If it's a new build. And your already on the engine dyno. With the EFI installed. You might as well get good base tune. If you install EFI on engine already in the car. Do yourself a favor and chassis dyno tune it. Yeah you can drive it in self tune/learn. But your gonna play haiti hitting all your upper KPA load cells. That's why you will hear "Yeah the more I drove it the better it got". But it will take some miles to do it. On the street or HWY with it in self tune/learn. If you got any kinda of power. Hitting a 80-90 KPA @5500 RPM. I promise you will be north of 100 mph. Not a real safe thing to be doing. So if you can. Get it dynoed. Chassis or Engine dyno. It is better.