Search found 1915 matches

by digginfool
Wed Dec 23, 2020 10:37 am
Forum: Airboat Talk
Topic: Lets talk about harmonics
Replies: 20
Views: 1405

Re: Lets talk about harmonics

I've run 4 blade bowtie, 5 blade and 6 blade props on my SV540, getting ready to run a 2 blade. The bowtie I imagine is much like a 2 blade but you can definitely hear a thrumming sound with it, which I have to imagine is a harmonic of the trailing blades running in the wake of the leading blade. Th...
by digginfool
Mon Dec 21, 2020 4:56 pm
Forum: Airboat Talk
Topic: Airboat Won’t Start
Replies: 10
Views: 814

Re: Airboat Won’t Start

If it fires with ether, you're getting spark. I'd start by looking at your carb and it's not the first time I've heard about accelerator pump causing hard start issues.
by digginfool
Fri Dec 18, 2020 4:25 pm
Forum: Prop Talk
Topic: NGQ or .....
Replies: 8
Views: 565

Re: NGQ or .....

SV540, 10:1, 290 cam
by digginfool
Fri Dec 18, 2020 3:29 pm
Forum: Prop Talk
Topic: NGQ or .....
Replies: 8
Views: 565

NGQ or .....

My new to me 12' Thurman is in need of a better prop. I've run a 72" 5 blade RazorX and found that the combination doesn't work that well; engine had to run too hard to keep moving. Cage is an original Wayne Cone expanded metal on the sides, open on top. I believe it's the expanded metal since the R...
by digginfool
Thu Dec 17, 2020 5:22 pm
Forum: Automotive Power Only
Topic: Levitator
Replies: 10
Views: 1046

Re: Levitator

Just weighing in because my tag was brought up. The issue I had with my engine (which was Marine Power prepared, not Levitator but basically just the same; GM crate engine with proprietary electronics attached) started off as a bad coil, straight from the factory. The only thing I noticed is that th...
by digginfool
Fri Nov 06, 2020 7:41 am
Forum: Automotive Power Only
Topic: NEW boat build- weighing my options
Replies: 10
Views: 920

Re: NEW boat build- weighing my options

If you are handy with tools, there's always another route to take. There's a gentleman on here that goes by loudmouse. He uses a setup where he basically takes a 6.0 LS pullout, slaps two turbos on it along with the tune he's developed and goes. If he wears out the engine, no big deal; less than $2,...
by digginfool
Thu Nov 05, 2020 3:33 pm
Forum: Automotive Power Only
Topic: NEW boat build- weighing my options
Replies: 10
Views: 920

Re: NEW boat build- weighing my options

L&LLandServices welcome to SA! :salute: If I am spending your money, it's hard to beat a Watherthunder engine! "We have devolved a complete line of LS1, LS2, LS6, L92 and LS7 all aluminum Small Block Chevy's starting from 400 horsepower all they way up to 900 horsepower. These Engines range from 34...
by digginfool
Thu Nov 05, 2020 3:32 pm
Forum: Automotive Power Only
Topic: NEW boat build- weighing my options
Replies: 10
Views: 920

Re: NEW boat build- weighing my options

The power you can get from an LS is more than enough for a 14' boat. As far as hp/gear/prop, number one question is 'what are you going to do with the boat most of the time?' Sure, we all want that boat that will climb the Ridge fully loaded but is that practical for the couple times a year you need...
by digginfool
Sat Oct 24, 2020 9:32 am
Forum: Automotive Power Only
Topic: Diagnostic port on 6.2
Replies: 11
Views: 786

Re: Diagnostic port on 6.2

The software I use is called Diacom from Rinda Technologies. They have interfaces for almost every marine product out there (including PCM, Mercury, Marine Power, Seven Marine, and many others). Looking at their site, I see that the adapter used on Marine Power is the same used on PCM so the plugs ...
by digginfool
Fri Oct 23, 2020 11:47 am
Forum: Automotive Power Only
Topic: Diagnostic port on 6.2
Replies: 11
Views: 786

Re: Diagnostic port on 6.2

The software also allows you to do a number of different system tests, the most valuable of which is cylinder contribution test. You can also do test runs and record the results. This is useful because you can see trendlines developing; changes in oil pressure, fuel pressure, fuel consumption. In fa...
by digginfool
Fri Oct 23, 2020 11:37 am
Forum: Automotive Power Only
Topic: Diagnostic port on 6.2
Replies: 11
Views: 786

Re: Diagnostic port on 6.2

The software I use is called Diacom from Rinda Technologies. They have interfaces for almost every marine product out there (including PCM, Mercury, Marine Power, Seven Marine, and many others). Looking at their site, I see that the adapter used on Marine Power is the same used on PCM so the plugs a...
by digginfool
Fri Oct 23, 2020 8:09 am
Forum: Automotive Power Only
Topic: Diagnostic port on 6.2
Replies: 11
Views: 786

Re: Diagnostic port on 6.2

I can't say specifically for a Levitator but on the Marine Power version, the data port is at the front of the engine near the supercharger intake. It isn't an OBD II style plug; it's flat. You might look there.
by digginfool
Thu Oct 22, 2020 2:41 pm
Forum: Airboat Talk
Topic: Buttraxx
Replies: 0
Views: 917

Buttraxx

I just wanted to give the folks at Buttraxx a shout out. I emailed them on Monday because I had one of my rain slips blow off. Shortly after the email, I was called and I explained what happened. The lady I spoke to (Mich?) said she had my order in front of her and clarified that it was the slip for...
by digginfool
Sun Sep 27, 2020 9:04 pm
Forum: Prop Talk
Topic: Powering oil tanker with airprops (is it possible)?
Replies: 17
Views: 1145

Re: Powering oil tanker with airprops (is it possible)?

I’m no engineer, but I don’t think this is practical for many reasons. A few are: 1) yes it will be quieter underwater, but the noise to power a tanker with air props will be unbearably loud above water; 2) you will lose reverse, which ships need; 3) it is probably a lot more expensive in fuel sinc...
by digginfool
Sat Sep 05, 2020 5:35 pm
Forum: Airboat Talk
Topic: Artistic rudder wrap
Replies: 9
Views: 1181

Re: Artistic rudder wrap

Get with Painterchic. Tonya is a master. And, yes, the vinyl does very well on rudders. Hulls too.
by digginfool
Wed Aug 19, 2020 7:53 pm
Forum: High Performance Talk
Topic: pro charged a/c boats
Replies: 12
Views: 1592

Re: pro charged a/c boats

On a boat that size I have to say you are setting yourself up for a world of heartache. Can it be done? Sure. Will it last? Doubtful. And, you will spend a fortune in avgas keeping that beast fed. Keep in mind that with a supercharged air-cooled engine you have to throw a bunch of fuel at it to keep...
by digginfool
Sat Aug 01, 2020 8:15 am
Forum: Aircraft Power Only
Topic: Tsi0540
Replies: 13
Views: 1365

Re: Tsi0540

I am by no means an expert on aircraft engines but I am a pilot and have some knowledge that might be useful. Yes, the lower compression pistons are to accommodate boost from the turbochargers and help prevent detonation. However, most, if not all, turbocharged aircraft engines are set up as what is...
by digginfool
Wed Jul 22, 2020 3:48 pm
Forum: Aircraft Power Only
Topic: Gauge Package
Replies: 1
Views: 641

Gauge Package

Finally putting my Thurman together. My instrument cluster allows three gauges. One is going to be voltage, one for oil pressure but not sure what to do with the third spot. Oil temp or cylinder head temp? What would you recommend? Also, for oi pressure, electric or capillary tube? It's a SV 540.
by digginfool
Fri Jul 17, 2020 9:21 am
Forum: Airboat Talk
Topic: Greetings from minnesota
Replies: 5
Views: 1045

Re: Greetings from minnesota

I'm a Ford guy from way back but sometimes you have to go with the flow and in the airboat world, it's either aircraft or Chevy by a wide margin. That being said, if you must go with the 302, you can ditch the marine manifolds for headers; you won't need a water-jacketed exhaust. Also, what Gator sa...
by digginfool
Fri Jul 17, 2020 9:06 am
Forum: Airboat Tech
Topic: New AirRanger Set up ?
Replies: 23
Views: 2560

Re: New AirRanger Set up ?

Owning a heavy DB with the LSA, I think I can weigh in here. First, you are leaving lots of power on the table by choking that engine down to 4,900 RPM. Whether that engine is a Levitator or Marine Power setup, it can safely turn 5,600 - 5,700 RPM. I'm running a 2.55 gearbox with a 4 blade 81" NGR a...
by digginfool
Thu Jul 09, 2020 7:25 am
Forum: Prop Talk
Topic: WhirlWind Propellers Airboat Design Process
Replies: 5
Views: 1694

Re: WhirlWind Propellers Airboat Design Process

Does your analysis provide information on blade flex? If so, how closely do the analyses meet real world measurements? Just a dumb CE wondering out loud.
by digginfool
Thu Jun 18, 2020 11:32 am
Forum: Airboat Talk
Topic: Top Speed
Replies: 15
Views: 3404

Re: Top Speed

Oh boy. Here comes the pickle parade.
by digginfool
Wed Jun 17, 2020 10:59 am
Forum: Automotive Power Only
Topic: Need 500 piston
Replies: 46
Views: 5063

Re: Need 500 piston

Looks like we're both going to be ready to hit the Swimming Hole soon! I'm thinking the day after your next boil at Mack's!
by digginfool
Mon May 18, 2020 8:17 am
Forum: Automotive Power Only
Topic: Viscosity
Replies: 15
Views: 2439

Viscosity

Here's a question that I've thought about for a while and can't seem to find a solid answer anywhere. The fact that pretty much all of us live in Florida and a large portion lives in South Florida, is there any real reason to run a multi-vis oil? Wouldn't it make better sense to run a straight 30? E...
by digginfool
Fri May 01, 2020 8:07 am
Forum: Prop Talk
Topic: bulldozer prop.
Replies: 36
Views: 4469

Re: bulldozer prop.

So you say you can get 750 @ 5500 We will use that as a constant. At 2.0 that gives a theoretical mechanical advantage twice the input making 1500 At 2.55 that 750 leveraged by ratio can yield a theoretical 1912 When you get to building serious efficient engines and try to add in another 75hp the c...

Go to advanced search