383 RPMs

Airboat propeller discussion.
fowler
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383 RPMs

Postby fowler » Sun Sep 18, 2016 2:58 pm

Need Help. New Airboater. Bought an airboat only to burn up the engine due to running to lean. O.K. learn from your mistakes. Brand new 383 30 over, aprox 450 H.P. (right carb this time) 9 blade warp drive on 12 blade hub, 2,37:1 rotator gearbox, 14ft freedom craft hull, all aluminum rigging, 30 gallon tank. 2 grown men deep water aprox 30 MPH at 3300 RPMs, can hit 5500 RPMs with no problem. I just don't want to tear up the props due to running to many RPMs plus I don't want to run the engine that hard if not needed. And yes it will run the hill starting dead still around 4500 RPMs. My question is does this sound O.K. or do I need to look at changing something. Please give me some input. Thanks

SWAMPHUNTER45
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Re: 383 RPMs

Postby SWAMPHUNTER45 » Sun Sep 18, 2016 5:18 pm

ScottyRoll and DodoBird are great sources of 383 dope.

Me personally, I would go to a 3 blade prop and pull the rpm down a little.

fowler
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Re: 383 RPMs

Postby fowler » Sun Sep 18, 2016 7:23 pm

So I should stay with the warp drive and run a three blade configuration or change to a different prop style.

SWAMPHUNTER45
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Re: 383 RPMs

Postby SWAMPHUNTER45 » Sun Sep 18, 2016 8:53 pm

Do a little research on the 3 blade R set up it would probably be my choice or give Patti at Whirlwind, Andrew at WaterWalker a shout see what they think.

Measure your cage clearance you will need to know how much room you have to work with.

If you do a little searching of old threads there is a lot of discussion on this topic.

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406 JAMIE
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Re: 383 RPMs

Postby 406 JAMIE » Sun Sep 18, 2016 9:19 pm

SWAMPHUNTER45 wrote:ScottyRoll and DodoBird are great sources of 383 dope.

Me personally, I would go to a 3 blade prop and pull the rpm down a little.



X2 3bld whispertip ex 80in wide each bld will be 12in wide it will be like and day once u put it on ur boat.call ms.patty at whirlwind great people very helpful.

And that wrapdrive i had would not do nothing like the 3bld i went with whirlwind.i had a 6bld wrapdrive 80in wide was junk on the carmotor boat i had best thing i very did was going to 3bld.hope this helps besafe :rebel:
Melbourne Mud Mafia Down And Dirty

CarMotorBarge
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Re: 383 RPMs

Postby CarMotorBarge » Mon Sep 19, 2016 6:37 am

What is your primary use for the boat? Where do you do most of your running at?
14x7.5 Al David hull with 14 inch transom
419 CI Horsepower Barn LS3 with 2.68 Rotator soft drive swinging 4 blade 83.5" R
GTO Rigging and B&S Tilt Trailer
Member of Seminole Airboat Club

fowler
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Re: 383 RPMs

Postby fowler » Mon Sep 19, 2016 10:46 am

Run mostly back up in creeks looking for hold ups where the Big Reds are. However I need to run about 3 miles of river to get to the mouth of the creeks. some gigging out on the flats, but still have to run the river to get there.

CarMotorBarge
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Re: 383 RPMs

Postby CarMotorBarge » Mon Sep 19, 2016 11:04 am

The performance you mentioned above sounds reasonable. You could try putting more pitch in the prop and see if you like it. This will bring the RPMs down. Buying a 3 blade prop is an option, but a new one will cost about $3K. The warps are smoother, more durable, and have better top end speed. The 3 blade will be better in all other areas. Especially noise and push on the hill.
14x7.5 Al David hull with 14 inch transom
419 CI Horsepower Barn LS3 with 2.68 Rotator soft drive swinging 4 blade 83.5" R
GTO Rigging and B&S Tilt Trailer
Member of Seminole Airboat Club

fowler
Southern Airboat Member
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Re: 383 RPMs

Postby fowler » Mon Sep 19, 2016 6:14 pm

Big Thumbs up and High Five to Poorboy's Performance. GREAT PEOPLE. One phone call and a human being answered (imagine that). They were very helpful and informative. They explained just what I needed to do and how to do it, also what I could expect to see change. They did not try to sell me something. I made the changes they recommended and things are great. ***** JUST A NOTE. Been waiting a week for some one from GTO boats to call me back after three messages.

Krahammer
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Re: 383 RPMs

Postby Krahammer » Mon Sep 19, 2016 10:30 pm

GTO Manufactures great boats, but their customer service SUCKS. I have placed telephone calls and left messages, and have sent emails asking for information and never received a response. The only way I could ever get anyone to talk to me was by stopping at the facility. I ended up spending my money someplace else.

jeepinocala1111
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Re: 383 RPMs

Postby jeepinocala1111 » Tue Sep 20, 2016 6:51 am

GTO is a great company they are just stretched to thin on help, I am sure finding GOOD help is not easy these days.

Krahammer
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Re: 383 RPMs

Postby Krahammer » Tue Sep 20, 2016 9:22 am

I was persistent in trying to get GTO to get in touch with me. My calls and emails took place over two months. It goes deeper than the "help." BTW, I am a GTO owner.

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Re: 383 RPMs

Postby OLD MAN JONES » Thu Sep 22, 2016 8:57 pm

X's 1,000,000 on that poor customer service :slap:

As an owner of one of their finer 18' boats ever produced, I can say from experience... :banghead:
LIVING FOR THE FUTURE OF OUR EVERGLADES..
WWW.MACKSFISHCAMP.COM A traditional cultural Gladesman property.

fowler
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Re: 383 RPMs

Postby fowler » Fri Sep 23, 2016 6:07 pm

Well after a whole lot of learning, from the fine people at Poorboy's Performance I now have my 9 blade warp drive props pitched at 14/16/18 degrees. WOT 4800 RPMs 2 grown men in the boat will plain deep water 20 MPH at 2000 RPM / 30 MPH at 3000 RPM and 55 MPH at 4800 RPM don't know if it could be any better. The boat has plenty of push on the hill and now I'm not pushing the engine to 5500 RPM any more. hope this will let the engine live longer. Got questions call Poorboy's Performance GREAT PEOPLE.


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