[max 93]

I installed Edelbrock proflo4 on my car. Does an engine like the same timing with efi as it does with a carb?

[Scott65]

The short answer is yes. But the question should be, will it run better by taking advantage of the ability to have a non linear curve? The answer is only gonna be known by experimentation. But it's a nice option to have.

[max 93]

Not sure that I have the option of a nonlinear curve with the proflo. You set your base timing, set the rpm you want it to start advancing, set the max timing and what rpm you want it by.

[Scott65]

Well if you don't have an actual table, then use the curve you successfully used before. How does it account for vacuum advance scenarios?

[max 93]

There is a setting to add vacuum advance. I would have to read the manual again to see how it calculates that

[JLMounce]

I would be really surprised if the ProFlow 4 had a very basic timing map. There may be a base timing table like you are talking about, but I’m sure if you dig into the manual there is more tuning available.

In regards to the original question, the only time you may see that an engine needs different timing after a change to EFI is if the carb tube was so far off that it effected fuel burn rates.