Savage BP diffs in revo hybrid or lst case?
 

I think i´m going for the lst diff modification for my Erbe and I´m wondering if there is a possibility that the Hpi BP ring-gear and pinion would fit in either the revo hybrid cases or in the lst cases?:oops:

why would you want to?

because they are very very strong :)

they arent any stronger than the xxl diffs, they are just a diffrent ratio

with a revo transmission you shouldnt be able to kill any properly shimmed 1/8 scale diff

infact i have been racing my platiunum conversion for over 2 years with shimmed stock diffs and i havent had any problems

The BP diffs have slightly larger gears and less teeth per gear. I would think they'd be stronger but the tempering of the steel is the dealie-O on that.

"they arent any stronger than the xxl diffs, they are just a diffrent ratio"

I strongly dissagree,

look at this picture:

http://i33.photobucket.com/albums/d9...1/7a6d40cd.jpg

And this:

http://i33.photobucket.com/albums/d9...1/8af7cf17.jpg

A stock 1/8scale savage diffs Vs BP.... No difference? Looks bretty much more beefy in my eyes:party:

Currently I´m using stock diffs, with alu cups, shimmed properly, no play and no binding.

My problem isn´t that the pinion is "jumping over" a few tooths on the ring gear. The problem is that the tooths are losening from the ringgear..

I have my slipper adjusted correctly, loooose, and I never land with throttle..

Back to the topic, does anyone know if there is a chance that the bp diffs would fit in the losi cases or revo hybrid cases?

I looked at the exploded views of the losi diffs but there was no information on what bearing size the lst diffs pinion and ringgear/cup uses..

If anyone knows the size I could compare it to the savage bearing sizes and see if there was a chance to make this work:whip:

Manne- you showed a side by side comparison of the SAVAGE XL diff and a BP diff, of which yes, the new bp version is stronger.

semipro was referring to a LOSI XXL diff, so your picture has nothing to do with what he said.

I believe his point was that Losi diffs in Losi cases are more than strong enough for a light revo. Whatever diffs fit in the revo hybrid cases are also more than strong enough in a light revo.

So it's much easier to just use one of those methods rather than "reinvent the wheel" so to speak.

I think you got caught up in hpi's marketing. Yes they are called bulletproof diffs but they aren't "the best of the best"

I can't answer whether or not the diffs will fit, I can say it's much simpler and JUST AS EFFECTIVE to use lst diffs or hybrid diffs.

Basically there is no point in doing what you're doing. It's like putting a spoiler on a station wagon.

But if you really wanna do it go for it! Post pics!

Although, may not be "needed" Here on RCM is about OVERKILL. Please post distances between screw holes and outside diameter of the ring gear. And maybe we can get some specs listed on here for both manufacturers.

I am sure Mr. Crash would have liked to know.... Well, now Nitrostarter....

thanks paralyzed you said it much better than i did


as for monster being the home of overkill i agree, but hey its his money......op buy them and make them fit, its that easy

_paralyzed_ "Basically there is no point in doing what you're doing. It's like putting a spoiler on a station wagon." Haha Thanks for the reply:yipi: Maybe you are right :yes:

And I know that he meant losi xxl diffs, but I thought they had the same pitch ( or very close to the same ) as the savage xl diffs and other 1/8 scale diffs except the CEN monster and Hpi bulletproof diffs, I´m sorry If I got it wrong. I just thought it was a good camparision picture.

I am not fooled by hpi's marketing, there is always something else for another amount of cash that is better, or better suited for the application. But after alot of reading in alot of different forums I couldn´t see any stronger diffs really...Maybe UE has something but that is not an possibility.

I just wanted to make it as good as possible when I´m at it... Mistercrash destroyed several diffs in his xxl Losi.. Yes I know that is one HEAVY truck, but hey I want to run 5s with pretty big tires and the slipper tight... I bash very hard in sandpits and I´m doing things that puts alot of strain to the drivetrain, I´already at to change my summit shafts for losi lst dogbones and axels

( trying to finish Mc´s tip :

http://www.rc-monster.com/forum/show...&postcount=655 )

If someone has a better suggestion please feel free to speak, Semi Pro, "as for monster being the home of overkill i agree, but hey its his money......" Stop being so negative and help me instead:rofl:

You are saying that the lost diffs will be more than enough, maybe you are right, but I am concerned because I have read about people who had done the Lst mod and haven´t had any differential issues what so ever after and that is good, but... There are some people who runs the stock diffs just shimmed for more then a year without issues... It all depends on the drivingstyle and setup of the truck..

I can use the stock diffs with small superlightweight truggy tires for many many hours of hard driving without problems, but as soon as I slap on some bigger tires for more groundclearence and more gyro effect when I´m at driving in the sandpits....Bye bye stockdiffs:whistle:

I have been thinking of getting Lst diffs and run them to see if they are enough for the application.. But if they aren´t, then I have throwed out alot of money for something that doesn´t work.

I have learned one important thing from this hobby over the years, Do it right from the beggining, don´t "cheat"

So if someone has a Lst with the diffs open, feel free the meassure the bearings:angel:

What dimensions did you want?

im not being negitive im being helpfull, my lst xxl is on 12cell with stock diffs and no problems:lol:

but its all good, like i said buy it, we dont learn anything new without someone takeing a risk

whole lst diffs and aluminum cases can be had for $15 on ebay. Not a bad investment.

I have a savage and lst diff here but can't get out of bed.:oh: Sorry!

Looks like I have to get a e-bay account then!

pinkpanda3310, Thanks alot:angel:! Can you give me the meassures of the inside of the pinion bearings and the inner and outer size of the other two bearings? :yipi:

Should we call the outside of the pinion bearings 16mm? or is that some wierd size in inches or something? :whip:

Semi Pro, I read your thread before if I remember right, For how long have you driven the truck on 12s? :yipi:

How many different versions does losi have of their raminator, Lst, XXLst, and lst2 differentials? Wich ones should I stay away from and wich ones comes with alu cups and wich ones has tiNi gears, magic mushrooms, hidden ferraris and other good stuff in them? :party:

Edit:

I think I´ve got it now, they come with non TiNi gears, a plastic cup and outer aluminium housing, so, where are you guys and girls buying alu cups?
:party:

Edit2: I found out that the pinion shaft is 8mm ("Big bearings for the pinion, which has an 8mm shaft" http://rc-monster.org/forum/showpost...00&postcount=1 )

So the pinion bearing is 8x16mm... Time to check the bearing size of the Savage Bp pinion:surprised:

Edit3: .........Bp pinion=8x16...:surprised:

We might have a go here! But I think I will wait with this whole whing until mike gets some hybrids out again:neutral: Can´t wait!

Now we just need someone to meassure the Hpi BP diffs like this: http://www.rc-monster.com/forum/atta...1&d=1288097619

And then we will know....:gasp:

All the bearings in the pic are the same 16mm OD, 8mm ID, 5mm wide. The alu cup is from novarcproducts.com. The TiNi gears were from sportwerks but losi have their own now.

Thanks alot. Any advantages of the sportwerks over the losi? Or are they similar in quality and durability?:whip:

Edit, just found out that the sportwerks and losi are pretty much the same... http://rc-monster.info/forum/showpos...6&postcount=36

Or, best option, buy a savage :mdr:

Don't know if there is any difference :neutral:

Pinkpanda: look at my edit:yipi: I think I´ve got it figured out:lol:

Freeze: :rofl: How many times a day do you think that popps up in my head?:lol:

I want to change, Muggydude seems to bee very happy with the change from Erbe to flux ( among with many others ) and it looks to me like you are happy....and.... I WANT ONE:whistle:

Yep!:party: I love my flux, and it's not even all that upgraded. Very durale and fun truck. 4s is awesome, and 6s is insane! Also a good winter vehicle becase the TVP design is super easy to waterproof.

Glad to hear that Muggy!

Tell me a short story, for how long did you have the revo? Any previous Rc cars?

Should I simply do it? Turn...From Traxxas to...Hpi?:surprised:

i have both a revo and a savage. there is just no comparison. the revo handles a little better, but i have to baby it a little in both power and bashing. the savage is a balls out, insanely tough truck that has no power limits due to the BP diffs. i've done at least 100 standing backflips with mine and no diff issues yet besides a screw backing out from user error.

"i've done at least 100 standing backflips with mine and no diff issues" That is some serious abuse:yipi:

I´m glad you shared, that was something I was looking for, not that someone have done 100 standing flips, but that someone is pushing the limits with good results:intello:

What do you think is the most common to break on the revo besides the whole drivetrain?

I have running revos since the first 2.5 came out I´m just wondering if the rest of you guys are breaking the same parts as me?:whistle:

I found out that if you have the following you got a good base:

Alu chassis ( the plastic one isn´t enough for me, keeps cracking in the most wierd ways..)

Alu rockers,

"thick" rodends all around,

Alu shock caps,

Alu shock retainers,

Alu skids front and rear, and something who ties this togheter like a sandwïch, or HR titanium fullskid or similar to prevent bulkhead snapping.

All the small "mounts" in the front that the servo saver sits on and similar in Alu.

Other driveshafts ( currently summit shafts )

Other diffs/cups/non plastic parts.

I have all this done among with a bunch of other small mods. So now I thought that when I had put so much job on it I could just beef up the last thing that keeps giving in, the stupid diffs, the summit shafts is holding up pretty good.

I have a special love for the revo platform and for Traxxas, it feels like I´m going to the devil if I turn on Traxxas and starts to run Hpi:diablo:

Is there no one who is rebuilding who can meassure the BP diffs as requested?:angel:

What measurement did you need exactly?

If I remember I might do it tonight since I'll probably work on a nitro (I know, I know sacrilege) Savage rebuild that BP diffs are going in (saves the need to keep different sets of spare parts for multiple Savages).

Used to be able to get both the 43T and 45T Sportwerks TiNi gears on Ebay for like $8-10. Now the 43T is up to $24, but the 45T is still $10. I was mad when I bought a few of the 43T, then went back to buy more because they were such a good deal, and saw how much the price went up.

thzero:

Like this: http://www.rc-monster.com/forum/atta...1&d=1288097619

Would be very kind if you could do it :).

simplechamp:

Thanks for the heads up! I will look out for them.

http://lh5.ggpht.com/_dcy74CG15Qk/TM...0/IMG_5083.JPG

http://lh5.ggpht.com/_dcy74CG15Qk/TM...0/IMG_5085.JPG

So it looks like they are 5mm too wide.

I had the revo from about christmas to maybe august last year? It started out as a normal revo conversion with regular chassis and a 2650kv motor. I ran pretty much the whole time, upgrading as I went. It did handle good, and I actually hardly ever broke it! (1 a-arm and a steering knuckle). I mostly did little stuff ith it though, like going to the track and socker fields. i also went to the skatepark, but I had excellent control, so it almost always landed on it wheels on a curve. So no thrash it. I feared that if I did, it would break. It really was more of a racer. No on my savage, I go to the skatepark, and the jump the 10 foot tall fence! It is just a lot more "fun" truck, even on 4s. Standing backflips are sweet! More power than you need is definetely better than less power! Only thing I have broken so far is the center dogbone (snapped on a curb standing backflip) a turnbuckle (fixed with integuy rear carriers), and my crappy RPM wheels. Tht's it, after numerous thrashings. Love it! Very durable truck, a ton of fun, and the best part is: it cn handle the power! Now all I need is 6s...:diablo:
Check my build thread if you want to see all the upgrades on it. Most of them I believe are very important.

Thzero:

Thanks alot for meassureing the diff! 32.74mm VS 34.74mm, looks like 2mm difference:yes: I will make it fit. I´m wondering if the Bp ringgear have the same bolt pattern for the diffcup as the lst...? If that is so, then I could just use the Lst cup:whistle:

Muggydude:

Thanks for the writeup! I just keep hearing good things about the flux over and over again, I don´t think I have seen anyone who has been unpleased with it yet:yipi:

I have read your thread :smile:

Is there someone who can meassure the distance between the screws for the Lst cup and savy cup?

LST = roughly 18mm square , 26mm diagonally

ROUGHLY

Thanks panda:yipi:

And now the Bp meassures someone?:lol:

18.5mm square, 25.75mm diagonally

Thanks alot guys! That will do, it will work with some will:yipi:

I won´t do this right now, but I will post here when I get it done:party:

I have ordered some lst diffs now, and I have some savage diffs right here on the table...Just waiting for the diffs to drop in.:yipi:

Well, I didn´t have Bp diffs here, it was some savage x 4.6 diffs, they have a higher tooth count than the BP diffs butt since the BP diffs have bigger tooths I think the final size of the ringgear is similar, It´s simply a much bigger gear than the gears that the lst diffs are using.

So... I simply shimmed and installed the Lst diffs with some steel dogbones and other goddies, I´m running my slipper completly locked and after 20hours we are still going strong :).

And I didn´t have to remove much material from the bulkheads at all, where the material is removed isn´t were I use to snapp my bulkheads anyway.

Just a small update.

The diffcup from the savage fits on the lst cup and vice versa, the only difference is that the lst cup is sligthly slightly shorter, maybe it´s a good idea for people that is stripping the intrenals on their fluxes to use a lst cup, and for the Lst owners that are stripping internals to use savage internals instead since they are a bit thicker and would make the gearmesh tighter.

I didn´t mount it all up tho, so I´m not 100% sure that it will fit, but I thought it might be a good idea since you have a limited space to shim the internals on because of the pin that the gear sits on on the output.

@ Manne:

Can you please post a picture of the diff-case with the Savage internals.

I want to use the diff for a savage trophy truck build.

Thank you
Regards, Andreas