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armymp
01-02-2012, 08:43 PM
Here are some pics of a R21 that I have been working on for the past 8 months. I actually already went for the first test ride and broke the RPM mount that I had made. I am currently waiting for my heims so I can make a stronger upper mount. I will update as I get the parts for the mount. I hope to have some video in about a week or so.

armymp
01-02-2012, 08:50 PM
Here are more pics. It powered by a RC51 engine and it has a RPM for reverse. Please don't ask how much it cost because if the wife ever found out I would be sleeping in it. And if it looks small in the pics it's because it is. I am 5'8" and it's tight for me. There is plenty of headroom though. Feel free to ask any questions.

boilermaker
01-02-2012, 11:10 PM
I am looking forward to seeing more pictures and videos of your tests. Especially any pictures of the engine hook-up and the RPM.Thanks.

TutTech
01-03-2012, 02:08 AM
I have always had a soft spot for the R21 and if I didn't want to design and build my own car then i would have bought his plans and built one myself.
Sounds good about the rpm box for reverse but ya little pricey right... Hope you get that all dialed in soon and look forward to seeing more pics and maybe some video also..

Plus maybe we can meet up and do some riding together some time. I would look forward to seeing your build it looks good.
:)

flangehead
01-03-2012, 05:36 PM
Looks great dude! I like the aluminum body, you did a great job with it. Please post more pics

Bullnerd
01-03-2012, 05:44 PM
Very cool,looking forward to some vids.
Is this the first R21 on the MBN?
Hows it handle?
Nice job.

armymp
01-03-2012, 06:49 PM
I will get more pics when I get the RPM back in. The top mount I am making is kinda overkill (5/8 heims) but it's what I have on hand. Car handles great even in the rough terrain around Barstow. I still have to dial in the shocks. If anyone would have told me how fast it is I would not have believed them. If I had it to do over I would go with one of Tut's frames. I have more in tools to make a frame than his cost ready to weld. It was a great learning experience though.

Deranged
01-03-2012, 06:50 PM
Awesome!! I have wanted to see a build up! I think this is the first one built here. Hmmmm, I think this might be a sign...lol!! Keep the pictures coming!

Xtreme Fabrication LLC
01-03-2012, 07:47 PM
Definitely get some good pics of how you are mounting the RPM box if you can. I am getting ready to have to come up with someway to mount mine and its hard to find any pictures any where.
Looks great ! Keep up the good work.

TutTech
01-03-2012, 11:49 PM
Hey Armymp thanks for the kind words that was cool. Seriously though right? Coming from VW cars and heavy desert stuff I wouldn't call my stuff fast.. ya it gets up to speed and ya it goes fast but I wouldn't call my other cars fast per say.
Now sure I have been in bigger v-8 Mosebuilt cars and ya those are fast.. but big and tons of power and that comes with a huge price tag to make that power.....

Then you get in a Mini Buggy and you rap up those rpms and let it fly and that's fast!
Taking off, acceleration, response with my efi, light weight etc. and then the top speed isn't bad either. Especially for such a small car.
They are fast and mostly so fun to drive.. I love to just pitch the back, hang a corner or just drive. :D

Very fun and glad you like yours it sounds as much as I do mine.
I hope to meet up with you out at the desert. Good luck with the little fixes and see ya soon.
:)

Toddy
01-04-2012, 12:31 AM
Great to see a finished R21!
I have the R21 front suspension on my buggy and love the way it handles and steers.
Looking forward to seeing some more pics and hopefully some video.

armymp
01-04-2012, 08:10 PM
Here are some pics of the RPM mount. I broke the original so I kinda went overkill on this one. The lower bolts are 5/8 and the upper heims are 5/8 also. This setup gives me about two inches of adjustment on the cahin. If I break this one I have no idea what I am going to do.

On a side note does anyone know where I can get a 20 tooth Hayabusa sprocket?

armymp
01-04-2012, 08:12 PM
more pics of the mount

Bullnerd
01-04-2012, 08:12 PM
Was the original mount built to Rortys specs?

armymp
01-04-2012, 08:21 PM
Rorty has the rpm solid mounted to the frame. I wanted to be able to adjust the chain without a idler srocket. The first mount I made was only 1/8 inch steel for the lower and it bent allowing the top to move around and sheared a 3/8 bolt that I used to tension the top. I still have to redo the exhaust this weekend. When the mount broke it put a serious dent in the rear pipe. Should have video on Sunday.

armymp
01-07-2012, 08:44 PM
here is a video the wife shot of me testing the buggy near my house.

Rorty R21 first test - YouTube (http://www.youtube.com/watch?v=QaLQ72pXT6A&context=C3dd69e2ADOEgsToPDskJvvWy4s1XM0AIkcl7GSz6-)

armymp
01-07-2012, 09:04 PM
rorty R21 minibuggy - YouTube (http://www.youtube.com/watch?v=CwGHzTKaZ_g&context=C3dd69e2ADOEgsToPDskJvvWy4s1XM0AIkcl7GSz6-)

wjfawb0
01-07-2012, 10:45 PM
If I had it to do over I would go with one of Tut's frames. I have more in tools to make a frame than his cost ready to weld. It was a great learning experience though.

I hear you about the learning experience. Bending tube, notching and preparing it all to be welded is very time consuming. Keep up the good work, though. I tell everyone around me who asks why I'm doing it, "Well, when the zombie apocalypse happens, I'll be a hell of a lot more useful. I can make s**t." :D

Deranged
01-08-2012, 11:14 AM
Cool videos! That thing looks cool as heck!

Justin

Toddy
01-09-2012, 02:35 PM
Cool video! great to see it in action

TutTech
01-09-2012, 09:32 PM
Nice bracket and set up.. no such thing as over kill... ;)

Watching the videos.. they look great.. and it looks good nice jumps! It looks like it is handing well and doing great.. Wow it looks small.. very cool.

Thanks for the videos.. we love videos on here so thanks for sharing them.
;)

rgvkid
02-13-2012, 02:57 PM
The R21 Came out great! I Have been thinking of building a single seater for the kids with a 13hp Briggs or HF engine.

Whats wheels did you use on yours. Are they just wide 5 steel wheels?

I really like the videos! I bet if you played with the suspension some you could get more travleout of it. Im surprised that the Rorty sight says the rear only gets 13.5 travel. What Cvs did you end up using?

fatal-exception
02-13-2012, 03:26 PM
Cool man! Any finished buggy is a cool buggy!:D What's in it for an engine?

armymp
02-14-2012, 08:22 PM
The wheels are just basic steel wheels. I plan on upgrading to aluminum beadlocks when funds allow. For now they work just fine. I am using 930 cv's. Probably overkill but when you are in the middle of the desert I don't feel like chasing balls everywhere. For engine I am using a Rc51. I have a 16 tooth on the engine and a 19 on the RPM. Chain life has been good so far. I still on the original chain. I have about 8hrs of hard running on it. It doesn't get much harder than Barstow. As for rear wheel travel it's probably 12-13 inches. I have 5 inches under the pan at full bump. I really need to update the pics. I will have some this weekend.

rgvkid
02-14-2012, 08:38 PM
Where are you located? Im in San Gabriel valley, Irwinadale. With 930s you should be getting more travel out of your suspension for sure. Maybe you just need some tweeking of shock locations.

I always try to overkill, last thing is to be repairing in the dirt due to underkill.

armymp
02-15-2012, 07:13 PM
I probably could get a inch or more but I would have to get new shocks. I really don't have a problem with lack of travel. I have been adding oil in 5cc and have got it to stop bottoming. I still have to dive into revalving it. I was kinda hoping someone on here would make a how to. If no one does I will since I can't find a step by step on air shock revalving.

JoesEdge
06-08-2012, 09:09 AM
I will get more pics when I get the RPM back in. The top mount I am making is kinda overkill (5/8 heims) but it's what I have on hand. Car handles great even in the rough terrain around Barstow. I still have to dial in the shocks. If anyone would have told me how fast it is I would not have believed them. If I had it to do over I would go with one of Tut's frames. I have more in tools to make a frame than his cost ready to weld. It was a great learning experience though.

Wow! I was just emailing Rorty recently about this design. Funny, if I build it I'd be taking it to Barstow too.

So you're saying that you'd buy one of Tut's instead. Tut has some nice buggies and I've seen them race. I've always liked them.

How much was the build cost? How much cockpit room do you have?




Where are you located? Im in San Gabriel valley, Irwinadale. With 930s you should be getting more travel out of your suspension for sure. Maybe you just need some tweeking of shock locations.

I always try to overkill, last thing is to be repairing in the dirt due to underkill.

Hey rgvkid, you're practically a neighbor. You're just up the 605 fro me. I'm in Downey. I've been wanting to build a buggy for my kid too. Well, for my kid and I since my kid is already taller than me. LOL He's outgrown his go karts. Time to build something bigger.

armymp
06-09-2012, 10:05 PM
I am 5'8" and I can adjust the seat if needed for someone probably 6 foot. any bigger than that you head is going through the roof. The reason I would buy one of Tuts is you will not have to buy a bender. The bender was a 600 investment then throw in a quality notcher and you are closer to 800. Then you still have to buy plans/tubing/steel for jigs. I have about 600 dollars in tubing alone into it. The fact that I built the buggy myself I cannot put a price on however. It's kinda nice to have people over and they ask where where I bought it. Then I point to a stick of DOM in the corner and tell them I built it out of that. It's worth it to me. Explaining it to your wife however is the hard part. I am currently working on getting dual disk at the rear end to replace the disk on the RPM. I am using disk off a S10 turned down on a lathe and Wilwood calipers. I will post pics tomorrow.

chuckorlando
06-10-2012, 04:20 AM
Awsome machine. Only thing I dont like about the rorty plans is the nose of his cars. They seem way tall.

Rorty makes the best plans I've come across. I love them. Tut makes the best priced frame and rollers. More than price you know your getting a very well built machine.

armymp
06-10-2012, 09:42 PM
Here are some pics of the rear brakes I have been working on. And one of my new (to me at least) favorite tool. I couldn't stomach the thought of paying 500-1k for a rear brake set up. I spent 25 dollars on the S10 front rotors and 79 each for the rotors. I only had to buy one extra rotor since the one was already on the trans brake. I machined off the inside of the rotor and turned it down to 9.25 inches. I then took 1 inch rod and faced it to 1.4 inches long and counter bored for the allen head bolts. The bolts are 8mm by 40mm. I then welded them to the rear hub carrier. The lathe is a atlas/craftsman 10 inch. It was built in 1954 but it still works great for what I do. I highly suggest to anyone that is building a buggy to get a lathe. I paid 400 for this one and added about 200 in tooling and I was good to go.

armymp
06-10-2012, 09:51 PM
Here is a list of parts for anyone that wants to do it.
1997 chevy S10 front rotors. 25 dollars each
PS1 wilwood rotors 79 dollars each
1 inch steel rod 10 dollars 12 inches
8mm X40mm cap bolts 5 dollars for 4
-3 brake lines/fittings 60 dollars
The cost difference between doing this and buying a kit paid for the lathe.

JoesEdge
06-11-2012, 08:01 PM
I am 5'8" and I can adjust the seat if needed for someone probably 6 foot. any bigger than that you head is going through the roof. The reason I would buy one of Tuts is you will not have to buy a bender. The bender was a 600 investment then throw in a quality notcher and you are closer to 800. Then you still have to buy plans/tubing/steel for jigs. I have about 600 dollars in tubing alone into it. The fact that I built the buggy myself I cannot put a price on however. It's kinda nice to have people over and they ask where where I bought it. Then I point to a stick of DOM in the corner and tell them I built it out of that. It's worth it to me. Explaining it to your wife however is the hard part. I am currently working on getting dual disk at the rear end to replace the disk on the RPM. I am using disk off a S10 turned down on a lathe and Wilwood calipers. I will post pics tomorrow.

Thanks for the responses! Sounds like I should be comfortable in it then since I'm only 5' 7" tall.

I hear you on the tools thing. The tools are expensive. If I would have known how inexpensive Tut's frames were, I would have gone that route too but I already bought a JD2 bender.

Still, It would be great to have the satisfaction of building my own as well.

By the way, where did you get your lathe? I was considering getting a Harbor Freight mini lathe. I have done some research on them, and most people seem to like them.

armymp
06-11-2012, 08:33 PM
For the price of the cheapest harbor freight lathe you can buy a used 10+ inch lathe. If I had it to do over I would have bought at least a 12 inch lathe. Just keep your eye out for a atlas or southbend lathe. When I bought mine the guy was also selling a 10x56 atlas for 400 but I don't work anything near that long. The atlas also comes with power cross feed which is a nice bonus.

JoesEdge
06-13-2012, 02:59 PM
For the price of the cheapest harbor freight lathe you can buy a used 10+ inch lathe. If I had it to do over I would have bought at least a 12 inch lathe. Just keep your eye out for a atlas or southbend lathe. When I bought mine the guy was also selling a 10x56 atlas for 400 but I don't work anything near that long. The atlas also comes with power cross feed which is a nice bonus.

Where did you find yours? A lathe would be great for making tube ends and stuff like that.

What else did you use it for?

armymp
06-13-2012, 07:47 PM
There is a logan on Inland Empire craigslist right now. It's in Rancho Cucamunga. If you keep a eye out tnere are some great lathes for sale. I see them all the time now. I only looked for a week when I found mine. Go to you tube there are a couple vids on how to buy a lathe. Good luck they are really handy.

JoesEdge
06-14-2012, 12:22 PM
There is a logan on Inland Empire craigslist right now. It's in Rancho Cucamunga. If you keep a eye out tnere are some great lathes for sale. I see them all the time now. I only looked for a week when I found mine. Go to you tube there are a couple vids on how to buy a lathe. Good luck they are really handy.

Right on! I'll check Criagslist now. I'm just not familiar with them enough to know the good brands from the bad ones. Or what else to look for and stuff like that.

Regarding your R21, do the plans require a reverse gearbox? Or, can you omit that in order to save money?

Thanks again!

armymp
06-14-2012, 09:19 PM
you could always go with a jack shaft set up. If you go with a reverse set up go with the lowest ratio (numerically) as you can. I went with a 4.7 rpm box and wish I had a 3.9. I can get all the speed I need but the small rear sprocket makes the chain get hot. Make sure you can still get the parts from Kludge before you pay for the plans. He was having health issues last year at this time. I hope he is doing better. If you have a lathe you can make all the round parts and have someone laser cut your other parts.

JoesEdge
06-15-2012, 01:32 PM
you could always go with a jack shaft set up. If you go with a reverse set up go with the lowest ratio (numerically) as you can. I went with a 4.7 rpm box and wish I had a 3.9. I can get all the speed I need but the small rear sprocket makes the chain get hot. Make sure you can still get the parts from Kludge before you pay for the plans. He was having health issues last year at this time. I hope he is doing better. If you have a lathe you can make all the round parts and have someone laser cut your other parts.

Oh wow, I was about to buy plans right now too.

Kludge is on this site?

What do you think about the R6? The R11 is also another favorite of mine, but it seems too big.

I also bought Desert Karts Panther plans. They're not expensive, so it wouldn't hurt to have a set.

Bullnerd
06-15-2012, 02:42 PM
Kludge is on this site?-not for a long time.

You should e-mail Rorty,might clear up some of your questions.If Kludge isnt making parts anymore I would ask Rorty to give you the DXF and just go to the laser place in Oregon that everyone uses.(cant remember the name)

JoesEdge
06-15-2012, 02:46 PM
Kludge is on this site?-not for a long time.

You should e-mail Rorty,might clear up some of your questions.If Kludge isnt making parts anymore I would ask Rorty to give you the DXF and just go to the laser place in Oregon that everyone uses.(cant remember the name)

Actually, I did email Rorty and he told me that I could get all the parts in Oregon. I thought Kludge and the "Oregon Parts Place" was one and the same. So you're saying it's not?

I corresponded with Rorty last week by the way.

Bullnerd
06-15-2012, 03:06 PM
So Rorty is still holding on to his DXF files.

Rorty is probably talking about Kludge in Oregon,and yes he's probably calling it the parts place.I'm talking talking about getting the DXF files and going directly to the laser store,GK machine,which is also in oregon.(which is what Kludge is doing)

Did Rorty tell you excactly how to get in touch with Kludge?

armymp
06-19-2012, 07:37 PM
If you are out here in California you can't go wrong with the R11. I also bought those plans and they are top notch. The parts I got from Kludge were top notch that is for sure. It took a little while but he got them all to me. Make sure you can get a hold of him before you buy plans.

JoesEdge
06-20-2012, 01:35 PM
So Rorty is still holding on to his DXF files.

Rorty is probably talking about Kludge in Oregon,and yes he's probably calling it the parts place.I'm talking talking about getting the DXF files and going directly to the laser store,GK machine,which is also in oregon.(which is what Kludge is doing)

Did Rorty tell you excactly how to get in touch with Kludge?

I haven't gotten that far yet. But, I may email him regarding this information.


If you are out here in California you can't go wrong with the R11. I also bought those plans and they are top notch. The parts I got from Kludge were top notch that is for sure. It took a little while but he got them all to me. Make sure you can get a hold of him before you buy plans.

Yeah..I'm out here in California. I'm in Downey, CA to be exact. I was hoping to go to the MORE Freedom 200 next month.

The R11 is a really nice looking buggy and I was considering it, but it's pretty big. I wonder if anyone here has built one. I'd like to see it.

I held off from buying the plans as of yet. I sort of got spooked with the whole Kludge thing.

I do have a set of the Panther Kart plans sitting on my desk. Not exactly near the same thing, but figured it's only 50 bucks so why not?

Bullnerd
06-20-2012, 02:57 PM
I remember way back, Downey toyota was the stuff!

JoesEdge
06-21-2012, 06:15 PM
I remember way back, Downey toyota was the stuff!

Downey Off-Road? Yeah, they went out of business. I don't know much about them though since I don't own a Toyota. My Ranger has Camburg Suspension on it.

Bullnerd
06-21-2012, 06:59 PM
I bet I still have a Downey catalog!

R11!

JoesEdge
06-22-2012, 09:16 AM
armymp...so, any new pics or vids of the R21? I'd like to see what the inside looks also the rear diff too.

armymp
06-22-2012, 09:01 PM
The rear end is a RPM trans. I will update pics this weekend. I have better pics of the rear brake upgrade. I will try to get some video too.