Edelbrock Vari injection control box
Moderator: Team
Edelbrock Vari injection control box
Greetings, I have a new Edelbrock vari injection system I installed on my 383 Vette. It works, but I want to adjust it so it comes on later. It has a circuit board with 4,6 & 8 cylinder selectors. Can I select the 4 or 6 setting to reduce the signal in an effort to raise the rpm turn on? Also I would like to lower the vacuum setting to delay the start of pump spray. I realize I could install a Hobbs switch rated at about 4-5” vacuum to trigger the motor directly, but I would like to use the system. It is nice and a good fit for the theme of the car. Thnx.
Re: Edelbrock Vari injection control box
For those thinking EFI, it might help mentioning this is a very much older low pressure pump water/alcohol injection system. The principle behind the Varajection is sound, and many worked quite well; however, if something does go wrong the failure mode is filling a cylinder with water. Do you want to take that risk?
As to adjusting, not sure what the four or six cylinder mode is counting; most likely would change how much.
And vacuum is vacuum. It doesn't know how many cylinders, just how low the switch trigger threshold.
As to adjusting, not sure what the four or six cylinder mode is counting; most likely would change how much.
And vacuum is vacuum. It doesn't know how many cylinders, just how low the switch trigger threshold.
Jack Vines
Studebaker-Packard V8 Limited
Obsolete Engineering
Studebaker-Packard V8 Limited
Obsolete Engineering
Re: Edelbrock Vari injection control box
Good clarification on the type of injection! I installed the kit with care, so I don’t have many concerns about cylinder filling.