noyzee

ran mine and im around 12-13% slip depending what calculator i used.
whats a good or great prop slip? and if mine isnt good what can i do to get it better?
ive had 4-5 different props on my boat and the one on there now seems to be the best. its a 24p b1 that i had pitch down to a 23 and it seems to handle good, gives good mid range and same top end as the labbed 24, and a stock 22. i run it around 4800 rpm

thanks noyzee

Griff

That slip# is fine on straight bottom V.

jeffswav

I like this one http://www.rbbi.com/folders/prop/propcalc.htm

noyzee

that one puts me at 15%

jeffswav

15% seems a little high, mine is at 9.8% What is the make, model, year of your boat? Do you have a stepped hull or strait v? Do you know how deep your drive is? Is your goal top speed or tubing and skiing?
I noticed you are running 4800 RPM. What engine do you have?

Griff

Slip does not make a lot of difference as long as the boat performs well and at the correct rpms.
More slip also puts less stress on the drive.

jeffswav

True, every boat is different.

A.O. Razor

Very true indeed. Found this from an old mail from Julie @ Throttle up, just for kicks. It's from when we dialed a friends 38 Lightning in a few years ago.

"If slip is at 16%. This is actually good or OK for a Fountain. Reggie Fountain delivers many of his boats to his clients with 16-18%. Fountain are the exception to the rule when it comes to slip. Sometimes when we get a boat at 16% - 17% slip and we bring the slip down to like 9-10% , we actually will loose speed. So, in the case of a Fountain I am not alarmed about 15-16%"

onesickpantera

iTrader: (1)

X2 - use slip as a tool only and don't get too hung up on it. A friend's Checkmate runs a Bravo and has much higher slip numbers when compared to a Hydro QIV. But the boat is faster and has better manners with the Bravo.

noyzee

its a 2003 checkmate 26 ZT it has a very small step/notch in the hull. like 1" and its not a curved step its just a little one, it has a small notched in the transom about5-6" and about 14" wide and 4-5 inch tall.
not sure on the drive hight.
single 496 mag

the boat doesnt seem to care about the prop. i have had so many props and nothing changes besides the rpm pretty much.

boat came with a 22p b1 and it would run 60 mph but with the boat light it would hit the rev lim and cruz speed 3600 rpm was about 40 mph

i put a b blades prop on it, he did a 26 with lab and cup and it would only turn 4400 ish but cruz speed was like 46 top speed was 58

he then sent stock 24, that went 4500-4600 and ran 59-60 with cruz aaround 43-44

then labbed it and put cup and the boat ran about the same but seemed to be very light in the bow and flighty

then tried a 23 3 blade the boat hated it, it blew the prop out bad, i could not trim it at all

then tried a hydromotive 25 pt qd4 and the boat handled unreal but would only run 4600-4700 but 56-57 mph

i then took the b blades labbed 24 and had a local place take some cup out and pitch it to a 23 and it seems to be the best so far. it runs 4700-4900 depending how the boat is loaded (coolers, fuel, people etc) it cruz at 43-45, handles good and tops out between 59-61 depending on the day. beginning of the year with me and one other light guy and 1/4 tank, no coolers, grills, floaties etc etc it ran 4900 @ just about 63 between 61-63

the boat seems not to care what prop is on it. lol