Search found 954 matches

by Slidin Gator
Sun Sep 20, 2020 10:01 am
Forum: Automotive Power Only
Topic: 6.5 Diesel In An Airboat?
Replies: 42
Views: 3918

Re: 6.5 Diesel In An Airboat?

Not my area of expertise, but I'll give it a try. This post seems to relate to your issue. You're going to need a big hull for the weight and a gearbox o help transfer harmonics too, in my opinion. The gto duramax boat had a lot of problems, most of which were caused by big hollow blades and a diese...
by Slidin Gator
Wed Sep 16, 2020 8:13 pm
Forum: Aircraft Power Only
Topic: Gso 480 operating temp
Replies: 11
Views: 377

Re: Gso 480 operating temp

12ft, That all sounds typical, #4 cylinder (middle Stbd side) got too hot and dropped an exhaust valve seat, with the shroud you are probably ahead of the game, but obviously some CHT sensors would be good. Lycoming specifies 400 F or less CHT (cylinder) temp for maximum life and 500 F max with redu...
by Slidin Gator
Tue Sep 15, 2020 7:13 pm
Forum: Aircraft Power Only
Topic: Gso 480 operating temp
Replies: 11
Views: 377

Re: Gso 480 operating temp

The oil temp gauge is an excellent way to measure oil temp, but pretty useless for measuring cylinder temps. Water cooled CM engines monitor water temperature, kinda hard to measure air temperature where it matters. Aviation engines are air cooled, not oil cooled, one needs to monitor cylinder temps...
by Slidin Gator
Tue Sep 15, 2020 6:28 pm
Forum: Airboat Tech
Topic: She’s done but needs tuning!
Replies: 13
Views: 1172

Re: She’s done but needs tuning!

Reposting direct for you Bamas.
by Slidin Gator
Sat Sep 12, 2020 5:56 pm
Forum: Airboat Talk
Topic: Maintaining Bolt Torque
Replies: 6
Views: 405

Re: Maintaining Bolt Torque

Your welcome Yeller. Not that it matters to you much more much but here's the skinny in case it helps someone select metal for a build. You didn't get many responses because most boats are built with beams and channels made to "Aluminum Association" standards, which have constant thickness flanges, ...
by Slidin Gator
Sat Sep 12, 2020 2:38 pm
Forum: Aircraft Power Only
Topic: Gso 480 operating temp
Replies: 11
Views: 377

Re: Gso 480 operating temp

180 is when the thermostat opens, 190-200 is perfect, trust the manual, they wrote it in 1950 and haven't had to change it. Dirt man is right, cylinder head temps are what you need to watch, particularly on a GSO.
by Slidin Gator
Sat Sep 12, 2020 2:35 pm
Forum: Airboat Talk
Topic: Maintaining Bolt Torque
Replies: 6
Views: 405

Re: Maintaining Bolt Torque

You need beveled I-beam washers to level out under the nut. Normally you drill the hole straight and put them under the I-beam flange, but they should work under the nut for the angle the holes are drilled at. https://external-content.duckduckgo.com/iu/?u=http%3A%2F%2Fecx.images-amazon.com%2Fimages%...
by Slidin Gator
Sat Sep 12, 2020 8:59 am
Forum: Aircraft Power Only
Topic: lycoming 200 wide deck
Replies: 45
Views: 1526

Re: lycoming 200 wide deck

:rebel: OK Sliden Gator i will cross that bridge when it comes .thank you for all the help sir. :rebel: Scotty, I'm just like a prison preacher here, once one of the CM inmates starts to see the light, I want to make sure they stay on the path to Aviation righteousness. I bet once ya'll get this sl...
by Slidin Gator
Fri Sep 11, 2020 8:35 pm
Forum: Aircraft Power Only
Topic: lycoming 200 wide deck
Replies: 45
Views: 1526

Re: lycoming 200 wide deck

Yep, you can push a 70 or 72, a little less top end, a little more low end with each step.
by Slidin Gator
Fri Sep 11, 2020 3:58 pm
Forum: Aircraft Power Only
Topic: lycoming 200 wide deck
Replies: 45
Views: 1526

Re: lycoming 200 wide deck

Scotty, The numbers are of no value, the engine has been modified from it's original build. For starters, all angle valve engines were fuel injected from the factory. To install the updraft carburetor, a previous owner replaced the oil pan with one from a straight valve. They also would have gutted ...
by Slidin Gator
Wed Sep 09, 2020 9:00 pm
Forum: Aircraft Power Only
Topic: lycoming 200 wide deck
Replies: 45
Views: 1526

Re: lycoming 200 wide deck

Here is the order list for my last gauge panel. https://southernairboat.com/wp/wp-content/uploads/rtMedia/users/2619/2020/09/Ghost-Gauges-821x800.jpg?1599698797 I already had a spare mechanical oil temp gauge that would work, so the color scheme was based on matching that. They offer 3 different cap...
by Slidin Gator
Fri Sep 04, 2020 8:57 pm
Forum: Airboat Talk
Topic: Help with first airboat
Replies: 13
Views: 640

Re: Help with first airboat

First off, thank you Bobby for following and commenting cause it seems pretty dead around here (or maybe it's cause I'm stupid enough to try what thousands before me wouldn't touch with a 10' pole.) It's best you wait for the good advice, otherwise you get us Lycoming boys throwing out guesses, hal...
by Slidin Gator
Wed Sep 02, 2020 7:11 pm
Forum: Aircraft Power Only
Topic: lycoming 200 wide deck
Replies: 45
Views: 1526

Re: lycoming 200 wide deck

would still like to see some pic of exactly how and where the prop end single mount works Scotty, As for the nose mount, when you get a chance, look at the bottom of the intake/oil pan. You should find some tapped holes somewhere. I "believe" that most folks buy some type of transmission mount and ...
by Slidin Gator
Tue Sep 01, 2020 7:36 pm
Forum: Automotive Power Only
Topic: BBC - Oil Cooler Location
Replies: 6
Views: 195

Re: BBC - Oil Cooler Location

Do your oil lines enter at the top or the bottom of the cooler? They should enter and leave out of the top so the cooler stays full of oil, not air. If they run to the bottom of the cooler, I can envision the issue described. I agree with Gladesman, you should have a cooler bypass thermostat system ...
by Slidin Gator
Mon Aug 31, 2020 9:36 pm
Forum: Aircraft Power Only
Topic: Chevy flex plates
Replies: 4
Views: 257

Re: Chevy flex plates

TedTerrible,

You're cornfusing me now for sure. Didn't you just put on a Pacemaker ignition system?
terrible ted wrote:
Thu Aug 20, 2020 9:39 pm
There any value to a pair of old mags just put on a pacemaker.
How are you triggering the timing? Are your targets tapped into the Flexplate?
by Slidin Gator
Thu Aug 27, 2020 8:32 pm
Forum: Aircraft Power Only
Topic: Mechanical fuel pump going bad?
Replies: 7
Views: 601

Re: Mechanical fuel pump going bad?

Looks like the problem was either the inlet screen on the fuel pump or the racor filter. Ran all night on Saturday and didn’t stumble once. :thumbleft: :thumbleft: :thumbleft: Most of the times when things don't seem right, I change the filter and all is good! I run an electric with a check valve b...
by Slidin Gator
Thu Aug 27, 2020 8:00 pm
Forum: Airboat Talk
Topic: New/Old Airboat Hull
Replies: 52
Views: 4344

Re: New/Old Airboat Hull

Figured I'd rope this conversation back to Rick's build thread. Yep, didn't notice the shrouds until now Jeff. Never had one, but I hear they keep them cylinders cooler...especially the middle ones. You run a shroud on your aircraft engine? Rick Rick I plan to have a larger shroud built for my AV540...
by Slidin Gator
Wed Aug 26, 2020 7:17 pm
Forum: Aircraft Power Only
Topic: lycoming 200 wide deck
Replies: 45
Views: 1526

Re: lycoming 200 wide deck

I double checked my stuff. The large bushing mounts are LORD Dynofocal. 7/16" diameter bolts seems to be standard, 4 of them are holding my IO-540 (angle valve) up. In my O-540 build thread I had to drill out the new mounts because the stand was built for 1/2" bolts. Not an issue for your new stand ...
by Slidin Gator
Wed Aug 26, 2020 6:29 pm
Forum: Aircraft Power Only
Topic: lycoming 200 wide deck
Replies: 45
Views: 1526

Re: lycoming 200 wide deck

Scotty, The pictures that Kwan posted are O-320 engines using the smaller Bushing mount ears (I forget what they are called?), they also are just using the bottom two engine mounts, plus a nose mount. Take a look at pages 2-3 of my build thread that covers installing the actual mounts. If this match...
by Slidin Gator
Wed Aug 26, 2020 10:29 am
Forum: Airboat Talk
Topic: 46 years ago...
Replies: 4
Views: 462

Re: 46 years ago...

Interesting history here for sure!

In 1974 the Parliament House hosted Drag Racers, just a few year later the Drag Queens took over.



Image
by Slidin Gator
Tue Aug 25, 2020 8:39 pm
Forum: Airboat Talk
Topic: New/Old Airboat Hull
Replies: 52
Views: 4344

Re: New/Old Airboat Hull

I had also forgot about all them damn honey-do's that don't get done when you're trying to get a boat built. Anybody got any advice for staying out of the dog house while you're building a boat? :D Why stay out? Air Condition the Dog House and move in until the work is done. :violent1: I hung up my...
by Slidin Gator
Tue Aug 25, 2020 6:46 pm
Forum: High Performance Talk
Topic: pro charged a/c boats
Replies: 12
Views: 772

Re: pro charged a/c boats

That prop setting is typical for a 540. You can make amazing power levels with a 540 cubic inch engine, the big journal crank engines in particular (That should be what you have??). But, to survive for longer than a short drag race, you have to deal with the heat. If you can keep cylinder temps in c...
by Slidin Gator
Tue Aug 25, 2020 6:22 pm
Forum: Aircraft Power Only
Topic: No spark on Bendix mags
Replies: 1
Views: 138

Re: No spark on Bendix mags

Not many of us running them dinosaurs. You should be able to spin them on the bench and get spark, check your wiring inside, it sounds like something that is grounded that shouldn't be, or something is not connected that should be.
by Slidin Gator
Tue Aug 25, 2020 6:20 pm
Forum: Aircraft Power Only
Topic: Side instrument panel
Replies: 8
Views: 335

Re: Side instrument panel

They will make whatever you want. Call em, they are good folk.
by Slidin Gator
Tue Aug 25, 2020 6:18 pm
Forum: Aircraft Power Only
Topic: lycoming 200 wide deck
Replies: 45
Views: 1526

Re: lycoming 200 wide deck

68 NGQ is what i run on my 200....best prop i ever bolted on it I'm with GMAC on this, the 68" NGQ is a great all around prop, you won't go wrong with that choice unless you are looking for maximum speed (Razor etc.) or maximum push (72" NGQ). That engine will push a 72" prop well for maximum groun...

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