Increasing pitch ?

cloumar

Petty Officer 1st Class
Joined
Aug 12, 2002
Messages
305
Hi folks,<br /><br />Am I right to say by increasing the pitch of a prop it will turn in better fuel economy and higher top speed ? <br /><br />Smokey ;)
 

roscoe

Supreme Mariner
Joined
Oct 30, 2002
Messages
21,763
Re: Increasing pitch ?

Not if it pushes the wot rpm down to where the engine is lugging and incurring excessive strain.<br /><br />It will give you better top end, to a point. After that, it starts to slow you down because the excessive load is slowing down the motor.
 

cloumar

Petty Officer 1st Class
Joined
Aug 12, 2002
Messages
305
Re: Increasing pitch ?

Thanks Roscoe,<br /><br />See now my engine is at its max. 5250 - RPM - WOT and the sugg. max is 5250 - so since the specs are 4750 - 5250 - I believe that I have some gap to play by going down a bit like may be 200-RPM<br /><br />Smokey
 

ED21

Master Chief Petty Officer
Joined
Aug 26, 2003
Messages
829
Re: Increasing pitch ?

It's usually recommended to keep rpm at the upper range. Sounds like you have it perfect.<br />Holeshot, if that's important, would probably be effected w/ more pitch.
 

cloumar

Petty Officer 1st Class
Joined
Aug 12, 2002
Messages
305
Re: Increasing pitch ?

Jus to get better fuel consumption and bit more top speed <br /><br />Smokey
 

cobra 3.0

Lieutenant Commander
Joined
Jul 31, 2003
Messages
1,797
Re: Increasing pitch ?

You could pitch up a couple of inches. Each inch more of pitch reduces your rpms by 200. You will have a slower take off, but a higher top end. Your cruising speed will go up some(around 2 mph)for the same rpm. However, if you load your boat up with extra gear and people, you will want your old prop on.
 

Dhadley

Supreme Mariner
Joined
Feb 4, 2001
Messages
16,978
Re: Increasing pitch ?

If your current set up is terrible it may be possible to get both. <br /><br />Tell us more about your rig starting with what motor you have.
 

cloumar

Petty Officer 1st Class
Joined
Aug 12, 2002
Messages
305
Re: Increasing pitch ?

Well guys, Thanks !<br /><br />You did answer to my question with enough details I should be able to make a choice.<br /><br />Smokey ;)
 
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