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EP Savage X build
Ok, Im very new to conversion builds and Ive been thinking about doing a savage x conversion of some sorts. I recently did a little ebay "research" to scope out prices.
All I can say is I am THOROUGHLY SCHOCKED at how inexpensive it is to build your own GP savage roller. Ive tallied up some parts for you and Ill show what Ive found so far. These are all from the "chop shop" guys on ebay. Suspension arms: -------------------------Bought for $13 shipped. Bulkheads + Diffs + Shock Towers: -----Bought both front and rear for $47.20 shipped. Bumper + Skid assembly: ---------------Bought front and rear for $8 shipped. X TVPs: ------------------------------------Bought for $15 shipped. CVDs (dogbones + cups): ---------------~$35 for all shipped. Center diff and mount: -------------------Bought for $27 shipped. Bellcrank/Servo Saver assembly: ------Bought for $6.50 shipped. Axle carriers + bearings: ----------------Bought for $13 shipped. Suspension arm hinge pins: -------------Bought front and rear for $4 shipped. Screw set + misc: ------------------------Bought for $12 shipped. F/R Turnbuckles: --------------------------Bought for $6.70 shipped. Total cost so far... ----------------- $152.40 (Still makes my tiny wallet cry!) The rest of the items that I can think of are small little parts that wont amount to much more. So what I have here has a total price of about $200. This comes as a big suprise to me... I always thought it would cost so much more to build a roller out of new parts. I had originally planned on buying a whole slew of hopups for my e-savage (Im Joey on www.e-savage.com also)... Looks like I found a new project!! If anyone sees anything big missing, PLEASE let me know. All updates will be in this thread. Parts list will be updated when new items are bought, though the major bits have been bought already... just waiting on the last few to arrive. Thanks for looking. |
Pictures of the main parts as they rolled in ---
http://i181.photobucket.com/albums/x...funny/Arms.jpg http://i181.photobucket.com/albums/x...unny/axles.jpg http://i181.photobucket.com/albums/x...y/DSCN2370.jpg http://i181.photobucket.com/albums/x...y/DSCN2369.jpg http://i181.photobucket.com/albums/x...servosaver.jpg |
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Ive seen alot of amazing builds on these forums so Im looking forward to any input you all can give me. I bought some sluminum chassis braces
in the hopes that I can somehow make a center diff mount work. Is the GP motor plate something I should look into to mount the center diff onto?? Like I said Im new to GP trucks and conversion buils in general, so any info would be appreciated! |
Hey Joey, looks like you have most of it... I have built a few gp savvy conversions, one on a old 21 and another with the flm chassis and new X SS kit. They seem reasonably straightforward, but i am using stock trannies in mine. Bithead has a cool looking savvy/hellfire hybrid that might give you some ideas on the center diff. He has a thread around here, think the truck is named brimstone, try searching that.
Metalman also has a savvy with a custom mounted center diff, check that out too. I am just sticking with the stock 2 speed tranny locked in 2nd gear, should work well for my purposes... |
Yeah Ive talked to Bithed quite a bit about it on esavage.com... hes a great help. Lots of great material here to get ideas from. Did you find a way to mount your 2 speed tranny lower in the 21 chassis or did you just throw it in the stock position?
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My attention was brought to this speed/gearing calculator and it is amazing. I used it to get the following numbers...
http://www.scriptasylum.com/rc_speed/_top_speed.html For savage diffs, center diff, 48T spur, 14T pinion, feigao 8XL (2084 kv), 16.8V nimh (I know.. I know...), and bow tie MTR tires I get: -- Total Motor Speed: 35011 RPM -- Theoretical Maximum Vehicle Speed: 51.89 MPH With 9XL (1853 kv) it is: -- Total Motor Speed: 31130 RPM -- Theoretical Maximum Vehicle Speed: 46.14 MPH If I switch it to the e-savage tranny the speeds drop by over 50%, so higher KV motors and gearing changes would be required for that. Im sure the actual speeds would probably drop by about 10% due to losses, so its probably more like 47 mph and 41.5 mph. I would be more than happy with either! |
Cool conversion sofar. My banana is banana is better than your banana though. :intello:
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I typed "is banana" twice! :lol:
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Hahah BANANA REPRESENT!
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They are NOT rollers. You have to buy a roller then use the RC-M Conversion(!!) to make the roller electric... Banana FOR LIFE!
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:lol:
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Umm why cant I edit my first post to update the prices?? I can only edit these last couple posts. Is there an editing limit?
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There's a 24 hour limit for editing posts. You can ask a Mod to edit it for you though. :smile:
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Think you don't get it really...
If you want to edit a post, it needs to be done in 24 hours, after that, only a mod can do it! Greetz, Joram |
Oh well crap.. looks like I wont be upating price list!! Thanks for the info. :whistle:
Anyways... Tierods got here, and I have quite a few things in the mail: -F/R bulks/diffs -Center diff and mount -Chassis braces (to hopefully use as a base to mount the CD onto, got some ideas) -Center dogbones -Radio box (will be cut up to make as small as possible and still effectively hold the servo and reciever) -Kyosho battery trays (site said they had stock when I ordered 4 weeks ago.. apparently STILL on backorder...) Thinking about using this motor as it is incredibly inexpensive. http://www.hobbycity.com/hobbycity/s...hless_Inrunner We'll have to see what the money situation is like when the time comes to buy a motor, a medusa would definitely be nice... |
You can PM the updates to moderators such as BrianG, squeeforever, Serum, Dafni, Mike, coolhandcountry, or myself (hope I didn't forget anybody) to have the first post updated.
Your link isn't working, however, I would stay away from pretty much any motor on Hobby City, especially the cheap ones. They will shortly become expensive paper weights. |
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No bad experiences with Hobby City, but those cheap motors are just that - cheap. I had that same motor, but a lower kv, and with my Savage geared for about 40-45mph (with center diff) the motor cooked itself right up to about 350 deg. F.
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Regardless, I could just use it as a portable grill! |
...Joey I have to sign into this one too :D
...What shocks are you going to be using? Other than that I am pretty sure you have everything in there...The steering assembly comoes with the posts right? I think it does... |
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The steering assembly came with what was in the picture on page 1. What posts are you talking about? It seems to me like I have everything I need. |
Center diff and mount came in today. Just waiting on the chassis braces to begin mocking it all up... Thinking of using lexan to mount on top of the chassis braces (which will be mounted as low as possible) and then mount the CD to that.. We'll see how it goes.
Im going to be extremely busy (2 tests, 1 lab, 2 homeworks due this week) till the weekend comes so i may not have any pics or progress to report until then. |
Bulks/diffs came today, but I realized Im missing the aluminum lower arm braces on the bulkhead... so i couldnt get the lower arms on yet. Heres the progress so far.
http://i181.photobucket.com/albums/x.../bulkheads.jpg http://i181.photobucket.com/albums/x...nny/truck1.jpg http://i181.photobucket.com/albums/x...nny/truck2.jpg |
What esc do you plan on using? I would recomend not taking the cheap road for the motor and esc! Mamba Monster or Mamba Max/bec and try a Medusa for a quality motor on a budget.
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Im thinking about going for the EZRun 150A because its so much cheaper than the MMM. For the motor... Im still leaning towards that $35 9XL motor from hobbycity, a member of e-savage.com uses one and has had nothing but good times with it. I know they run very hot, but I have a heatsink and fan for it so it should be ok. Im on a very tight budget now, and probably wont get the electronics part of this truck for quite a while unless something changes financially.
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...joey you can have my stock ones if you want...they are deannodised and in need of a polish but you are welcome to them..Can send them NOW; literally :D My treat...
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Ok! Ill PM you the address. Thanks so much.
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Shipped!!
...sent with gum about 10 minutes ago :D Got in for the weekend flight so should be there mid to end of next week...I am guessing Wednesday Thursday...Might want to give them a bit of a scrub because there is still a bit of purkle left on them...Good to go Joe :D
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Wait... gum, but no parsley?! :lol: Thanks Bit, I appreciate your willingness to always help.
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Got the braces mounted. The lexan and motor mount are marked up and ready to be cut in the morning at the machine shop. Im ordering new center dogbones that actually fit, so I cant mount the center diff on the lexan until I get the bones to place the diff exactly where it needs to go. Not sure if Im going to use the radio box or not..
http://i181.photobucket.com/albums/x...y/DSCN2386.jpg http://i181.photobucket.com/albums/x...y/DSCN2387.jpg http://i181.photobucket.com/albums/x...y/DSCN2389.jpg http://i181.photobucket.com/albums/x...y/DSCN2390.jpg |
ABRUPT CHANGE OF PLANS AHEAD!!
I have decided to scrap the idea of mounting the CD on top of a sheet of lexan. I ran into big problems: 1) CD cups were going to end up very high above the F/R diff input cups. This would have stressed them too much and may have even caused binding... dont even want to find out anymore. 2) I was coming up empty on how to secure the top of one of the two CD plastic mounts. The huge hole in the chassis where the tranny goes left no metal for chassis braces. It was all going to just be kind of akward anyway on the top part of the mounts. The change: I have decided to use just 4 chassis braces and found a good spot to suspend the CD between the plates low in the chassis. 2 braces on the front CD mount, 2 braces on the rear CD mount (which the motor plate will also be attached to). 3 of the 4 braces will be a direct fit into the chassis I think, the 4th will most likely require me to make a custom motor mount not unlike Bithed's for his HFX. This will allow me to get the 4th chassis brace mounted at the top of the chassis and connect it to the tip of the motor mount. Im pretty stoked about this, I think its going to work better and look much cleaner! |
I got the front CD mount braced in, and Im really happy with how its turning out. The spur gear will hang out the underside of the chassis a bit, but I can make a skid plate to protect it. Before you ask, yeah I know the plastic piece is crooked, it had to be that way to get the screws how I wanted them. There is JUST enough clearance between the cd cups and the braces to be comfortable. Cant wait to get the last 2 braces and finish this up.
http://i181.photobucket.com/albums/x...y/DSCN2391.jpg http://i181.photobucket.com/albums/x...y/DSCN2394.jpg |
Looking good. How much have you spent to date?
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Close to $200.... I anticipate total cost (everything but motor/esc) to be around $230 or so.
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Well I hit the jackpot today. First off the last parts I ordered are in and I think I pretty much have everything now. Driveshafts/dogbones, axle cups, and 17mm hexs came today.
Now, I live on campus at Georgia Tech. I am a senior and next semester I will be in senior design class and have access to this amazing workshop and lab full of goodies. I know they have anything and everything a geek could want for any kind of project, so I stopped by today to see if I could get some scrap metal for a motor plate. I went up to the lab coordinator and before I could even finish saying "Hi, is there any scrap metal I could have for..." he said "Yep top drawer in the blue cabinet." Well much to my delight I open the top drawer labeled "aluminum/copper" and find a JACKPOT of scrap metal. I obviously found the perfect sheet to use for a motor plate, and he said that since Im an electrical engineering senior I have full access to the lab equipment AND power tools any time I want. Were talking a lab and workshop that takes up 3 classroom sized rooms. I nearly shit my pants! He said hed show me how to use the tools when I need them and Im good to go. So it looks like when I have time Ill be going over to cut up the aluminum I got and have myself a motor plate! This lab is so amazing... cabinets full of electronics, tools, scrap material... Spools and spools of bare, insulated, and magnet wire... Cabinets full of batteries, speakers, test equipment... Power tools galore... Lab stations with all the goodies (magnifying lamps, oscilloscopes, soldering station...) Im really looking forward to next semester now! While I was there, a student was working on a RC vehicle that had a sheet of lexan bolted across the chassis (no body was in it). On the lexan was all kinds of electronics - microprocessors, data ports, FPGAs....I started asking him about it and it turns out its a Tamiya Hummer model, looked to be something like 1/12 scale. Dont know exactly what it did as I didnt have much time to talk, but it looked awesome! Anyway, sorry for the huge digression, just thought Id share. I hope to have this build pretty much finished within the next 10 days or so. |
The center is now COMPLETELY finished! I worked for 5 hours in the senior design workshop to get it done.. painstaking measurements paid off, everything fit pretty much perfectly on the first test fit! YAY! I just threw on an esav motor to see how it looked. Since I cant spend any more money I may just run it with the single brushed motor geared way down until the 2 of them burn out just for fun heh... Here are some pics, the drill press I had to use pretty much sucked, so the cuts arent exactly pretty...
http://i181.photobucket.com/albums/x...yisfunny/1.jpg http://i181.photobucket.com/albums/x...yisfunny/2.jpg http://i181.photobucket.com/albums/x...yisfunny/3.jpg http://i181.photobucket.com/albums/x...yisfunny/4.jpg |
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