RCCrawler Forums

NickRummy · 10-12-2009, 08:24 AM

Inflated to 20psi (on mistake, thought the gauge said 10psi) next to a jumbo kong that has nothing inside it.

You're probable wondering the size difference? The stock Kong measured 8.4". The inflated Kong?

Yes, it's insanely big!

However, 20psi was too much and the inner tube blew sometime over night.

I have to pick up another one at lunch today. I built the 3 other tires and they have all held at 10psi so far and measure around 9" OD

Culetto · 10-12-2009, 09:56 AM

Haha, thats sweet, to bad the 20PSI didnt hold looked like a serious farm mudder.

crazyorigin · 10-12-2009, 07:53 PM

Holy Crap! Sweet truck! Those tubed tires look pretty sweet, definetly bump up the size factor. Curious to see a video of them in action.

MattTheGenus · 10-12-2009, 08:08 PM

sick truck, I like your xmod nsx too, what upgrades does it have?

NickRummy · 10-13-2009, 12:00 PM

Quote:

Originally Posted by MattTheGenus

sick truck, I like your xmod nsx too, what upgrades does it have?

It's not functional. Just a body and chassis with wheels.

Now for an update.

i just had to run over some stuff with the tires inflated to 10spi :crazy:

Now for the fun :chug:

Video: Chevy Monster in the water

Definitely in need of larger tires with more displacement. It sits way to low under the water.

smm_cbf · 10-13-2009, 01:30 PM

oops..lol nice test vid, I see what you mean about the floating level
I'll post up the pics of the chevy on the lake, just need to dig trough PB

NickRummy · 10-13-2009, 01:41 PM

Quote:

Originally Posted by smm_cbf

oops..lol nice test vid, I see what you mean about the floating level
I'll post up the pics of the chevy on the lake, just need to dig trough PB

yeh I sent you a PM because I remember seeing the avalanche floating and it was only sitting about 2-3" in the water but the Swamp Kongs you had were INSANELY wide.

smm_cbf · 10-13-2009, 01:51 PM

Quote:

Originally Posted by NickRummy

yeh I sent you a PM because I remember seeing the avalanche floating and it was only sitting about 2-3" in the water but the Swamp Kongs you had were INSANELY wide.

Yea, they were stock width and never glued to the rims either. Drilled a hole in the rim and stuck in a air valve and had a football pump to fill it with air. Never did like the width so I got them narrowed but was fun being able to go boating

NickRummy · 10-13-2009, 01:58 PM

Cool. Makes perfect sense to me then because the bead on these kongs with the maxx rim is REALLY tight. I have some new rims coming that are 4" wide so hopefully that'll get her on top of the water

The truggy wheels I'm running are only 2.3" wide.

Do you know much your avalanche weighs?

smm_cbf · 10-13-2009, 02:07 PM

Just an idea but you might try not putting the air tubes in the tires at all. I never ran mine like that and just filled what ever space was in the wheels with no foam. The chevy was heavy as all can be, not to mention I ran 12cells so that was a lot right there...I'm not sure but maybe 15 pounds??

NickRummy · 10-13-2009, 02:36 PM

I actually have been reading up on buoyancy and what it takes to float things in water. Pretty easy really. All you have to do is displace the amount of water that your vehicles weighs. So if my truck weighs 20lbs then when I set it in the water it needs to displace 20lbs of water in order to float. If I want the truck to float so that the water line is half way up my wheels when it's floating then that means each half of wheel needs to displace about 0.6 gallons of water which is about 5lbs of water (1G = 8.35lbs)

1.0 Gallon = .134 cu ft
0.6 Gallon = .08 cu ft

If I can get the Jumbo Kong on a 4" rim the whole tire should displace about 0.129cu ft. So it turns out that I probably won't be able to have the water line at the middle of the wheel. It will be more like 5" from the bottom of the tire which is close enough. Of course weight bias on the truck is going to make the back sit deeper than the front since I have the battery towards the back.

Sorry for all the thinking. I get bored at work and like to think things out sometimes

rocpede · 10-13-2009, 03:44 PM

looks awsome NickRummy, keep up the good work. and if u ever a axle again i spare set that i'll sell cheap.

rich

NickRummy · 10-19-2009, 11:39 AM

I got in a set of Ofna Pirate rims because they're 4" wide, almost full offset like my truggy wheels and 17mm. How perfect right!? Wrong. I went to mount the Jumbo Kong on there and it turns out the Ofna rim is smaller than the 3.2" maxx size rim. So the tire would never fit on there correctly.

Took me a while to come up with a solution and it's still not perfected but it's forward progress. I had a set of rims that come with the jumbo kongs and these fit well enough that they hold air without even being glued. So I know I wanted the beads from these rims. Got the calipers out and did some measuring and came up with a plan.

Cut the bead rings off the rims that come with Kongs using a band saw then cleaned up with a belt sander. The front is going to need a lot of clean up work with the dremel since some of the center cut off with it. Should be ok though. I'll be using this on the backside of the modded rim just in case it doesn't look as nice.

Setup the router to take the lip off the edge of the rim and leave just a tad bit of material to make the fit nice.

Now the rim has a new bead that I know holds air :thumbsup

Backside of the rim will be the same using the front of the cut up rim, it's just going to take some work cleaning up that bead. I'll glue these rings on with CA then I'll run a bead of silicone around the inside just to make sure it's sealed up.

cruiserkb · 10-19-2009, 05:50 PM

Those tires are going to be awesome once you get all of the bugs worked out. Looks like you are getting a handle on that situation. Are you going to be using the tubes again or just filling the tires with air? I like the tube idea but the stem might throw off the balance when you run at high speed ( you have proved that this rig likes to go fast! ). Keep the pic's coming!

NickRummy · 10-20-2009, 06:19 AM

No more inner tubes. They added weight and didn't have enough size to keep the truck floating.

The valve stems will definitely throw the balance of the wheels off but they were balanced terribly before the stems were added

This set of wheels will only be for water. I have another set that will be for every day running.

NickRummy · 10-20-2009, 10:32 AM

The goal at lunch time today was to get the front ring cleaned up since it still had a lot of center section left. There was no real easy way to do it so out came the dremel with the cut off wheel and a lot of patience.

Here's what I got it trimmed up to. I still need to get it cleaned up but at least I can test it.

So here's the modded Ofna Pirate rim. Outer lip taken off the front and the rear lip completely taken off the back and the front and rear rings from the kong rims.

Here's the slip fit on both sides to see how it goes together. All seems perfect! I'll get the rings epoxied on and should be set.

Now I just need to get the rest all cleaned up and assembled and I think I'll paint them up so they look decent.

NickRummy · 10-22-2009, 07:09 AM

Hopefully this will be the last of the boring wheel posts

Got the front and rear rings cleaned up and epoxied onto the center section. Drilled a hole and installed my blingtastic valve stems from Summit Racing. You can see the bead of the epoxy around the ring.

The tires are MUCH wider looking. Looks more like a monster truck wheel now.

You can see the difference in the sidewalls pretty well in this pic.

They hold air well but not good enough to hold air over night. Should be fine for testing. Brought the camera and truck with me today so hopefully at lunch time it'll do some floating!

Tuffguy · 10-22-2009, 07:48 AM

Looking good, just a quick question................How many pairs do you have?

NickRummy · 10-22-2009, 08:02 AM

Quote:

Originally Posted by Tuffguy

Looking good, just a quick question................How many pairs do you have?

Of the Kongs? I think I have 3 full sets but somehow I ripped the bead on one tire.

NickRummy · 10-22-2009, 12:37 PM

How about some pictures first

Now how about a little power

You know I had to take a video

Chevy MT Floating Video

10-12-2009, 08:24 AM	#121
NickRummy RCC Addict Join Date: Aug 2005 Location: Akron Posts: 1,784	Inflated to 20psi (on mistake, thought the gauge said 10psi) next to a jumbo kong that has nothing inside it. You're probable wondering the size difference? The stock Kong measured 8.4". The inflated Kong? Yes, it's insanely big! However, 20psi was too much and the inner tube blew sometime over night. I have to pick up another one at lunch today. I built the 3 other tires and they have all held at 10psi so far and measure around 9" OD

10-12-2009, 09:56 AM	#122
Culetto RCC Addict Join Date: Jul 2008 Location: Sin City Posts: 1,332	Haha, thats sweet, to bad the 20PSI didnt hold looked like a serious farm mudder.

10-12-2009, 07:53 PM	#123
crazyorigin Sometimes, I make things. Join Date: May 2009 Location: Mt. Upton Posts: 1,043	Holy Crap! Sweet truck! Those tubed tires look pretty sweet, definetly bump up the size factor. Curious to see a video of them in action.

10-12-2009, 08:08 PM	#124
MattTheGenus Quarry Creeper Join Date: Sep 2009 Location: Las Vegas Posts: 476	sick truck, I like your xmod nsx too, what upgrades does it have?

10-13-2009, 01:30 PM	#126
smm_cbf Rock Crawler Join Date: Aug 2007 Location: Orlando Posts: 512	oops..lol nice test vid, I see what you mean about the floating level I'll post up the pics of the chevy on the lake, just need to dig trough PB

10-13-2009, 01:58 PM	#129
NickRummy RCC Addict Join Date: Aug 2005 Location: Akron Posts: 1,784	Cool. Makes perfect sense to me then because the bead on these kongs with the maxx rim is REALLY tight. I have some new rims coming that are 4" wide so hopefully that'll get her on top of the water The truggy wheels I'm running are only 2.3" wide. Do you know much your avalanche weighs?

10-13-2009, 02:07 PM	#130
smm_cbf Rock Crawler Join Date: Aug 2007 Location: Orlando Posts: 512	Just an idea but you might try not putting the air tubes in the tires at all. I never ran mine like that and just filled what ever space was in the wheels with no foam. The chevy was heavy as all can be, not to mention I ran 12cells so that was a lot right there...I'm not sure but maybe 15 pounds??

10-13-2009, 02:36 PM	#131
NickRummy RCC Addict Join Date: Aug 2005 Location: Akron Posts: 1,784	I actually have been reading up on buoyancy and what it takes to float things in water. Pretty easy really. All you have to do is displace the amount of water that your vehicles weighs. So if my truck weighs 20lbs then when I set it in the water it needs to displace 20lbs of water in order to float. If I want the truck to float so that the water line is half way up my wheels when it's floating then that means each half of wheel needs to displace about 0.6 gallons of water which is about 5lbs of water (1G = 8.35lbs) 1.0 Gallon = .134 cu ft 0.6 Gallon = .08 cu ft If I can get the Jumbo Kong on a 4" rim the whole tire should displace about 0.129cu ft. So it turns out that I probably won't be able to have the water line at the middle of the wheel. It will be more like 5" from the bottom of the tire which is close enough. Of course weight bias on the truck is going to make the back sit deeper than the front since I have the battery towards the back. Sorry for all the thinking. I get bored at work and like to think things out sometimes

10-13-2009, 03:44 PM	#132
rocpede RCC Addict Join Date: Jun 2004 Location: Bruiser Heaven!!!! Posts: 1,463	looks awsome NickRummy, keep up the good work. and if u ever a axle again i spare set that i'll sell cheap. rich

10-19-2009, 11:39 AM	#133
NickRummy RCC Addict Join Date: Aug 2005 Location: Akron Posts: 1,784	I got in a set of Ofna Pirate rims because they're 4" wide, almost full offset like my truggy wheels and 17mm. How perfect right!? Wrong. I went to mount the Jumbo Kong on there and it turns out the Ofna rim is smaller than the 3.2" maxx size rim. So the tire would never fit on there correctly. Took me a while to come up with a solution and it's still not perfected but it's forward progress. I had a set of rims that come with the jumbo kongs and these fit well enough that they hold air without even being glued. So I know I wanted the beads from these rims. Got the calipers out and did some measuring and came up with a plan. Cut the bead rings off the rims that come with Kongs using a band saw then cleaned up with a belt sander. The front is going to need a lot of clean up work with the dremel since some of the center cut off with it. Should be ok though. I'll be using this on the backside of the modded rim just in case it doesn't look as nice. Setup the router to take the lip off the edge of the rim and leave just a tad bit of material to make the fit nice. Now the rim has a new bead that I know holds air :thumbsup Backside of the rim will be the same using the front of the cut up rim, it's just going to take some work cleaning up that bead. I'll glue these rings on with CA then I'll run a bead of silicone around the inside just to make sure it's sealed up.

Sponsored Links

10-19-2009, 05:50 PM	#134
cruiserkb Rock Crawler Join Date: Jul 2008 Location: gilbert Posts: 613	Those tires are going to be awesome once you get all of the bugs worked out. Looks like you are getting a handle on that situation. Are you going to be using the tubes again or just filling the tires with air? I like the tube idea but the stem might throw off the balance when you run at high speed ( you have proved that this rig likes to go fast! ). Keep the pic's coming!

10-20-2009, 06:19 AM	#135
NickRummy RCC Addict Join Date: Aug 2005 Location: Akron Posts: 1,784	No more inner tubes. They added weight and didn't have enough size to keep the truck floating. The valve stems will definitely throw the balance of the wheels off but they were balanced terribly before the stems were added This set of wheels will only be for water. I have another set that will be for every day running.

10-20-2009, 10:32 AM	#136
NickRummy RCC Addict Join Date: Aug 2005 Location: Akron Posts: 1,784	The goal at lunch time today was to get the front ring cleaned up since it still had a lot of center section left. There was no real easy way to do it so out came the dremel with the cut off wheel and a lot of patience. Here's what I got it trimmed up to. I still need to get it cleaned up but at least I can test it. So here's the modded Ofna Pirate rim. Outer lip taken off the front and the rear lip completely taken off the back and the front and rear rings from the kong rims. Here's the slip fit on both sides to see how it goes together. All seems perfect! I'll get the rings epoxied on and should be set. Now I just need to get the rest all cleaned up and assembled and I think I'll paint them up so they look decent.

10-22-2009, 07:09 AM	#137
NickRummy RCC Addict Join Date: Aug 2005 Location: Akron Posts: 1,784	Hopefully this will be the last of the boring wheel posts Got the front and rear rings cleaned up and epoxied onto the center section. Drilled a hole and installed my blingtastic valve stems from Summit Racing. You can see the bead of the epoxy around the ring. The tires are MUCH wider looking. Looks more like a monster truck wheel now. You can see the difference in the sidewalls pretty well in this pic. They hold air well but not good enough to hold air over night. Should be fine for testing. Brought the camera and truck with me today so hopefully at lunch time it'll do some floating!

10-22-2009, 07:48 AM	#138
Tuffguy Gold Star Baby Momma! Join Date: Feb 2004 Location: Maumelle, Ar Posts: 713	Looking good, just a quick question................How many pairs do you have?

10-22-2009, 12:37 PM	#140
NickRummy RCC Addict Join Date: Aug 2005 Location: Akron Posts: 1,784	How about some pictures first Now how about a little power You know I had to take a video Chevy MT Floating Video

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