Search found 34 matches

by Swamp Thang
Sun Jun 18, 2017 10:57 pm
Forum: Airboat Talk
Topic: Jb hull with steel flex porpoising
Replies: 5
Views: 656

Re: Jb hull with steel flex porpoising

Hope that's it, let us know if that solves the problem.
by Swamp Thang
Fri Jun 16, 2017 9:00 pm
Forum: Airboat Talk
Topic: Jb hull with steel flex porpoising
Replies: 5
Views: 656

Re: Jb hull with steel flex porpoising

What condition was the old steelflex in? if it was in worn badly it could create a lot of drag, a fresh coat might free up the hull and allow it to porpoise but that is just a wild guess, things like this make you scratch your head sometimes. How big is the lip and how far is the trim tab mounted ab...
by Swamp Thang
Sun May 28, 2017 10:13 pm
Forum: Prop Talk
Topic: 4 blade vs 5 blade for heavy load
Replies: 15
Views: 999

Re: 4 blade vs 5 blade for heavy load

here u go i have about same boat 13'6 X 7'6 was runing a sbc gm crate motor 350/330hp with rotator gearbox 2.12 swinging a 3bld 79in whisper tip ex blds it did OK but once i threw my all steel bbc 414ci small cubed big blick oval port heads with a a 750dual feed holley mech secondary s.we got 500hp...
by Swamp Thang
Sun May 28, 2017 10:03 pm
Forum: Prop Talk
Topic: 4 blade vs 5 blade for heavy load
Replies: 15
Views: 999

Re: 4 blade vs 5 blade for heavy load

I am running a 2:68 gear box 4 supper wide Blades 80" prop 5200 600 hp @ 5200 496 chevy big block. Pitch set on 1 7/8 on a 8 by 16 Gto 2400 # boat Runs great will run ground with 4 to 5 people guns dog and decoys no problem. Heavy load deep water and into 20 mph wind 4300, Cruise light wind 41...
by Swamp Thang
Sun May 28, 2017 9:54 pm
Forum: Prop Talk
Topic: 4 blade vs 5 blade for heavy load
Replies: 15
Views: 999

Re: 4 blade vs 5 blade for heavy load

I've never put it on the dyno so I can't give definitive answers on torque and hp but it's right around 550hp. It has felber mild ported heads and his 496 cam in it. The 2.3 gear was a great all around gear. Put plenty of pitch in the prop and went where i wanted no issues. It was a narrow gear and...
by Swamp Thang
Sat May 27, 2017 12:21 am
Forum: Prop Talk
Topic: 4 blade vs 5 blade for heavy load
Replies: 15
Views: 999

Re: 4 blade vs 5 blade for heavy load

I have the same boat with A 700 horse big block and a 2.3 belt I went with the 84 inch three blade JX it turned out to be the perfect prop for my set up you should look into it also it's an awesome prop. it snaps up very quick pushes like a dozer and is reasonably priced money well spent. It can ha...
by Swamp Thang
Sat May 27, 2017 12:11 am
Forum: Prop Talk
Topic: 4 blade vs 5 blade for heavy load
Replies: 15
Views: 999

Re: 4 blade vs 5 blade for heavy load

I run the same boat with an all iron bbc. I have a 2.68,wish I'd have kept the 2.3 but. I have a 3 blade S and the boat does everything you could want. Mine is set up single front triple rear. Even with 650hp I don't think you could turn a 5 blade S with enough pitch to warrant the expence. 3 or 4 ...
by Swamp Thang
Sat May 27, 2017 12:04 am
Forum: Prop Talk
Topic: 4 blade vs 5 blade for heavy load
Replies: 15
Views: 999

Re: 4 blade vs 5 blade for heavy load

The 2.5 ratio will definitely help with the S blades. Get the 2.5 ratio and turn the motor 5100 to 5200. Also I would go with a 4 blade S instead of a 5 blade S. You aren't making enough HSP to turn a 5 blade. The S blades take a ton of HSP to turn. You're probably right, the 2.5 would get the most...
by Swamp Thang
Wed May 24, 2017 11:35 pm
Forum: Prop Talk
Topic: 4 blade vs 5 blade for heavy load
Replies: 15
Views: 999

Re: 4 blade vs 5 blade for heavy load

I'm thinking the S blades for the low rpm push, with the 2.3 I can only turn the engine about 4800 and lose probably 40 hp if it builds all it's hp at 5200 but still have all the torque. I might need to go with a 2.5 so I'm not leaving meat on the bone. I'd really like to keep the max rpm's around 5...
by Swamp Thang
Mon May 22, 2017 9:56 pm
Forum: Prop Talk
Topic: 4 blade vs 5 blade for heavy load
Replies: 15
Views: 999

4 blade vs 5 blade for heavy load

The 3 blade 79 inch R isn't going to be enough prop for my heavy 14x8 DB so I'm trying to decide if the 5 blade is worth the extra $$ or is it a waste? I'm getting ready to order the mild cam 632 which should be about 650 hp at 5200 and 800 ft lbs at 4,000 it will have a 2.3 belt drive. The whole ri...
by Swamp Thang
Thu May 18, 2017 9:28 pm
Forum: Airboat Talk
Topic: Everglades Patrol
Replies: 18
Views: 2107

Re: Everglades Patrol

AWESOME VIDEOS!!! Just think what could have become of the Everglades if it weren't for Great people like Mr. Shirley and all the other Real Gladesmem who spent their entire life trying to save and preserve it for future generations.
by Swamp Thang
Thu May 18, 2017 7:19 pm
Forum: Airboat Talk
Topic: First Airboat Help!!
Replies: 29
Views: 2046

Re: First Airboat Help!!

Just don't tell her how much it really cost and you'll be fine, what she don't know won't hurt her lol A 4 cylinder on a small light hull will run dry but 3 people is pushing it. Seems the general consensus around here is it takes about a 1 hp to 4 pound ratio to run dry with confidence assuming the...
by Swamp Thang
Fri May 12, 2017 9:22 pm
Forum: Airboat Talk
Topic: Black Monster
Replies: 21
Views: 2228

Re: Black Monster

I knew it wouldn't be long before someone was busting Kwan's balls on that one and I also would have laid odds CMB would be the first to do it LOL
Awesome video as usual Kwan!
by Swamp Thang
Mon May 01, 2017 11:43 pm
Forum: Airboat Talk
Topic: Props for smaller powerplants
Replies: 3
Views: 500

Re: Props for smaller powerplants

I think Arrow prop is who you are looking for, the prices are reasonable and nice quality. My first boat which was a 4 ft by 8 ft glass over plywood hull with a 16 hp single cylinder had a 42 inch 22 pitch 2 blade would do 22 mph in shallow water and I'm about 230lbs
by Swamp Thang
Mon Apr 24, 2017 10:49 pm
Forum: Airboat Sound
Topic: BBC Mufflers
Replies: 17
Views: 3612

Re: BBC Mufflers

I've been looking at stainless with 4 inch in and out but don't want a big bulky muffler, the Jones turbine mufflers that Swamphunter mentioned do seem to have a nice free flow design and look like a good value. they are about $70.00 each to your door on ebay, I'll probably try a pair soon. I think ...
by Swamp Thang
Sat Apr 08, 2017 9:44 pm
Forum: Florida Airboaters
Topic: New to Airboats in Tampa
Replies: 10
Views: 801

Re: New to Airboats in Tampa

If I had to choose one or the other it would probably be salt water but that's mainly because of my Snook fishing addiction, there's just nothing quite like a big Snook exploding on a top water plug right next to the mangroves. We here in Florida are very lucky to have the vast areas to ride both sa...
by Swamp Thang
Thu Apr 06, 2017 8:56 pm
Forum: Florida Airboaters
Topic: New to Airboats in Tampa
Replies: 10
Views: 801

Re: New to Airboats in Tampa

Welcome to SA, ride where ever there are no signs prohibiting air boats but remember to always be courteous. the average person doesn't like the noise very much but they have probably never been lucky enough to ride in one, once they do their outlook changes. Hernando county has strict rules, Citrus...
by Swamp Thang
Sun Mar 19, 2017 2:43 pm
Forum: Aircraft Power Only
Topic: 220 bogs and loses power at wide open throttle.
Replies: 26
Views: 1176

Re: 220 bogs and loses power at wide open throttle.

I had a very similar issue recently with my GPU, disconnected the fuel line between the electric pump and the mechanical pump to check the pressure coming out of the elec. pump and there was almost no pressure.... so off to the auto parts store I go with receipt in hand for a warranty exchange, get ...
by Swamp Thang
Wed Jan 11, 2017 11:30 pm
Forum: Airboat Tech
Topic: Light bars
Replies: 20
Views: 1663

Re: Light bars

just started installing the light bars on the Diamondback I'm putting together, mainly for gigging and bow fishing but a few facing straight forward as driving lights. The engine builder is putting two 140 amp alternators on it so even at an idle with all of them on there should be no issues running...
by Swamp Thang
Sun Jan 01, 2017 11:14 am
Forum: Airboat Talk
Topic: FREE Download Of Bob Stossel Documentary:Airboat Engineer
Replies: 5
Views: 768

Re: FREE Download Of Bob Stossel Documentary:Airboat Enginee

Awesome video, Thanks for posting it :D
by Swamp Thang
Tue Oct 11, 2016 10:15 pm
Forum: Airboat Talk
Topic: New to me CMB
Replies: 24
Views: 2223

Re: New to me CMB

I am the previous owner and I had a blue print 383 with a blower and didn't work out to well. Then I had an all forged 383 from whites and did very well considering the weight. The bb was a better engine for the boat but ls would do good to I'm sure. That belt is a 2.3 gear not a 2.1. good luck :th...
by Swamp Thang
Tue Oct 11, 2016 10:06 pm
Forum: Airboat Talk
Topic: New to me CMB
Replies: 24
Views: 2223

Re: New to me CMB

Steve it will be mostly a play toy in the Citrus swamp along with some backwater type flats fishing on the coast, most of the time there are two guys on the front deck/rake step along with a trolling motor so the weight of the BB would help balance the boat. too light in the stearn and they don't t...
by Swamp Thang
Tue Oct 11, 2016 10:03 pm
Forum: Airboat Talk
Topic: New to me CMB
Replies: 24
Views: 2223

Re: New to me CMB

welcome to the cm club and DB family, should be a great boat for my 10 cents I run a LS 550hp and up on it, great fuel ecomnomy and plenty hsp, ether way have fun and make sure the build is for a "airboat" engine not car hot rod will not live if not cam right and long runs above 3000 rpm....
by Swamp Thang
Mon Oct 10, 2016 11:29 pm
Forum: Airboat Talk
Topic: New to me CMB
Replies: 24
Views: 2223

Re: New to me CMB

http://www.southernairboat.com/photopost/data/508/medium/2_68.JPG This is my 14x8 DB iron head and block BBC 2.68 and 3 blade S. runs good,stable with 3 - 4 people,5 gets a lil harry. Nice ride Joe :thumbleft: Five is too many for sure on any 14 ft boat unless the side seating closer to the center ...
by Swamp Thang
Mon Oct 10, 2016 11:18 pm
Forum: Airboat Talk
Topic: New to me CMB
Replies: 24
Views: 2223

Re: New to me CMB

[quote="HuntingBigun"]welcome to the cm club and DB family, should be a great boat for my 10 cents I run a LS 550hp and up on it, great fuel ecomnomy and plenty hsp, ether way have fun and make sure the build is for a "airboat" engine not car hot rod will not live if not cam righ...

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