Is the burnout the same whether its a 5000 plus stall or a 3500 stall convertor. Im having trouble with my burnout as my tires arent getting hot or smoking. Im turning 6ooo rpm and its like the tires arnt turning much.

which gear ?

a 5000 rpm converter should spin the tires in water easily from 3 - 4000...

What gear are you in? I do my burnout in secound gear. Seems to get em spinning fairly fast. If you have really steep gears start in secound and go to third.

Im starting in second gear shift into third. I run 4.88 gears.

Are you using a line lock and just holding the brake pedal?

Are you sitting in the water or pulling out of it first!
2nd to 3rd 6000 rpm works great!

Drive through water not sitting in it. Pump brakes hit the lock, start in second shift third it hits 6000 hold about 5 sec release line lock roll out. Problem im having is there is no tire smoke.

They are fairly new. I start to feel a bit of a shudder or vibration in rear when im doing the burnout.

Have someone who you trust watch or video the burn out, if the tires grab in the burnout and quit spinning (when it is shuttering) that is really hard on the converter if you keep your foot in the carb with the line lock on Do you know what RPM your converter locks up at in 2nd and high gear? Do you watch the tach during the burn outs? I have one converter that will quit spinning the tires in high gear if the RPM drop below 4500 RPM I do as already said, rev it in 2nd to break the tires loose and shift into high right away keeping the tires spinning, count around three after seeing smoke in high gear(keep it above 5000 RPM but not above 6500 RPM ) and let off the line lock and let it roll out until it grabs. I let off some on the throttle after I let the line lock button go also You can feel the tires grab, once they bite, let off the throttle all the way

I start in 2nd and get revs up shift 3rd. I see it hit my shift lite at 6200 thats where I feel some shudder. this seems to be about an 8 -10 sec burnout no smoke. When I release line lock and roll out slowly lifting I can feel the tires grab a little. I am still getting high 1.6 sixtys and my launch sets me back in the seat. I just know theres more there. Just cant get the tires hot or smoke. Maybe I need to stay in longer it just seems like reving it to long.

You need some video so you can see what is really going on. If you are really doing a burnout that long at that rpm with no smoke, there is a good chance something else is slipping.

If there is a slipping convertor or a trany woudnt i see that going down the track. running the track all feels and runs fine.

That's what the video of the burnout is for. Maybe you're not out of the water as far as you thought you were, maybe you're not holding rpm as long as you thought.

Burnouts are a relatively simple process and you seem to have something out of whack. It's a lot easier to figure things out when you can see them and hear them on video.