Polished vs. Satin Finish-My results...
 

I was the other "lab rat" for the polished vs. satin finish by Houston Propeller. I am very disappointed to say that I picked up less speed than Nick (bajadaze) ....just kidding.


The boat is a Formula 223, 454/425hp, Gils, Bravo1 and a Hydromotive 4blade. Both tests were performed with a full tank of gas (79 gallons),done in fresh water and pretty much identical conditions.... and yes it was the same Prop.

All speeds are gps

Polished
4000rpms-52.8 mph
5000rpms-65.7 mph
5200rpms-67.8 mph

Satin
4000rpms-53.3 mph
5000rpms-66.0 mph
5200rpms-68.3 mph


I am real happy with the results and can't thank Darin and Kim enough!!!
:D :D

Craig

So based on those results the satin prop actually hooked up slightly better to give you a little more at the same RPM. I would have thought the satin would not have hooked up as well, but would allow a slightly higher WOT RPM and maybe a little more speed. Is exactly 5200 the max RPM with both finishes?

Craig,
Thanks for your results. Nice to have double confirmation.
Did you gain any rpms at WOT?

I gained like 50rpms, leading to the speed increase of 0.7mph.

Looks like you got 0.5mph. We're pretty close. :) :cool:

I can't swear by it.:rolleyes: Between steering, throttling, trimming, and holding my gps... There may have been 50 to100 rpms difference. I actually got the WOT number by looking at the max speed recall page on the gps.

Craig

VetteVette, with a satin finish, you might be only 2 away from tripple digits ;) :D :)

EXCELLENT JOB CRAIG223
 

Thanks for providing us the excelllent testing results/we'll DONE:cool:

The satin finish is helping to collapse the bubbles that cross the propeller blade, thus improving "traction" Polished or waxed finishes only carry the bubbles which displace good hard water.