The Central Hub for DSM Community and Information

For 1990-1999 Mitsubishi Eclipse, Eagle Talon, Plymouth Laser, and Galant VR-4 Owners. This is where the DSM platform history is documented and archived. Log in to help us in our mission, and to remove most ads from the browsing experience.

injector sizing

This site may earn a commission from merchant affiliate links, including eBay, Amazon, and others.

yes, and pulse width, ummm. thats how long they are on for, which is programed into the ecu, by the manufacture.

CanadianTSi said:
Also, Duty Cycle isn't controlled by anything, it's just a percentage figured out by Pulse Width...
 
Why is it that my 550cc injectors were at 100% duty cycle and when I switched to 720's the DC dropped dramatically? i can understand that the ECU controls DC but wouldn't the ECU do that by info it was receiving?
 
sweet97 said:
Why is it that my 550cc injectors were at 100% duty cycle and when I switched to 720's the DC dropped dramatically? i can understand that the ECU controls DC but wouldn't the ECU do that by info it was receiving?

As I stated above, duty cycle is % on time for the injector.

Duty cycle is not directly controlled, but rather a result of injector pulse width which is controlled by a preprogrammed map based upon several inputs. Obviously using larger injectors means you will have to lower the pulse width(therefore duty cycle) to inject the same volume of fuel.
 
Add Value - Be Respectful - No Trolling - No Misinformation - Participate Often!
Support Vendors who Support the DSM Community

Latest Classifieds

  • For sale 2g 2G Power Window Switches ( tested and hardware included )
    2G Power Window Switches $55 + shipping and paypal fees* Tested 6/2/26 * Hardware included *...
    • jersygsx
    • Updated:
    • Expires
  • For sale VIRGIN 4G63 6-BOLT TURBO HEAD
    Came off a virgin stock AWD Auto 1G DMS (91), also have matching block and crank which are also...
    • The_Partout_Spot
    • Updated:
    • Expires
  • For sale 1G DSM 4G63 6-BOLT TIMING COVER
    Used, see condition in photos. Buyer covers shipping / fees.
    • The_Partout_Spot
    • Updated:
    • Expires
  • For sale Garage clean out
    Changing setups on the car and getting rid of some stuff as well that's been laying around. Will...
    • 92GSXtacy
    • Updated:
    • Expires
  • For sale 4G63 Griffin intercooler cores
    Griffin intercooler cores. Top to bottom flow. High cfm and heat transfer. 24x8x2.75 and...
    • Galant665
    • Updated:
Back
Top