Go Back   EcoModder Forum > EcoModding > Fossil Fuel Free
Register Now
 Register Now
 

Reply  Post New Thread
 
Submit Tools LinkBack Thread Tools
Old 04-18-2013, 02:11 AM   #1 (permalink)
EcoModding Apprentice
 
Join Date: Dec 2011
Location: Minnesota
Posts: 201
Thanks: 45
Thanked 8 Times in 7 Posts
SVO vs Biodiesel and the Idaho Univ studies

After having read the Idaho University Idaho Wvo Study about the problems of the use of straight SVO/WVO i've developed some doubts about my initial desire to use SVO. Yet I don't really want to run biodiesel either because of the cost and hassle of extra processing steps if I can help it.

Is there anyone familiar with the studies and able to offer some kind of counterpoint? I've heard people say that the problems come from running cold SVO in cold engines, yet I doubt all those studies indicating 1000+ hrs of use in farm fields and stuff ran an engine that never hit operating temperature unless it was ultra short use cycles of a few minutes.

I'm curious whether certain things could mitigate the problems - water injection to clean carbon (i've been told it tends to 'steam clean' chambers), more often oil changes to deal with the "polluting of lubrication" issue (along with oil testing, trying to track exactly what really occurs, and possibly something else to counter it), or finding out what kind of 'degumming additive' made the one test on an indirect injection engine seem to work with no problems even after 2000 hours.

  Reply With Quote
Alt Today
Popular topics

Other popular topics in this forum...

   
Old 04-18-2013, 03:50 PM   #2 (permalink)
UFO
Master EcoModder
 
UFO's Avatar
 
Join Date: Sep 2010
Location: Denver, CO
Posts: 1,300

Colorado - '17 Chevrolet Colorado 4x4 LT
90 day: 23.07 mpg (US)
Thanks: 315
Thanked 178 Times in 138 Posts
Correct me if I read that wrong, I have not read it in detail, but this study is about using unheated oil in diesel engines. If you heat your oil and fuel only in a warm engine you will not have long term issues with the following caveats:

Water cooled, indirect injection only.
Change engine oil frequently.
Purge the vegetable before shutting the engine off.

That severely limits your engine choice, but there are thousands of successful VO conversions, some of them even in direct injection engines. But it eliminates all modern engines.

I have not heard of any effective mitigation once VO polymerization sets in though. I don't know if water injection prevents it either.
__________________
I'm not coasting, I'm shifting slowly.
  Reply With Quote
Old 04-19-2013, 02:35 AM   #3 (permalink)
It's all about Diesel
 
cRiPpLe_rOoStEr's Avatar
 
Join Date: Oct 2012
Location: Porto Alegre, Rio Grande do Sul, Brazil
Posts: 9,914
Thanks: 0
Thanked 1,180 Times in 1,041 Posts
Some engines tend to be more tolerant to SVO and WVO, such as the earlier Volkswagen IDIs, Mercedes-BenzOM616/617, Peugeot XUD9 and the Fiat TD70 (1.7L, 70hp turbocharged IDI with mechanical injection). A way to overcome the issues related to glycerin polymerization is related to the pre-heating. A good set of glowplugs or a grid-heater can help to deal with the oil even in cold start.

And older mechanically-injected engines are better, but it's not impossible to tune an electronically-controlled engine to work with some veg oil blends even with a single-tank setup. Eventually, even a tank heater could be fitted, I've already seen it in some Scania buses, and it worked even with regular Diesel fuel.
  Reply With Quote
Old 04-19-2013, 02:38 AM   #4 (permalink)
(:
 
Frank Lee's Avatar
 
Join Date: Jan 2008
Location: up north
Posts: 12,761

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: 1,585
Thanked 3,546 Times in 2,215 Posts
How about the Mazda/Ford 2.0 indirect injection diesels from the mid '80s?
__________________


  Reply With Quote
Old 04-19-2013, 02:52 AM   #5 (permalink)
It's all about Diesel
 
cRiPpLe_rOoStEr's Avatar
 
Join Date: Oct 2012
Location: Porto Alegre, Rio Grande do Sul, Brazil
Posts: 9,914
Thanks: 0
Thanked 1,180 Times in 1,041 Posts
Quote:
Originally Posted by Frank Lee View Post
How about the Mazda/Ford 2.0 indirect injection diesels from the mid '80s?
Also a good option. I've been aware of some old Mazda IDIs running on veg oil. Another good option could be the Nissan TD27.

  Reply With Quote
Reply  Post New Thread


Thread Tools




Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2021, vBulletin Solutions Inc.
Content Relevant URLs by vBSEO 3.5.2
All content copyright EcoModder.com