I was just wondering if there is a big difference between speed coat or john deere slip plate. I have a can of dry moly lubricant "speed coat" that has molybenum disulfide?? made by advance aerosol but its just a spray can and I will need more for the bottom of my boat, I see that's the stuff that what rex sells has in it. the john deere stuff just says graphite dry film lubricant but I have heard that some people use it. I'm sure I should just get the real stuff but if there's not any difference than I can just go down the road and get it, what do you guys think?
thanks for the quick replies, sounds good! this way I can spray it this weekend, should I just spray over the 1200 grit wet sanding or should I sand it with something a little stronger? oh the bottom is imron.
Molybdenum disulfide is much more durable than graphite in the compound supplied by Lubribond A (speed coat). It's much more expensive as a result. It has a wide range of uses including inside engines and weaponry. Its used in greases, nylon, nylatron, and teflon just to name a few. It is not graphite.
Has anyone done any true testing with and without the speed coat??
I have heard that making the bottom excessively smooth creates a "sticky" bottom and actually causes more friction.
One example of this is the lower units on race boats, they are left with a "rough" finish to create aeration and therefore less grab in the water.
Can't say I have seen any true testing or proof, but it kinda makes sense.
Speed coat doesn't do anything. I'm sure I'll get beat up for saying it but I have never seen it demonstrated that it increases speed. The shape of the bottom of the boat is 99% of it, and the texture of the surface is the other 1%. The varying coefficient of friction of the surface finish at a given surface roughness is just not relevant.
I wonder if the U.S. Navy did research into this? I bet they did. I put graphite spray on my rideplate, speedcoat on the hull. Cheap enough, does it help?, I don't know. the ride plate seems to have bottom side wear and with graphite it is less noticeable.