Competition Diesel.Com - Bringing The BEST Together - View Single Post - Vp44 Injector Pop Pressure theory and testing

paulb · 01-14-2018, 01:09 PM

To me, doing pulls from telephone pole to telephone pole, taking videos of mirrors, seat of the pants power, and cruise EGT's are not valid test methods. Way to subjective.

To me it sounds like the reduced timing with the higher pop pressure injectors spooled the turbo better. Sounds like a flaw in the tune. Timing changes during spool on the VP44 trucks does have it's advantages. That's why they are one of the few generations that actually use the transient timing maps in the ECM.

Testing ideas on these trucks is fun and can be very time consuming. Just make sure that sure that you are using valid data to come to conclusions and not coming up with data to support conclusions you have already made.

Paul

01-14-2018, 01:09 PM	#62
paulb Name: paulb Title: Too Much Time Status: Not Here Join Date: Jul 2006 Location: Klamath Falls, OR Member`s Gallery Posts: 1,673	To me, doing pulls from telephone pole to telephone pole, taking videos of mirrors, seat of the pants power, and cruise EGT's are not valid test methods. Way to subjective. To me it sounds like the reduced timing with the higher pop pressure injectors spooled the turbo better. Sounds like a flaw in the tune. Timing changes during spool on the VP44 trucks does have it's advantages. That's why they are one of the few generations that actually use the transient timing maps in the ECM. Testing ideas on these trucks is fun and can be very time consuming. Just make sure that sure that you are using valid data to come to conclusions and not coming up with data to support conclusions you have already made. Paul __________________ 02 4x4 Auto Mach 6+'s, Drag Comp,Source Automotive Twins, Ultimate Transmission 05 2500 4x4 Auto 3.73 BBI 4's, Smarty Touch, Source Automotive Twins, F1 springs and Cam, Opie's bypass system, Mitusa, PPE Dual Fueler, Ultimate Transmission, Opie shafts,Isspro gauges