| Author |
Message |
|
bbb
MMT 1000 Club
Joined: Wed Sep 02, 2009 2:54 pm
Posts: 1554
Location: SW Georgia
|
 GDSD 35 3 Blade RPM's? I run a heavy 19ft boat and yesterday by myself, I was turning 3850. That's with some mods too. When I added a 125 pound passenger and another 100 pounds in gear, I was running 3750. Prop is new.
I can slap a brand new mudbuddy big blade(12.25x10) on the boat and be hitting the rev limiter of 4300 with either of those two loads above.
The GD prop is smaller in diameter, so your answer must be the pitch of the prop (12x12 i believe) and cup on the blades.
My hope is that when the GD prop wears down some, I'll still get good push and speed with it. I know when I lose a little off the BigBlade, my push and speed are poor.
_________________
19x54 Seminole Extreme with a 35hp CDI GDSD. Mikuni. Marsh Mellow. Heads. Cam.
|
| Sun Oct 30, 2011 2:32 pm |
|
|
|
Gigafowl
MMT Elite Member
Joined: Tue Jan 13, 2009 7:19 pm
Posts: 6441
Location: Trinity Bay - Texas
|
Re: GDSD 35 3 Blade RPM's? FTR - the GD 3 blade is 11" - GD calls it a 12 pitch - but I believe it is between 11 and 11.5
the GD 2 blade is a true 12" by 12 pitch made by Hopkins to GD specs....
Hopkins will sell you a custom pitch - but it will cost more money - but might be worth it....
A stock motor struggles to turn them on day one - but as they wear the speed and rpms climb
as they hit their optimums - until they finally begin to loose speed and rpms go up significantly
and they develop "prop lift" and want to pop out - especially the 3 blade after it is worn out...
_________________
Eat - Sleep - Hunt ! ! !
"It is good to have an end to journey toward; but
it is the journey that matters, in the end."
|
| Sun Oct 30, 2011 5:45 pm |
|
|
|
meterman3
MMT 1000 Club
Joined: Mon Dec 21, 2009 6:25 pm
Posts: 1407
|
Re: GDSD 35 3 Blade RPM's? Hopkins does not make gd props anymore
And I drive a pd and approve this message
_________________
driving a gd in ur lake
and i aprove this message
|
| Sun Oct 30, 2011 7:02 pm |
|
|
|
Gigafowl
MMT Elite Member
Joined: Tue Jan 13, 2009 7:19 pm
Posts: 6441
Location: Trinity Bay - Texas
|
Re: GDSD 35 3 Blade RPM's?
_________________
Eat - Sleep - Hunt ! ! !
"It is good to have an end to journey toward; but
it is the journey that matters, in the end."
|
| Sun Oct 30, 2011 8:19 pm |
|
|
|
bbb
MMT 1000 Club
Joined: Wed Sep 02, 2009 2:54 pm
Posts: 1554
Location: SW Georgia
|
Re: GDSD 35 3 Blade RPM's?
_________________
19x54 Seminole Extreme with a 35hp CDI GDSD. Mikuni. Marsh Mellow. Heads. Cam.
|
| Mon Oct 31, 2011 10:26 am |
|
|
|
Gigafowl
MMT Elite Member
Joined: Tue Jan 13, 2009 7:19 pm
Posts: 6441
Location: Trinity Bay - Texas
|
Re: GDSD 35 3 Blade RPM's? IF - you decide to bend them and many guys do especially if your
gonna run the 3 blade - go in small 1/8" or less increments and 1/4"
is about the most I would recommend....
Don't do it if you got a used 3 blade - used 3 blades have the most lift
of all - or a reworked 3 blade is even worse.... But only do it if you are
having trouble with a brand new 3 blade from GD....
FYI - the 2 blade has almost no lifting issues and throws a huge rooster
tail in comparison to the 3 blade - you may wanna consider staying with
the 2 blade....
_________________
Eat - Sleep - Hunt ! ! !
"It is good to have an end to journey toward; but
it is the journey that matters, in the end."
|
| Mon Oct 31, 2011 12:27 pm |
|
|
|
JIMMY W
MMT 1000 Club
Joined: Tue Jan 13, 2009 8:02 pm
Posts: 4534
Location: South Louisiana
|
Re: GDSD 35 3 Blade RPM's? This damn GatorTail throws a high ass rooster tail!
_________________
17/54 GT EXTREME Center Console, Huntdeck w/ GTR 35
Hoyt Mods and some other goodies
|
| Mon Oct 31, 2011 12:52 pm |
|
|
|
meterman3
MMT 1000 Club
Joined: Mon Dec 21, 2009 6:25 pm
Posts: 1407
|
Re: GDSD 35 3 Blade RPM's?
_________________
driving a gd in ur lake
and i aprove this message
|
| Mon Oct 31, 2011 7:21 pm |
|
|
|
bbb
MMT 1000 Club
Joined: Wed Sep 02, 2009 2:54 pm
Posts: 1554
Location: SW Georgia
|
GDSD 35 3 Blade RPM's?
_________________
19x54 Seminole Extreme with a 35hp CDI GDSD. Mikuni. Marsh Mellow. Heads. Cam.
|
| Mon Oct 31, 2011 8:05 pm |
|
|
|
Duck Slayer 27
MMT Pro Member
Joined: Fri Feb 04, 2011 4:17 pm
Posts: 65
Location: Bridge City, Tx
|
Re: GDSD 35 3 Blade RPM's? Do yalls GDSD's bog down when they get in thick hard mud? mine will only turn like 600-800 rpm's when it gets in thick mud and it pisses me off. that normal?
_________________
35GDSD Chasing 1656GD
|
| Wed Nov 02, 2011 9:25 pm |
|
|
|
wal1809
MMT Pro Member
Joined: Fri Feb 20, 2009 8:15 am
Posts: 411
|
Re: GDSD 35 3 Blade RPM's?
_________________
snakebreaker
|
| Thu Nov 10, 2011 7:46 am |
|
|
|
