Vorza/Savage BP diff How to

Questions about Hop Ups for the Savage.

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Brevis
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Re: Vorza/Savage BP diff How to

Post by Brevis » Sun Jun 17, 2012 2:40 am

Was thinking of upgrading my diff to this on my Flux XL, but if you are using the ring gear from a savage, then you have to use a 10mm bearing on one side? The bearing slides over the ring gear (if i remember correct) so unless you grind alot of material of the ringgear, then an 8mm bearing wont fit?

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mothman
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Post by mothman » Sun Jun 17, 2012 5:17 am

[quote="Brevis";p="843402"]Was thinking of upgrading my diff to this on my Flux XL, but if you are using the ring gear from a savage, then you have to use a 10mm bearing on one side? The bearing slides over the ring gear (if i remember correct) so unless you grind alot of material of the ringgear, then an 8mm bearing wont fit?[/quote]

The new bulletproof ring gear comes with 8mm shaft for the bearing to sit on.

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Brevis
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Post by Brevis » Sun Jun 17, 2012 8:58 am

Ah I see whats wrong now. I changed the bearings on my BL converted XL yesterday, and it had the 10mm bearing on both sides. I assumed the XL diff was only made in the bulletproof version.
By looking at the Flux HP manual, I Can see that the ring gear is another type than my XL has equipped.

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LLkoolskillet
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Post by LLkoolskillet » Sun Jun 17, 2012 9:49 am

BP diffs have a 29t count with a 9t pinion
[img]http://i1105.photobucket.com/albums/h358/LLkoolskillet2/skillet1.jpg[/img]

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xtremesavage
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Post by xtremesavage » Sun Jun 24, 2012 10:06 pm

If your diff had 10mm bearing on both side's,,it has to be an old 21 ring gear,,HPI did make a 43t ring gear with a 10mm bearing on early savage's..

You need to upgrade them.
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Post by _dV_ » Fri Jun 29, 2012 7:17 pm

I was attempting this mod some time ago here
http://www.savage-central.com/modules.p ... 531#813531

I ran into the problem that the Vorza cup was wider than the stock flux cup and wouldn't fit into the bulk even with the 2 shims on the opposite side to the crown gear removed(see post pic). Seems I was using the same parts as this mod. Can anyone point out where I might have been going wrong?

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Post by savagenitroflux » Fri Jun 29, 2012 8:40 pm

Some time ago i bought Nova RC cups and did up my bulletproof diffs.

The sweet part about it is that they're alloy and if you buy the cups sold for the Hellfire, the savage ring gears fit and it takes the bigger bearing on the cup side so you eliminate the smaller problem maker.

think i'll try these Vorza internals on my next diff maintenance (even tho my savage internals have held up fine).

cool mod LL.nova diff cups

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LLkoolskillet
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Post by LLkoolskillet » Fri Jun 29, 2012 9:44 pm

My diff when installed into a new bulkhead was a super tight fit. Thus why I took the 3rd shim out. Not with that being said just remove shims on the cup side until it fits. Remember tho you don't want your mess to tight or the pinion will wear into the ring gear. It won't destroy it just takes material away. I can personally say that it still holds up to 6s power 40mph back flips. That is the ring gear of course. If you have the mesh to tight

If you have to remove all the shims then I would recommend shaving the top of the diff housing down a bit until you can add one shim to the ring gear side
[img]http://i1105.photobucket.com/albums/h358/LLkoolskillet2/skillet1.jpg[/img]

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Post by xtremesavage » Sat Jun 30, 2012 12:38 am

I beleive the hellfire cup requires alot of shimming to fit,,But it absolutely fits.
I dont think you can get them anymore,,Isnt Nova out of bussiness?
All those cups are out of stock either way,,everyone one of them.
[img]http://i338.photobucket.com/albums/n403/xtremesavage/newsig.png[/img]
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Post by _dV_ » Sat Jun 30, 2012 3:40 am

LLkoolskillet:
Did you use stock Flux bulks?
How many shims did you use on each side and what size were they?

I used the 2 stock Flux shims (0.2mm) on the crown gear side to keep the mesh correct and no shims on the opposite side as per below. If I remember correctly there was no way this configuration would fit in the stock Flux bulk.
Image
Last edited by _dV_ on Sat Jun 30, 2012 11:03 pm, edited 1 time in total.

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Post by savagenitroflux » Sat Jun 30, 2012 6:27 am

[quote="xtremesavage";p="844647"]I beleive the hellfire cup requires alot of shimming to fit,,But it absolutely fits.
I dont think you can get them anymore,,Isnt Nova out of bussiness?
All those cups are out of stock either way,,everyone one of them.[/quote]

i put a link up in my last post.  looks like he's selling his business (which is too bad b/c he makes some good parts).  the hellfire cups didn't require any shims when i had them in my gh alloy bulks and maybe 1 or 2 in the flux bulks.  they're identical to the savage cups with the exception that they use the same size bearing as the ring gear.

you can still get lucky and find nova products on ebay here & there.  FLM could easily make them; just change his existing design to accept the larger bearing & i bet he would if someone wanted them and called him.

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Post by LLkoolskillet » Sat Jun 30, 2012 7:12 am

[quote="_dV_";p="844651"]LLkoolskillet:
Did you use stock Flux bulks? How many shims did you use on each side and what size were they?[/quote]

I used stock flux bulks. I have 2 shims on each side so 4 total for each diff. Now I did find that one shim had to come off on the ring gear side because it was over shimmed.

Anyone else considering this mod, please note that how many shims I used will be different from everyone else. No two bulkheads are exactly the same size...dimension wise where the diff sits. I have noticed this on many bulks. A used bulk has been broken in sorta speakin so the diff will fit in there with more shims. Where as a new bulk will require less shims. So shim accordingly!
[img]http://i1105.photobucket.com/albums/h358/LLkoolskillet2/skillet1.jpg[/img]

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Hakka
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Post by Hakka » Fri Jul 06, 2012 4:15 am

Great tutorial LL. Them teeth look like they could saw a tree down! Might need to do this when i pick up one of Robins Picco's!
[img]http://i1066.photobucket.com/albums/u406/NizmoBrum/sigcopy.jpg[/img]

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Post by Brevis » Mon Jul 09, 2012 12:29 pm

Just got my modified cup and ringgears back from my friend at work :) now it's lathed/grounded down to 8mm on both sides (standard 43tooth).
I just assembled them, 2 x 0.1mm shims on each side of bearings, one 0.1mm shim on the inside and 0.3mm on the outside of the drivecup located on the cup-side.

They fit perfectly in the housing and the woble in the cups is almost shimmer away :) looking forward to trying it now, crossing fingers for more than 10 minutes runtime :D

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Post by Scottmh » Tue Jul 24, 2012 9:06 pm

so does anyone have a complete part number list of the parts you need to do this to a savage 25?

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Post by Gsflux2350-2200 » Wed Aug 01, 2012 4:37 am

I did this set up. I originally had some issues with stock diffs and same issued transferred to this set up.

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Post by J1A1H » Wed Aug 01, 2012 6:42 am

Great detailed thread! Thanks for taking your time to put this together!
I can stand by this! I did this for my 9s savage and the diffs have never sounded or operated better!

Should be a must do mod!
Josh

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Post by LLkoolskillet » Wed Aug 01, 2012 2:17 pm

Thank you, and I agree this mod is a must along with the BP three speed. All 3 of my savages have this diff and I have not had any diff failures. Not to mention when I refill the diffs the bearings look and feel brand new.

4 gallons on my nitro record breaker XL
25+ packs thru my CD XL Flux on 6s
2 gallons/ 5 packs(4s) thru my other XL flux.... Was nitro before conversion

I have crashed my Blackout XL at over 50mph many times and the diffs look brand new
[img]http://i1105.photobucket.com/albums/h358/LLkoolskillet2/skillet1.jpg[/img]

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Post by savage-rocks » Sun Aug 05, 2012 1:39 pm

[quote="Gsflux2350-2200";p="847265"]I did this set up. I originally had some issues with stock diffs and same issued transferred to this set up.
Savage Flux: Desertboy-17 ext.TVP's,Hitec 5645mg,Mamba Monster, LST Tires&Shocks.
Clodbuster:Custom 1/8 frame,ball diffs,Straight Rear axles,Hitec Ti 300oz servo,Dual BL, Imex kong tires.

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Post by SUPR-GLDE » Tue Aug 14, 2012 4:49 pm

When shimming does a Guy have to shim on the inside of the bearing or would it be safe to shim the outside like the vorza diff's came in the housing's

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