I've got one of the 14" Grizzly's with riser block and have no problems getting (to me) acceptable resaw results.
Added my own tall fence, make sure it was parallel to the blade and ran a test on cherry. Over the ~4" width, worst deviation was 0.008" after spending a few minutes messing with fence-to-blade parallelism. Pushpad and feather board refer to experimenting with a couple different methods of keeping the stock flat to the fence. Pushpad is easier.
Using el-cheapo 1/2" 3tpi blade also bought through Grizzly. Kept the feed rate slow and steady (and undoubtedly slower than one would with a higher HP and higher tension capable saw).
It does cut better after sharpening though. Below is trying for around 1/16" thickness.
Test on a >8" wide piece of cherry. Don't have measurements on the photo but I believe I was trying for 1/4".
Time was spent on the following items when setting up the saw and when resawing:
Wheels are coplanar, or at least reasonably so (yep, close enough that I didn't feel the need to get out shims)
Proper crown on tire
Reasonable tension, ignoring what the gauge on the saw says. I don't have a proper blade tension gauge. Went with the "does it deflect about 1/16" when poked with little finger" test. Also, instead of testing between the bearings/guides, I test on the other side, inside the blade guard as it comes back up from the lower wheel.
I have the blade so that the area just behind the gullet is riding on the crown. Most of the time a 1/2" blade but I do have a 3/16" that I use sometimes. My 1/2" is 3tpi, the 3/16" is 4tpi. Fewer teeth seem to work better for me, seldom cutting thin material so chatter & bounce not an issue.
Are the guides set properly top and bottom? Take off the table to set the lower guides. Easier to see what you are doing! Easy for a small table like this saw. Maybe not so much for one with a 150# table.
Guide set close but not touching. I use the dollar bill trick so that should put them in the 0.004" to 0.010" range.
Keep the guides and thrust bearings clean and moving freely.
When putting table back on, now's a good time to check table is reasonably perpendicular to blade.
Take a moment and check that my fence is parallel to blade.
Keep the blade sharp.
I don't seem to have fence drift issues.
PATIENCE with the saw, setup and feed rate.
Don't sweat the petty things and don't pet the sweaty things. -- G. Carlin