cooking large boneless prime rib-low heat

Unknown

As a one month owner of the Large Green Egg I have a question on cooking a 15lb boneless prime rib. I have always cooked them in a conventional oven. I start with a 20 min. 500 deg. sear and then cook at 225 deg.calculating at 20 min. lb and pulled at 140 deg.
After cooking some pork loin roasts this past month it seems the Egg's cooking efficientcy makes cooking time faster even at low temps. I'm trying to find out about how much time a pound I should allow for cooking this roast on indirect heat - timing for dinner
225 deg..dome temp. I also heard that the temp should be a little higher due to the roast setting on the grill.

thirdeye

gt,[p]A lot of folks here cook them at those low temperatures. I can't recall ever cooking a boneless one, and would expect them to cook faster than a bone-in one. Hopefully someone will jump in on a time estimate. I am horrible at cook times. 20 to 30 minutes per pound is a WAG from me. Stick the roast with a probe thermometer and keep a keen eye on it, it will be your best tool on a roast as nice as yours. You can adjust pit temps up or down as needed to hit your meal time.[p]I prefer an end sear either in the Egg or under the broiler because I often rest mine longer than most folks and I want to crisp up the outside before slicing. It is difficult to get your Egg back down to 225° if you have it at 500° for searing, so keep that in mind.[p]Here is a link to my cookin' site. A standing rib recipe is in the BEEF section.[p]~thirdeye~

[ul][li]Click Here[/ul]

River Griller

gt,[p]I sear all sides of mine at 500-600 for 2 min per side then close all vents and it takes about 15 min/lb to get up to 130-140 internal temp. I've not done one that large so you may have to open your vents back up because your temp would be too low to fully cook yours.

Unknown

thirdeye,
Thanks for the info. Due to my former job in the Anchorage Fire Dept. cook times were a must. I guess I'll just plug in the meat thermometer and eat when ready. I'm figuring for a 2 hour window on eating times.[p]Thanks for your input!