GSO 480 set up

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cctorgersen
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GSO 480 set up

Post by cctorgersen » Wed Feb 12, 2020 9:22 am

I have a Gso 480 with the AED specific carb,running around 13psi to it with 3/8s lines and a warp drive 8 blade prop. Here my question: is there anything else I need to run on this boat. We've actually blown up two engines so far, due to over reving (I think). Our tac broke and we punched it a few times and now have blown apart two crank cases. Its not like we are burning up cylinders at this point, its searing rod connecting bolts. with maybe 6 second burst at a time. not dogging it by any means but running hard for a bit.
The plan is to put more pitch in the warp drive, at this point I don't know the pitch in it currently. Just asking around for any other suggestions.

Thanks!

Dirtman
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Re: GSO 480 set up

Post by Dirtman » Wed Feb 12, 2020 11:16 pm

What diameter prop are you running and at what pitch. Really need to get an accurate tach on it. The higher the RPM of course the more boost there is no blow off valve like there would be on a turbo set up. If you can put a boost gauge on it to see how much boost you are getting that would also tell a lot. Just my 2 cents.
IO520 on a 12"6" Lazer with a 72" Q #20814
Build in progress: 14x7'9" JB w/ GSO540 &80" Razor

cctorgersen
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Re: GSO 480 set up

Post by cctorgersen » Thu Feb 13, 2020 6:01 am

its 68'' prop and I have to figure out the pitch but I guess what I'm wondering is that even if I get the RPMs under the recommended 3400, will this thing still make it if I'm running it up to 3200 RPM and not surpassing the recommended rates? or do I still have the chance of over boosting and blowing it up again?

SuprchgedPalmBeach
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Re: GSO 480 set up

Post by SuprchgedPalmBeach » Thu Feb 13, 2020 7:14 am

Oh my, that prop is seriously undersized for that motor. Also it needs a high volume of fuel, I use (2) fuel pumps running to each side of the carb separately using 1/2" fuel lines.
15' 6" Palm Beach Hull, GSO-480, 82" 3-Blade JX Series

cctorgersen
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Re: GSO 480 set up

Post by cctorgersen » Thu Feb 13, 2020 8:57 am

SuprchgedPalmBeach wrote:
Thu Feb 13, 2020 7:14 am
Oh my, that prop is seriously undersized for that motor. Also it needs a high volume of fuel, I use (2) fuel pumps running to each side of the carb separately using 1/2" fuel lines.

What RPM do you max out at? 3400? or less
And I'm making sure to run two fuel pumps with the next motor

SuprchgedPalmBeach
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Re: GSO 480 set up

Post by SuprchgedPalmBeach » Thu Feb 13, 2020 10:59 am

3600-3750, I use Carter 4600 Fuel Pumps. Crazy question but you do have a gearbox on your motor right?
15' 6" Palm Beach Hull, GSO-480, 82" 3-Blade JX Series

cctorgersen
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Re: GSO 480 set up

Post by cctorgersen » Thu Feb 13, 2020 11:05 am

SuprchgedPalmBeach wrote:
Thu Feb 13, 2020 10:59 am
3600-3750, I use Carter 4600 Fuel Pumps. Crazy question but you do have a gearbox on your motor right?
Yes its a Gear nose motor.

Project_FlightRisk
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Re: GSO 480 set up

Post by Project_FlightRisk » Thu Feb 13, 2020 2:12 pm

I am looking at building my first GSO 480 boat I talked to Darian at Sensenich about what prop to run and he said ether a three blade JR 82 or a JW 80. Can i get some feed back on ether one of these props?

SuprchgedPalmBeach
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Re: GSO 480 set up

Post by SuprchgedPalmBeach » Thu Feb 13, 2020 2:30 pm

I run a 3 Blade JX 82", I know some other guys running a 3 Blade 82" R. Both of these do the job.
15' 6" Palm Beach Hull, GSO-480, 82" 3-Blade JX Series

Project_FlightRisk
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Re: GSO 480 set up

Post by Project_FlightRisk » Thu Feb 13, 2020 2:35 pm

Im going to put it on 14 foot diamond back hull. I plan on running nitrous on it eventually what rpms would you suggest running the boat at?

SuprchgedPalmBeach
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Re: GSO 480 set up

Post by SuprchgedPalmBeach » Thu Feb 13, 2020 3:07 pm

Just my opinion but the last thing a GSO 480 needs is nitrous..but obviously I use my boat for a different purpose than what you intend to use it for. These motors are monsters if and only if they are set up correctly, Ex: correct fuel flow, cooling shroud, enough oil capacity, electronic Ignition, WOT RPM's.
15' 6" Palm Beach Hull, GSO-480, 82" 3-Blade JX Series

Project_FlightRisk
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Re: GSO 480 set up

Post by Project_FlightRisk » Thu Feb 13, 2020 3:17 pm

Im just going to use the boat as a fast ride boat. Right now Im going to run mags and next year put a pace maker on the motor. What type of oil do you run through your motor?

SuprchgedPalmBeach
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Re: GSO 480 set up

Post by SuprchgedPalmBeach » Thu Feb 13, 2020 4:03 pm

Phillips 66 Victory 50, 4 gallon custom sump. FYI if you use a custom sump it will have to be made with different layers & baffles to cut down on oil foaming. Foaming oil will destroy the motor.
15' 6" Palm Beach Hull, GSO-480, 82" 3-Blade JX Series

Project_FlightRisk
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Re: GSO 480 set up

Post by Project_FlightRisk » Thu Feb 13, 2020 4:23 pm

So you are running a dry sump system?

SuprchgedPalmBeach
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Re: GSO 480 set up

Post by SuprchgedPalmBeach » Thu Feb 13, 2020 5:57 pm

Yes, dry sump system. As far as I know there's not a GSO 480 with a wet sump.
15' 6" Palm Beach Hull, GSO-480, 82" 3-Blade JX Series

Project_FlightRisk
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Re: GSO 480 set up

Post by Project_FlightRisk » Fri Feb 14, 2020 8:43 am

How many gallons of fuel do you hold to ride all day?

SuprchgedPalmBeach
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Re: GSO 480 set up

Post by SuprchgedPalmBeach » Fri Feb 14, 2020 11:00 am

I have a 42 gallon tank, lasts about 3-4 hrs. hunting dry, I take 2, 15 gallon cans and hide them in the woods for extending hunting time. They like a lot of fuel and if you starve it or run it lean you will burn it up.
15' 6" Palm Beach Hull, GSO-480, 82" 3-Blade JX Series

cctorgersen
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Re: GSO 480 set up

Post by cctorgersen » Fri Feb 14, 2020 11:23 am

SuprchgedPalmBeach wrote:
Fri Feb 14, 2020 11:00 am
I have a 42 gallon tank, lasts about 3-4 hrs. hunting dry, I take 2, 15 gallon cans and hide them in the woods for extending hunting time. They like a lot of fuel and if you starve it or run it lean you will burn it up.
Have you ever run lean and busted a hole in your crank case?? or have you just lost cylinders. My boat is on a 13ft cut down outlaw poacher

Project_FlightRisk
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Re: GSO 480 set up

Post by Project_FlightRisk » Fri Feb 14, 2020 11:35 am

How hard are you running your boat to burn that much and how much of it is dry?

SuprchgedPalmBeach
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Re: GSO 480 set up

Post by SuprchgedPalmBeach » Fri Feb 14, 2020 2:38 pm

The only issue I've had with my 480 was the gearbox bushing wearing out. The trick is not to put a already worn out motor on your boat. Get a good motor and set it up right and you wont have issues like your speaking about.
15' 6" Palm Beach Hull, GSO-480, 82" 3-Blade JX Series

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