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

Reply  Post New Thread
 
Submit Tools LinkBack Thread Tools
Old 06-18-2010, 01:09 AM   #11 (permalink)
EcoModding Lurker
 
Join Date: Dec 2009
Location: Sunny Arizona
Posts: 53
Thanks: 0
Thanked 8 Times in 6 Posts
Miles per hour divided by gallons per hour = miles per gallon in my book. Miles per hour is pretty easy, gallons per hour is more difficult especially if you can't get a place to measure it upstream of the injector spill return. A lot of Diesels dump the spill back to the tank to keep the fuel temp low. It sure would be nice to get a real time measurement. I don't know what cruise speed will optimize the mileage on my '81 Rabbit Diesel, but it sure seems like it is about 55 mph, maybe quite a bit higher when drafting.

Air flow is neither here nor there. Not sure why anyone would even try to measure it on a Diesel, unless it was for trend monitoring, like: Is the turbo performance what it used to be?

  Reply With Quote
The Following User Says Thank You to Crazyrabbit For This Useful Post:
Imatech (07-09-2010)
Alt Today
Popular topics

Other popular topics in this forum...

   
Old 06-18-2010, 08:47 AM   #12 (permalink)
Master EcoModder
 
tasdrouille's Avatar
 
Join Date: Jan 2008
Location: Mirabel, QC
Posts: 1,672

The Guzzler - '08 Hyundai Elantra GL
90 day: 33.12 mpg (US)

Got Soul? - '11 Kia Soul 2U
Thanks: 35
Thanked 85 Times in 56 Posts
Quote:
Originally Posted by Crazyrabbit View Post
Air flow is neither here nor there. Not sure why anyone would even try to measure it on a Diesel, unless it was for trend monitoring, like: Is the turbo performance what it used to be?
They wanted the engine not to smoke under any circumstances, and keep the EGT low. If you don't monitor airflow and you have a gunked up intake from crankcase vent oil and egr soot, you'll get smoke out the back under high load and high EGT.
__________________



www.HyperKilometreur.com - Quand chaque goutte compte...
  Reply With Quote
Old 06-21-2010, 08:09 PM   #13 (permalink)
home of the odd vehicles
 
rmay635703's Avatar
 
Join Date: Jun 2008
Location: Somewhere in WI
Posts: 3,563

Silver - '10 Chevy Cobalt XFE
Thanks: 410
Thanked 763 Times in 573 Posts
Quote:
Originally Posted by tasdrouille View Post
They wanted the engine not to smoke under any circumstances, and keep the EGT low. If you don't monitor airflow and you have a gunked up intake from crankcase vent oil and egr soot, you'll get smoke out the back under high load and high EGT.
In terms of a fuel economy gauge its still a moot point though, unless of coarse you are bumping against the limit on your throttle which a good ecomodder doesn't do anyway.
  Reply With Quote
Old 07-09-2010, 08:42 PM   #14 (permalink)
EcoModding Lurker
 
Join Date: Jul 2010
Location: usa western Pa.
Posts: 12
Thanks: 4
Thanked 2 Times in 2 Posts
Good records will always show you where you going wrong.

  Reply With Quote
Reply  Post New Thread


Thread Tools


Similar Threads
Thread Thread Starter Forum Replies Last Post
97-99.0 VW Golf / Jetta Diesel, good cars? canhonkey General Efficiency Discussion 5 01-24-2013 11:17 PM
News: VW to unveil 70 mpg (US) Golf diesel hybrid MetroMPG Hybrids 27 06-29-2010 08:50 AM
1977 VW Beetle diesel conversion on oakland craigslist! JQmile EcoModding Central 58 10-28-2009 03:37 PM
Wanted (1st gen VW turbo diesel) 3lr For Sale 19 10-28-2008 04:28 AM
(long) Scangauge II vs. old European diesel Renault groar Instrumentation 0 08-13-2008 06:40 PM



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