Please check my sig for details. However, if my injectors flow 30#/hr fuel rate at 85% duty cycle, having the TTA fuel pump, would I run out of fuel and loose fuel pressure. I have the TTA pump at 236#/hr. (first of all, is this correct?). Straight math is 30 x 8 x 0.85 = 204#/hr. Is this reliable?

 

Assuming no losses. In reality, there's plenty of losses so really the best way to check it is to watch the fuel pressure. Is the car leaning out? Have a reason to suspect lack of flow rather than wrong tune?

I dont remember what the TTA pump flows but that sounds within the ballpark.

 

Yea, the final proof is taping the fuel pressure gauge to the wiper, and nail that thing! HAHAHA.

 

30lb injectors is cutting it close. What RPM are you turning the motor up to?

I have 36lb injectors with a 406 and a miniram. I shift at 6800 and go through the lights around 6500. I have the holley 255 pump in tank with the stock fuel lines. No problems yet with this setup.

 

I went to 36lb'ers also, now the duty cycle is 74-75%, with the 30's it was in the high 80%'s. I have the walbro 255 hot wire kit and stock fuel lines also.

 

I will be shifting at 5800 RPM, peak Hp is in the range between 5600 & 5800 RPM.

When you guys are running the 36 #/hr injectors, what fuel pressure are you using?

 

I am using around 40psi in mine. On the dyno, it was what the motor liked best.