The I Gauss definately does what it says. you will tell a defference between a weak and strong magnet on the track. I think that it is a good idea to check magnets especially after you get a motor hot, 175 and over. I just got my I gauss and it does a really good job. others also work but arent as user friendly in my opinion.
Its prolly just a different reading using a different checker. As long as you use the same checker to compare all your rotors the info is worth something.
Also... Low turn motors have much stronger magnets. On my checker Spec motors are around the 1300 area where as modifieds are almost 1700. And just to make you aware, a strong magnet in a spec motor is not always faster. There is a reason those magnets are weaker.
Blade: Andro Treiber H 79g AN
FH: Donic Bluefire M3 Max Blk
BH: Donic Bluefire M2 Max Red
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You generally can't compare numbers between brands because of where the magnet is on the rotor, and how it's positioned in relation to the piece in the unit that measures its magnetic field. Use it to compare your rotors of the same brand, though, to see which ones are the best, and which are fading.
In my experience, a strong rotor will run cool, have good power down low, and good top speed. You'll need to gear it appropriately, a stronger rotor will need more gear than a weak one.
A weak rotor generally won't have as much punch, will still be pretty fast on top, won't need as much gear, and will be prone to running hot.
I think these meters are a good tool to have an idea of where your rotors are at, and to weed out the bad ones, but I wouldn't bother using them to try and get a magical rotor. Leave that to the slow oval guys grasping at anything they can to get faster.
anyone try using one of these on novak ballistic rotors? I'm not sure if the ballistic rotors are the same as older novak motors, but the ballistic ones are too long. You can't set them all the way down on the meter.