character the XFi cam gives the engine. 5th gear is usable for cruising at around-town speeds now, where the engine wouldn't have been happy doing it before.

One thing I didin't recall from the first time I did this swap:

The engine did NOT want to start afterward. The first 3 times I turned the key, it spun really fast, almost as though there was no compression.

The 4th time it caught, but ran really rough -- was sure I must have jumped a cog on the crank gear when I was messing with the timing belt.

The 5th time, it ran less rough, then smoothed out after about 30 seconds.

I wonder if the lifters were messed up from being depressurized?

Maybe the fast spinning at first wasn't a lack of compression (obviously), but with if no valves were opening at first, the cylinders were just being air springs?
Attached Thumbnails
Click image for larger version

Name:	IMG1124.jpg
Views:	253
Size:	63.8 KB
ID:	23079  
__________________
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
The Following User Says Thank You to MetroMPG For This Useful Post:
Daox (12-04-2017)
Old 12-03-2017, 10:03 AM   #98 (permalink)
Master procastinator
 
Join Date: Apr 2017
Location: Panelia, Finland
Posts: 229

Avenger - '98 Toyota Avensis T22 stw 4A-FE
90 day: 35.19 mpg (US)

Sportig - '15 Kia Sportage 2.0crdi 4x4
Thanks: 78
Thanked 41 Times in 36 Posts
About the timing belt cover...are you going to leave it open like that?

Would be convenient to put some sort of quick-open system for example checking the timing belt with little work.
  Reply With Quote
Old 12-03-2017, 10:10 AM   #99 (permalink)
Batman Junior
 
MetroMPG's Avatar
 
Join Date: Nov 2007
Location: 1000 Islands, Ontario, Canada
Posts: 21,391

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: 58.72 mpg (US)
Thanks: 3,166
Thanked 6,019 Times in 3,120 Posts
I reinstalled the top portion of the cover.

But it's only held on by two 10mm bolts, so it's easy to remove to inspect the belt and/or swap camshafts again.
__________________
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 12-03-2017, 01:39 PM   #100 (permalink)
Master EcoModder
 
Stubby79's Avatar
 
Join Date: Sep 2012
Location: Victoria, BC
Posts: 1,296

Firefly EV - '98 Pontiac Firefly EV
90 day: 107.65 mpg (US)

Little Boy Blue - '05 Toyota Echo
90 day: 33.35 mpg (US)

BlueZ - '19 Nissan 370Z Sport
90 day: 17.19 mpg (US)
Thanks: 43
Thanked 382 Times in 287 Posts
Quote:
Originally Posted by MetroMPG View Post


It's in, buttoned up & runs great!

I love the character the XFi cam gives the engine. 5th gear is usable for cruising at around-town speeds now, where the engine wouldn't have been happy doing it before.

One thing I didin't recall from the first time I did this swap:

The engine did NOT want to start afterward. The first 3 times I turned the key, it spun really fast, almost as though there was no compression.

The 4th time it caught, but ran really rough -- was sure I must have jumped a cog on the crank gear when I was messing with the timing belt.

The 5th time, it ran less rough, then smoothed out after about 30 seconds.

I wonder if the lifters were messed up from being depressurized?

Maybe the fast spinning at first wasn't a lack of compression (obviously), but with if no valves were opening at first, the cylinders were just being air springs?
I did the same thing. Drove me nuts, thinking I screwed the whole thing up!

I posted on GMF...immediate answer was that my lifters had extended up without the camshaft to hold them down, and basically over-filled themselves hydraulically. Just had to wait for them to bleed back down to normal.

Oops! Should have thought of that!

  Reply With Quote
Reply  Post New Thread


Thread Tools




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