Restricter plate - Page 3 - Fuelly Forums

Click here to see important news regarding the aCar App

Thread Tools Display Modes
Old 01-07-2007, 05:27 AM   #21
Registered Member
Join Date: Dec 2006
Posts: 84
Country: United States

Your 1st paragraph IS exactly what caused me to wonder how this would work at all.

Apparently it will work on newer vehicles?

brelandt is offline   Reply With Quote
Old 01-07-2007, 08:14 PM   #22
Registered Member
AlexK's Avatar
Join Date: Aug 2006
Posts: 42
Country: United States
I supose you can get away with running wide open throttle in a high gear/low engine speeds on some cars...
I run 90% (not 100%) for exactly the reasons you stated. With fuel injection the computer thinks you want max power if you give 100% throttle and goes into open loop control (ignores the oxygen sensor) and dumps in lots of fuel. That is bad.

Your comment about deisel engines being regulated by fuel delivery and not a throttle plate... that is one of the reasons they get better mpg than gas engines at partial throttle. No pumping losses across a throttle pate.

the problem of pumping loss as I understand it:
A partially open throttle reduces the manifold pressure, which reduces the pressure on top of the piston as it is travelling downward, sucking in air/fuel. Since the pressure on top of the piston is much less than the crankcase pressure, the pressure force is working against the piston (slowing the engine). At 90% throttle opening the manifold pressure is higher and it isn't as bad.

Just some thoughts and I am happy that there is a forum like this to further ones education. I love to learn about this stuff!
I agree!

AlexK is offline   Reply With Quote

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

Similar Threads
Thread Thread Starter Forum Replies Last Post
Show Running Average in Forum Signature lhwj Fuelly Web Support and Community News 1 08-20-2011 01:24 AM
TIME field missing in Add a fuel-up machapelle Fuelly Web Support and Community News 5 08-19-2011 09:54 AM
how's your MPG compared to others with the same car? MetroMPG General Fuel Topics 21 02-20-2009 03:37 PM
Seriously Considering an Import (Literally) rh77 General Discussion (Off-Topic) 5 03-24-2006 10:18 PM

» Fuelly iOS Apps
Powered by vBadvanced CMPS v3.2.3

All times are GMT -8. The time now is 05:49 PM.

Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2018, vBulletin Solutions, Inc.