CLASS RACER FORUM - View Single Post - Question about fuel injection from a newbie

BRETV · 05-04-2017, 05:33 PM

14-15 AF is too lean, I have run FAST for years, I think 30lbs are too small for your LT1 and the reason why when you jack the fuel pressure way up and doesn't change the AF is cause the duty cycle on the 30lb injectors is maxed out. If you look on your dashboard screen on your data logger( if it has the built in data logger and if it doesn't you need one) it will show you the duty cycle in %. And it shouldn't be over 90%

Bret Velde
2003 SS/LA

05-04-2017, 05:33 PM	#4
BRETV Senior Member Join Date: Oct 2003 Posts: 538 Likes: 3,914 Liked 716 Times in 179 Posts	Re: Question about fuel injection from a newbie 14-15 AF is too lean, I have run FAST for years, I think 30lbs are too small for your LT1 and the reason why when you jack the fuel pressure way up and doesn't change the AF is cause the duty cycle on the 30lb injectors is maxed out. If you look on your dashboard screen on your data logger( if it has the built in data logger and if it doesn't you need one) it will show you the duty cycle in %. And it shouldn't be over 90% Bret Velde 2003 SS/LA