ZR-1 High Pressure Fuel pump 12711668 in 2015 L83 5.3L Copy pump settings?

[realspeeddan]

To run the ZR-1/Z06 High Pressure Fuel pump 12711668 in a 2015 Silverado 5.3L, should I copy all of the Injection Refill and Pulse Paramaters (Leading edge, Trailing edge, Peak duration etc.) from the 2019 ZR1 file?


Customer brought in the fuel pump, along with the ZR1 injectors and a BTR stage 2 DOD delete cam. The cam card lists the fuel lobe as 14% / 6.5mm.

[STAGEUP]

Use injector data from a C7 Z06 and edit the fuel pump axis to match the 14% lobe.

[realspeeddan]

I looked up a 2016 Z06 file and compared it to the 2019 ZR1 file and the injector values are different. The base flow rate is pretty close, 138.5 vs 140.7 lb/hr, but the pressure multipliers and offsets are quite a bit different as well.

Forgive my ignorance, but are they the same injectors and GM just characterized them differently, or are they different parts?


And for the high pressure pump values, the ZR1 and the Z06 are the same. So should I put in the ZO6 pump values and THEN scale the axis 14% for the cam lobe?

[GHuggins]

I would only use the newer injector characterizations in engines using the same tables such as the E90 ECM's. They are the same part, but characterization seems to have been changed for the ones running the newer tables.

Use the lt4's pump values then change the axis by the lobe increase.

[realspeeddan]

Thanks for the replies. I copied over the Leading/trailing edge angles. Should I copy the Peak Duration and Peak duration Temperature Multipliers also?

Also in the fuel pressure feedback section, the Z06 has twice as large Integral Gain (+/- 4.0 vs +/- 2.0). The other gains are the same. Would you use the gains for the Z06?

And what about the pressure limits? The Z06 has much higher base desired pressure and also higher pressure limits. I'm thinking (1) even with E85 we won't need as much fuel as a Z06, and (B) The truck fuel system may not be designed to handle as high pressure as the Z06. Therefore I am inclined to leave all the truck pressure values. What do you think?

[GHuggins]

Thanks for the replies. I copied over the Leading/trailing edge angles. Should I copy the Peak Duration and Peak duration Temperature Multipliers also? Yes

Also in the fuel pressure feedback section, the Z06 has twice as large Integral Gain (+/- 4.0 vs +/- 2.0). The other gains are the same. Would you use the gains for the Z06? Yes

And what about the pressure limits? The Z06 has much higher base desired pressure and also higher pressure limits. I'm thinking (1) even with E85 we won't need as much fuel as a Z06, and (B) The truck fuel system may not be designed to handle as high pressure as the Z06. Therefore I am inclined to leave all the truck pressure values. What do you think? Use the trucks. If 6.2l truck - those injectors can handle a very high pressure / if a 5.3, those can handle the stock lt4 values, but don't go much higher