CD's for the savage? - RC-Monster Forums

Nixpus · **CD's for the savage? -** 01.14.2011, 04:20 PM

Hi guys,

Tried to update my old build thread with the question but didn't really get the results I was hoping for.

Thus I'll whip up a thread of its own for the question.

Which CD's are fit for a Savage? Pros, cons, cost, availability, range of spurs available, etc, etc... :)

The one Ive come across quite often is the ofna spider... but I cant find it on ebay and I cant really see which spur gears it can be fitted with?

What about some of the other CD's? Losi 8ight CD? Jammin X2CR Pro bla bla? others? Could a few of the "pro's" please shed some light on the subject for a poor guy who have never played with 1/8 buggies :)

Cheers!

_dV · 07:28 PM

Ofna spider availability seems a bit low but it has the strongest internal gears. I'm using a Slipperential atm which I don't recommended for a Savage as the slipper part isn't really up to it.

Looking to try a Vorza\Hot Bodies CD which i bought fairly cheap on ebay. There are a good range of spurs available for it, I have a Hellfire 52 tooth lightweight spur on it.

I saw that you posted about an Ofna center slipper. I'm really starting to think that i don't need\want a slipper at all in the center and they always seem to be troublesome. I have the slipper locked up on the Slipperential atm and using Ofna silicon diff lock fluid in it. This provides a near locked up CD driving experience but when landing on one end on power allows some power to the redistributed to the other end of the truck instead of instantly shocking the drive train. No drive train breakages for me yet.

Nixpus · 01.15.2011, 07:29 PM

Roger roger! I hear what your saying about the slipper ;)

not a bad idea with the hellfire spurs... 51-53 tooth spur could work just fine with a 1600KV motor :) But will supply last? seems the Hellfire is discontinued.... Hmm ok the Trophy 4.6 has a 50 tooth spur. Still a few more wopuldn't hurt.

Thank you for the info DV

Nixpus · 01.17.2011, 05:22 AM

Have placed a bid on Ebay for a Vorza CD.

The CDs from different suppliers are interchangeable right?

The reason why I ask is that one of my colleagues whom are producing alot of CNC parts for the projects would like to join me in the hobby... thus I think there is basis for some slighly more advanced custom parts than what I have been able to whip up on my own! But Id hate to ask him to make something fancy for the Vorza and then find out that the Spider or one of the Torsion versions is what we really need/want ;)

Another part Id love to try making with the CNC is the "wide knuckle" I was asking about in another thread...

thzero · 01:49 PM

Not necessarily, no. You'd have to get a bunch and do measurements. Now the Vorza diff is used in the Vorza, Hot Bodies D8/D8T and most of the Stadium line from Hot Bodies. The ring gear even works with the HPI Savage X diff cups. Think the Savage X diff internals are the same as on the Vorza/D8/D8T/Stadium but not 100% sure as they have different part numbers.

But the diffs out of my RC8T are slightly different size to diffs in the Savage X.

As a note, they bearings are probably the most important part though really as far as mounting the CD goes. The length dimension may differ slightly but the vehicles I've dealt with have the same outside bearing size (Savage, RC8/RC8T, Stadium and D8 diffs); believe they are all 8x16 bearings.

Quote:

Originally Posted by Nixpus

The CDs from different suppliers are interchangeable right?

What is the point? Yes, the XL axle and other extends place more load on the outside bearing, but it fails just replace the bearing. I suppose you could construct a "wide knuckle" that actually extends the wheel out farther, but thats just really increasing the width of the track, which is helpful, but doesn't increase the suspension travel at all either.

Quote:

Originally Posted by Nixpus

Another part Id love to try making with the CNC is the "wide knuckle" I was asking about in another thread...

Nixpus · 01.17.2011, 06:12 PM

Too bad about the CD's... but hey then I stay in the HPI family ;)

The point is to have less vibration given the smaller angle of the vibrating axle. I know that I could change bearings at a regular basis... but whats the point if I could have fun constructing something better over the vinter?

thzero · 01.17.2011, 06:20 PM

Go for it then! :) Better though would be new longer suspension arms!

Quote:

Originally Posted by Nixpus

The point is to have less vibration given the smaller angle of the vibrating axle. I know that I could change bearings at a regular basis... but whats the point if I could have fun constructing something better over the vinter?

Nixpus · 01.19.2011, 11:24 AM

Im going, Im going ;)

My toolshop buddy started dreaming outrunner direct drive to the diff's today... any motors fit for a Savage XL conversion of that sort (with all of the odd ends it has - rollout, cogging, lack of gear adjustment when you swap wheels etc...)

Im thinking that the OKhobby/infinite 1/5th scale ESC could be an ok HW ESC choise? At least the voltage is ok ;)

For my own Savage I am still going with the CC-Neu 1717 and a CD...

thzero · 01.19.2011, 12:11 PM

Do a search in the forums, I do believe someone did a outrunner direct drive conversion either with the Savage or a truggy.

Nixpus · 01.20.2011, 05:16 AM

Ive done the searching.

Something like this: http://hobbyking.com/hobbyking/store...idProduct=2097 on 8s should hopefully be able to opperate in a Sav XL size MT. Will not go for wheels bigger than stock flux.

I was just wondering if there was a new kid on the block providing better motor options for a direct drive Savage than the hobbyking? :)

Will follow the OKhobby 5th ESC thread in the brushless forum.

JERRY2KONE · **I believe -** 01.20.2011, 06:01 AM

Quote:

Originally Posted by thzero

Do a search in the forums, I do believe someone did a outrunner direct drive conversion either with the Savage or a truggy.

Yea I believe either SSSconcepts, Sikeston, or maybe Lincpimp have done outrunner direct drive projects in the past few years with some level of success. With so many choices in brushless motors now I don't really see the point of using an outrunner though. Unless you just have one laying around and want to use it in something. The CC 1717 should do just fine if your looking for ultimate power. Good luck with your quest.

Nixpus · 01.20.2011, 04:16 PM

Ended up with a HB Center Diff... seems to be identical to the HPI one (surprise...)! Spurs go up to 53 which gives alot of room for gearing adjustments :)

Only worry I have is that the housing looks like plastic!? Hope its black anodized (or how you spell that in english) aluminium.

Will construct the mount a bit assymetrical to get the 1717 as low in the Chassis as possible.

************************************************** ****************

The outrunner direct drive project is my colleagues. Would like to go high voltage / low kv. I suggested this motor: http://hobbyking.com/hobbyking/store...idProduct=2097 and the okhobby 1/5th ESC... then he could run 40-45 on 6s and 65ish on 9s ;)

He has some pretty good ideas for a transmission "shock absorbtion system".

By the way... wouldn't it be possible to have reverse with a cluth setup? Hmmm but you cant motor brake... right? Not a good idea.

thzero · 01.20.2011, 04:36 PM

No, its plastic. You can use a Savage X diff cup instead though.

Quote:

Originally Posted by Nixpus

Only worry I have is that the housing looks like plastic!? Hope its black anodized (or how you spell that in english) aluminium.

Bmr4life · 02.04.2011, 05:50 PM

Keep this updated, I'm wanting to put a CD in my DB17. I hate how bad the savage drives compared to my buggy and truggy.

Nixpus · 02.04.2011, 06:10 PM

Will do... just waiting for bits and pieces to arrive from the US chop shop to Denmark :)

My toolshop buddy began the wide knuckles... made a true wide knuckle for the front and a wide hub+knuckle for the back to eliminate the tie rods and slop in the rear end.

Sounds like I should get an IRC cup for the CD btw? http://www.innovative-rc.com/lightni...ver-p-209.html

Im debating if I should try to do something like the KD direct drive with a CD or mount the motor like Jahay on the side of the TVP. The later seems really easy to adjust.

Also I am debating if I should try to fit 1717, CD and 2x5800mAh Tunigys within the standard XL TVPs, go with larger TVPs or alternatively settle with battery boxes and the weight adjustability they bring to the equation...

Updates when I have progress to show or questions to ask :)

Keep on truckin!