Cooking times for tri-tip can vary depending on the size of the cut, the desired level of doneness, and the temperature you're using. However, as a general guideline, you can use the following cooking times for a tri-tip in the oven:
Preheat your oven to 425°F (220°C).
Place the tri-tip on a rack in a shallow roasting pan or a baking sheet lined with foil.
Cook the tri-tip for about 25-30 minutes for medium-rare or until the internal temperature reaches 130-135°F (55-57°C) using a meat thermometer. Keep in mind that the temperature will rise a few degrees as the meat rests.
If you prefer a higher level of doneness, continue cooking for a few more minutes. For medium, aim for an internal temperature of 140-145°F (60-63°C). For medium-well, aim for 150-155°F (66-68°C).
Once the tri-tip reaches your desired level of doneness, remove it from the oven and let it rest for 10-15 minutes. This allows the juices to redistribute and the meat to become more tender.
Remember, these are general guidelines, and actual cooking times may vary depending on the specifics of your oven and the thickness of the tri-tip. It's always a good idea to use a meat thermometer to ensure the desired level of doneness and avoid overcooking.