Propeller for 2:1 Belted 383 stroker?

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FishinCoop101
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Propeller for 2:1 Belted 383 stroker?

Post by FishinCoop101 » Sun Feb 06, 2011 11:59 pm

Hey guys,

I ran across another boat that a friend of mine has and I have the oppertunity to buy this boat for 5K. The boat is an old Marshland Marine Hull 16' X 7' Built for TPWD. it has an old stock 350 onboard and a Ch3-2:1 belted reduction running a wooden paddle 78 LXL 46. I have driven the boat and the boat handles well. the boat is set up for 4 passengers with the opperator and a passenger in the rear. The boat is a little sluggish when in dry conditions and has trouble getting moving when dry. My question is...........If I was to put a stout 383 onboard and add a 3 blade prop. would this boat have more snap and be able to run dry better or should I just look for a diff size reduction to put on the 383? Also what type of prop would be best and if I stayed with the 2:1 should I stay around 76" X 3 blades or larger?

All Appriciated

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Quackcephus
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Re: Propeller for 2:1 Belted 383 stroker?

Post by Quackcephus » Mon Feb 07, 2011 7:55 am

That stroker oughta be a beast on that size hull... props... there's a lot of choices. I would call both Whirl Wind & Sensenich and see what advice they have. :dontknow:

http://www.whirlwindpropellers.com/airboat/index.html

http://www.sensenich.com/products/browse/12

shiggs here at the TX Forum on SA is a Sensnich dealer so ya might try him also. :wink:
:texas:

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Brotherbob
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Re: Propeller for 2:1 Belted 383 stroker?

Post by Brotherbob » Mon Feb 07, 2011 10:18 am

Paging Dr. Eugene Leadbetter to the white courtesy phone.....cuz'n Eugene can set you straight..
:lol:
BRAB41,TAA-220 ,Air Ranger 15x8 , SBC , 78 " 3 blade WW prop, 2.88 Stinger
SHO-NUF!

ercalabria
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Re: Propeller for 2:1 Belted 383 stroker?

Post by ercalabria » Mon Feb 07, 2011 12:27 pm

Brotherbob wrote:Paging Dr. Eugene Leadbetter to the white courtesy phone.....cuz'n Eugene can set you straight..
:lol:
This be Nugene Ledbetter from Amit , County.
I always like the 2 blade 78 or 80 inch for more snap and so far the Whirlwind stump puller seems to do the best for me and they have the nickel edge which is harder than the stainless.
For more speed and more quite the 3 blade will do better.
This is with the 2 to 1 belt drive and up to about 450 hp..

Whirlwind , Sesenich, or the old powershift all have good products.
Remember, what Jerry Clower said bout Nugene, he would climb a tree to tell you a lie as soon as stand flat footed on the ground and tell the truth.
BRAB 10 / TAA 212
16x8 OLE BLUE PANTHER- 502/450 /2-1 CH3 / Powershift

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Re: Propeller for 2:1 Belted 383 stroker?

Post by hotrodcaptain » Mon Feb 07, 2011 1:34 pm

FishinCoop101 wrote:Hey guys,

I ran across another boat that a friend of mine has and I have the oppertunity to buy this boat for 5K. The boat is an old Marshland Marine Hull 16' X 7' Built for TPWD. it has an old stock 350 onboard and a Ch3-2:1 belted reduction running a wooden paddle 78 LXL 46. I have driven the boat and the boat handles well. the boat is set up for 4 passengers with the opperator and a passenger in the rear. The boat is a little sluggish when in dry conditions and has trouble getting moving when dry. My question is...........If I was to put a stout 383 onboard and add a 3 blade prop. would this boat have more snap and be able to run dry better or should I just look for a diff size reduction to put on the 383? Also what type of prop would be best and if I stayed with the 2:1 should I stay around 76" X 3 blades or larger?

All Appriciated
If you change reductions and put a bigger prop, that boat will come alive, im running a stroked out small block, with a 5 blade prop, just depends on what you want out of it i guess, riverrunner or a groundpounder????????????????
15x8 Alumitech, SBC, 3.12 Stinger and 5 Blade 84" Superwide; TAA430

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coldairman
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Re: Propeller for 2:1 Belted 383 stroker?

Post by coldairman » Mon Feb 07, 2011 3:17 pm

Fishin, I run same size boat w/ 383 2-1 belt and Sensnich 78 lxl 50. spinning motor 5100 prop 2550. Runs pretty strong but I have buddies with 383 2.68-1 and 3 blade R that are a little stronger on dry of course that will come with a pretty hefty pricetag. I have a spare 78 lxl 50 prop you are welcome to try if you would like just give me a call. 713-248 7557. Randy

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Re: Propeller for 2:1 Belted 383 stroker?

Post by RiseAboveIt » Mon Feb 07, 2011 4:42 pm

If you want to run the three blade, I think you'll need more reduction or one hell of a 383. 500 plus hp one... JMO

Stay with a two blade. Go with a 78" 2 blade R. Save your money...

If you had a 2.37 or 2.5.. Id say three blades all day.
No matter what happens... Just Rise Above It.

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Mitch James
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Re: Propeller for 2:1 Belted 383 stroker?

Post by Mitch James » Mon Feb 07, 2011 6:53 pm

I have seen two 383 stroker boats with less than 500 h.p and ran 3 blade props and 2:1 reductions these boats ran awesome the ultimate set up if you ask me.
2002 16X8 Airranger Rhino hull 502/502 2:1 belt with 3 blade WW Maximus prop

FishinCoop101
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Re: Propeller for 2:1 Belted 383 stroker?

Post by FishinCoop101 » Mon Feb 07, 2011 9:55 pm

What kind of propellers were those two boats running?

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Re: Propeller for 2:1 Belted 383 stroker?

Post by 21DiamondB » Mon Feb 07, 2011 10:56 pm

In my opinion you need a 78" 3-blade Sensenich R blade or a 78" 3-blade Whirlwind Stump Puller. If you go with a 2-blade I would go with an 80" prop if you've got the room in your prop guard. Cheapest way is going to be the two blade on up to the 3-blade Sensenich. Some companies like Whirlwind will let you try out the props and decide which one you like. Not sure if thats standard policy for them but Ive done it. I had a 78" 3-blade Stump Puller on a stock LS 350 motor and it did just fine. Hope this helps. I'm assuming the 383 you are talking about is about 425hp?
-------- 16.5 x 8 Diamondback - 632ci - Oxbox 2. 55 - Sensenich 5-Blade JX---------

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Re: Propeller for 2:1 Belted 383 stroker?

Post by cntry141iq » Mon Feb 07, 2011 11:14 pm

the whispertp is comparable to the R blade ... the stump puller is smaller width and totally different designed airfoil .. but the R or the whispertp is gonna be a load for a 383 with a 2 to 1 reduction I am not sure the R comes in left hand rotation ...
Don't waste your time ... it is the only thing you can't get more of
.. if it accidentally looks like I gave advice please ignore it .. and notify me immediately

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Re: Propeller for 2:1 Belted 383 stroker?

Post by 21DiamondB » Mon Feb 07, 2011 11:55 pm

I forget about the whisper tip. I guess because I jumped on the Sensenich Bandwagon before I gave it a shot. I had a 425hp 454 with a 2:1 that was spinning a 78" Stump Puller and it did a great job. Wouldn't be my choice of prop these days, but it ran great.
-------- 16.5 x 8 Diamondback - 632ci - Oxbox 2. 55 - Sensenich 5-Blade JX---------

shiggs
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Re: Propeller for 2:1 Belted 383 stroker?

Post by shiggs » Wed Feb 09, 2011 7:56 pm

FishinCoop101 wrote:Hey guys,

I ran across another boat that a friend of mine has and I have the oppertunity to buy this boat for 5K. The boat is an old Marshland Marine Hull 16' X 7' Built for TPWD. it has an old stock 350 onboard and a Ch3-2:1 belted reduction running a wooden paddle 78 LXL 46. I have driven the boat and the boat handles well. the boat is set up for 4 passengers with the opperator and a passenger in the rear. The boat is a little sluggish when in dry conditions and has trouble getting moving when dry. My question is...........If I was to put a stout 383 onboard and add a 3 blade prop. would this boat have more snap and be able to run dry better or should I just look for a diff size reduction to put on the 383? Also what type of prop would be best and if I stayed with the 2:1 should I stay around 76" X 3 blades or larger?

All Appriciated
I will try to give you my take on each one of your questions.

1. Will putting a stout 383 onboard and changing props help with more snap and dry abilities? Yes--Any addition in power will add to the performance characteristics in addition to what you are currently seeing. To borrow a phrase from Felber during one of our conversations on blades/ratios/motors/etc. Power makes Thrust! Of Course this statement is considering that your combinations are somewhat in order and you are not comparing to some goofed up combo that is completely out of whack. i.e. comparison with smaller power engine setup properly to a larger power engine setup completely wrong not allowing the engine to make its power.

2. Should you look for a different reduction to couple to the stout 383? Depends on how much $ you want to spend. It has been proven by many tests that a different reduction with the right prop can make more thrust.

3. What prop would be best staying with the 2-1 reduction? I am not familiar with all the Whirlwind applications, but I have seen 3-blade stump pullers coupled to 350s with 2-1 similar to what 21DiamondB was describing. Taking for granted that these guys did not have their rigs overpropped, then by default a stout 383 would spin it. On the Sensenich side the R-blade would be a considerable load--A "really" stout 383 might spin a smaller dia. 3-blade with a 2-1. Currently not knowing how stout your 383 would be, I would recommend a 2-blade R with a diameter as large as you can fit. To give you an idea an 80" 2-blade R set on pitch mark 2 is about the resistance of a 78x56. They do make the R-blades in left hand rotation. You could swing a 3-blade larger diameter H fairly easy, but it would not really be the ideal prop for what you are describing above. The H will push, but you need to spin them. The 2-1 will put them in the range they will push at if you put your foot in it, but I think with bigger loads you would be happier with the R for better all around performance.

Hope that helps you some.

sh

FishinCoop101
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Re: Propeller for 2:1 Belted 383 stroker?

Post by FishinCoop101 » Wed Feb 09, 2011 11:24 pm

Shiggs,

I appriciate you taking the time to explain......Thanks Again

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Re: Propeller for 2:1 Belted 383 stroker?

Post by rost495 » Thu Feb 10, 2011 3:06 pm

I'm at 450 or so with a 3 blade stump puller... 16x8 but a bbc....

anyway I am good BUT want better like everyone....

Anyway IIRC there is data that the stumpuller needs to run around 2800 and my 2/1 at 5000... just doesn't get it there.... if you spin the sbc faster with a 2/1 I think you could be fine... but in the meantime i've read some things that indicate why I'm not totally happy with the dry ground push of mine, is that the blades never get past 2400 or so generally... I can not swing a lot of pitch either.... 3 blade 78.....

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Mitch James
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Re: Propeller for 2:1 Belted 383 stroker?

Post by Mitch James » Thu Feb 10, 2011 7:46 pm

fishincoop101 one was a whirlwind stump puller i believe not sure of the other.
2002 16X8 Airranger Rhino hull 502/502 2:1 belt with 3 blade WW Maximus prop

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