Relative compression test

Brand new to scannerdanner,
Pleasecorrect me if im in the wrong category. 

Also pretty new to lab scopes in general, im spending some time with in cylinder pressure waveforms and relative compression tests, collecting good and bad waveforms. A customer brought in a 2008 Chrysler 300 5.7 with a hole in the piston on cylinder 1, thought it would be a great capture.

so here's the waveform. Relative compression and cylinder 1 pressure waveform. 
 i cant quite figure out why the amperage stays so high between cylinders 8 and 4. 
Any insight would be terrific, or point me in the right direction. still working my way through the verus/scope training videos. thanks in advance

im using a snapon modis with a 4 channel scope, snapon low amp probe on 60a scale, and a home made pressure transducer, 0-150psi

I think you may have your amp clamp turned around, backwards. This will cause the wave form to be upside down. Simply, turn the clamp around, or turn on the "invert" feature of the scope.

I flipped your Amp waveform. This is what it would like with the clamp turned around.
 

That just can’t be. With the waveform inverted, cylinder 1 shoes higher compression than all other 7, and cylinder 1 has a hole in it. I’ll see if i can find the picture. 

Let me hop on my laptop and ill post the waveform from cylinder 3, a known good. Shows a much high peak voltage onthe pressure waveform. 

cylinder, known good

Cylinder one, top of piston

Keep in mind that you are not looking at compression. You are looking at starter current. If cylinder #1 has a hole in the piston, that cylinder is cooked. There is, likely, MUCH more friction/resistance in that cylinder than the others. Just my thoughts. I could be wrong.

There should be an arrow on your amp clamp that points in the direction of current.

If you are on a POSITIVE battery cable, the arrow should point AWAY from the battery.
If you are on a NEGATIVE battery cable, the arrow should point TOWARD the  battery.

Yes that’s how my amp probe is oreiented

It is, definitely, an intriguing waveform. Be sure, to update with any findings/conclusions, please.

I will be sure to. Unfortunately, the engine will be sent be sent back to the builder, i doubt ill get to tear down more than oil pan

If youre interested, i found an overlay app that provides some of the function pico has built in, like 720 markers.


anyway, heres cylinder 1 and 3, cylinder 1 is bad, as previoulsy stated. 
upon further research, i suspect the spike in amperage and failure to fall as far between 8 and 4 may be because the crank is still trying to accelerate and make up for lost acceleration on cylinder 1. accepting constructive criticism. 

also i note the intake dip happens much later in cylinder 1 than 3. still working out exactly what i think that means.

So i think, what ive decided i believe, is that the exhaust valve in cylinder 1 also sustained enough damaged to leak substantially, causing pressure to stay equalized until the piston is nearly half way down, close to its peak acceleration.

Please feel free to add or correct me

Based on my RE test on cylinder 3, i suspect my tool may be leaking.. re test on shows cyl 3 amp pull close to 8/4.
Re test on 3, amp pull much lower than 8/4