Justintime
Active Member
- Messages
- 137
- Reaction score
- 190
- Arrma RC's
Follow along with the video below to see how to install our site as a web app on your home screen.
Note: This feature may not be available in some browsers.
Got rid of my scales a while ago.. I would say twice as heavy as stock. But you leave out the cross pin stays. But by the time I'm done, I'll have a 20lb beast! Hopefully it will still fly ??Whats the weight like..?? Is it a lot heavier than standard..?
Mine gets here Mon. If no one's done it by then I'll weigh it and a stock cup. I can't help you with the HR.Whats the weight like..?? Is it a lot heavier than standard..?
No issues. Sorry to hear that.Justintime
Did you have any problem installing the spur gear? I got mine all put together and got to the last step of screwing on the spur gear but found out the four holes did not match up between the cup and spur gear. They are off just enough I could only get two of the four screws installed. I messed with it quite a bit using different combinations with the screws but could only get two screws in, i could never get two screws to go in opposite each other, Did you have any issues getting yours all put together? Thanks!!
I agree. We shall see!Too bad they didn't machine it to still use the X pin steel inserts. Aluminum wears, so having the steel inserts in there would have made them last a lot longer.
The Hot Racing diff case itself is 14.3 grams, with the screws included from Hot Racing the weight is 16.8 grams. Hope this helps..Interested to know how the weight is compared to the HR version too..
Someone, anyone we need specs..!! ??
Too bad they didn't machine it to still use the X pin steel inserts. Aluminum wears, so having the steel inserts in there would have made them last a lot longer.
Correct me if I am wrong,but I thought I saw on a different thread that there are spacers that go on the outside of the cross pins with these. That would effectively take the place of the inserts. I would hope that they are a good enough quality shim to hold up as a somewhat replacement.Too bad they didn't machine it to still use the X pin steel inserts. Aluminum wears, so having the steel inserts in there would have made them last a lot longer.
X pin design creates a non rotating component. Actualy two. Tekno does it this way also.Yeah, x pin inserts are always awesome... most of the time you can get away without them, so we’ll see.
Exactly, they don't rotate so I don't see it wearing the aluminum much, if at all. It's not like the pins are spinning a groove into the cup. That said, I'd still prefer the pin anchors but we'll see how it works out.Has the internal volume of diff fluid increased like m2c version?
My plastic diff oe setup consistently gets up to 258 F.degrees. then the diff starts to weep oil and sling all over the spur and pinion. Looking for an aftermarket solution myself.
X pin design creates a non rotating component. Actualy two. Tekno does it this way also.
They come with 4 shims. Dry fit was almost perfect. Requires 2 shims on each spur gear to get correct mesh.Correct me if I am wrong,but I thought I saw on a different thread that there are spacers that go on the outside of the cross pins with these. That would effectively take the place of the inserts. I would hope that they are a good enough quality shim to hold up as a somewhat replacement.
Yes it holds more. Space of x pin reduction.Has the internal volume of diff fluid increased like m2c version?
My plastic diff oe setup consistently gets up to 258 F.degrees. then the diff starts to weep oil and sling all over the spur and pinion. Looking for an aftermarket solution myself.
X pin design creates a non rotating component. Actualy two. Tekno does it this way also.
Since it is an open case on both sides versus a cup design, perhaps the spur is indexed to one side only and the other side gets the steel cover opposite side. Just a thought. Try reversing the spur and opposite cover if you haven't already.Justintime
Did you have any problem installing the spur gear? I got mine all put together and got to the last step of screwing on the spur gear but found out the four holes did not match up between the cup and spur gear. They are off just enough I could only get two of the four screws installed. I messed with it quite a bit using different combinations with the screws but could only get two screws in, i could never get two screws to go in opposite each other, Did you have any issues getting yours all put together? Thanks!!
The Hot Racing diff case itself is 14.3 grams, with the screws included from Hot Racing the weight is 16.8 grams. Hope this helps..
My parts got here early. For the stock cup I weighed just the cup. For the Arrma alum. I weighed the body, cover, 1 gasket and 4 screws, (everything that makes just the cup.)
Stock=10 grams
Arrma Alum.=24 grams
The cover isn't aluminum and puts in a good chunk of the weight. Also, it would be that much less weight without those anchors, not that they're all that heavy.So the Arrma alloy cup is quite a bit heavier than the HR version..!!
I would be interested to know if the weight difference between the stock Arrma plastic cup and the two options we now have make any actual difference in acceleration or rotating mass..?
I see the new Arrma cup doesn't use those metal inserts like the plastic one so that's one less thing to wear out.?
Register and gain access to Discussions, Reviews, Tech Tips, How to Articles, and much more - on the largest Arrma RC community for RC enthusiasts that covers all aspects of the Arrma-RC brand!
Register Today It's free! This box will disappear once registered!