The Strongest Savage Diff Compilation.

[Jahay]

thanks for chiming in mothman... The Hotbodies internals do seem chunkier that the stock savage gears...

i was very close to just giving up and making do with the 10x16mm bearing on the savage alloy cup...
Im going to try and find a nova cup, but postage for two cups is $30 from a guy on ebay!

Ill see if i can find them else where!

[JasonB]

Here's a link to the Nova RC cups on e-bay (link) Works out to $22 for 2 shipped.

[simplechamp]

I think Jahay is in the UK so that would explain the expensive shipping. For him it might make more sense to use the IRC cups even if the alloy is softer. Have to look at the cost of shipping the Nova vs. the cost of replacing the IRC sooner. I think Nova does most (if not all) of their sales direct through Ebay and their website, so you might have a hard time finding a UK distributor.

I have both the IRC for F/R and Nova for a center diff. But haven't tested either of them yet so I can't comment on how big the difference is between the two alloys. I'm pretty sure I remember a post from RCM Mike, when people asked why he used 6061 to make his mounts and not 7075 he said 6061 (not 6082, but very similar) is generally more than sufficient for many RC applications. And as far as the hard-coating, I'm not convinced that it would make a big difference either way.

There is no doubt the Nova cup uses stronger alloy, but the question is how much of a difference will it make, and is it worth it (for Jahay at least) to pay the international shipping. $30 is just shy of the cost of another whole set of 3 of the IRC cups (and they include cross-shafts, gaskets, o-rings, etc.)

[JasonB]

Ah, that splains it. I am curious to hear how these Nova and IRC cups hold up. If they do, word will spread, just like it did when CEN diffs were the ticket, and those things will sell like crazy!

If my plastic cups don't cut the mustard, my next step will probably be the Savage ring gear match drilled to fit a CEN cup or the $15 Boca bearing on a stock cup.

[Jahay]

yep champ hit it right on the head there...

i think i am deciding to stick with the IRC cups as i can get 3 for the price of two nova cups...
BUT THE PROBLEM IS ... irc said it will be a few weeks before they have them in stock!!!
No biggie i hope, i have a lot to do on the truck anyway... But i will be running the Hotbodies inteernals, and hopefully they will work perfectly without any shimming whilst using the BP Ring gear.

[ZippyBasher]

on the Nova Cups. $6.50 a cup>? WTF! I just got one like a month or 2 ago and it was $18. I literally just bought 3 more LST cups. Glad I stopped in this thread.

BTW the Nova cups are damn sweet. If shipping is too $$ just buy a couple extra and sell em to get some $$ back.... @ 6.50 you can tripple your money back...

I did a CD mod to my Maxx and I used an LST Nova cup and 8ight-T Spur... It has been holding up fine for the first month... (EDIT on 6s with a 1717 and my ride is ~13lb)I cant say for sure that it will be an end all cure to stripped diffs, but I will say that I trust them more than the plastic cups. as you can see what I mean here: http://www.rc-monster.com/forum/show...t=28180&page=2

I will put one on my 8ight buggy CD and the Maxx' F/R diffs now as well.

[FG101C]

Could have swore I posted that I had three nova cups in my Losi 8T, with about three years of hard running and they are still fine.....

[mothman]

Originally Posted by ZippyBasher

on the Nova Cups. $6.50 a cup>? WTF! I just got one like a month or 2 ago and it was $18. I literally just bought 3 more LST cups. Glad I stopped in this thread.

BTW the Nova cups are damn sweet. If shipping is too $$ just buy a couple extra and sell em to get some $$ back.... @ 6.50 you can tripple your money back...

I was shocked too when I saw the price on ebay. but then i notice that the type of aluminum has been changed to 6061-t6 instead of 7075-t6.. perhaps the price is reduced because of this? i already sent them a msg asking about this. will update once i receive the reply.

[simplechamp]

Originally Posted by Jahay

hopefully they will work perfectly without any shimming whilst using the BP Ring gear.

All you can do now is pray, may God have mercy on your soul...

[FG101C]

Didn't notice they changed the type of aluminum.

[JasonB]

Originally Posted by FG101C

Could have swore I posted that I had three nova cups in my Losi 8T, with about three years of hard running and they are still fine.....

Yea, you did mention having a Losi Truggy. I didn't have a clue about Losi models and wasn't sure specifically which one you had. Just googled the 8T diff cups and they are indeed very similar to the Savage ones. The sleeves on these cups that the bearing sits on are 1mm thin. It amazes me that the 7075 alloy can be milled down to 1mm and still handle the kind of stress these monster trucks dish out . . . WOW!

I'm sold FG101C. So far so good on my plastic cups, but as soon as I ware those out, I will try the Novas next . . . if they start using the 7075 again. Check this out: (link)

[FG101C]

I think you will like them, I'm going with the stockers for my build and upon detonation I will probably do the nova's with HB internals, or unless you find and even more reliable diff setup.

[Jahay]

So Guys... damn i wish i was on the same time schedule as you lot so i could get involved... anyway...

Nice find mothman... i didnt realise the hellfire cups on the bay were made out of the usual alloy and not the hardened stuff.. hmmm... more incentive to just buy from the UK now...

So are we saying that the lightning alloy cup from the IRC site is basically identical to the hellfire nova cup???

I was more swayed by the IRC cup now as it comes with new cross shafts ( i dont want to use my old savage ones) and new o rings etc.... (i know these are minor things to buy, but over here in the UK, a pack of or rings and cross shafts can cost an extra $10+ postage!)

[simplechamp]

Originally Posted by JasonB

The sleeves on these cups that the bearing sits on are 1mm thin. It amazes me that the 7075 alloy can be milled down to 1mm and still handle the kind of stress these monster trucks dish out . . . WOW!

If you think about it though, they don't have to be very thick. The inside bore is filled by the outdrive shaft, and the outside is supported by a bearing. You might be able to crush the sleeve easily with a set of pliers, but try doing that with an outdrive in there and you can't. The joint where the sleeve meets the rest of the cup is probably most at risk of failure.

Hopefully Nova RC switching to 6061 is a good thing. Maybe it means they tried both alloys and found the 6061 is plenty strong enough, and it's cheaper so they can pass savings on to the customers. I don't know how long ago they switched, but I'm pretty sure the nova cup I have is the 7075 as I bought it quite awhile ago.

But yeah Jahay, I'd say IRC are definitely the way to go for you, especially with Nova now using 6061. Not sure on how the Hellfire cups compare to the Lightning Stadium cups. All I know is Jammin, Kyosho 777/ST-R/GT platform, and HotBodies LSP/D8/D8T are all basically the same.

[JasonB]

Originally Posted by simplechamp

The joint where the sleeve meets the rest of the cup is probably most at risk of failure.

That joint is specifically the area that I'm concerned about failing because it already failed on me twice with my home brew milled down Savage cups after only a few runs. But FG101C has had very good success, so Nova must have figured out a way to reinforce that joint.

I've already got more run time on my plastic cups then I was able to get out of any of my stockers though, so it's all good! And the price was right, got 4 of the HB cups shipped to my door for $20 off eBay. I'm also running the $3.90 8x16 Boca Ceramics to further reduce maintenance needs. The 10 packs are the way to go!