Where did you come up with that? I think you might be off a little/bunch.



2 tonchevy, As far as Merc putting Hi Polish on Chopper 2's.................there is a slightly long story I will shorten. You bought stock Chopper 2's. If you bought Labbed Chopper 2's, they would have been Satin finished. Scott (Merc Racing) decided to go Hi Polish on the stock OB cleavers and choppers because of the bling affect and production processes that I will not divulge.


Bostic, I said it is up to the customer how they want the finish. I didn't say there is no difference in performance. I believe/know there is a difference in performance. On average 1 mph or less can be seen but we have simply put our satin finish on out of the box props and have seen gains close to 2mph. Most of those results were on single engine OB boats but twin stern drives get results too.
Again, I've had this dicussion turned into a argument before. It's simply not worth the waste of time trying to talk somebody into it. That's why we let the customer decide. If they want our advice, it will always be satin race finish. Believe me, there is a trick to putting that finish on too. You need the correct equipment and a ton practice.


Brett

Mr. Anderson, Sorry to get your feather's ruffled.
I'm not trying to start an argument here..... just stating what our testing showed yrs. ago.
If someone (Mercury or you for that matter) tested it & said it was 1 mph faster, then that's good enough for me?
I'm not saying that the 1 or 2 mph gain is incorrect ..... all I stated was our results.... no change in RPM & no change in MPH..... Again, sorry if our results didn't match yours?
I'm sure we didn't know how to put a "special" satin finish on the prop in the first place, since everybody knows how to put a high polish on one. :cartman:

Again, Sorry for the Mis-Understanding,
Tim Bostic
Hoss Marine Props

Tim,

No harm done.

I am just stating our findings at BBLADES and Mercury Racing from much testing. You need to test these things more than once.

Thanks Brett

Yes, I agree about multiple testing.

Our actual test was done to determine whether polishing a prop increased performance & we determined it didn't help much at all, but decided that the "bling" factor was necessary for the customer, so we worked on making a beautiful prop along with the added performance of a custom prop.
(Like I said, my own props are satin finish - hehe!!!!)

Thanks,
Tim Bostic
Hoss Marine Props

ok thanks for clearing that up Brett!

so would a feasible course of action be: establish a baseline with my 28 "stock" chopper 2s and then try a lab finish if i need more rpm???

2tonchevy,
Testing the stock propeller first is the best way to determine what kind of lab finish would be needed.

Thanks Brett

Makes perfect sense. The adhesive forces of the water are greater than the waters cohesive forces. Water would rather stick to the spoon (prop) than stick to itself. Just like the concave meniscus in a glass or beaker of water. The water travels up the side of the glass. This would result as drag on the prop. The slight (patent pending) grinding/satin finish would break the slight adhesion of the water to the prop.

Cohesion: Water is attracted to water
Adhesion: Water is attracted to other substances