Search found 2194 matches

by SWAMPHUNTER45
Fri Dec 14, 2018 7:24 pm
Forum: Airboat Talk
Topic: Fuel Recommendations
Replies: 15
Views: 474

Re: Fuel Recommendations

Capt steve wrote:Ethonol will wick moisture from the ambiant atmosphere and lead to water in the fuel system as well as caustic to rubber and plastic.


The actual scientific term I am told is "Phase Separation." It is why I run a traditional marine spin on separator style filter.
by SWAMPHUNTER45
Fri Dec 14, 2018 3:07 pm
Forum: Airboat Talk
Topic: Fuel Recommendations
Replies: 15
Views: 474

Re: Fuel Recommendations

Something must be lost in translation. First is Pontoon has a Series 3 LC engine that is a pump gas engine. It should live a long life on fresh 93 octane fuel. As it relates to Aviation fuel in a Branch engine the builders guide line is 10% to 25% based on need. Need is driven by compression ratio, ...
by SWAMPHUNTER45
Wed Dec 12, 2018 10:02 pm
Forum: Airboat Talk
Topic: Fuel Recommendations
Replies: 15
Views: 474

Re: Fuel Recommendations

A properly timed Caddy with a good battery, cables and starter should spin over fairly easily. Adding more initial timing fires the engine sooner which sort of makes the engine have to fight itself because the spark is sent prematurely. That fires the fuel charge and the piston still needs to go to ...
by SWAMPHUNTER45
Sat Dec 08, 2018 5:46 am
Forum: Automotive Power Only
Topic: Noob engine choices, what makes a good motor
Replies: 5
Views: 388

Re: Noob engine choices, what makes a good motor

One easy way to determine if a power and prop combo will work is to search the threads and avatars. If someone on here is doing it well then it's worth considering.

The best value $ today are junk yard LS engines. They are cheap and the bottom ends are tuff.
by SWAMPHUNTER45
Mon Dec 03, 2018 3:58 pm
Forum: Airboat Talk
Topic: Flying eagle
Replies: 9
Views: 674

Re: Flying eagle

Rebel & Chicken a heavy FWC presence is becoming the norm up that way at large promoted events. There were 5-6 out the day of the Rodeo doing safety checks and patrolling into the night. Don't think they made any arrests so eventually the supervisors will probably pull back on it.
by SWAMPHUNTER45
Mon Dec 03, 2018 3:50 pm
Forum: Automotive Power Only
Topic: Will standard radiator hose work?
Replies: 12
Views: 328

Re: Will standard radiator hose work?

Hoses that have a exposed metal spring inside generally feed a suction side of the pump and were used to keep the hose from collapsing. I can't advise you if you could get away without one on the intake to the pump you would need to try. NAPA has some really nice HD hose in bulk that the big trucks ...
by SWAMPHUNTER45
Sun Dec 02, 2018 2:43 pm
Forum: Prop Talk
Topic: New boat , 2.68 ox box with 76" 3 blade r
Replies: 11
Views: 413

Re: New boat , 2.68 ox box with 76" 3 blade r

You may need to do both to get the desired result.

You could always add a blade!
by SWAMPHUNTER45
Sun Dec 02, 2018 2:32 pm
Forum: Airboat Talk
Topic: Flying eagle
Replies: 9
Views: 674

Re: Flying eagle

SWAMPFEST
by SWAMPHUNTER45
Sun Dec 02, 2018 7:45 am
Forum: Prop Talk
Topic: New boat , 2.68 ox box with 76" 3 blade r
Replies: 11
Views: 413

Re: New boat , 2.68 ox box with 76" 3 blade r

I agree with BigUn add about a 1/4 of a reference mark that should drop you a couple hundred rpm. If I understand your math correctly would going to a true 80 inch blade configuration not afford you a full inch of clearance to the prop? Not sure but that might equate to just a hub change. May want t...
by SWAMPHUNTER45
Sat Dec 01, 2018 8:19 pm
Forum: Airboat Talk
Topic: New Florida commercial operator regs.
Replies: 19
Views: 800

Re: New Florida commercial operator regs.

If my memory serves me correctly it is "sniper" who is a DOI airboat operations instructor.
by SWAMPHUNTER45
Sat Dec 01, 2018 7:55 am
Forum: Automotive Power Only
Topic: Ugh! Box dilemma! HELP!
Replies: 31
Views: 1418

Re: Ugh! Box dilemma! HELP!

Nearly every company making a gear drive for airboats has a excellent product in this day and age. I have heard people talk negative about Rotator saying they are "rock crushers," only to run one throwing incredible Stroker Cadillac torque and nitrous at it and mine is quiet as most with c...
by SWAMPHUNTER45
Fri Nov 30, 2018 7:19 am
Forum: Automotive Power Only
Topic: 408 Ford stroker build underway! Direct drive
Replies: 94
Views: 4507

Re: 408 Ford stroker build underway! Direct drive

Cool build, I would try a 72 Q (2) blade set at 3,000 static.

I wonder what the dyno would have showed with less duration in that cam ?
by SWAMPHUNTER45
Fri Nov 30, 2018 7:13 am
Forum: Automotive Power Only
Topic: Ugh! Box dilemma! HELP!
Replies: 31
Views: 1418

Re: Ugh! Box dilemma! HELP!

That is what I was thinking CMB, it would offer a bit more leverage with pitch if he wanted to use it. I like a 2.55 but it puts the engine to it's lower rpm range but being a standard stroke build may not be optimum. The decision to go 2.55 in my opinion would be made because of a lower cam duratio...
by SWAMPHUNTER45
Thu Nov 29, 2018 11:27 pm
Forum: Automotive Power Only
Topic: Ugh! Box dilemma! HELP!
Replies: 31
Views: 1418

Re: Ugh! Box dilemma! HELP!

What led you to the 2.55 choice over the 2.68 ratio ?
by SWAMPHUNTER45
Tue Nov 27, 2018 12:32 am
Forum: Automotive Power Only
Topic: Overheating new build
Replies: 1
Views: 104

Re: Overheating new build

If it was a raw water cooled I/O in it's original application the first thing I would do is pull the stat out and gut it,(or replace with a US made 165) then run the boat and see what you observe. Checking AFR and the cooling system is all good to do but my bet is a failing stat or corrosion. I don'...
by SWAMPHUNTER45
Sun Nov 25, 2018 6:51 am
Forum: Automotive Power Only
Topic: First airboat cooling question
Replies: 15
Views: 562

Re: First airboat cooling question

If you or the prior owner has recently had the cooling system open it could be burping itself. This is where trapped air finds its way to the elevated overflow and the coolant refills the system.
by SWAMPHUNTER45
Thu Nov 22, 2018 2:08 pm
Forum: Automotive Power Only
Topic: Ugh! Box dilemma! HELP!
Replies: 31
Views: 1418

Re: Ugh! Box dilemma! HELP!

2.68 drives are a very common ratio for SBC and LS. All the companies offer a 2.68 ratio. If considering Sensenich give Darrin a call he has a large data base with years of experience and can give solid advice on a specific combination. He may steer you to the 2.88 worth a call to discuss it with hi...
by SWAMPHUNTER45
Thu Nov 22, 2018 11:12 am
Forum: Automotive Power Only
Topic: Ugh! Box dilemma! HELP!
Replies: 31
Views: 1418

Re: Ugh! Box dilemma! HELP!

Stinger and Ox offer a 2.55

Good luck with the build and let us know how things turn out.
by SWAMPHUNTER45
Thu Nov 22, 2018 10:40 am
Forum: Automotive Power Only
Topic: Ugh! Box dilemma! HELP!
Replies: 31
Views: 1418

Re: Ugh! Box dilemma! HELP!

To important of a component to make a poor decision. You would regret not matching the engine and prop to the optimum ratio drive. In selecting the three components you first determine your engines operational range in rpm. You then select the prop and verify its operational range. You then work the...
by SWAMPHUNTER45
Thu Nov 22, 2018 9:58 am
Forum: Automotive Power Only
Topic: Ugh! Box dilemma! HELP!
Replies: 31
Views: 1418

Re: Ugh! Box dilemma! HELP!

2.55 or 2.68 would be my choice
by SWAMPHUNTER45
Thu Nov 22, 2018 9:03 am
Forum: Airboat Talk
Topic: Happy Thanksgiving Southern Airboat
Replies: 9
Views: 618

Re: Happy Thanksgiving Southern Airboat

Happy Thanksgiving !
by SWAMPHUNTER45
Wed Nov 21, 2018 11:25 am
Forum: Automotive Power Only
Topic: Cadillac 500, torque-prop
Replies: 11
Views: 1004

Re: Cadillac 500, torque-prop

Dan are you aware MTS and 500CID are gone? They changed MTS to 500CID after Marty's death. Recently 500CID was taken over by a fellow in Illinois who is a racer. He is the owner of CadillacHighPerformance.com and is doing LS and ground effects now also. Marty's brother is affiliated and they still h...
by SWAMPHUNTER45
Wed Nov 21, 2018 8:31 am
Forum: Automotive Power Only
Topic: Cadillac 500, torque-prop
Replies: 11
Views: 1004

Re: Cadillac 500, torque-prop

The 472/500 Cadillac platform owns it's place in airboat history. I don't ever see these powerhouses leaving the sport until the last crankshaft has been turned or bearings dry up. In fact that is one of the reasons Mr Branch has been teaching a few of us how to use other bearings in the platform. T...
by SWAMPHUNTER45
Tue Nov 20, 2018 6:54 pm
Forum: Airboat Tech
Topic: Back up fuel pump save
Replies: 10
Views: 1072

Re: Back up fuel pump save

We have both in the kit now but that little pump pre-rigged with fittings and alligator clips makes quick work of a field repair and fed that big 542 inch bastard all the way back to the cabin.

I would advise everyone carry a primer bulb, extra fuel hose and spare pump.

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