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Pilot orifice is a made up term, pilot injection is a complete separate injection event. The nozzle pictured below has been running in a large cubic inch Detroit since 2017, just didn't have any cool names for it.

Here is a comparison of the same turbocharger with a few alterations to the compressor design, but the blade count/configuration was not changed.

Hard to do that with a turbine exducer the same size as the compressor inducer.

Trevor has my cell number, he can call me any time, and he knows that.

Cummins 24v 5x0.025" injector set Pro Street/Limited Pro Stock setup 140° cone angle - $1000 shipped

Selling for a customer - $500 shipped

Cummins 12v 5x0.030" billet triple feed injector set for sale, message for details - $3150 shipped with return line kit

Borg Warner is rather clear on their recommendations, I am unsure why this information isn't more common.

You can get an 1/8" NPT inline adjustable air control valve for under $40, simple parts kit with a better spring and you are set.

If the compressor wheel/housing is held constant, than using a ground clipped turbine vs the original casting, the difference in flow would not have a large impact on power directly. Clipping a turbine as such often reacts very similar to running a larger turbine housing on an unclipped turbine...

This is a good point, and I'm glad you brought it up because it is specific to the common failures seen in diesel applications with the S400 SX-E compressor designs. Borg Warner pulled a bit of a fast one that I don't think most people pick up on, if we compare the 76mm SX3 and 76mm SX-E...

Cast S464 compressor on top, cast S471 compressor on bottom, as you can see they are very different blade designs.

Major vertical grid lines are 10hp.

Boost comparison below, all compressors were similar design using the same inducer size, the GT50 and HX60 were the same design. Testing is done in a climate controlled surrounding on a negative sweep, no changes in fuel setting or timing advance, we look at both observed and corrected data and...

Again very different turbine designs yet similar results.

As long as the turbine creates enough shaft power to run the compressor the affect the design difference has on power is minimal. Certain turbine designs will run much more compressor for their given size compared to others, however this is typically only important in cases where there is a...

Calculating compression and piston design is part of what I do, using same piston and only increasing protrusion 0.010" you would need to reduce chamber volume 2cc's to get just over 18:1, which I find unlikely.

DDP Precision Flow 20 injector set 8x0.008" VCO nozzle - 75hp Inspected and tested Price includes shipping

Cummins exhaust manifold stud replacement kit. External 7mm hex for installation, direct OEM replacement allows the factory heat shield to be retained if desired. Made in the USA from corrosion resistant high strength stainless steel.