BL input needed
 

Hi
Me and a friend of mine are working on doing a BL savage kit, if we come up with a good setup it will be offered to the rc public, most might know my friend as Twisted-Toys. He is trying to put together a kit with his extended tvps or probaly without tvps I'm sure but since he is doing all the fab work I am doing the research part for him. I have read several threads on here so far and got a few things answered but still have some questions I need clarification on.
First- if you stick with the stock tranny and want to use the mechanical brake what all is involved? I read about this mystery "shaft" but seems it can't be bought or find any pics of it. Or is it better to use the esc brakes? I was told you can fry the esc doing this cause you have to use a Y harness?
Second- Is their anything that would be better for a center tranny? THe mad force is kool but parts are kinda hard to come by. Also what pinions are you using with the stock savage spur? I have seen "mod 1" mentioned but I have no clue what that means.
Third- with the stock tranny what is the final gear ratio with the recommended setup?
Thats about it for for the moment, thanks for any input and sorry for any repeat questions in advance but for the quality stuff Casey can produce it should be worth the time for us that want a nice kit and can't fab stuff on our own. :027:

1- if you stick with the stock tranny there isnt much to it. just leave the stock throttle/brake servo for the braking. the shaft i think your talking about lockes it into first gear. i would recommend just locking it in second with some epoxy like poconomaxx did. and yes, a y-harness is required with the mechanical brakes.
2-mod1 is just a metric pitch. examples: 32p, 64p, ect. mod 1 is the biggest and strongest. if you are familiar with 1/8th buggys/truggys or the revo, they all use mod1 pitch gears. i wouldnt use the mad force stuff. the easiest and best thing i think is a center diff. its light and stronger as well as will improve handling.
3-not sure about the ratio but it should be on the forums somewhere.

Thanks for the reply!
What other center tranny are you reffering to?

i would use a center diff not tranny. it would take a little fab work but is worth it. http://i17.photobucket.com/albums/b5...7/DSC01249.jpg
http://www.rc-monster.com/forum/showthread.php?t=1486 thats a good thead to refer to.

Kool thanks alot! By chance do you have this excel sheet I see Serum mentioning? The link he's posted is dead.

You have PM savage03!!

Check this link

Thanks Serum!

Got pictures of the work in progress?

Got a couple, he got a mount made so far. He is trying to find the savage gear ratio, I'm not for sure how to read your charts so maybe its in there?
http://img.photobucket.com/albums/v1...e/3503023a.jpg
http://img.photobucket.com/albums/v1...e/b2e7606f.jpg

Here is one i recognize.

http://photobucket.com/albums/v187/s...&current=8.jpg

This is my mod;

http://photobucket.com/albums/v187/s...t=97fc2923.jpg

done by Rhylsader, (with 4 instead of 2 pins)

Looks good so far, bytheway.

If you use some intelligence, you can read the gearing ratio for both speeds from the calculator.

2nd speed; spur/pinion, 39/23, 29/32, 43/13
1st speed; spur/pinion, 44/18, 29/32, 43/13

Yea I collected those the other night after reading several threads, thought I might need to reffer to those at some time.

lol I don't any intelligence and I failed math :(

The ratio's are in my last post.

Why do you need this bytheway?

Thanks for the gearing chart..! I just have NO experience with Brushless.. So I just wanted to know where to start. This has a lot to do with the design of my mounts and the reduction in gearing will affect what I use a tranny. I think I am gonna scrap the idea of using the stock savage tranny and all that is there. I will use the skid plate as my pan that all the motor and gear box is bolted to and eliminate the tranny, engine plate, radio box, ect.. This is at least 3lb worth of crap..

I am going with my original thought and that is a center diff. Just need to find out if I wanna use one off the shelf or if I am actually gonna make a gearbox.. Thats why I wanted a gearing chart of some type..

I have the TVPs designed for this.. But they are basicaly braces for the pan style chassis it will become..

Now I need to read and see what the majority of guys are using for motors, ESC's, and battery power (lipo).. Then I will design around that for the final prototyping...

Thanks for all your help Serum.. I hear your the man around here.. If you have a good place to start, or need any machining done, just drop a line on me.. mckaseye@yahoo.com

Welcome to the forum Twisted, My guess is that you can get any answer regarding BL.

With a centerdiff, you need a low KV motor, which has quite some torque, leaning towards a 1950, wanderer XL sized can.

But what you could do, is make a slipper and a centerdiff, so the gearingratio is more appropriate for smaller/other BL motors. (just a thing to consider) To tell you the truth, i always admired your work, your low cg TVP's and buggy/savage shocks are great imo.

I am not the man around here imo, i can tell you something about BL savages and about BL etc. but the whole gathering of the rc-monster forum forms a good foundation of knowledge when it turns to brushless, batteries and charging technique.

And Mike (the owner of this site/store) can hook you up with all the BL stuff you need. You need to try running a powerfull setup once, you'll be amazed.

You know i am buikpijn on savage-central?

I know he has the Novak setup right now but I told him that probaly won't cut it in the savage so I suspect one of the xl motors is in the near future for him. I have seen the videos of yours and others on here nad its what got me interested in this. The raw power these things can put out is crazy! Ever since I'd say about mid summer my savage has been sitting on the stand just cause I was fed up with it, put a new picco .27 in it and tons of money and every weekend I went out with friends it would act up and not run at all, at one point I wanted to find the tallest cliff and chuck it :031: SO if Casey can get a setup going I may switch all together, I had plans to have a nitro and a BL savage in my stall but man battery is no much cleaner!

Oh no I didnt know that.. Now I do.. :)

I havent got a BL system yet.. Still want to learn what would be best. Hope to get some help on that from reading and the imput of those that have experience with BL in 1/8th scale MT's...

I am going for the center diff style set up with possibly a slipper in there.. Just need to know the motor and gearing I should base this concept around..

How many cells Twisted? my suggestion is 16-18 cells. that delivers quite some power already.

Cells..? Um, I plan to listen to someone with knowledge of BL becasue I have NONE.. I d know I wanna use lipo if that helps.. but I do need to think about the rest of the world that wants to run this set up and most of them dont want to deal with LiPo..

I know that with the size of LiPo I can put them inside the TVPs and thats a clean look.. but I have some battery trays here to hold NiMh pack on the sides too..

I didnt get a PM or email from ya bud..

you mean you didn't get my reply on the PM on SC?

I don't know if you tried replying a PM or sent me an email or anything, but i didn't received any of those?

Rene... I sent ya a email with some info.. I would like your input before I start milling my new BL savage conversion.. You have a lot of experince and seem like a nice guy.. LMK bud..

Thanks

Casey