Search found 1943 matches

by SWAMPHUNTER45
Wed Feb 21, 2018 4:24 pm
Forum: Automotive Power Only
Topic: 502 power VS torque
Replies: 50
Views: 1106

Re: 502 power VS torque

Thanks Diggin
by SWAMPHUNTER45
Wed Feb 21, 2018 9:00 am
Forum: Automotive Power Only
Topic: 502 power VS torque
Replies: 50
Views: 1106

Re: 502 power VS torque

We are back to the same circle jerk on whether it is severe duty, percentage of power and HP vs Torque. The big or heavy boat guys see it one way the go fast or mini's see it another. Let's help this guy it's why I'm on SA. Glass half empty vs Glass half full Let's agree this fellow needs a big powe...
by SWAMPHUNTER45
Wed Feb 21, 2018 5:44 am
Forum: Automotive Power Only
Topic: Airboat Engine Builds - Automotive
Replies: 74
Views: 2370

Re: Airboat Engine Builds - Automotive

Wrong set up for him Mouse. He wants more speed and is also short a blade forcing him to over pitch. He is beating air and would be far better served running the old "R" or "NGR", demo a four blade he may see his speed increase adding the additional "S" blade but with h...
by SWAMPHUNTER45
Tue Feb 20, 2018 10:47 pm
Forum: Automotive Power Only
Topic: 502 power VS torque
Replies: 50
Views: 1106

Re: 502 power VS torque

Really only 3 blades to consider in my opinion!

21 ft boat is gonna need big push to have any chance on the ground.

Sensenich "S"
Water Walker Maximus
Whirlwind "SW"
by SWAMPHUNTER45
Tue Feb 20, 2018 10:37 pm
Forum: Automotive Power Only
Topic: Airboat Engine Builds - Automotive
Replies: 74
Views: 2370

Re: Airboat Engine Builds - Automotive

Pills Math

Where are the others spinning 4xS at honest 2 plus thru a 2.37...... SHOW ME
by SWAMPHUNTER45
Tue Feb 20, 2018 5:27 pm
Forum: Automotive Power Only
Topic: 502 power VS torque
Replies: 50
Views: 1106

Re: 502 power VS torque

You should focus on a big inch engine that is purpose built by a builder who has a reputation for reliability on an airboat platform. Don't buy in to a big horsepower number on a dyno but look for a balanced hp/torque curve that gives you big torque and big horsepower together. To buy an engine that...
by SWAMPHUNTER45
Sun Feb 18, 2018 9:38 pm
Forum: Airboat Talk
Topic: 454 starting problem
Replies: 4
Views: 237

Re: 454 starting problem

Does it try to crank ?
by SWAMPHUNTER45
Sun Feb 18, 2018 8:32 pm
Forum: Automotive Power Only
Topic: Airboat Engine Builds - Automotive
Replies: 74
Views: 2370

Re: Airboat Engine Builds - Automotive

As a general rule when in a strange place FOLLOW THE LOCALS who know where they are going :slap:

If something like this was gonna happen the Diggin Fool would be the first name to come to mind...lol
by SWAMPHUNTER45
Sun Feb 18, 2018 1:36 pm
Forum: Automotive Power Only
Topic: Airboat Engine Builds - Automotive
Replies: 74
Views: 2370

Re: Airboat Engine Builds - Automotive

Only 3 blades with a 2.68 ? Way over pitched for that blade Mouse. They perform really well at 1.75 to just shy of the 2.5 on mark, you get up to 2.5 and beyond and it's beating air my opinion. 2.0 mark at 1950 to 2,000 is a great place to be you can choke it back even more and it will still push li...
by SWAMPHUNTER45
Sun Feb 18, 2018 10:23 am
Forum: Automotive Power Only
Topic: Airboat Engine Builds - Automotive
Replies: 74
Views: 2370

Re: Airboat Engine Builds - Automotive

The funny thing is that the 542 Cadillac makes substantially more torque, but doesn't turn anymore prop. :stirpot: Any of the boats I have seen spinning the 4 x S combo with "pitch" in them were big hp with gear or MudPups Caddy. My old fishing boat whips them up in a instant with a 2.37 ...
by SWAMPHUNTER45
Sat Feb 17, 2018 10:03 pm
Forum: Automotive Power Only
Topic: Airboat Engine Builds - Automotive
Replies: 74
Views: 2370

Re: Airboat Engine Builds - Automotive

I didn't disrespect the "lil guy" it is just not my platform.
by SWAMPHUNTER45
Sat Feb 17, 2018 7:08 pm
Forum: Automotive Power Only
Topic: Airboat Engine Builds - Automotive
Replies: 74
Views: 2370

Re: Airboat Engine Builds - Automotive

:stirpot: Kwan really ?

Mr Twin Turbo LS show up to the ride with an Eco-Tech :shock:
by SWAMPHUNTER45
Sat Feb 17, 2018 6:12 am
Forum: Automotive Power Only
Topic: Airboat Engine Builds - Automotive
Replies: 74
Views: 2370

Re: Airboat Engine Builds - Automotive

Great comment Wild Bill!

If your running salt water they are really a plus. In my engines I have stainless. They are a little more difficult to set but last forever.

Thanks for pointing that detail out to help others. Sometimes it's a small detail that can be overlooked which causes problems.
by SWAMPHUNTER45
Fri Feb 16, 2018 7:52 am
Forum: Automotive Power Only
Topic: Airboat Engine Builds - Automotive
Replies: 74
Views: 2370

Re: Airboat Engine Builds - Automotive

Here is the difference CMB your talking about spinning 4 S blades with a LS, but I actually do it with the old 542 inch Cadillac! On my boat there is no need for hearing protection, the neighbors don't complain and the ride is relaxing. This engine was built to net fish not for max power, we idle up...
by SWAMPHUNTER45
Thu Feb 15, 2018 6:30 pm
Forum: Automotive Power Only
Topic: Airboat Engine Builds - Automotive
Replies: 74
Views: 2370

Re: Airboat Engine Builds - Automotive

Maybe Darrin can pull data to see how much horse power is required to spin that combo.

The next one will be a bunch more power but really all I care about is how it spins the prop.

The cool thing is it's so reliable and the power is nearly instant.
by SWAMPHUNTER45
Thu Feb 15, 2018 5:31 pm
Forum: Automotive Power Only
Topic: Airboat Engine Builds - Automotive
Replies: 74
Views: 2370

Re: Airboat Engine Builds - Automotive

As stated this engine had not been put on a dyno but that said Mr Branch has had a variety of builds over the years he has tested. Using comparative data he feels it would yield 650 to 680 foot pounds around 3850 to 4150 and stated it is likely to be higher. The 555 build will have a totally differe...
by SWAMPHUNTER45
Thu Feb 15, 2018 4:57 pm
Forum: Automotive Power Only
Topic: Airboat Engine Builds - Automotive
Replies: 74
Views: 2370

Re: Airboat Engine Builds - Automotive

Never put it on a dyno CMB It spins 4 Sensenich "S" blades 81.5 inches long pitched at a solid 2 mark via a 2.37 ratio drive We keep the rpm down low around 4,200 rpm It has a wet plate nitrous system 150 shot with the spray 4.500 rpm It idles like Aunt Mickeys old station wagon and has ze...
by SWAMPHUNTER45
Thu Feb 15, 2018 4:20 pm
Forum: Automotive Power Only
Topic: Airboat Engine Builds - Automotive
Replies: 74
Views: 2370

Re: Airboat Engine Builds - Automotive

On another note very few of you actually have seen just how much power a Branch roller Cadillac has and just how easy it can spin those 4 big S blades. Once you did you would know why I have not changed platforms. Kwan has seen it in the black cement mud and green sticky grass on a 95' day. In fact ...
by SWAMPHUNTER45
Thu Feb 15, 2018 9:58 am
Forum: Automotive Power Only
Topic: Airboat Engine Builds - Automotive
Replies: 74
Views: 2370

Re: Airboat Engine Builds - Automotive

My old 70's era high nickel alloy will be going long after the aluminum crumbles...lol CMB is WaterThunder not the master builder of the airboat LS technology? It was he who said, if your running a large boat (15ft threshold) or heavy load go with a big block. Maybe one day but for now we will keep ...
by SWAMPHUNTER45
Thu Feb 15, 2018 8:16 am
Forum: Automotive Power Only
Topic: Airboat Engine Builds - Automotive
Replies: 74
Views: 2370

Re: Airboat Engine Builds - Automotive

I think my original point was to qualify that an airboat engine experiences a "severe duty" application. Personally it's simple math to me. I would not dispute that some towing vehicles see severe duty use. There are some apples and oranges among this comparison as the airboat never experi...
by SWAMPHUNTER45
Wed Feb 14, 2018 2:57 pm
Forum: Automotive Power Only
Topic: Airboat Engine Builds - Automotive
Replies: 74
Views: 2370

Re: Airboat Engine Builds - Automotive

As a point of information MAST has not included airboat engines in their 2018 catalog!
by SWAMPHUNTER45
Wed Feb 14, 2018 2:28 pm
Forum: Automotive Power Only
Topic: Airboat Engine Builds - Automotive
Replies: 74
Views: 2370

Re: Airboat Engine Builds - Automotive

Mouse my reference to the roller cam upgrade was for the sbc at time of build. It used to be a few hundred more if ordering a BP crate.

But well worth the money !
by SWAMPHUNTER45
Wed Feb 14, 2018 9:47 am
Forum: Prop Talk
Topic: J Series Experience & Updates
Replies: 10
Views: 709

Re: J Series Experience & Updates

WES what are the degree ranges with that hub?

Is 20 pitched hard ?
by SWAMPHUNTER45
Wed Feb 14, 2018 9:24 am
Forum: Automotive Power Only
Topic: Airboat Engine Builds - Automotive
Replies: 74
Views: 2370

Re: Airboat Engine Builds - Automotive

Sounds as if there could be an opportunity for a person to establish a airboat ECM tune service.

I feel the LS3 platform should have forged pistons to bullet proof it. I think knock sensor failures that caused pistons to crack was why.

Mouse do you run a factory bottom end on your twin engine?
by SWAMPHUNTER45
Wed Feb 14, 2018 7:42 am
Forum: Automotive Power Only
Topic: Airboat Engine Builds - Automotive
Replies: 74
Views: 2370

Re: Airboat Engine Builds - Automotive

I understand what your saying CMB and the higher the percentage of throttle applied the higher the stress is relevant in any application. The engine operating at a percentage of power is a proper way to communicate it's load output. The thrust data really sort of validates my point as the blade pitc...

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