20X8 motor suggestions

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henryd2
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20X8 motor suggestions

Post by henryd2 »

Hello All,

I just bought a used 20X8 classic airboat hull with stainless cage. It has a bone stock 454 on it. I know that the boat will be severely underpowered. Any suggestions on what motor or power I need to turn 5 76" whirlwind 13" wide blades with a 2.68 belt box?

Thanks,

Henry
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scottyroll
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Re: 20X8 motor suggestions

Post by scottyroll »

Big block for sure. That 454 could be a great starting platform if you stuff some goodies in it to make 550+ pony's. Its all about the $$$. I think a lot of people are happy with the 502's as well.
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1999 14ft Alumitech deckover. ZZ502. 2.37 Stinger. 4 blade WW Falcon Prop
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Deano
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Re: 20X8 motor suggestions

Post by Deano »

Yup, a big block. The bigger the big block the better.

You're talking a lot of boat, and a lot of blade area.
The good thing is that ya got a lot of gear to go with it.

The bigger it is, the lower the RPMs to do what you need.
The lower the RPMs . . . the longer it will live grief free. :)
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Whitebear
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Re: 20X8 motor suggestions

Post by Whitebear »

Lots of folks love their Water Thunder and/or Felber big motors. If you can afford a custom motor they shouldn't be overlooked.
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Airboatcapt2
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Re: 20X8 motor suggestions

Post by Airboatcapt2 »

Buyer beware I would not recommend Felber! Pretty sure he is not building engines anymore anyway.
Faron Floyd
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Airboatcapt2
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Re: 20X8 motor suggestions

Post by Airboatcapt2 »

You want big power check out Mast Motorsports. We have them in boats from 14ft to 30Ft and have been super Happy!
Not to mention they are right here in Texas!
Faron Floyd
American Airboat Corp
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www.americanairboats.com
409-920-0716 Cell
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Whitebear
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Re: 20X8 motor suggestions

Post by Whitebear »

Too many people have had better than just good experiences with both those guys for them to be overlooked. AND there ain't a thing wrong with Mast Motorsports engines. Just two different catagories of engines. Oops and yes Location to you is part of the equation as well. :)
"The Constitution is not so the government can restrain the people, it is so the people can restrain the government." Patrick Henry
The government cannot give anything --
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hammertime
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Re: 20X8 motor suggestions

Post by hammertime »

PM Norris with Marshall Engines I have a 632 from Norris on a 8x16 gto. I am running a 4 blade superwide with a 2.68 belt drive. This has plenty of torque and hp. I had them install a fast fuel on it last summer and the fuel mileage is pretty good. Great people to deal with and the warranty is great also.
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Re: 20X8 motor suggestions

Post by OLD MAN JONES »

X's 2 on the Blue Print ,
I have one of theirs on a 16x8 and would highly recommend it, if you have the budget for it. The engines are "Purpose Built" to rigorous specs and run super smooth/reliable. The truth is, you cannot build one for what they sell theirs for and with a great warranty!
PM NORRIS for sure :salute:
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Re: 20X8 motor suggestions

Post by andyp »

I think a o290 would get the job done quite well lol
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Bruce
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Re: 20X8 motor suggestions

Post by Bruce »

pcm 550 horse sc ls motor or the version panther sells hard to go wrong with a NEW motor not a bunch of slapped together parts
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captain chad
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Re: 20X8 motor suggestions

Post by captain chad »

We run those super charged lsa engines from PCM at Midway Airboat Rides and so far the only problems that I see are in the super charger cooling pump. I think they are using a baitwell pump and they just wont hold up. 550 hp out of a small block is awesome. If you are thinking Felber I would do some research.
"you cant fix stupid"
DAISYCUTTER85
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Re: 20X8 motor suggestions

Post by DAISYCUTTER85 »

I just ordered a efi 540 MAS from GTO, I here that the blueprint engines are good as well.
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air-roberts
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Re: 20X8 motor suggestions

Post by air-roberts »

if you go big block @ min go with a 572 ci or 632 ci prefb, but someone does offer a s/b that puts out tons of h.p. and is a lot lighter
if you want any recommendations i'll be glad to help you just pm me. I don't like to get into the builder wars
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:)
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Re: 20X8 motor suggestions

Post by :) »

As much motor as u can get in the lightest package u can find it in.. that 632 sounds about right! Lol good luck and keep us informed that's gonna be interesting. .
14 ft Combee. 4 seater, BPE 383 sb chevy, 2.09 stinger, 3 blade ww stump puller.
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:)
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Re: 20X8 motor suggestions

Post by :) »

P :?:
14 ft Combee. 4 seater, BPE 383 sb chevy, 2.09 stinger, 3 blade ww stump puller.
"When the people fear their government, there is tyranny; when the government fears the people, there is liberty." Thomas Jefferson
warrior-p
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Re: 20X8 motor suggestions

Post by warrior-p »

contact fannman on the motor
18 x 8 TEXOMA AIRBOAT, ZZ540 engine, 2.38 BALLISTIC DRIVE and an 82" 4 blade Whirlwind Whispertip EX prop
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Airboatcapt2
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Re: 20X8 motor suggestions

Post by Airboatcapt2 »

OLD MAN JONES wrote:X's 2 on the Blue Print ,
I have one of theirs on a 16x8 and would highly recommend it, if you have the budget for it. The engines are "Purpose Built" to rigorous specs and run super smooth/reliable. The truth is, you cannot build one for what they sell theirs for and with a great warranty!
PM NORRIS for sure :salute:

What engine did you get and what warranty? I called Blue Print a couple weeks ago and was told they do not have any engine for the airboat line available yet. I was told they are only doing R&D at this point?
Faron Floyd
American Airboat Corp
Orange, Texas
www.americanairboats.com
409-920-0716 Cell
Airboatcapt2@aol.com
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