Originally Posted by 240M3SRT
Xray, thanks for the inclusive response, this is good stuff!
Out of about 12 different Jerry tunes the only thing we didnt try was richening AFR's via hard ware then leaning it back out down low via software. I am really anticipating results. This was an idea myself and some other members had discussed, but we were at the point of piggy back ecu's. It would be much simpler if Jerry can come through with an appropriate tune. Im suprised that as my tuner he never suggested going this route.
A couple more questions:
If you run the lines directly in and out of the factory fpr as you suggested what happens to the fuel going from the return line down to the tank. Will the fuel tank leak out indefinitely? Does the fpr remain shut 100%, last thing we want is to leak fuel.
Also, you mentioned fuel pressures fluctuating from 80psi to 130. At what load was it where. I assume down low 130 then up top falls off to 80?
Okay I hooked up the fuel pump directly to the new regulator and ran a return line back to the fac return going to the tank. The only line still hooked up to the fact filter is the atmospheric line which is unused. the reason I was getting 130 psi and could not adjust it any lower than 80 is because I did not have a return line hooked up I had the return sealed which meant the regulator had no way to bleed off excess pressure. I am not sure what you are asking about the fuel rail I used the factory supply line and just inserted the new filter and reg in it.
Bulldogger I agree with what you are saying about more volume my question is how do you get more volume with out 1 of 2 things increased pressure or larger diameter fuel lines. I know for a good while now you have been a proponent of the sl55 fuel pump. What kind of AFR's are you running with it. My solution is not cheaper and def takes longer but I just could not figure out how a different pump going thru the same regulator and lines could solve the problem. Please Explain how it works.