sensenich prop advice

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YELLOWHAMMER
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sensenich prop advice

Postby YELLOWHAMMER » Sun Jan 25, 2009 6:44 pm

need some advice thinking on buying a 4 blade r series sensenich prop an a 2.68 gear to put on a 14x8 standard hamant hull how do the new blades perform the motor is 800hp thanks johnny
Last edited by YELLOWHAMMER on Sun Jan 25, 2009 6:51 pm, edited 3 times in total.

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plumcrazy
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Re: sensenich prop

Postby plumcrazy » Sun Jan 25, 2009 6:47 pm

guess it would depend on your power plant 8)

shiggs
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Re: sensenich prop advice

Postby shiggs » Sun Jan 25, 2009 7:27 pm

With 800hp and a 2.68, you will probably need more blade much like the S-series. What kinda motor do you have?
Last edited by shiggs on Sun Jan 25, 2009 7:29 pm, edited 1 time in total.

flying fish
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Re: sensenich prop advice

Postby flying fish » Sun Jan 25, 2009 7:29 pm

May not be able to hold back 800HP with just 4 R blades.
15' DB - 6.2 LSA - 4 blade 82" R - 2.52 CH-4

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YELLOWHAMMER
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Re: sensenich prop advice

Postby YELLOWHAMMER » Sun Jan 25, 2009 7:33 pm

hadnt bought it yet but it a 621 ci beck racing engine it runs on pump gas 800 in torque

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bondsman
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Re: sensenich prop advice

Postby bondsman » Sun Jan 25, 2009 7:36 pm

the question is what power is your motor makeing at what rpm? cause if it doesnt devolop power in the right spot a 3 blade r may stop it.
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YELLOWHAMMER
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Re: sensenich prop advice

Postby YELLOWHAMMER » Sun Jan 25, 2009 7:44 pm

makes it at 5300

deuces wild
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Re: sensenich prop advice

Postby deuces wild » Sun Jan 25, 2009 8:23 pm

i saw another guy on here wanted to know about race boat hulls, you should try to go to the test and tune this sat and watch the different hulls and props. you can see them up close and ask?
SPEED THRILLS

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bondsman
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Re: sensenich prop advice

Postby bondsman » Sun Jan 25, 2009 8:36 pm

i went to there website holy cow 815tq @4800rpm and 800hp @5600.

i would say the longest diameter 4 blade r or a 5 blade you would need.


man $22,000 :shock: :shock: :shock: :shock: :shock: :shock: :shock: :shock:
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YELLOWHAMMER
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Re: sensenich prop advice

Postby YELLOWHAMMER » Sun Jan 25, 2009 9:12 pm

thanks guys for the good advice yeah i couldnt remember for sure where it made its torque

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JUNIOR480
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Re: sensenich prop advice

Postby JUNIOR480 » Sun Jan 25, 2009 10:16 pm

WE HAVE BOAT THAT MAKES A ROUND 900HP AND IT HAS A 2:68 WITH A 84 INCH 5 BLADE SENSENICH 14/8 DIAMOND BACK AND SHE RUNS GOOD..
HAULIN A$$ SINCE 78......

dantheairboatman
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Re: sensenich prop advice

Postby dantheairboatman » Sun Jan 25, 2009 10:24 pm

Just drop back to a 2.09 or a 2.38 with a82/ 84in R and let the tip speed eat with some pitch. That will hold it but not with the 2.68. jmo
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bondsman
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Re: sensenich prop advice

Postby bondsman » Mon Jan 26, 2009 8:29 am

dans advice is far more sound drop back on the box ratio that much power with a 2.68. you dont need the crutch of a high ratio.

and junior i read on another forum posted by charles your boat is verry much a power house.
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crowhater
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Re: sensenich prop advice

Postby crowhater » Mon Jan 26, 2009 11:31 am

I don't care if you run the longest 5 blade R they sell you will not have enough prop with that motor and a 2.68. You will either need a Superwide blade or a smaller reduction. I have run both the R and the S, the R spun like a pin wheel.
18x8 Alum, 496 BBC, 2.6 CH4, 4B 82" S-blades

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bondsman
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Re: sensenich prop advice

Postby bondsman » Mon Jan 26, 2009 11:48 am

thats strange junior480's boat he is talking about is spinning a 5 blade narrow sensenich@84inch with a 2.68 and has more developed power at the same given rpm.
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crowhater
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Re: sensenich prop advice

Postby crowhater » Mon Jan 26, 2009 11:54 am

What ever, have you run both the R and the S? I have run both of them on the same boat, on the same day and I can tell you the R blade had no chance of holding my motor. I could have turned the R sideways and still spun it out of the Hub. If you don't want to beleive me just call Felber and he will tell you if it is a good combo. The R blade is a great prop for a small block or a smaller reduction but a big motor with a big box needs a SUPERWIDE! Everyone is always going to know someone or have a friend who herd about a boat that shot fire at idle and could drag a trailer house over black mud up hill while running on two year old pump gas that had water in it.
18x8 Alum, 496 BBC, 2.6 CH4, 4B 82" S-blades

C1gator
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Re: sensenich prop advice

Postby C1gator » Mon Jan 26, 2009 12:07 pm

My boat would do that, but only with good gas in it. I use to use it as a tow boat to pull all the trailers back to camp c after the hurricanes.... :lol: :lol:

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bondsman
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Re: sensenich prop advice

Postby bondsman » Mon Jan 26, 2009 12:14 pm

dont get your panties wedged up to tight crow.we are all giving opinions and when something comes up that makes you scratch your head we ponder the answer.but if it gets you upset well i am sorry.i am just a humble florida country boy that try's to learn from others.next time we will just let you post the answer since you know the answer allready.all of us know things are bigger in texas,bigger motors,bigger props,bigger boats,bigger horse power numbers,bigger torque numbers. let me be the first to admit no ones motor and boat runs as good as yours.

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bondsman
If life looks hairy in front of you! Shave it and put a condom on.

C1gator
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Re: sensenich prop advice

Postby C1gator » Mon Jan 26, 2009 12:17 pm

Dam, I done got caught in the middle of a Texas/Florida shoot-out. Hold your fire boys I am getting out of the way.

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YELLOWHAMMER
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Re: sensenich prop advice

Postby YELLOWHAMMER » Mon Jan 26, 2009 12:18 pm

good to see everyone getting along with each other--but anyway i am thinking on the s blades just not real sure about what gear ratio to get :D :D :D

dantheairboatman
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Re: sensenich prop advice

Postby dantheairboatman » Mon Jan 26, 2009 2:54 pm

with the s i would go 2.55/2.68 depending on lenth.
Ox Box. Billet gear reductions and clutch systems
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YELLOWHAMMER
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Re: sensenich prop advice

Postby YELLOWHAMMER » Mon Jan 26, 2009 3:06 pm

thinking about 82in

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crowhater
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Re: sensenich prop advice

Postby crowhater » Mon Jan 26, 2009 3:18 pm

bondsman wrote:dont get your panties wedged up to tight crow.we are all giving opinions and when something comes up that makes you scratch your head we ponder the answer.but if it gets you upset well i am sorry.i am just a humble florida country boy that try's to learn from others.next time we will just let you post the answer since you know the answer allready.all of us know things are bigger in texas,bigger motors,bigger props,bigger boats,bigger horse power numbers,bigger torque numbers. let me be the first to admit no ones motor and boat runs as good as yours.

signed
your learned apprentice
bondsman



Who is giving opinions? I am stating facts. People ask for solid answers so that they can avoid wasting cash on combonations that don't work. If you know a guy who has a direct drive GM V-6 that spins an 8 blade 82" super wide set @ #4 I say cool deal, the guy is hard core and my hat is off to him. I was not trying to get in a pissing match with you, I was trying to answer this guys question so he would not throw away cash. A big motor with a 2.68 will not perform as well with an R blade as it will with an S blade. I have run both of these props with a 2.68 and the S blade did better period.
18x8 Alum, 496 BBC, 2.6 CH4, 4B 82" S-blades

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Re: sensenich prop advice

Postby Ruagatr » Mon Jan 26, 2009 3:39 pm

The "R" blade from Sensenich can be pitched at greater angles than the S blade, without loss of significant efficiency. The S can be pitched at the number 4 mark and work well--thats where I run my S. But as Felber, Sensenich, and others will tell you, the R loves more pitch and just keeps on building thrust. I think boat weight has a HUGE amount to do with this discussion. The boat the Junior540 discusses above, with an honest 890 horsepower from a 598CI Chevy, Turns the 5 blades 84" R very well. It hasnt been tried with the S blade yet, nor is anyone volunteering to loan blades out to do so. It is a lighter ride boat and prob weighs around 1500 pounds total. Its all about the Combo.

Maddog

Rich Andrews
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Re: sensenich prop advice

Postby Rich Andrews » Mon Jan 26, 2009 3:55 pm

I can't believe anyone from Texas(where everything is bigger) would even consider anything less then s blades..... :lol:
I'll have my Manatee burger medium please...just say NObama

14x8 deckover FELBER 397ci.. HP ???..just stay back!!

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