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

Reply  Post New Thread
 
Submit Tools LinkBack Thread Tools
Old 01-09-2010, 11:15 AM   #1 (permalink)
EcoModding Apprentice
 
Join Date: Dec 2009
Location: Wisconsin
Posts: 233

Black Beauty - '13 Hyundai Elantra
Thanks: 71
Thanked 2 Times in 2 Posts
Scanguage vs MPGuino - 96 Prizm

Hey guys,

I'm interested in monitoring my instantaneous mpg, (largely because I want to run some controlled tests to determine the most efficient acceleration method).

MPGuino vs Scangauge

As I understand it the Scanguage is:
More expensive
Needs OBDII
Less Accurate

But the MPGuino is:
Harder to install
Not easily removable
Displays only one readout at a time


As such, I'm leaning toward the MPGuino, but being non-removable bothers me a little, and I'm worried I won't be able to install it correctly. So,

1. Does anyone have suggestions?

2. Has anyone put an MPGuino in a prizm before that could help me if I get stuck?

  Reply With Quote
Alt Today
Popular topics

Other popular topics in this forum...

   
Old 01-09-2010, 12:56 PM   #2 (permalink)
dcb
needs more cowbell
 
dcb's Avatar
 
Join Date: Feb 2008
Location:
Posts: 5,038

pimp mobile - '81 suzuki gs 250 t
90 day: 96.29 mpg (US)

schnitzel - '01 Volkswagen Golf TDI
90 day: 53.56 mpg (US)
Thanks: 158
Thanked 267 Times in 210 Posts
If you aren't really sure you understand how to install the guino and/or if it will work w/your vehicle I would suggest the SG. I've heard figures that it is within 3% to 5% accurate which is a huge improvement over nothing. And it comes with warranty and paid support people. The guino is really targeted at pre-96 and geeks on a budget. The truly geeky just build their own mpguino
__________________
WINDMILLS DO NOT WORK THAT WAY!!!
  Reply With Quote
Old 01-09-2010, 03:16 PM   #3 (permalink)
Administrator
 
Daox's Avatar
 
Join Date: Dec 2007
Location: Germantown, WI
Posts: 11,107

CM400E - '81 Honda CM400E
90 day: 51.49 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: 2,431
Thanked 2,482 Times in 1,496 Posts
I'd go for the scangauge. The mpguino is great for preOBDII, but the SG just has so many more features.

Accuracy can be tweaked pretty close, but you really just need to get a baseline. From the baseline you can tell if you are doing better or worse.
__________________
Current project: A better alternator delete
  Reply With Quote
Old 01-11-2010, 08:23 PM   #4 (permalink)
EcoModding Apprentice
 
Join Date: Dec 2009
Location: Wisconsin
Posts: 233

Black Beauty - '13 Hyundai Elantra
Thanks: 71
Thanked 2 Times in 2 Posts
Thanks for the input. I'm a little worried about inaccuracies when the car goes into open loop.

Since the main thing I want to test is efficiency of different modes of acceleration I need to know for sure that it's going to be accurate at full throttle. A couple other threads suggested the scangauge gets off significantly when the air ratio changes (ie: especially in open loop).

That being said, would you still go with a scanguage?
  Reply With Quote
Old 01-11-2010, 10:29 PM   #5 (permalink)
Administrator
 
Daox's Avatar
 
Join Date: Dec 2007
Location: Germantown, WI
Posts: 11,107

CM400E - '81 Honda CM400E
90 day: 51.49 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: 2,431
Thanked 2,482 Times in 1,496 Posts
If you are doing open loop testing, neither will be absolutely accurate. In open loop, fuel is just being wasted to enable easy starting in cold weather, or its injecting extra fuel to cool down the combustion chamber due to ping/knock. You don't know how much extra is being injected. And, there is no easy way to calibrate either of them to get close unfortunately, unless you get on a dyno and do some serious testing.
__________________
Current project: A better alternator delete
  Reply With Quote
Old 01-11-2010, 10:39 PM   #6 (permalink)
dcb
needs more cowbell
 
dcb's Avatar
 
Join Date: Feb 2008
Location:
Posts: 5,038

pimp mobile - '81 suzuki gs 250 t
90 day: 96.29 mpg (US)

schnitzel - '01 Volkswagen Golf TDI
90 day: 53.56 mpg (US)
Thanks: 158
Thanked 267 Times in 210 Posts
well, the guino is watching the injector so it should not be faked out by open loop(and it does display more than one thing at a time), but john you are ultimately responsible for making it work on your vehicle and may have to do your own research to see if it will work and how to make it work (or who to buy a case of beer for to make it work), the guinos are not consumer items where you can try it and send it back if you don't like it, just fyi.
__________________
WINDMILLS DO NOT WORK THAT WAY!!!
  Reply With Quote
Old 01-12-2010, 02:51 PM   #7 (permalink)
EcoModding Apprentice
 
Join Date: Dec 2009
Location: Wisconsin
Posts: 233

Black Beauty - '13 Hyundai Elantra
Thanks: 71
Thanked 2 Times in 2 Posts
Quote:
Originally Posted by dcb View Post
well, the guino is watching the injector so it should not be faked out by open loop
See, that's what I was assuming.

Daox sounds like he's saying there's a way for fuel to get in there that the guino can't see. That doesn't seem likely to me, but my car knowledge is relatively limited. Can anyone reassure me one way or the other?

Provided the guino won't get faked out I would prefer it over the scanguage (price is a factor as well). I'm basically trying to get an idea of just how hard the guino is to install.

I can handle digging up some wires and soldering them, but if it's going to be complete guesswork on which wires I want then I might just say forget it.
  Reply With Quote
Old 01-12-2010, 03:11 PM   #8 (permalink)
Administrator
 
Daox's Avatar
 
Join Date: Dec 2007
Location: Germantown, WI
Posts: 11,107

CM400E - '81 Honda CM400E
90 day: 51.49 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: 2,431
Thanked 2,482 Times in 1,496 Posts
Its pretty easy to install. I have one on my Paseo. Yes, the mpguino is more precise, and it will not be faked out by open loop. For your testing purposes it is a better choice.
__________________
Current project: A better alternator delete
  Reply With Quote
The Following User Says Thank You to Daox For This Useful Post:
justjohn (01-13-2010)
Old 01-13-2010, 10:34 AM   #9 (permalink)
EcoModding Apprentice
 
Join Date: Dec 2009
Location: Wisconsin
Posts: 233

Black Beauty - '13 Hyundai Elantra
Thanks: 71
Thanked 2 Times in 2 Posts
Alright, I'll probably try the mpguino then. If it's the least bit intuitive I'll be able to figure it out, and the worst that can happen is a couple holes in a 14 year old car, right?
  Reply With Quote
Old 01-13-2010, 11:13 AM   #10 (permalink)
Batman Junior
 
MetroMPG's Avatar
 
Join Date: Nov 2007
Location: 1000 Islands, Ontario, Canada
Posts: 21,536

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: 61.98 mpg (US)

Fancy Metro - '14 Mitsubishi Mirage top spec
90 day: 58.72 mpg (US)
Thanks: 3,303
Thanked 6,114 Times in 3,172 Posts
No holes required (for the MPGuino). You just have to find and splice into a few wires.

Also: I can tell you right now, you're unlikely to find that open loop acceleration is more efficient than closed loop.

__________________
Latest mods: 3-cylinder Mitsubishi Mirage. EcoMods now in progress...
Ecodriving test:
Manual vs. automatic transmission MPG showdown



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
MPGuino release one workspace dcb OpenGauge / MPGuino FE computer 1061 01-17-2020 01:37 AM
All default values for MPGuino? JohnNeiferd OpenGauge / MPGuino FE computer 2 09-16-2009 12:24 PM
94 geo motor/tranny swap into a 96 geo body tborgers DIY / How-to 13 12-31-2008 12:15 PM
Trouble w/ Scanguage... 97Cavalier Instrumentation 7 09-15-2008 12:35 PM
Scanguage users - accuracy question Formula413 Instrumentation 7 08-26-2008 04:55 PM



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