I was curious if there was a way to figure out what FPR I have. I have a stock FPR, but I am not sure if it came from a b16 or b18. I have heard that the b18 FPR produces a slightly higher pressure? Is there a way to tell?

 

I have around 15 different fuel rails from h22a's, b18's, b16'a, d16's, d15's, etc they are all externally the same. The spring that is located inside of the fpr is what is going to give you the higher base fuel pressure. There isnt any external marking so that you can visually identify what you have. The two ways that I know to measure your base fuel pressure would be either a fuel pressure gauge, or find the spring rate of the spring inside the fpr and calculate the fuel pressure at cranking from that.

 

Hey, boosted hybrid
which fpr from what model, is best to use?

 

That's what I thought. I was thinkin the same, thing, but wanted to make sure. THANKS!