Tri Tip is a great cut of meat, flavorful and tender... BUT!
You must cut this meat on the bias or it will be tough!
I have a smoker, gas grill, and
weber kettle. My preferred way of cooking a Tri Tip is on
the kettle, with a very hot fire. I use a home made divider to split the briquette grate so hot coals on one side, nothing other. The divider is about 3.5 inches high. I use about a starter can with Kingsford Briquettes stack really high over the top, and about 10-15 unlit. Light the briquettes and wait till all are lit dump on cooking side, I then add the unlit extra briquettes. I put the lid on the weber and wait about 6 or 7 minutes and clean hot side of grill, turn grill so unclean section is over coals, cover and 5 min. later clean the other half of grill. You can now lube with cooking oil or go ahead and add meat. Depending on the thickness of your cut the meat will cook 6-10 minutes per side with lid on all vents wide open, only turn the meat once. If the exterior has the look you want but the internal hasn't reached 135-140, then move meat to cold side of grill and finish there. Once the meat has reached temp, cover with foil remove and let sit 10-20 minutes. I should add that you really want about 10 minutes on the cold side to get some smoke on the meat, so move it at about 120. Sometimes my fire is too hot so it gets cooked before i get that cold side cooking.
You can just add salt & fresh ground pepper and some garlic powder and a tri-tip will taste great. I use McCormicks steak season and extra fresh ground pepper. There are lots of Tri-tip marinades on the net, they taste great too. My family likes trying different marinades so we do that, but I try to stay close to traditional
Santa Maria style.