I think it is the program that Whipple provided with the supercharger but I’m not a hundred percent sure

 

I assume that is the Whipple tune? It's a very safe tune, since you're changing the CR it is probably a good starting point.

Mike

 

The only time I have seen a broken piston on the Whipple tune is from a Clogged Cat.

 

Changing CR by THAT much i can't wait til your tuner runs into torque errors lol.

Please tell me your pistons are designed for DI and have the bowl built into them?

 

The cal is what I would be the most concerned about. That’s a pretty big change. I wonder if adding some displacement could offset the loss in compression and re-align the torque model. You almost meed a professional calibrator. The gen3 aluminator is 9.5/1 and Ford specifically says custom calibration is required.

I don’t think the 5.0 has DI bowls. The divots you see I believe is for spark plug clearance.

 

It literally has to have consideration for DI. If it doesn't it will not work properly and you'll get no benefit from di controlling flame front and propagation from the center out AND in fact it will be detrimental and cause fuel pooling issues at the outer edges which can crack a ringland.

The bowl has to exist and it has to be angled properly towards the injector.

 

There was an interesting discussion about this on the mustang forum because I thought the exact same thing. However, enough evidence was presented that convinced me otherwise. Check out the gen3 coyote piston. The dish is dead center right where the spark plug is and it’s very small, looking nothing like the 2.7 and 3.5 pistons.

 

JE and every aftermarket piston i've seen seem to specifically address it. I honestly trust them more.

 

I became convinced the “dimple” in the 2018+ was for spark plug clearance when someone pointed out that 1) the voodoo is also 12/1 compression but not gdi and it has the same dimples, 2) the Livernois 11/1 compression 2018+ pistons do not have the dimples and 3) the dimple looks nothing like the ecoboost gdi dish in shape or location relative to the direct injector.

Here’s the discussion:

https://www.mustang6g.com/forums/thr....129598/page-5

 

I can ask a GDI expert, i'll reply when they answer me lol.

either way, while it's ALSO for spark plug clearance, all DI aims at where the spark plug fires and every bowl will be where the spark plug is.