Maxium injector duty cycle - OBD-2 software
EFILive V6 has this calculation built in, too.
But you have to select the pulse width param
to be logged, and you're probably best off
doing the calc afterward to free up resources
if your computer is slow.
But you have to select the pulse width param
to be logged, and you're probably best off
doing the calc afterward to free up resources
if your computer is slow.
11 Second Club
Joined: Jul 2002
Posts: 1,426
Likes: 0
From: Beaver Falls, PA
Duty cycle %= inj.PW(mS)/(RPM/30000)
This is electrical duty cycle - remember your actual mechanical open time will be shorter. General target is not to exceed 80% DC Jason
this is from a guy at www.mototron.com i think he knows what's up. check this out too http://www.ecanfix.com/~mdhamilton/dutycycle1.html
This is electrical duty cycle - remember your actual mechanical open time will be shorter. General target is not to exceed 80% DC Jason
this is from a guy at www.mototron.com i think he knows what's up. check this out too http://www.ecanfix.com/~mdhamilton/dutycycle1.html
Originally Posted by Texas Terminator
Duty cycle %= inj.PW(mS)/(RPM/30000)
This is electrical duty cycle - remember your actual mechanical open time will be shorter. General target is not to exceed 80% DC Jason
this is from a guy at www.mototron.com i think he knows what's up. check this out too http://www.ecanfix.com/~mdhamilton/dutycycle1.html
This is electrical duty cycle - remember your actual mechanical open time will be shorter. General target is not to exceed 80% DC Jason
this is from a guy at www.mototron.com i think he knows what's up. check this out too http://www.ecanfix.com/~mdhamilton/dutycycle1.html
For example, if RPM=4000 and pulse width=24ms the duty cycle should be 80%
That formula gives: 24/(4000/30000) = 180%
The table that you linked to is correct though.
The correct formula for duty cycle is the one ChrisB posted.
Regards
Paul
11 Second Club
Joined: Jul 2002
Posts: 1,426
Likes: 0
From: Beaver Falls, PA
Originally Posted by EFIliveV5
Are you sure that formula is for duty cycle?
For example, if RPM=4000 and pulse width=24ms the duty cycle should be 80%
That formula gives: 24/(4000/30000) = 180%
The table that you linked to is correct though.
The correct formula for duty cycle is the one ChrisB posted.
Regards
Paul
For example, if RPM=4000 and pulse width=24ms the duty cycle should be 80%
That formula gives: 24/(4000/30000) = 180%
The table that you linked to is correct though.
The correct formula for duty cycle is the one ChrisB posted.
Regards
Paul
anybody else have any input here?
Trending Topics
LS1 Tech Stories
The Best V8 Stories One Small Block at Time
6 Common C5 Corvette Failures and What's Involved In Repairing Them
Pouria Savadkouei
Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph
Verdad Gallardo
Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked
Pouria Savadkouei
Top 10 Most Powerful Chevy Trucks Ever Made!
Hennessey's New Supercharged Silverado ZR2 Has 700 HP
Verdad Gallardo
Coachbuilt N2A Anteros Is an LS2-Powered C6 Corvette In Italian Clothes
Verdad Gallardo
Awesome K5 Blazer Restomod Comes With C7 Corvette Power
Verdad Gallardo
10 Camaros You Should Never Buy
10 LS Engine Myths That Refuse to Die
Verdad Gallardo 11 Second Club
Joined: Jul 2002
Posts: 1,426
Likes: 0
From: Beaver Falls, PA
ok, he screwed up. that was an injector timing table of some sort that he sent me. the other one is right on. he says just a shorter version of this
Duty cycle %= inj.PW(mS)/(1/(RPM/60000)2)*100
Duty cycle %= inj.PW(mS)/(1/(RPM/60000)2)*100
Right on, here's the simplification...
dc = (pw/((1/(rpm/60000))*2))*100
dc = (pw/(2/(rpm/60000)))*100
dc = (pw*((rpm/60000)/2))*100
dc = (pw*(rpm/120000))*100
dc = pw*(rpm/1200)
dc = pw*rpm/1200
(Hope that's right - been a long time since I did algebra at school.)
Paul
dc = (pw/((1/(rpm/60000))*2))*100
dc = (pw/(2/(rpm/60000)))*100
dc = (pw*((rpm/60000)/2))*100
dc = (pw*(rpm/120000))*100
dc = pw*(rpm/1200)
dc = pw*rpm/1200
(Hope that's right - been a long time since I did algebra at school.)
Paul
11 Second Club
Joined: Jul 2002
Posts: 1,426
Likes: 0
From: Beaver Falls, PA
Originally Posted by EFIliveV5
Right on, here's the simplification...
dc = (pw/((1/(rpm/60000))*2))*100
dc = (pw/(2/(rpm/60000)))*100
dc = (pw*((rpm/60000)/2))*100
dc = (pw*(rpm/120000))*100
dc = pw*(rpm/1200)
dc = pw*rpm/1200
(Hope that's right - been a long time since I did algebra at school.)
Paul
dc = (pw/((1/(rpm/60000))*2))*100
dc = (pw/(2/(rpm/60000)))*100
dc = (pw*((rpm/60000)/2))*100
dc = (pw*(rpm/120000))*100
dc = pw*(rpm/1200)
dc = pw*rpm/1200
(Hope that's right - been a long time since I did algebra at school.)
Paul
Thread Starter
TECH Veteran
Joined: Aug 2002
Posts: 4,055
Likes: 1
From: Hartsdale, NY
Terminator:
...that is a simple equation posted by EFLive:
the last line is the same formula given to me in the first post
duty cycle = injector pulse in milliseconds x RPM/1200
...that is a simple equation posted by EFLive:
the last line is the same formula given to me in the first post
duty cycle = injector pulse in milliseconds x RPM/1200
