Search found 1837 matches

by flying fish
Tue May 01, 2018 5:49 pm
Forum: Airboat Talk
Topic: Prop question
Replies: 19
Views: 731

Re: Prop question

Hotdog

Possibly the hull tuning is a whole different topic and I would like to visit with you more about this new engine of yours.

PM me your phone # if you want. I would like to visit with you about your new engine. :-)
by flying fish
Tue May 01, 2018 5:17 pm
Forum: Airboat Talk
Topic: Prop question
Replies: 19
Views: 731

Re: Prop question

Hotdog
Is your engine builder familiar with airboats? Who is your engine builder?
by flying fish
Tue May 01, 2018 5:04 pm
Forum: Airboat Talk
Topic: Prop question
Replies: 19
Views: 731

Re: Prop question

Hotdog

Is your new engine an old school 434cid/23 degree SBC, carbureted and going on a ride boat?
by flying fish
Tue May 01, 2018 4:42 pm
Forum: Airboat Talk
Topic: Prop question
Replies: 19
Views: 731

Re: Prop question

Raising the rear of the engine should raise the nose of the boat.

Porpoising

Get you atleast a 4' straightedge and a bubble level. Start with the hull. Do it right.

If she were mine, the hull would be perfect before I thought about installing the new engine.
by flying fish
Tue May 01, 2018 3:59 pm
Forum: Airboat Talk
Topic: Prop question
Replies: 19
Views: 731

Re: Prop question

Hotdog Get a good tune on your hull and get your engine angle set correctly, she sure ought to scoot. Exhaust Gas Temperature is a killer. If you are running more than 400', sure might think about cooling with fuel. Chasing that last 6-8 horsepower is an engine killer on an airboat. Air fuel ratio a...
by flying fish
Tue May 01, 2018 11:08 am
Forum: Automotive Power Only
Topic: Mike Felber
Replies: 23
Views: 2010

Mike Felber

Mike I apoligize for what I said. I wish I could have a do over and take it back, but I cant. I was wrong. What I said was wrong. Someday I hope to look you in the eye and tell you I messed up and I truly feel bad about it. I appreciate your kindness, your vast engine knowledge and always taking the...
by flying fish
Tue May 01, 2018 10:56 am
Forum: Airboat Talk
Topic: Prop question
Replies: 19
Views: 731

Re: Prop question

Hotdog

If a 23 degree piece, (solid roller motor) and that 4" stroke stuffed in a standard deck height block, crankshaft bearings probably short lived. If you designed a 13 to 1 piece and if dynamically you are not sending your torque out the exhaust door, I expect you already know this. :-)
by flying fish
Tue May 01, 2018 9:43 am
Forum: Airboat Talk
Topic: Prop question
Replies: 19
Views: 731

Re: Prop question

Hotdog If you are talking 23 degree 434 and pump gas, yes, it is likely you can hold that motor to a chosen governed RPM with that prop. Try it, Set pitch to 3.5 and see what you got. One thing for sure, you got a lot of prop. Might even be an extremely nice setup depending on size and weight of boa...
by flying fish
Tue Feb 06, 2018 10:00 am
Forum: Automotive Power Only
Topic: Help with cam
Replies: 9
Views: 763

Re: Help with cam

1) Leave camshaft alone. If you need more push and like your prop, change gear reduction ratio. (2.67) Get more pitch in your prop. Govern engine 54-5600. 2) Leave camshaft alone. Try to borrow (2) blade 78" Falcon. Govern @ same given RPM. :-) 3) Leave camshaft alone with the 2 to 1 ratio. GM ...
by flying fish
Tue Aug 16, 2016 10:56 am
Forum: Automotive Power Only
Topic: CM Setup
Replies: 29
Views: 4650

Re: CM Setup

Diggin I wonder if you had a weak cylinder for quite some time on your LSA? With the new engine (hopefully new) may pull more pitch to same governed RPM? If so, cruise #'s may drop? One change at a time and new engine is that initial one change. Then, monitor results. JMO- Making a hull tuning sugge...
by flying fish
Fri Aug 05, 2016 2:44 pm
Forum: Automotive Power Only
Topic: CM Setup
Replies: 29
Views: 4650

Re: CM Setup

Diggin

I hear Tony's boat is tuned Phenominal. Some guy from North Central Kansas tells me this.

Maybe you could bump into Tony and he help you tune your hull & rigging. :)
by flying fish
Fri Aug 05, 2016 12:36 pm
Forum: Automotive Power Only
Topic: CM Setup
Replies: 29
Views: 4650

Re: CM Setup

3 blade 82" Maximus. Governed 5250 WOT with 2.3 ratio. JMO- Wait, didn't you already have this setup and got rid of it? Prop and gear suggestion coming from that same Dumbass from Kansas that tried to tell you how under-rated your 8.1 was in torque. Remember?? Amazing how that weak sister 8.1 ...
by flying fish
Wed Jul 06, 2016 10:08 pm
Forum: Automotive Power Only
Topic: loss of power 454 need advice
Replies: 51
Views: 3888

Re: loss of power 454 need advice

cranking cylinder pressure is low even @ 140#. Did you have the carb throttle plates open when cranking?

I would think on a direct drive piece 175# cranking cylinder pressure would be an absolute minimum. JMO-
by flying fish
Wed Jul 06, 2016 3:20 pm
Forum: Automotive Power Only
Topic: loss of power 454 need advice
Replies: 51
Views: 3888

Re: loss of power 454 need advice

:) oops. posted twice
by flying fish
Wed Jul 06, 2016 3:20 pm
Forum: Automotive Power Only
Topic: loss of power 454 need advice
Replies: 51
Views: 3888

Re: loss of power 454 need advice

Cam going flat
Back barrels not opening on carb
Fuel to squirters
Detonation

Good luck-
by flying fish
Wed Jun 08, 2016 4:18 pm
Forum: Airboat Tech
Topic: Airboat porpoising
Replies: 10
Views: 2381

Re: Airboat porpoising

The best way is to start at the beginning; then at least you know what you are working with. Jumping right to 'putting a belly in the hull' will only complicate matters and give you a heartburn. To radically oversimplify the scenario: First, the bottom of the hull should be straight and flat. . (Th...
by flying fish
Fri Mar 25, 2016 9:44 am
Forum: Automotive Power Only
Topic: Big Trouble Brewing?
Replies: 64
Views: 7295

Re: Big Trouble Brewing?

Diggin My paper work, oil fill cap and engine cover all suggest my PCM LSA uses 5/30 engine oil. It is my opinion that both the Marine Power and the PCM have the same internals. Exactly the same internals, different ECM's. A suggestion would be to put 5W30 engine oil back in your engine and a new se...
by flying fish
Fri Mar 25, 2016 8:06 am
Forum: Automotive Power Only
Topic: Big Trouble Brewing?
Replies: 64
Views: 7295

Re: Big Trouble Brewing?

Are you still broken?
by flying fish
Mon Mar 07, 2016 4:17 pm
Forum: Nebraska Airboaters
Topic: Boating is great down here in KS & OK
Replies: 6
Views: 2516

Re: Boating is great down here in KS & OK

Dam, I thought I missed something. Almost felt left out there for a minute. :)
by flying fish
Sat Feb 27, 2016 8:05 am
Forum: Automotive Power Only
Topic: Big Trouble Brewing?
Replies: 64
Views: 7295

Re: Big Trouble Brewing?

Looking at spark plug that is fouled, would suggest a new set of plugs. Vertical scoring in the cylinder is not uncommon. Exhaust port does not look like culprit cylinder is pumping oil. Noboby knows if you put a new plug in the engine and monitored burn for a short time. Possibly, she is perfect af...
by flying fish
Fri Feb 26, 2016 4:52 pm
Forum: Automotive Power Only
Topic: 502 crate motor recommended upgrades.
Replies: 39
Views: 3898

Re: 502 crate motor recommended upgrades.

A MAST 416 VVT will spank a 502/502 prop swung and burn less fuel doing it. JMO. :)
by flying fish
Thu Jan 28, 2016 7:58 am
Forum: Prop Talk
Topic: Prop change powershift to R series
Replies: 5
Views: 1443

Re: Prop change powershift to R series

I think it is possible to change your redrive ratio to a 2 to 1 ratio. Your current prop should be a real good fit for the 2 to 1 ratio.

You can contact Century Drive Systems for exact info on changing to a 2 to 1 ratio.
Century- 814-677-7100

IMO-Good idea to change ratio to 2 to 1
by flying fish
Thu Jan 07, 2016 8:23 am
Forum: Automotive Power Only
Topic: hp and torque
Replies: 7
Views: 1491

Re: hp and torque

15' deckover, GM 435hp 383, 2.09-1 stinger, 3 blade whisper tip, my question relates to HP and torque. the two meet at approx. 5200 rpm, then hp increases and torque starts to drop. If I set my prop to the max of 2500 prop rpms at WOT that puts me at 5250 engine rpms, would I gain anything by chang...
by flying fish
Fri Jan 01, 2016 11:10 am
Forum: Automotive Power Only
Topic: New ecotec concerns
Replies: 49
Views: 10034

Re: New ecotec concerns

John C
I like the bottom end push also. Ran a 3 blade 82" Sirius for a long time behind a 550 Mast.

Have been talking to Andrew about running a 3 blade 86" Sirius on my current boat. Waiting on a hub :)
by flying fish
Thu Dec 31, 2015 8:03 am
Forum: Automotive Power Only
Topic: New ecotec concerns
Replies: 49
Views: 10034

Re: New ecotec concerns

I'll try to get some pics posted in a few day if I can. But Chuck is right. Chuck put together a 4.3 direct injected 6 cyl ecotec for me. I didn't want to go with a turbo engine. So I decided to add 2 more cylinders instead and run a 6 cyl N/A motor. The motor is spinning an 80" 2 blade Maximu...

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