So prior to changing my stock rusted fuel lines (which were not leaking at all), the car ran top notch shape. all scanmaster numbers were as they should. Specifically blm's. blm's at idle were 128. During light cruise the blm's would go from 128-138 max. Hit 17psi wiht 93 octane on an extender chip and no knock. Thecar was running great. Idle was steady, fluctuating more than .5 psi. The wideband was always between 14.1-14.8 at idle, which I deemed normal. This was all with a walbro 255lph.
Now my issue is this. After changing the lines to racetronix's fuel line kit (stainless braided teflon lined -8an feed and -6an return) and adding a vented gas cap while using the stock vent line. I left my fuel pressure regulator as it was. Once done with the install, I started the car and noticed my fuel pressure was 45 with vacuum on. Pulled off the vacuum and it rose almost to 50. I was baffled. Lowered it to 45psi vacuum off, as per extender chip instruction. Got the wideband going when I started the car and it was out of normal behavior. It was fluctuating between 13.8-16.1. Then I checked the blms and it was 120 pegged. This all happened yesterday.
Today I messed around with the fuel pressure because I read that adjusting that will tweak the blm's at idle. The more I increased fuel pressure the lower the blm. The lower I made the fuel pressure the higher blm.
I will be buying the 430lph pump that is e85 capable next year, no funds now.
My question is this. Because the feed line is larger, there will need to be more fuel needed to meet the same pressure that was before using smaller lines. So now that I have more volume in my lines going to the injectors, do I need to lower my fuel pressure in order to get the blm's to 128?
Side note, TurboBob or Eric can answer this question definitely, maybe others. When you guys set up the chips for a certain combo and in the instructions it says X psi of fuel pressure, is it to get the blm's exactly at 128 at idle because that is what is needed for stock fuel lines?
Now my issue is this. After changing the lines to racetronix's fuel line kit (stainless braided teflon lined -8an feed and -6an return) and adding a vented gas cap while using the stock vent line. I left my fuel pressure regulator as it was. Once done with the install, I started the car and noticed my fuel pressure was 45 with vacuum on. Pulled off the vacuum and it rose almost to 50. I was baffled. Lowered it to 45psi vacuum off, as per extender chip instruction. Got the wideband going when I started the car and it was out of normal behavior. It was fluctuating between 13.8-16.1. Then I checked the blms and it was 120 pegged. This all happened yesterday.
Today I messed around with the fuel pressure because I read that adjusting that will tweak the blm's at idle. The more I increased fuel pressure the lower the blm. The lower I made the fuel pressure the higher blm.
I will be buying the 430lph pump that is e85 capable next year, no funds now.
My question is this. Because the feed line is larger, there will need to be more fuel needed to meet the same pressure that was before using smaller lines. So now that I have more volume in my lines going to the injectors, do I need to lower my fuel pressure in order to get the blm's to 128?
Side note, TurboBob or Eric can answer this question definitely, maybe others. When you guys set up the chips for a certain combo and in the instructions it says X psi of fuel pressure, is it to get the blm's exactly at 128 at idle because that is what is needed for stock fuel lines?