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Big Block Talk! Everything about swapping a big block engine into your cart!



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Old 10-29-2014, 08:59 AM   #1
Downeydirt86
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Default what do i need to do to my cart to climb a sand hill

Hi have a lifted yamaha G1 golf cart with a G2 rear end, and i am dropping in a honda 24hp v twin possibly unless someone recomends another engine i can get that isnt to pricey. i already have the honda 24 with a comet clutch ready to go but can use it in another cart if i dont put it in this one. I would like to be able to climb a sand hill in a ohv area in California here called (blow sand hill) in ocotillo wells ca. what do i need to do to the cart to make it climb a sand hill. right now with the 420cc engine it currently has my one wheel will just spin in the slightest bit of sand i get stuck in. is there a rear end i can put that has positraction so i at least get two wheels to spin. I can weld whatever need to be welded to fit thats no problem. would i need to go street bike engine instead of the 24 hp or will the 24 do ok. any ideas are greatly appreciated thanks
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Old 10-29-2014, 10:44 AM   #2
scottyb
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Default Re: what do i need to do to my cart to climb a sand hill

Nothing is harder to climb than blow sand. You need high rpm & gobs of power to spare, just like the dirt bikes and sand rails. Anything short of a 2 stroke snowmobile or large motorcycle engine is not going to do it IMHO.

PS
I have a cart with 720CC 25hp Subaru engine in it and I don't think it would climb a sand hill.
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Old 10-29-2014, 06:50 PM   #3
TJL
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Default Re: what do i need to do to my cart to climb a sand hill

If the cart is primarily for offroad id probably weld the spider gears in the rear diff. The open diff is probably your biggest prob now. Combine a traction aid with more HP and torque. Id probably do a briggs v twin just for the ease of adding a rev kit and letting it rev higher. Once you have your momentum up and get good tire speed from a torquey higher revving motor you should make it much farther.
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Old 10-29-2014, 07:06 PM   #4
LVCJ
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Default Re: what do i need to do to my cart to climb a sand hill

Quote:
Originally Posted by TJL View Post
If the cart is primarily for offroad id probably weld the spider gears in the rear diff. The open diff is probably your biggest prob now. Combine a traction aid with more HP and torque. Id probably do a briggs v twin just for the ease of adding a rev kit and letting it rev higher. Once you have your momentum up and get good tire speed from a torquey higher revving motor you should make it much farther.
Also to add, you will probably want a more aggressive tire, maybe not quite a paddle, but like a mud/dirt set up with some deeper lugs.

Air the tires down to like 4 to 5 PSI.

Finally, watch total weight. Obviously it would be easier if say it was moving only 2 adults versus 4.
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Old 10-29-2014, 10:59 PM   #5
Downeydirt86
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Default Re: what do i need to do to my cart to climb a sand hill

Thank you everyone for ur responses would a CBR 600 Motorcycle engine and a straight axle be enough power to climb a sand hill
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Old 10-30-2014, 10:25 AM   #6
Unforgiven
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Default Re: what do i need to do to my cart to climb a sand hill

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Originally Posted by Downeydirt86 View Post
Thank you everyone for ur responses would a CBR 600 Motorcycle engine and a straight axle be enough power to climb a sand hill
Plus some paddle tires,.....power is no good unless you get it to the ground.
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Old 10-30-2014, 08:07 PM   #7
sho305
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Default Re: what do i need to do to my cart to climb a sand hill

I've seen video of a guy with a KZ1000 and paddles and straight axle, he could go anywhere in the dunes. He had problems with the rims spinning he had the tires screwed on and was trying to find beadlocks. I'm sure a 600 would do well, but they are harder to drive when you have to shift.

With my clone I can spin both tires in the sand and it goes up a hill slow. You have to spin really fast to get going on sand (like dune or dry beach sand). I have 22x12s so they do float better being wider, those larger tires really helped my cart in sand with stock power but could not climb any hills. These are large knob knobby tires, trailpros. I've heard of people running a directional mud tire like a mudlite/swamp*/etc but with backwards rotation so on sand it acts like a paddle. That way it does not dig down and get you stuck as fast.

A larger atv engine might work, such as a larger polaris atv with cvt drive.
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Old 10-31-2014, 10:09 PM   #8
slonomo
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Default Re: what do i need to do to my cart to climb a sand hill

With a heavy golf cart you're going to need 50-60 hp and 5-6k rpm to get it done, so the 600 engine would do that. A golf cart rear end really wasn't made for that kind of power, either is the cvt setup. If you go with the 600 engine you'll need to fab a straight axle with chain drive. That's a lot of work, and prob some bucks. But it can be done. There's guys on here with threads that show how they did it. It's essentially the same with bike engines. The shift linkage is sometimes the tricky part. With a 6 speed trans you will be able to achieve the wheel speed you need for the dunes, and you'll be able to cruise slow too.

A sled engine on the other hand....that's an easy swap with the cvt. You're going to want a newer liquid cooled twin at a minimum. It's not going to be very good on trails, but in the dunes it will scream! Welding the spider gears is the easy answer, and cheap too. But if it blows, you'll want to get an axle from a newer cart so you can use a posi kit. I think Plowman's sells one for the G16. Sled engines are super loud though. And you have to know 2 strokes to get them to run perfect.

I don't think the 24 Honda is going to cut it. You can run it in the dunes, but not up those hills. The sand just sucks the power.

Definitely paddles!
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