ok i am running a walbro 255 fuel pump with a pressure regulator. i have a v afc waiting to be installed in about a month. my question is that with the tuning the afc do i still need to get a FPR for my car, and if i do i hate to say it but can i get away with one of the cheap ebay ones. thanks in advance .

 

Don't mind my stupid question.....but whats "FPR"?

 

fuel pressure regulator, it's not stupid there was a time when i didn't know.

 

don't mind me, I am just still awake


Back on topic. I wouldn't trust those cheap e-bay ones to last very long. Remember, this thing is making sure you have correct fuel pressure going to your engine when it needs it

 

Help me out..Doesn't the car have one? is your question "can I remove it"?

 

Can anyon just explain this in english? It's Late and my mind is slowing down..time for sleep!

 

A fuel pressure regulator is used to maintain constant fuel pressure across the fuel injectors. This ensures accurate fuel delivery to the combustion chamber. The fuel pressure regulator should be sized correctly with the fuel pump to achieve the maximum flow of the bigger fuel pump.

 

bump it ttt

 

I think Sloppymax has a Megan Racing FPR that he got off eBay. I think they work decently well.

If your main question is to whether you need a FPR along with an AFC to adjust A/F, I think the answer is no. But then again, I don't know how the Walbro fuel pump changes things. There are many of us who have used SAFC-II/VAFC-IIs to tune A/F and have not needed to get a FPR.

 

Btw Blake, there are a couple of good discussions of related topics in the All Motor forum; search for SR20DEN's timing advance thread, that's a good one.

 

throwing nitrous into the equation takes out most of what i know but when you are running motor which is most often, that 255 would be causing you to run rich. my walbro 190 had me in low 12's for air/fuel. the fpr will allow you back fuel out to have better mixture for all motor but you could still run a safe enough mixture for the nitrous. the megan universal fpr has worked great for me. SR has run it so i have a returnless system like the 3.5 for cooler fuel along with the ability to bump up the fuel pressure and back it out with the vafc2 for indirect, increased timing. i realize that you do not want too high of a timing for the nitrous but just for fyi.

 

any other answers to this question, and thanks for the replies guys

 

Thanks for the answer on my "dumb" question, now everything clear.