My Flux XL conversion with 1717 and center diff

Not your average Savage Hop ups. These are highly modified, with some home-made parts.

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s2022
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My Flux XL conversion with 1717 and center diff

Post by s2022 » Mon Jan 23, 2012 2:02 pm

Have been enjoying the RC for less than a year now, this forum has provided a lot of insight to the hobby through its members and their great conversions, tips and experience. I feel I need to return something back by posting my humble conversion.

lots of ideas have come from different conversions and forum members, a thanks to all.

It started with the need for more power and a center diff. I pefered to do it the custom way as much as possible. And obviously castle creations sale; got my self a 1717. well and tried to save some money.

I got the
Last edited by s2022 on Mon Jan 23, 2012 3:19 pm, edited 1 time in total.
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Post by s2022 » Mon Jan 23, 2012 2:58 pm

Some more views before how i am starting my build

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this is where i plan on mounting my esc

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this is how the motor will be adjusted for meshing the pinion and diff spur

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mechanical brakes, i still haven't sorted it out yet, will get the motor and center diff in, then figure out the brakes.
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Post by s2022 » Mon Jan 23, 2012 3:06 pm

cut the alum pieces, 3mm for the sides, and 6mm thick for diff top and bottom plate, also 6mm for the motor support plate.

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relocated the servo, got rid of the rx and huge servo box.

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checking some clearances, double checking the 3d matches the actual progress. especially screw locations.

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Post by Roost » Mon Jan 23, 2012 4:28 pm

Awesome man. is that a idler gear on the center diff?. center diffs are definitely the way to go for durability

keep us updated. love seeing new projects and designs

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Post by s2022 » Mon Jan 23, 2012 4:39 pm

thanks Roost,
which pic are you referring to?
its just a motor pinion direct to a center diff.
ah maybe the exploded view ; last pic of post #2, thats the motor pinion still in place, was just showing the installation setup; in the 3D view moved the motor, plate and screws back and separated them apart.
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Post by s2022 » Mon Jan 23, 2012 4:54 pm

most of the work is in the center diff housing, motor plate almost finished, screwholes countersunk.

Image

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excuse my bad cutting, will try and file it and finish it off better ;) using just available simple equipment; (a hand drill on mount and some files)

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tapping the screws, and contersinking the alum plates, don't have a countersink bit, used an oversize drill bit. it did a crude job but can live with it.

Image
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Post by s2022 » Mon Jan 23, 2012 5:02 pm

moment of truth, installation finally in my savage.

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used the screw holes on the tvp to support the 3mm left and right plates. the 3mm plates were tapped for easy installation and dismantling in future.

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feels good when all goes as planned, very tight clearances, the motor actually does not touch the tvp. servo arm is clear also.

Image

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Last edited by s2022 on Mon Jan 23, 2012 5:05 pm, edited 1 time in total.
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Post by Roost » Mon Jan 23, 2012 5:03 pm

[quote="s2022";p="818909"]thanks Roost,
which pic are you referring to?
its just a motor pinion direct to a center diff.
ah maybe the exploded view ; last pic of post #2, thats the motor pinion still in place, was just showing the installation setup; in the 3D view moved the motor, plate and screws back and separated them apart.[/quote]

ohk i see now. whats your plan for batteries 6s?. also clean your truck!  :wink:

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Post by s2022 » Mon Jan 23, 2012 5:10 pm

definitely 6s!
cleaning can come later.... ; but will take ur advice ;)
busy scratch building and tinkering.

planning a mamba XL with 8S in the near future, but with a 1520. the 1717 rated to 6S as i understand due to 35k max rpm.
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Post by Roost » Mon Jan 23, 2012 5:54 pm

1717 is only rated for 35k? interesting. with a center diff its hard to gear a 60k motor properly anyways

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Post by FluxNZ » Tue Jan 24, 2012 1:46 am

Interesting ideas you have s2022. Tiding up can come later just get it all sitting right and test it out  :wink:
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Post by s2022 » Tue Jan 24, 2012 6:58 am

correction to my previous post, the 1717 is rated for 45000 rpm, but on castle creations site its recommend voltage is 6s (probably due to the fact that it was offered on with mamba monster). maybe with the mamba xl 7s would be pushing it to the limit, 7x4.2v x 1580 kv = 46452 rpm.
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Post by s2022 » Tue Jan 24, 2012 2:38 pm

some details i forgot to mention at the beginning of the thread, the center diff spur is a 52t, planning to start with 13t or 15t pinion; according to my calculations 14t or 15t should be close to stock savage flux with 1515 2200 motor.


got my diff and motor mounted

Image

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and here got my esc installed, i'm happy with its location but not final yet.

Image
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Post by s2022 » Tue Jan 24, 2012 3:03 pm

installed my rx and took it out for its first test run. gentle on the throttle at first, two minutes and the esc smoked, have no idea what happened!
i had turnigy 5000 mah 2S + 3s =5S,  very conservative esc settings. already emailed castle, these guys have great support.

i know the mamba monster should handle the 1717. anyway plugged in my other mamba monster esc and same batteries, also gentle at first, everything seemed fine, haven't got WOT at first, but 5 minutes later and everything seems fine, temps are good, gave it some one or two wot runs and all worked perfectly! didn't go further afraid of smoking another esc. it seems need to invest sooner in a mamba XL!

I need the experts opinion around, i am contemplating one of the following esc's
Castle Creations Phoenix Ice 200 33.6V ESC
Castle Creations Phoenix Ice HV 160 50V VS2 ESC
Castle Creations 1/8 Mamba XL 34V Extreme VS2

can i assume the mamba xl will handle similar amp rating as the phoenix ice 200 33.6?
i understand from searching around i need a pistix to use the phoenix ice in a truck, correct?

what about those:
Castle Creations Hydra Ice XL 240 33.6V ESC
Castle Creations Hydra ICE 200A HV 50V VS2

if i install fans will it be sufficient for cooling, i am afraid of removing the tubes or heatsink and installing a proper one with fan.
i know they are overkill, but size, weight and a bit pricewize will get you an esc that can handle almost any motor. batteries would be an issue though ;)

any opinions feedback mostly welcomed.
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Post by Ascender » Tue Jan 24, 2012 3:12 pm

Looks good, even if the machining is rough. I'd think about tougher TVPs, though. The TCS 5mm XL-length ones will stand up to that power a lot better than the flimsy 2.5 stuff that came with your wheelbase conversion kit.

Also, are you planning on shoehorning a set of batteries into the rear? I ask because I'd set the ESC down in there, myself. If not there, then I'd try slotting it into hte space between the motor and servo up front. Having it up top like that seems to be just begging for a hard hit to trash it. That roll bar really isn't very tough.
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Post by Roost » Tue Jan 24, 2012 3:20 pm

[quote="s2022";p="819020"]installed my rx and took it out for its first test run. gentle on the throttle at first, two minutes and the esc smoked, have no idea what happened!
i had turnigy 5000 mah 2S + 3s =5S,

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Post by s2022 » Tue Jan 24, 2012 3:24 pm

i agree with you Ascender on the tvp's; btw they are 3mm. well let me sort it out first then can hop it up on the way. my focus is on the esc for now.
tried the batteries in the rear but won't fit!. i tried keeping a low center of gravity, thats why i moved the center diff and motor as much apart as the width between the tvp's.
yeah totally agree with you on the esc location, but you know just gotta test drive it!   :lol:

thanks for your feedback
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Post by s2022 » Tue Jan 24, 2012 3:36 pm

Thanks Roost, was checking out your build, really like it! Got me drooling on the Lehner, never owned one but hear they are great!
hmmm 160A only for the Mamba XL :?  weird searched maybe all the net couldn't get any official current rating on the Mamba XL :?

Although if you run the castle link in demo mode you can see the current cut off go from 175A to 275A. Need to do more research on the current rating of the Mamba XL, or go your route with a Phoenix Ice 200. Now you got me thinking of the Hydra Ice, i mean Hydra ICE 200A HV 50V, this will get you the best of both worlds, high amps when you need it even on 6S or 8S and you can go all the way to 12S!
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Post by Roost » Wed Jan 25, 2012 11:22 am

Just remembered it was at kershaws site that lists it at 160a

http://204.186.93.64/BrushlessESCs-Castle.htm

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Post by s2022 » Thu Jan 26, 2012 9:50 am

Thanks Roost, still contemplating the Phoenix ICE 200A or Mamba XL especially regarding the amp rating, i have also found a couple comments on the Mamba XL, which in a way confirms Kershaws site listing, it was mentioned couple of times in forums "The Mamba XL is basically the same ESC as the Phoenix-ICE160HV. They share the same control board." dunno if it means just the control part of the board, or also the mofset (i think thats what they call them) to handle the current, ie being same as the 160A.
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