Gfpakhashcache.bin (2026 Release)

Understanding gfpakhashcache.bin: What It Is and Why It’s on Your Drive

Longer Load Times: The first time you launch the game after deleting the cache, you might notice a "Verification" step or a significantly longer initial loading screen. This is because the engine is re-hashing all the files to create a new cache. gfpakhashcache.bin

It Will Come Back: The next time you launch the associated game or app, the software will notice the file is missing and simply rebuild it. Understanding gfpakhashcache

Is it a virus? Generally, no. If the file is located within a game folder or your Local/AppData folder alongside other gaming software, it is a legitimate system file. gfpakhashcache.bin

10. Final Verdict and Best Practices

Summary Table:

Click to download the Demo version ( 2.xx std. version only demo ).

Click to download the Pdf instructions.

Full version for 99.- € EURO :

Pro version with 0.1 degree resolution 149.- € EURO :

Version that includes the Cam measuring machine controls and schematics for it etc.
costs 199.- € EURO :

Pro version that includes the Cam measuring machine controls and schematics for it etc.
costs 249.- € EURO :

On recieving your order, the Software will be compiled with your Company name on the start Page
and the download link will be mailed to the email address you have used to order.
There are 12 months of free updates included.

You can also mail us for an upgrade price if your purchase is older than 12 months or you want to expand your existing version to Pro :

Short overview.

Start Page:
The program is able to work in both mm and inches.
iIt uses Splines to generate the Valve lift curve, with this approach it is fairly easy to copy any
measured Cam lift curve and then modify it or make new Cam design from scratch.
Splines aren’t as limited as the more common Polynomial curve approach and with Splines it’s easy to
design an asymmetric lift profile. With the adjustable 2 stage smoothing function it’s also easy to get
low Jerk values without compromising the lift curve.

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Design Page with comparison cam shown in grey:

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Zoomed in on the top of the accelleration curve, shows the difference in 1 and 0.1 degree resolution:

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Design Report Page:

Flat tappet with design Cam shown inside the old Cam with larger basecircle.
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Roller Cam shape shown :
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Duration etc. Calc for up to 4 Cams:
Change the centerline and calculate directly the changes in opening, closing degrees, lift
at TDC and eg. 10 deg. before/after TDC etc.
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Compare Curves for up to 4 Cams at the same time:

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Comparison Cam nr. 1 ( 2 and 3 ):
This Page takes its input from the lift data in mm/inch with 0.1, 1 ,2, 4 or 5 degree steps data in the left Window.
For Hand measured Cams there is the option to smooth the generated lift-velocity-accelleration and jerk data.

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Piston movement Page:
Visualize Valve behavior during the overlap phase.
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Cam report Page:
Generates Cam report and/or a Cam Card with specs.

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Static Valve Spring Force Calculating Page:

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Fast Fourier Tranformation analysis:

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Cam explorer Page, only active in the 199.- and 249.- Euro version:
With Interface to the Cam measuring machine electronics .

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A complete reference to parts needed from eg. Ebay is supplied, as well as full schematics
to the wiring and firmware for the Arduino Uno board that controls the Steppermotor/Driver and the
Mitutoyo indicator.
Excluding the Mitutoyo indicator and its SPC cable, the price of parts from Ebay adds up
to just under 400 $ (December 2014)..

July 2020, Linear encoder indicator option included.

An example of a Cam measuring Machine made from the referenced parts ( + an aluminium
profile cut and milled, not supplied ) :

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