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mike_o

TT-02B / Neo Scorcher discussion

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This is for all things TT-02B chassis or Neo Scorcher.

5736707.jpg

After a couple of years absence from RC cars, I just build the Neo Scorcher and started looking for tips in here. I only found scattered posts on specific topics, so I decided to try out a general thread for the TT-02B chassis.

http://youtu.be/gHC0XOIHw-I

Having sold the majority of my Tamiyas, I only have few shelf queens left, which will not go racing, but the Neo Scorcher may just hit a small track this summer, so I'm looking for simple upgrade suggestions (I want to keep it simple, cheap and fun)

I have already fitted ball bearings, but I haven't decided a motor yet. The kit includes a 380-type motor mount, and I consider getting a 28mm inrunner to keep weight down. Any suggestions on KV for this? (14T -16T pinions will fit the mount resulting in 11.38:1 - 13:1 overall gear ratios)

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If you are planning on racing it, perhaps it would be wise to check the rules of the club/class where you intend racing, as this is very likely to have a bearing on your motor choice. Even if it is an informal racing scene with no strict rules, it would be advantageous to know what the other folk are running, and power your car accordingly.

Also, if racing is on the cards, upgrading the plastic diffs and gears to the metal DF02 items is a good idea. Under race conditions, the stock rear diff flexes and allows the gears to skip. Some people machine a metal ring to reinforce the stock diff, but a far quicker and easier solution is to use the metal ones from the DF02 as they are a direct fit.

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Yep stock gears will be a issue with anything else then a silver can.

We at Boondal have a combination of metal and reinforced plastic gears at the back only as XV Pilot suggested. We are running a 8.5T combos . Alloy center shaft and a alloy Yeah racing motor mount. Most of us run modified shock locations for more droop . I personally retained stock mounting points and used longer alloy shocks for more suspension travel.

All very simple mods but really transform the DT02B into a rip snorter fun racing buggy for your $$$$$ There are a lot of after market parts too.

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Are there any other body options for the Neo Scorcher?

It's been around for over a year, Tamiya have usually re-used the chassis several times by now

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I haven't seen any other bodies than the Neo Scorcher, but they should probably come along any day...

Since I'm trying a light build, I mounted the $21 2845mm HK motor with a 14 teeth brass pinion.

15189.jpg

Did a short test run with a 1800mAh 3S LiFe (9.9volt), and it seems to work very well. Plenty of speed and the stock chassis is surprisingly well balanced :wub: Also, as reported elsewhere, the drivetrain is pretty quiet.

Edit: I have realized that above 3900kv motor runs a little hotter than I prefer and I don't use all the available power. I have now replaced it with a similar 2845mm 2400kv motor with a steel 16T pinion. At 2S 3000mAh, it's somewhat quicker than stock brushed, a lot lighter, and very driveable. At 3S it becomes pretty fast and - for me - less driveable. But I may need practice :P

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Hi all can anyone tell me what mod is the pinion gear on the tt-02b. I'm looking to fit a steel pinion.

Thanks Steve.

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So, has anyone heard any further news, or seen pictures, of the TT02B Pink Metallic Special?

As for other bodies, I am really only anticipating one more, plus perhaps a version of the Avante later on. That is the precident set by the DF02 and DF03 after all.

Come to think of it, the TL01B also only had two body styles, and it didn't even get an Avante rehash.

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Haven't seen any other bodies for it either Andy..

The TT02B hasn't been out for that long. Haven't seen the pink metallic edition. Is this for sure as Stella hasn't got it listed.

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After having my hands on the Neo Scorcher for a few days, I got annoyed with the suspension slop (not steering slop), which seems to originate largely from the damper mounting step screws. The stepped portion of the screws seems to be a bit undersized. Mounting ball type mounts instead got rid of 75% of the slop, which is good enough for me.

I took the car to a local track, and I was pleasantly suprised over how well it handles. The track has a hard dirt/clay surfaced with some dust, and I now wonder if the another set of tyres would be better than the stock "super gripper" spike tyres. I have a new set of 54185 Tamiya 4wd High Density Off Road Tyres K

51240.jpg

as found on the Dark Impact. Would these be better suited for the track?

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To the best of my knowledge, the stock wheels used on the Neo Scorcher are the same as those used on the DF02 and TL01B before it, which means they are a bit smaller than standard, whereas the DF03 uses standard size buggy wheels and tyres. Therefore, if you wish to run DF03 tyres, I would recommend getting a set of DF03 wheels too. (This would also open up a wide range of other tyre options from other manufacturers.)

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XV Pilot, thanks yes, that's correct.

Fortunately, I had a set of Dark Impact wheel (including rims), so I just swapped them. The Dark Impact (standard size) measure around 62mm rim diameter whereas the Neo Scorcher rims are 60mm, which is also marked on them. Strange move Tamiya. Perhaps to secure sales of original Tamiya tyres???

Anyway, the Dark Impact / High Density Tyres "K" worked well, but the fresh stock tyres weren't half bad either....

DSC_0007_zpsb6d7655e.jpg

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Do you have part numbers for the metal diff or could you post a link where I can purchase them from. I believe the pinion is 0.6 mod, I've been looking at the RW Racing versions.

Yes, I believe you'll need the DF-02 #9400152 metal parts bag A (and the DF-02 #51080 Gear Bag (Rising Storm Spur Gear) if you want to build the entire diff.). The 0.6 module motor pinion is not part of this assembly.

I received mine yesterday, and incidentally I broke one of the gears today when trying out a 36mm outrunner...

DSC_0006_zps4df839cd.jpg

Note the missing tooth on the left hand side of the bevel pinion gear :wacko:

I have noted that some of the other members only replace the plastic bevel pinion gear with a metal one, so very few of the parts are being used. However, the A parts also contain a steel motor pinion and 8 nice brass ball connectors, which can replace the sloppy step screws that holds the oil shocks, so it's not a total waste :P

Edited by mike_o

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Is the binding in the gearbox as the car moves forwards/backwards, or in the diff as the wheels move in opposite directions?

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Is the binding in the gearbox as the car moves forwards/backwards, or in the diff as the wheels move in opposite directions?

XV Pilot,

fwd/rev is the problem. It seems that the top mount makes the gears lock. I have tried removing everything but the diff gear and the bevel pinion gear, and they still bind. When the mount is removed and the gears are sitting in the chassis cradle, they move freely. The diff unit rotates freely when lying in the separate (upside down) top mount. I have also tried the stock plastic diff assy with the metal bevel pinion gear and that binds too.

It is as if there is just too little play for the metal diff gear / bevel pinion gear in the assembled chassis cradle / mount top....

Perhaps Mad Racer can chime in? He seems to have tried various combinations.

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That is very odd, since many others run that precise arrangement with no reported issues. Do you think one of the mouldings is warped perhaps? Or maybe some moulding or casting flash is getting in the way somewhere?

I would suggest doing a side by side comparison of the stock parts and your new metal ones, and see if you can spot any inconsistencies. Hopefully it is an issue that can be solved with some careful filing...

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XV you are on it.....

With the metal gears I have only used the metal drive pinion that runs from spur gear shaft to the main diff gear. I had to file the gear down a tiny bit as it was binding once screwed downed . It's not much but it does need to be filed a little and your binding should be gone. :):)

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XV you are on it.....

With the metal gears I have only used the metal drive pinion that runs from spur gear shaft to the main diff gear. I had to file the gear down a tiny bit as it was binding once screwed downed . It's not much but it does need to be filed a little and your binding should be gone. :):)

XV and Mad,

thank! Is this (red marking) where you filed off some material?

bevelgear_zps8417ccb3.png

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Yep File some away of the back of the bevel gear as you pointed and test it. A little at a time to it's free..

Won't take too long.

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Yep File some away of the back of the bevel gear as you pointed and test it. A little at a time to it's free..

Won't take too long.

...I would suggest doing a side by side comparison of the stock parts and your new metal ones, and see if you can spot any inconsistencies. Hopefully it is an issue that can be solved with some careful filing...

MAD RACER, XV Pilot,

thanks a million! A side by side showed quite a difference, about 1.1 mm:

DSC_0005_zpscf383a22.jpg

After shaving that off, the gears spun freely :)

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Hi all is there any reason why some members only change the rear plastic gears for metal ones and leave the front plastic ones in place and some members change both front and rear.

Steve.

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Personal preference.

Around 80% of drive is to the rear. So the rear is the first to go. Ever driven a 4wd car with the rear tranny discounted & see how it goes?

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Can you just replace the tt-02b plastic gears with the rising storm metal ones or do you need to use the rising storm diff gear case as well.

Steve.

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Can you just replace the tt-02b plastic gears with the rising storm metal ones or do you need to use the rising storm diff gear case as well.

Steve.

Steve,

the TT-02B stock plastic bevel pinion gear can be replaced with a DF-02 Rising Storm "shaved" metal bevel pinion gear WITH the stock TT-02B plastic diff gear unit. But the DF-02 metal bevel pinion gear needs to loose around 1.1mm of length to fit in the cradle. When it has been milled/shaved or whatever, both the stock TT-02B plastic diff gear unit and the DF-02 metal diff gear unit will fit.

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Steve,

the TT-02B stock plastic bevel pinion gear can be replaced with a DF-02 Rising Storm "shaved" metal bevel pinion gear WITH the stock TT-02B plastic diff gear unit. But the DF-02 metal bevel pinion gear needs to loose around 1.1mm of length to fit in the cradle. When it has been milled/shaved or whatever, both the stock TT-02B plastic diff gear unit and the DF-02 metal diff gear unit will fit.

I've got hold of the rising storm metal parts 'A' bag and the rising storm diff gear case. I'm just a bit confused what to do next. I also can't decide whether to change just the rear diff or both the rear and the front.

Is there an idiots guide somewhere for me to follow to change the gears.

Steve.

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