ESS Centrifugal Mustang Superchargers

[Exploded_Muffin]

Thank you sir!! Lowest the pressure dropped to was 58psi , running the VMP rails.

Are these your rails?
https://www.vmpperformance.com/2018-Fuel-Rail-Kit-for-non-PD-Supercharged-Vehicles

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[cbrtrx]

I'll answer this one for him, he's running VMP's 2018-up fuel rail that connects to the HPFP in the same manner that the factory does, so it has one port on each side. I'm looking at these as well.

Just to clarify like I've already posted it does not feed the HPFP the same as stock. Look at your stock setup it does not feed from the passenger rail at all. Also the VMP kit relocates the fuel rail pressure sensor. These are just some things to take into consideration while evaluating data.

 

[kenand1988]

Just to clarify like I've already posted it does not feed the HPFP the same as stock. Look at your stock setup it does not feed from the passenger rail at all. Also the VMP kit relocates the fuel rail pressure sensor. These are just some things to take into consideration while evaluating data.

It would seem that hasn't negatively impacted the pressures though.

 

[cbrtrx]

It would seem that hasn't negatively impacted the pressures though.

How would you know though the pressure reading you're logging is from that sensor but now the location has changed. Placement can make a difference under wot high demand situations especially in a returnless setup like he is running.

 

[kenand1988]

How would you know though the pressure reading you're logging is from that sensor. Placement can make a difference under wot high demand situations especially in a returnless setup like he is running.

Ah I see what you mean. Some rails you can change the sensor location. If it's holding command EQ and the rail pressure and low side pressure are good I would assume everything is good.

 

[kenand1988]

How would you know though the pressure reading you're logging is from that sensor but now the location has changed. Placement can make a difference under wot high demand situations especially in a returnless setup like he is running.

Can you explain more though? When I log I see rail pressure and lift pump pressure. Lift pump is the low side I'm assuming there is a sensor within the pump? An average at idle reading for that would be around 65 psi. But the rail pressure is in the thousands. If that sensor is reading the rail pressure then how is it so high BEFORE feeding the hpfp. I must be missing something because I just assumed the hpfp was what caused that high pressure reading.

 

[Andy13186]

In logs does FLP stand for fuel line pressure or fuel lift pump?

 

[kenand1988]

The pids I use are lift pump actual and lift pump desired

 

[cbrtrx]

Can you explain more though? When I log I see rail pressure and lift pump pressure. Lift pump is the low side I'm assuming there is a sensor within the pump? An average at idle reading for that would be around 65 psi. But the rail pressure is in the thousands. If that sensor is reading the rail pressure then how is it so high BEFORE feeding the hpfp. I must be missing something because I just assumed the hpfp was what caused that high pressure reading.

The factory in tank pump has a regulator built into the hat, pressures can change from different demands placed onto the pump and or change of the pump. The low side pressure reading you're logging is off of a fuel rail sensor on the drivers side rail in a dead head system. The HPFP has a separate pressure sensor. As long as the HPFP is supplied above about 35 psi it will still be able to produce full pressure to the high side. As low side pressure drops the ECU commands the low side injectors to increase their injector duty cycle as much as possible to try to keep up assuming you have enough low side injector.

From a log he posted on his car his short terms were -13 percent WOT and commanded EQ was not even close to actual. Being that his low side pressure sensor has moved to a distrubtion block I'd focus more on his WOT trims then solely going off of pressure drop now. I'm sure it's working better then factory but considering the changes made I'd look closer into the trims to tell how much it has improved. I already mentioned that when he posted but there was no response.

 

[kenand1988]

The factory in tank pump has a regulator built into the hat, pressures can change from different demands placed onto the pump and or change of the pump. The low side pressure reading you're logging is off of a fuel rail sensor on the drivers side rail in a dead head system. The HPFP has a separate pressure sensor. As long as the HPFP is supplied above about 35 psi it will still be able to produce full pressure to the high side. As low side pressure drops the ECU commands the low side injectors to increase their injector duty cycle as much as possible to try to keep up assuming you have enough low side injector.

From a log he posted on his car his short terms were -13 percent WOT and commanded EQ was not even close to actual. Being that his low side pressure sensor has moved to a distrubtion block I'd focus more on his WOT trims then solely going off of pressure drop now. I'm sure it's working better then factory but considering the changes made I'd look closer into the trims to tell how much it has improved. I already mentioned that when he posted but there was no response.

That is confusing. So the lift pump pressure reading is on the rail taken from the driver side sensor and the pid "rail pressure" is the hpfp's own sensor

 

[cbrtrx]

That is confusing. So the lift pump pressure reading is on the rail taken from the driver side sensor and the pid "rail pressure" is the hpfp's own sensor

Correct.

 

[kenand1988]

Correct.

I see. I had thought you were talking about starving the high side since the new rail is setup differently but the sensor youte talking about is the low side sensor. I guess I could see how maybe there is less of a drop in pressure simply by how the rail is setup but I don't see how you couldn't use the rail pressure pid to accurately see if you are losing any supply pressure. I did not see the log you're referring to.

 

[TEXAS HEAT]

Just to clarify like I've already posted it does not feed the HPFP the same as stock. Look at your stock setup it does not feed from the passenger rail at all. Also the VMP kit relocates the fuel rail pressure sensor. These are just some things to take into consideration while evaluating data.

Okay, I see what you're saying regarding the change in the way it is fed fuel and do understand that these changes can potentially effect the data based on the physical changes to the fuel rail.

To elaborate contextually; when logging one should pay close attention to how the stft's behave at WOT to determine if the fuel supply is adequate despite the low side pressure readings indicating that the low side fuel pressure is at an acceptable value. Am I understanding this correctly?

 

[TEXAS HEAT]

First 1/8 pass of the day! Went to the 115mm pulley.

Hey Brad. How the hell are you 60 footing in the 1.4's???

 

[Brad1810r80]

My tuner has been working a lot on lower rpm when you transition into boost . It’s helped a lot. For stock converter/centrifugal combo I’m happy. It has little more in it I believe. Possibly 1.45 or so.

Hey Brad. How the hell are you 60 footing in the 1.4's???

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