Jump to content
  • Join our community

    Sign-up for free and join our friendly community to chat and share all things R/C!

Fornowagain's Savage Flux XL


fornowagain

Recommended Posts

Hi, so just a few pics from my first real custom RC build. My son had a Savage XS for Christmas and we (me) had as much fun repairing it as we did bashing it. That I thought I'd build it a big brother from scratch so I can keep up with the little terror (my son not the XS).

 

So no donor car, just gradually bought a load of bits and chucked them in a box. Ended up changing a few things as it went on, still not finished, very nearly done now though. It's all de-anodised back to alloy to remove the rainbow colour scheme I ended up with.

 

So the spec:

 

Alza Center Differential Kit inc front dogbone

Alza Front/Rear Bulkhead Brace conversion

Alza Servo plate

Alza FLUX XL Chassis 5mm

Alza Skidplate XL

Alza XL Rear dogbone

Alza Upper arm brace

Alza F/R Chassis brace

Hobbywing Quicrun 8BL150 Waterproof ESC 6s

Savox SW-1210SG Waterproof Digital Servo

Castle 1717 motor 1650kV

Novak 5mm Mod 1 Hard Pinion Gear 9/10/11

Castle 6.5mm connectors

EC5 battery connectors

2x Turnigy 5000mAh 3S 40C Lipo

Traxxas #2407 Waterproof receiver box

FLYSKY 3CH FS-GT3C Tx/Rx

Various A4 Stainless M4/M3,  M3 12.9 HT Cap heads

Various bearings, oil etc

Integy Savage Heavy Duty Rear Hub Carrier #T6979

Integy Caster Block #T6984

Integy Steering Knuckle #T6721

RPM A-Arms Left Front/Right Rear #82012

RPM A-Arms Right Front/Left Rear #82002

ProLine Big Joe II 3.8 Tyres

Proline Black F-11

Edited by fornowagain
  • Like 1
Link to comment
Share on other sites

First assembly of CD. Diff is from a Vorza. 50T pinion, hardened gears added and 500K oil.

 

2015-02-05%2018.04.01%20Medium_zpszkoi5h

 

All fit brilliantly except, well known the can hits the outdrive cup with low enough pinion. This is 11/50. So milled off a flat on the motor.

 

2015-02-05%2018.01.47%20Medium_zpskbmwxb

 

Then noticed the dogs touched as well, so they had a haircut.

 

2015-02-05%2018.00.16%20Medium_zps4n5wsq

 

Tried the paper mesh, like it says in the manuals. Didn't like it, too much to my eye, set it by feel. Just enough play for good mesh and no pressure on the bearings. Went with cap head instead of button screws for the bigger allen size and red threadlock. Hardened gear, bit of git getting the grub screw run the length of the thread as they hadn't cleaned up the threads before heat treatment.

 

2015-02-05%2017.51.55%20Medium_zpsqetzdj

Edited by fornowagain
  • Like 2
Link to comment
Share on other sites

Nice, I is well jel.

Don't be surprised if you end up on a 13 to 15 tooth pinion. My 4092, 1480 kv handles 13/52 just fine, even on 6S. The extra girth of the 1717 should mean gearing up higher isn't a problem.

Link to comment
Share on other sites

Thank you. 

 

So first test assembly, worried the CD gear would touch the skidplate and it does. Then I noticed two sets of mounting holes on the CD assembled, thinking this is a v2 here. Move it and it clears. The Alza rear dogbone for the XL build has no slop, the front had 4mm. So sized orings to remove all but a breath of slop.

 

2015-02-10%2014.28.44%20Medium_zpsldzfvd

 

2015-02-10%2014.28.38%20Medium_zpshymmhx

 

2015-02-10%2014.28.58%20Medium_zpsbnfnka

 

2015-02-05%2018.14.07%20Medium_zpsi26f6t

Link to comment
Share on other sites

Nice, I is well jel.

Don't be surprised if you end up on a 13 to 15 tooth pinion. My 4092, 1480 kv handles 13/52 just fine, even on 6S. The extra girth of the 1717 should mean gearing up higher isn't a problem.

I've geared it for 45mph http://www.scriptasylum.com/rc_speed/top_speed.html Just to get started and see what the temps are like. I'm not looking for top end tbh, my lack of piloting skills and the weight of this thing could make for a deadly combination.

 

Always a fan of before and after pics. Castor block, knuckles and rear deletes. Prefer alloy parts here for the bearing mounts, plastic for the arms and towers to allow some flexing.

 

2015-02-11%2011.59.11%20Medium_zpstny4xr

 

Some material milled off the back of the hexes and they fit well with the XL axels.

 

2015-02-11%2013.46.31%20Medium_zpsvxyr8t

 

Later in the build I lost a pin messing around, figured that would happen again so tapped one side and used M4 screw shafts.

 

2015-02-20%2020.14.49%20Medium_zps0iwvyh

 

All pulled up tight, no end wobble. Spacer still able to turn a little to avoid pinching the bearings.

 

2015-02-20%2020.20.48%20Medium_zpsebpmdo

Edited by fornowagain
Link to comment
Share on other sites

On to the electrics.

 

Old style battery boxes, dremeled the cable slots and tabs, removed a couple of fins so they can mount backwards. Went with EC5 after a few Deans died on my sons car. Big old 8awg cables on the Turnigy's which is fine by me, but a tight fit in the solder cup.

 

2015-02-06%2015.48.58%20Medium_zpscsjngv

 

2015-02-10%2014.07.15%20Medium_zpsa4rpnt

 

Mounting the ESC was interesting, thought about a plate, but went with two Alza cross braces. Clamped the plates together, and drilled the holes accurately on a mill. Same for the braces, ESC just screws in place. Which is all fine as long as it's the same ESC.

 

Also I think the chassis really needs some reinforcement at the back on the XL extension. There's not much there otherwise, so needs a cross brace or two to make the frame rigid.

 

2015-02-10%2019.43.57%20Medium_zpsp6kwxy

 

2015-02-10%2019.51.45%20Medium_zps6ykqpb

 

Chopped off the 4mm banana plugs and fitted 6.5mm castles and EC5 to the ESC. Ended up fitting the ESC 180 degrees to this for a better fit. Still seems a bit vulnerable to me, thinking on some sort of roll cage over the ESC.

 

2015-02-10%2023.00.30%20Medium_zps7yo6kv

Edited by fornowagain
Link to comment
Share on other sites

Front and rear bulkheads/towers. I'm not a fan of the HPI posi screws, so replaced everything with A4 stainless which is the strongest grade. The only place I wasn't confident on the stainless is on the M3 arm mounts for the big bores. So I used high tensile HT12.9 M3 cap heads which is the strongest possible. I've taken the tower top mount out to M4 to vastly increase strength.

 

20150222_171849_zpscd58bb10.jpg

 

Used savage flux bulkheads for the composite material. Looked at alloy bulkheads, only ones I could find that allow use of flux/XL HD outdrives were FLM from the states. Not sure if they warrant the cost.

 

Upgraded the 9/29 machined bullet proof diffs to use hardened gears and the Vorza diff housing. This removes the B032 10x16x5mm bearing for the stronger B085 8x16x5mm bearing. Shimmed diff assembly to suit the bulks, only needed two on the crown wheel side, one extra behind the pinion and heavy duty in cup to remove slop. Thought I had all the bits, gaskets etc. Assembled it with 60K front, 30K rear oil. Managed to overlook the M4 grub screws.

 

2015-02-11%2014.10.49%20Medium_zpslpj0cu

 

2015-02-11%2015.49.37%20Medium_zpsxbbghb

 

For reference if you want upgrade the diff, here's that parts list.

 

HPI101029  Differential Shaft (2), gear pins (2) 
HPI101142  Hard Differential Gear Set (6 gears, 4 shims) 
HPI101026  Differential Case Set  
HPI102692  Bulletproof Diff Set 29T/9T (if you don't have a donor diff)
HPI86599  or  86099 gaskets 
HPIZ877      8mm shim 
HPIB085      8mm Bearings ( 2)
HPI Z721     Grub Screw M4 x 4mm
HPI 86248   Super Heavy Duty Diff Cups
HPI 6811    O-rings 6x9.5x2mm (2)
4 off M3 x 15 CSK countersunk socket cap screws.
Edited by fornowagain
Link to comment
Share on other sites

Front and rears assembled. Again all fixings tapped to M4/M3 and stainless fitted. Alloy lower joint bar. RPM arms and Alza bulkhead brace conversion and upper arm brace. Used the optional -2 degree RPM arms. The RPM's are a royal pain to fit correctly. They bind, a lot, especially the upper arms. And the hing pins are too tight. Had to ream the 4mm arms pivots to size. Dremel clearance for the upper arms both ends. Some of the radii needed cleaning up to get a full range of movement without any sticking. Lower arms as well. Final result is no slop at all, smooth full range movement. Alza brace is superb. All very solid.

 

2015-02-11%2016.57.14%20Medium_zpsee78uw

 

2015-02-13%2016.04.58%20Medium_zpsiwkk9g

 

Skidplates need a little modifying to clear the brace kit.

 

2015-02-12%2016.46.58%20Medium_zpsowlkwg

 

2015-02-12%2021.49.38%20Medium_zpsztele0

 

2015-02-13%2017.44.51%20Medium_zpsv3p0cu

 

2015-02-13%2017.44.30%20Medium_zpsvzhw7h

 

2015-02-13%2017.44.21%20Medium_zpsprkn17

 

First fit.

 

2015-02-13%2017.59.39%20Medium_zpsmeqled

 

2015-02-14%2017.02.02%20Medium_zpsv98mur

 

2015-02-14%2017.03.07%20Medium_zpsb0ewln

Edited by fornowagain
  • Like 1
Link to comment
Share on other sites

They would have been the first Alza part I'd bought to be honest. Protects the bulkheads, strengthens the whole area.

..i'll get them then once I get sum funds up togather....gonna b waiting on all the bits I jus ordered anyway.....so hopefully i get these befrore all the rest turns up...seeing as alza got fast shipping shouldn't b a problem.....
Link to comment
Share on other sites

Lol, don't blame me.

Onwards, some mods before bed time.

Found these headlights with leds with lens that fit perfectly. Little notch to stop them turning. All running of the third RX channel, needs a small IC circuit hidden in the RX box. Works a treat.

2015-02-19%2020.19.09%20Medium_zpsjtqhzs

2015-02-19%2020.18.38%20Medium_zpsw5f6oq

lol..it was enevitable i'd spend
Link to comment
Share on other sites

So another mod I wanted to try. The stock big bore shock shafts are only 3.5mm, a bit thin tbh. Other wise the big bore are fairly tough and seem well suited to the truck. So looked for a way to increase the shaft diameter, whilst keeping the extended and compressed lengths. Oh and using red springs for the extra weight it's carrying now. Cheap enough mod, about

Edited by fornowagain
  • Like 1
Link to comment
Share on other sites

They won't bend easily, twice the material. Pretty cheap tools, nothing over a fiver each there.

ps. You might want to edit out the images in the quote.

and skills...i can barley drill a decent hole(well sum times) let alone tap..thread do things evenly. ..lol!! Edited by evssv
Link to comment
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Guest
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

Loading...
×
×
  • Create New...