I bought a Blackstone a few months back and I'm trying to get the hang of it. The first few pies were pretty good but lately I've been burning the crap out of the bottom of them. I'm using this recipe http://www.fornobravo.com/PDF/Using-caputo-tipo00.pdf. I preheat the oven for about 30 minutes and get the upper and lower stones to between 800-900 degrees according to my temp gun. I then dust the peel with Semonila flour and toss the pie in and after not even a minute or so the bottom burns and the top is fine. I know I'm screwing something up but I have no clue what. I could use some help if anyone would be so kind.
This is a trial and error thing until you get it consistently right. (And then little mistakes will drive you nuts!
Iíd like to say that making a beautiful neo pie is easy, but a lot of factors come into play. My guess from looking at the pictures is that you are 30 degrees too hot on the stone with that first picture when the pie went on Ė maybe 50F on that second char picture. Always measure the same spot. Always measure with the gun distance to the spot the same and make the distance as short as possible without melting the IR gun plastic (I usually position the the gun is a little right of center of entrance/opening). Always measure with the flame at fixed level (eg. Flame on high or off entirely). I donít want to get redundant with Ďalwaysí it is just that in a multivariate problem, keeping things constant helps converge on success.
Iíd suggest you read up on spot ratio, if you havenít already. It will let you know what you are really measuring. Also, try to get the IR gun as perpendicular to the stone as possible so you are measuring more of a circle than an ellipse - and possibly reflecting off the stone to include some temperature readings off of the back wall, etc....
Regarding semolina flour, Iíve had that burn at 850F Ė so if your stone is black, that may be the cause. As Tommy wrote, avoid excessive semolina.
Not all IR guns are well calibrated. That is OK as long as you are consistent with your setup. Next pizza party compare members IR guns (3 is good) and see if you have an odd ball. We did (and HF took it back).
Try measuring the stone with the IR gun. Then turn the flame off and measure again. Youíll likely see 30 degree F drop w/o active flame. That is why Iím suggesting keeping the flame constant (one way or the other) during measure.
Hope this helps you make some progress.