**** Prop Slip Calculator ****

MarkStein · **Posted:** February 9th, 2019, 10:19 pm

DoktorC wrote:

p man wrote:

Maybe some will disagree but....
Thinking about slip % is waaay over rated. It's not a simple thing as props have progressive pitch, are never accurate in their marked pitch and slip can change based on as little as which way you part your hair.

Best you can do is start with some good advise for a setup and test test test from there.
I'm often wrong though so.....

I think it's mostly used to call out BS speeds posted on the old interwebs..

The only number that really matters is the gps...like Pat mentioned the props may or may not be accurately marked, your tach isn't likely 100% accurate...so it's hard to compare slip numbers from one boat to the next or even prop to prop.

Once you've texted your props and setup and found your fastest combo then calculate you slip so you can sound smart when you're drinking beer with your buddies lol.

lol thanks

mattmak · **Joined:** June 5th, 2015, 8:56 am **Posts:** 516

Testing, and denial and error setup changes are the way to go.

But some folks like to geek out. Especially if you have a measured, or trusted pitch number..

Some people.. do neither! :shock:

DoktorC · **Posted:** February 12th, 2019, 11:28 am

mattmak wrote:

Testing, and denial and error setup changes are the way to go.

But some folks like to geek out. Especially if you have a measured, or trusted pitch number..

Some people.. do neither! :shock:

Most of my boating career has been denial and error lol.

Don't get me wrong..its a fun number for sure. It can help diagnose a setup issue once you have an established base line...like when I switched to my first 3.1 and lost mph because of a shitty nose cone (same props, same tach, same boat). It's just not something you can compare with someone else really because there's too many variables.

MarkStein · **Posted:** February 12th, 2019, 11:30 am

DoktorC wrote:

mattmak wrote:

Testing, and denial and error setup changes are the way to go.

But some folks like to geek out. Especially if you have a measured, or trusted pitch number..

Some people.. do neither! :shock:

Most of my boating career has been denial and error lol.

Don't get me wrong..its a fun number for sure. It can help diagnose a setup issue once you have an established base line...like when I switched to my first 3.1 and lost mph because of a shitty nose cone (same props, same tach, same boat). It's just not something you can compare with someone else really because there's too many variables.

Thats cool, just trying to learn as much as I can. Def not afraid to test either

DoktorC · **Posted:** February 12th, 2019, 11:37 am

MarkStein wrote:

DoktorC wrote:

mattmak wrote:

Testing, and denial and error setup changes are the way to go.

But some folks like to geek out. Especially if you have a measured, or trusted pitch number..

Some people.. do neither! :shock:

Most of my boating career has been denial and error lol.

Don't get me wrong..its a fun number for sure. It can help diagnose a setup issue once you have an established base line...like when I switched to my first 3.1 and lost mph because of a shitty nose cone (same props, same tach, same boat). It's just not something you can compare with someone else really because there's too many variables.

Thats cool, just trying to learn as much as I can. Def not afraid to test either

I also like to hear myself speak on the interwebs...so there's that too..

MarkStein · **Posted:** February 12th, 2019, 11:51 am

DoktorC wrote:

MarkStein wrote:

DoktorC wrote:

mattmak wrote:

Testing, and denial and error setup changes are the way to go.

But some folks like to geek out. Especially if you have a measured, or trusted pitch number..

Some people.. do neither! :shock:

Most of my boating career has been denial and error lol.

Don't get me wrong..its a fun number for sure. It can help diagnose a setup issue once you have an established base line...like when I switched to my first 3.1 and lost mph because of a shitty nose cone (same props, same tach, same boat). It's just not something you can compare with someone else really because there's too many variables.

Thats cool, just trying to learn as much as I can. Def not afraid to test either

I also like to hear myself speak on the interwebs...so there's that too..

lol

LittleCharger · **Joined:** April 1st, 2012, 12:29 am **Posts:** 1444

DoktorC wrote:

MarkStein wrote:

DoktorC wrote:

mattmak wrote:

Testing, and denial and error setup changes are the way to go.

But some folks like to geek out. Especially if you have a measured, or trusted pitch number..

Some people.. do neither! :shock:

Most of my boating career has been denial and error lol.

Don't get me wrong..its a fun number for sure. It can help diagnose a setup issue once you have an established base line...like when I switched to my first 3.1 and lost mph because of a shitty nose cone (same props, same tach, same boat). It's just not something you can compare with someone else really because there's too many variables.

Thats cool, just trying to learn as much as I can. Def not afraid to test either

I also like to hear myself speak on the interwebs...so there's that too..

When you only run your boat once a year it's tough to establish a base line LOL

mattmak · **Joined:** June 5th, 2015, 8:56 am **Posts:** 516

DoktorC wrote:

Most of my boating career has been denial and error lol.

Don't get me wrong..its a fun number for sure. It can help diagnose a setup issue once you have an established base line...like when I switched to my first 3.1 and lost mph because of a shitty nose cone (same props, same tach, same boat). It's just not something you can compare with someone else really because there's too many variables.

Rick, you know you can get an accurate tach that reads over 7000 for like $25..
In fact I heard LC's reads to 14,500rpm.

DoktorC · **Posted:** February 12th, 2019, 8:09 pm

mattmak wrote:

DoktorC wrote:

Most of my boating career has been denial and error lol.

Don't get me wrong..its a fun number for sure. It can help diagnose a setup issue once you have an established base line...like when I switched to my first 3.1 and lost mph because of a shitty nose cone (same props, same tach, same boat). It's just not something you can compare with someone else really because there's too many variables.

Rick, you know you can get an accurate tach that reads over 7000 for like $25..
In fact I heard LC's reads to 14,500rpm.

Yup...I have a digitron inductive tach. That doesn't mean that everyone else's is accurate though...or for that matter the $25 tiny tach may or may not be accurate....how do we know??? :mrgreen:

DoktorC · **Posted:** February 12th, 2019, 8:14 pm

LittleCharger wrote:

When you only run your boat once a year it's tough to establish a base line LOL

I do it for consistency...nothing changes...motor doesn't wear..etc.

Maybe you should come visit more often lol.

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