Rummy's Monster Chevy - Pirate4x4.Com : 4x4 and Off-Road Forum

nickrummy · 02-04-2009, 06:23 AM

This isn't really a crawler but thought you guys might get a kick out of it. I just wanted something big to run around outside in the snow and bash with.

Updated 09.09.09

Truck Specs

- 1/6th scale Chevy Silverado body from Wallie World
- Modded TXT chassis with extended upper shock mounts (I have ahd some chassis plates design in CAD I've been trying to get machined but they're to big for most people to do)
- Integy Savage shocks de-anodized and running MGT springs 40wt oil
- Junfac rod ends, 10-32 all thread sleeved with 1/2" OD Delrin
- X-factor Axles converted to 17mm hexes (From a Mammoth ST). Rear Axle is locked front axle has 10k oil. Custom Servo mount I designed and had laser cut out of 16ga steel.
- Ofna full offset rims (I want to change out to something nicer)
- Jumbo Kong tires (8.5" OD)
- E-maxx Trans converted to single speed
- Revo drive shafts (took about 4 complete shafts to make them long enough)

Electronic Specs

- MMM V3 ESC with CC BEC
- Hitec 5995 Steering Servo
- (2) 7T Cobalt Puller Motors
- Turnigy 3S 20C 5000mah lipo
- Spekky receiver (3Pk radio)

YouTube - Junkyard Testing

This is the only picture I have next to 1/10th vehicle. This was a mock up before I got the wheelbase corrected.

urbanmuddboger · 02-04-2009, 10:27 AM

that thing i huge
now build a jump for it and report back

360powerdNISSAN · 02-04-2009, 10:36 AM

trade you for a well built clod crawler. all set up for super class. with many many parts

nickrummy · 02-04-2009, 11:42 AM

Quote:

Originally Posted by 360powerdNISSAN

trade you for a well built clod crawler. all set up for super class. with many many parts

No thanks

nickrummy · 09-09-2009, 06:23 AM

I was over here reading up on some other info and forgot I had this thread started over here. I had the truck tore down and had a chassis designed in CAD I was trying to get machined. Couldn't get anyone to do it so decided to just put it back together to run it. I was getting tired of seeing it sitting on the workbench in parts.

I have a bunch of photos and a few videos so it might be a few posts. Hope that's ok......

I rebuilt the transmission and converted it to a single speed to get rid of some of that rotational mass and cut back on some of the slop. I also changed out shocks. I had plastic shocks from a savage before and now I'm running some aluminum savage shocks with MGT springs. This helped the suspension A LOT.

New shock setup.

Freshly rebuilt trans

Chassis back together. I was going for rear steering but after doing the test run found that the servo I had just didn't how the power to hold the wheels straight under a load (and it's a good 200oz servo too)

Chevy Testing Video

nickrummy · 09-09-2009, 06:26 AM

Another testing session.

Took it to the rocks to see how it would do. The axles complained quite a bit (can't keep the ring and pinion from stripping) but other than that it had plenty of power with the current gearing and the suspension seems pretty stable. Center of gravity was a lot better than I thought. I'm not running any foams at all in the tires. Sometimes it's ok and other times it's not, mainly when there is a heavy load on one tire. I think I'm going to have to modify the stock foams and put them back in.There weren't to many places it wouldn't go. No real challenging climbs.

Then it was over to the baseball field for some low traction high speed testing! They didn't mind me running for a few minutes.

You can definitely see the need for foams when running wide open.

To much fun!

nickrummy · 09-09-2009, 06:31 AM

Then it was time to get a little muddy

Didn't get to much video. It was a new place to run with some massive hills and TONS of mud. I actually got MYSELF stuck in the mud haha

Chevy parking lot bash video

Then towards the end I was racing up a hill against a slash and drifted over to the left and caught a downed tree head on.....

Ended up snapping the output of the diff off and obviously destroyed the axle housing. Broke the housing on the servo and smashed up the servo arm too. Not to bad for a 20lb truck probably doing around 20mph and stopping instantly.

I have lots of spare parts though so didn't take long to get it back up and running. Here are a couple shots out running on some trails with another guy's trucks for size comparison. The jeep has TLT axles and is a 1.9.

Poser shot

heminutt · 09-09-2009, 05:40 PM

sweet rig like the videos do you have one of it muding

nickrummy · 09-10-2009, 07:00 AM

No muddin videos right now. I'll try and get some soon.

sloppy12 · 09-10-2009, 10:34 PM

Want to goto ellet sunday??

We can get some mud on that thing.. I will get the wienie king ready I have to put a pinion on it and I am ready

We can park on that backstreet and goin threw the park so we are not trespassing as much

nickrummy · 09-11-2009, 07:43 AM

The diffs are on their last leg so I might as well end their life in some mud

I'll give you a call when I figure out what the weekend plans are. I should be able to come out and run for an hour or so. My problem last time was no one to take the video. I'd like to try some of those hill climbs out there too

sloppy12 · 09-11-2009, 07:35 PM

well no problem I will drive it for you

you shot the video

I talked to nat. She said she is in for sunday to maybe.. She was not to excited about 9 though

nickrummy · 10-12-2009, 07:26 AM

Here's a thread I made with a muddin video

http://pirate4x4.com/forum/showthrea...566&highlight=

While waiting on the two speed to get here I started looking into something else I've always wanted to do with an RC. It's been done before so it's nothing amazing but I wanted to approach it differently.

YouTube - Monster Truck Goes Sailing is something I'm sure most of you guys have seen and know about.

Stopped at the local Harbor Freight and found some inner tubes that fit inside the Jumbo Kongs. 8" OD x 2.5"w wide for a 4" rim. I'm running 3.2" rims but that's ok.

Deflated inner tube

Added a little air to see how the fit would be

Not to bad. A little narrow.

Drilled a through hole for the valve stem

Put the tire on.

Added about 10psi to see what would happen.

Since the tube was too narrow it didn't stay centered.

I took the stock foam which is 4" wide and cut 2" out of the center. Then I used the 1" rings left over on either side of the inner tube inside the tire.

nickrummy · 10-12-2009, 07:28 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

02-04-2009, 06:23 AM	#1 (permalink)
nickrummy Registered User Join Date: Oct 2006 Member # 81026 Posts: 60	Rummy's Monster Chevy This isn't really a crawler but thought you guys might get a kick out of it. I just wanted something big to run around outside in the snow and bash with. Updated 09.09.09 Truck Specs - 1/6th scale Chevy Silverado body from Wallie World - Modded TXT chassis with extended upper shock mounts (I have ahd some chassis plates design in CAD I've been trying to get machined but they're to big for most people to do) - Integy Savage shocks de-anodized and running MGT springs 40wt oil - Junfac rod ends, 10-32 all thread sleeved with 1/2" OD Delrin - X-factor Axles converted to 17mm hexes (From a Mammoth ST). Rear Axle is locked front axle has 10k oil. Custom Servo mount I designed and had laser cut out of 16ga steel. - Ofna full offset rims (I want to change out to something nicer) - Jumbo Kong tires (8.5" OD) - E-maxx Trans converted to single speed - Revo drive shafts (took about 4 complete shafts to make them long enough) Electronic Specs - MMM V3 ESC with CC BEC - Hitec 5995 Steering Servo - (2) 7T Cobalt Puller Motors - Turnigy 3S 20C 5000mah lipo - Spekky receiver (3Pk radio) YouTube - Junkyard Testing This is the only picture I have next to 1/10th vehicle. This was a mock up before I got the wheelbase corrected. Last edited by nickrummy; 09-09-2009 at 06:33 AM.

02-04-2009, 10:27 AM	#2 (permalink)
urbanmuddboger Registered User Join Date: Nov 2007 Member # 102365 Location: cottonwood ca Posts: 1,171	that thing i huge now build a jump for it and report back __________________ MOLON LABE

02-04-2009, 10:36 AM	#3 (permalink)
360powerdNISSAN Registered User Join Date: Feb 2009 Member # 128865 Posts: 18	trade ya trade you for a well built clod crawler. all set up for super class. with many many parts

10-12-2009, 07:26 AM	#13 (permalink)
nickrummy Registered User Join Date: Oct 2006 Member # 81026 Posts: 60	Here's a thread I made with a muddin video http://pirate4x4.com/forum/showthrea...566&highlight= While waiting on the two speed to get here I started looking into something else I've always wanted to do with an RC. It's been done before so it's nothing amazing but I wanted to approach it differently. YouTube - Monster Truck Goes Sailing is something I'm sure most of you guys have seen and know about. Stopped at the local Harbor Freight and found some inner tubes that fit inside the Jumbo Kongs. 8" OD x 2.5"w wide for a 4" rim. I'm running 3.2" rims but that's ok. Deflated inner tube Added a little air to see how the fit would be Not to bad. A little narrow. Drilled a through hole for the valve stem Put the tire on. Added about 10psi to see what would happen. Since the tube was too narrow it didn't stay centered. I took the stock foam which is 4" wide and cut 2" out of the center. Then I used the 1" rings left over on either side of the inner tube inside the tire. Last edited by nickrummy; 10-12-2009 at 07:27 AM.

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09-09-2009, 06:23 AM	#5 (permalink)
nickrummy Registered User Join Date: Oct 2006 Member # 81026 Posts: 60	I was over here reading up on some other info and forgot I had this thread started over here. I had the truck tore down and had a chassis designed in CAD I was trying to get machined. Couldn't get anyone to do it so decided to just put it back together to run it. I was getting tired of seeing it sitting on the workbench in parts. I have a bunch of photos and a few videos so it might be a few posts. Hope that's ok...... I rebuilt the transmission and converted it to a single speed to get rid of some of that rotational mass and cut back on some of the slop. I also changed out shocks. I had plastic shocks from a savage before and now I'm running some aluminum savage shocks with MGT springs. This helped the suspension A LOT. New shock setup. Freshly rebuilt trans Chassis back together. I was going for rear steering but after doing the test run found that the servo I had just didn't how the power to hold the wheels straight under a load (and it's a good 200oz servo too) Chevy Testing Video

09-09-2009, 06:26 AM	#6 (permalink)
nickrummy Registered User Join Date: Oct 2006 Member # 81026 Posts: 60	Another testing session. Took it to the rocks to see how it would do. The axles complained quite a bit (can't keep the ring and pinion from stripping) but other than that it had plenty of power with the current gearing and the suspension seems pretty stable. Center of gravity was a lot better than I thought. I'm not running any foams at all in the tires. Sometimes it's ok and other times it's not, mainly when there is a heavy load on one tire. I think I'm going to have to modify the stock foams and put them back in.There weren't to many places it wouldn't go. No real challenging climbs. Then it was over to the baseball field for some low traction high speed testing! They didn't mind me running for a few minutes. You can definitely see the need for foams when running wide open. To much fun!

09-09-2009, 06:31 AM	#7 (permalink)
nickrummy Registered User Join Date: Oct 2006 Member # 81026 Posts: 60	Then it was time to get a little muddy Didn't get to much video. It was a new place to run with some massive hills and TONS of mud. I actually got MYSELF stuck in the mud haha Chevy parking lot bash video Then towards the end I was racing up a hill against a slash and drifted over to the left and caught a downed tree head on..... Ended up snapping the output of the diff off and obviously destroyed the axle housing. Broke the housing on the servo and smashed up the servo arm too. Not to bad for a 20lb truck probably doing around 20mph and stopping instantly. I have lots of spare parts though so didn't take long to get it back up and running. Here are a couple shots out running on some trails with another guy's trucks for size comparison. The jeep has TLT axles and is a 1.9. Poser shot

09-09-2009, 05:40 PM	#8 (permalink)
heminutt Registered User Join Date: Feb 2009 Member # 129038 Posts: 179	sweet rig like the videos do you have one of it muding

09-10-2009, 07:00 AM	#9 (permalink)
nickrummy Registered User Join Date: Oct 2006 Member # 81026 Posts: 60	No muddin videos right now. I'll try and get some soon.

09-10-2009, 10:34 PM	#10 (permalink)
sloppy12 Registered User Join Date: Dec 2007 Member # 105183 Posts: 123	Want to goto ellet sunday?? We can get some mud on that thing.. I will get the wienie king ready I have to put a pinion on it and I am ready We can park on that backstreet and goin threw the park so we are not trespassing as much

09-11-2009, 07:43 AM	#11 (permalink)
nickrummy Registered User Join Date: Oct 2006 Member # 81026 Posts: 60	The diffs are on their last leg so I might as well end their life in some mud I'll give you a call when I figure out what the weekend plans are. I should be able to come out and run for an hour or so. My problem last time was no one to take the video. I'd like to try some of those hill climbs out there too

09-11-2009, 07:35 PM	#12 (permalink)
sloppy12 Registered User Join Date: Dec 2007 Member # 105183 Posts: 123	well no problem I will drive it for you you shot the video I talked to nat. She said she is in for sunday to maybe.. She was not to excited about 9 though

10-12-2009, 07:28 AM	#14 (permalink)
nickrummy Registered User Join Date: Oct 2006 Member # 81026 Posts: 60	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