11 3/4" is the max. wheelbase center to center. It could be shorter.
You can cheat the wheel openings +/- a little on lexan bodies.
Most 10th scale lexan bodies will work. The stampede bodies are to short.
1/4" axles are good. I even use them on my 12# 4wd with 3S.
I use 9 or 10t sprockets, they fit inside 1.5" squ tube nicely.
Your looking for somewhere around 2000 to 2500 rpms at the wheels (at nominal battery voltage voltage, 7.4v for 2S) for a starting point. So gear ratio would change with what ever kv motor you choose.
I think that answers all of your questions. If you have any more just ask.
Mark Damewood
You can cheat the wheel openings +/- a little on lexan bodies.
Most 10th scale lexan bodies will work. The stampede bodies are to short.
1/4" axles are good. I even use them on my 12# 4wd with 3S.
I use 9 or 10t sprockets, they fit inside 1.5" squ tube nicely.
Your looking for somewhere around 2000 to 2500 rpms at the wheels (at nominal battery voltage voltage, 7.4v for 2S) for a starting point. So gear ratio would change with what ever kv motor you choose.
I think that answers all of your questions. If you have any more just ask.
Mark Damewood
BlackMagic
Active Member
Here's where I get mine 
VXB Bearings ... cheaper than McMaster, ServoCity, etc.! Also, get my Class 7 spindle bearings for my mill & lathe here so ... it's very high quality stuff and not those cheap Chinese bearings that last about a year or two and then crap out ... lol.
AVID RC ... don't think you can buy them any cheaper ... $1.00 each :cool (10x for $13.95 ... includes shipping ... crazy low price isn't it)
Hope that helps you out ... good luck with your build ... scratch-built 4x4 is loads of fun ... also don't forget XL series timing belt drive ... much smoother, quieter, and maintainance free compared to #25 chain which isn't roller so it's not a smooth
-BlackMagic Machine & Fab-
VXB Bearings ... cheaper than McMaster, ServoCity, etc.! Also, get my Class 7 spindle bearings for my mill & lathe here so ... it's very high quality stuff and not those cheap Chinese bearings that last about a year or two and then crap out ... lol.
AVID RC ... don't think you can buy them any cheaper ... $1.00 each :cool (10x for $13.95 ... includes shipping ... crazy low price isn't it)
Hope that helps you out ... good luck with your build ... scratch-built 4x4 is loads of fun ... also don't forget XL series timing belt drive ... much smoother, quieter, and maintainance free compared to #25 chain which isn't roller so it's not a smooth
-BlackMagic Machine & Fab-
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BlackMagic
Active Member
Double post
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BlackMagic
Active Member
these ...
Here's link ... http://www.lynxmotion.com/p-591-12mm-hex-mounting-hub-6mm-shaft-pair.aspx
12mm set screw hub - $8.00 per pair ... and you'll need to ream the remaining 0.014" because their meant for 6mm shafting but that's not a big deal when your using 1/4" shafting. Unless your a machinist ... I recommend this method.
I make own from 5/8" 6061 round bar ... cheaper but a time consuming process unless you have a 4 axis CNC mill which can really crank them out but you still end up having to tap holes which sucks :emot15:
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BlackMagic
Active Member
CEN Genesis/Nemesis/GST 7.7 Knuckles and axles ... strong as **** and use CVD type stub axles. You need to machine the ends so they slide onto 1/4" shafting and drill and tap for a 8-32 set screw to secure them to the shafting.
Clodbuster Knuckles .... you need to make a custom axle which has a dogbone end on both sides with pins to drive the stock Clodbuster stub axles. This method is a little more involved.
I'm sure someone here can provide you with pics of a scratchbuilt front end to give you a better idea of what I'm talking about.
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BlackMagic
Active Member
Ran across these pictures on Google ... there just thumbnails so I'm assuming there no longer online but they should help give you an idea where to start.
Click Here
Click Here