Tweet
Is too much pump a bad thing?
I am using an edelbrock 1790 pump on my coyote swap car because it is what I had on the shelf as a spare for the other car. It's running a -8 pickup, 12" long -8 screen, to a -8 screen filter and -8 up to the regulator, -8 over to the fuel rail to an adapter for the 3/8" line. Return to tank is -6. Pretty typical stuff however....
During long bursts of full throttle and 1/2 tank, the car goes lean during a shift. My fear is that I am emptying the sump in the 03/04 cobra tank and losing fuel pressure. Granted, I wasn't watching the gauge at that time but I am thinking I have too much pump and it's emptying the sump too quickly. The return "splashes" back into the sump but more than likely shoots outside of it. I can probably put an elbow on it to return directly to the sump to fix that.
Pump is old and was set aside as a spare. Sounds "metallic" internally compared to the good one in the Camaro. I think it's going bad but it holds 55# pretty well but changes sounds constantly at idle which tells me the pump is coming apart or is cavatating. I'm surfing around on summit right now looking at a couple of aeromotive pumps which are slightly smaller and a summit pump with a similar rating. Both of which are cheaper than the edelbrock pump.
car has stock injectors, makes around 415 to the wheels and runs at 55# of fuel pressure. A/F is nice around 12.2 to 12.4 when loaded, but it's the lean after a hard 3rd to 4th shift that bugs me.
Plan right now is to put the elbow on the in tank return and replace the pump. Just trying to figure out size of pump. Goal of 500 rwhp will be an upgrade within the next 2 years.
Ideas?
I am using an edelbrock 1790 pump on my coyote swap car because it is what I had on the shelf as a spare for the other car. It's running a -8 pickup, 12" long -8 screen, to a -8 screen filter and -8 up to the regulator, -8 over to the fuel rail to an adapter for the 3/8" line. Return to tank is -6. Pretty typical stuff however....
During long bursts of full throttle and 1/2 tank, the car goes lean during a shift. My fear is that I am emptying the sump in the 03/04 cobra tank and losing fuel pressure. Granted, I wasn't watching the gauge at that time but I am thinking I have too much pump and it's emptying the sump too quickly. The return "splashes" back into the sump but more than likely shoots outside of it. I can probably put an elbow on it to return directly to the sump to fix that.
Pump is old and was set aside as a spare. Sounds "metallic" internally compared to the good one in the Camaro. I think it's going bad but it holds 55# pretty well but changes sounds constantly at idle which tells me the pump is coming apart or is cavatating. I'm surfing around on summit right now looking at a couple of aeromotive pumps which are slightly smaller and a summit pump with a similar rating. Both of which are cheaper than the edelbrock pump.
car has stock injectors, makes around 415 to the wheels and runs at 55# of fuel pressure. A/F is nice around 12.2 to 12.4 when loaded, but it's the lean after a hard 3rd to 4th shift that bugs me.
Plan right now is to put the elbow on the in tank return and replace the pump. Just trying to figure out size of pump. Goal of 500 rwhp will be an upgrade within the next 2 years.
Ideas?
Comment