Edelbrock EFI timing help
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Edelbrock EFI tuning help
I’m more of a diesel guy, so I’m pretty lost in the gas tuning world.
There are several modifiable parameters that I’m not sure how to set up.
Its a 76 with the sequential tuned port L82 motor and 35lb injectors.
Its way too rich at idle.
In the A/R setting, is the higher number more fuel or less?
in the “crank fuel” setting, what does that mean?
There are several modifiable parameters that I’m not sure how to set up.
Its a 76 with the sequential tuned port L82 motor and 35lb injectors.
Its way too rich at idle.
In the A/R setting, is the higher number more fuel or less?
in the “crank fuel” setting, what does that mean?
Last edited by BobRiley; Feb 6, 2019 at 10:39 PM.
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From: San Jose CA
I don't have the edelbrock manual in front of me, but if it's "Air-fuel ratio", that's parts of air to parts of fuel. Air divided by fuel. Bigger number = more air.
Crank fuel typically means a fuel adder during starting, similar to pumping an accelerator pump to get the motor to fire.
Crank fuel typically means a fuel adder during starting, similar to pumping an accelerator pump to get the motor to fire.
Thread Starter
Advanced
Joined: Dec 2018
Posts: 99
Likes: 6
I don't have the edelbrock manual in front of me, but if it's "Air-fuel ratio", that's parts of air to parts of fuel. Air divided by fuel. Bigger number = more air.
Crank fuel typically means a fuel adder during starting, similar to pumping an accelerator pump to get the motor to fire.
Crank fuel typically means a fuel adder during starting, similar to pumping an accelerator pump to get the motor to fire.
How would you decide on crank fuel? Back it off until it’s hard to start and then come back up?
Race Director
Joined: Jan 2000
Posts: 12,399
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From: San Jose CA
How would you decide on crank fuel? Back it off until it’s hard to start and then come back up?
Race Director
Joined: Jan 2000
Posts: 12,399
Likes: 247
From: San Jose CA
The manual describes most of the settings pretty well, though it doesn't give much by way of guidelines for how to tune crank fuel.
https://static.summitracing.com/glob...l-35930_hx.pdf
There's some good pages out there about crank fuel in other applications.
Fitech seems to have a lot of options, and not very helpful for tuning (adjust to improve): https://fitechefi.com/faq/cranking-fuel/
I think your suggestion is good - back it off until it's hard to start then raise it back up until it feels acceptable. You'll probably have to try it in different conditions to see what works best. Also, take a look at how many options there are for crank fuel vs temperature in the app.
Looking into this has made me want to pick this system up. Some day, when I can go to port injection over TB...
https://static.summitracing.com/glob...l-35930_hx.pdf
There's some good pages out there about crank fuel in other applications.
Fitech seems to have a lot of options, and not very helpful for tuning (adjust to improve): https://fitechefi.com/faq/cranking-fuel/
I think your suggestion is good - back it off until it's hard to start then raise it back up until it feels acceptable. You'll probably have to try it in different conditions to see what works best. Also, take a look at how many options there are for crank fuel vs temperature in the app.
Looking into this has made me want to pick this system up. Some day, when I can go to port injection over TB...
