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Tamiya TB Evo 8

Old 07-05-2023, 02:59 PM
  #226  
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Have you noticed much wear on the rear output shafts from the spur gear in the rear motor setup?

Looks like it might be prone to wear and the rear motor setup parts aren't available, whereas the front motor parts seem to be available
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Old 07-05-2023, 05:41 PM
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Originally Posted by hipwell
Have you noticed much wear on the rear output shafts from the spur gear in the rear motor setup?

Looks like it might be prone to wear and the rear motor setup parts aren't available, whereas the front motor parts seem to be available
I'm running 17.5 and after 5 runs I haven't noticed any wear or play with shaft. Are you talking about the super short shaft? If so my is covered in think grease so it helps with wear. I think its the same part for EVO 6 but yeah that part is unavailable. Wish Tamiya would go the plastic blades for shafts makes it easier to replace
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Old 07-06-2023, 02:44 AM
  #228  
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Originally Posted by hotdognobun
I'm running 17.5 and after 5 runs I haven't noticed any wear or play with shaft. Are you talking about the super short shaft? If so my is covered in think grease so it helps with wear. I think its the same part for EVO 6 but yeah that part is unavailable. Wish Tamiya would go the plastic blades for shafts makes it easier to replace
Yeh i mean the really short one which connects to the rear gearbox input pinion.

Yeh, although to be fair, in 7 months of racing every week in front motor config i have zero wear on both of my prop shafts or outdrives on the spur gear.

It's just that wierd short rear shaft in the rear motor setup thats worrying me. Ill just try to keep it greased
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Old 07-07-2023, 12:16 AM
  #229  
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Originally Posted by hipwell
Yeh i mean the really short one which connects to the rear gearbox input pinion.

Yeh, although to be fair, in 7 months of racing every week in front motor config i have zero wear on both of my prop shafts or outdrives on the spur gear.

It's just that wierd short rear shaft in the rear motor setup thats worrying me. Ill just try to keep it greased
There's definitely more strain to the rear since it's more direct so I'm guessing wear is inevitable. I maybe running lower gearing so torque is minimal and doesn't put stress on it. Grease maybe hiding the wear marks so next time when I do a proper cleaning I'll check.
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Old 07-07-2023, 12:52 PM
  #230  
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It's terrible. Can't get it round the track lol! On the verge of packing up for the night.

Going to try a full length lipo next round to see if that calms it down
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Old 07-07-2023, 04:34 PM
  #231  
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Scrap that, I found after the 3rd quali that my diff was seizing up, think I overfilled it!

Gonna give rear motor one more try.
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Old 07-09-2023, 09:13 PM
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I think I have found a fix for the over rotation for the mid motor setup. I have moved the electronics towards the rear of the car and it helped with a little more weight in the back (ESC on the rear edge of the carbon floating plate and the receiver behind the shorty on the other side. Also I have stopped rotating the tyres front to back, only left and right on the same axle. So far so good.
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Old 07-09-2023, 10:34 PM
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this car was discontinued in less than a year?
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Old 07-09-2023, 11:30 PM
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Originally Posted by slappomatt
this car was discontinued in less than a year?
Could be releasing a "Pro" or "MS" version?
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Old 07-10-2023, 09:35 AM
  #235  
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A lot of Evo, TRF, or MS kits get discontinued quick which is normal for Tamiya.
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Old 07-10-2023, 04:17 PM
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Anyone know if have a front gear diff makes a difference? Solid spool is cool but like having a diff that is tunable
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Old 07-11-2023, 10:04 AM
  #237  
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Originally Posted by hotdognobun
Anyone know if have a front gear diff makes a difference? Solid spool is cool but like having a diff that is tunable
I wouldn't bother, evo 8 has got so much steering anyway putting a diff in the front will have zero benefits In my opinion. I don't know of anybody who's ran a front diff competitively for a long time.
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Old 07-13-2023, 03:06 PM
  #238  
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Originally Posted by slappomatt
this car was discontinued in less than a year?
Tamiya produces limited edition items (RC items with a 4 in the first digit) in certain numbers, usually around 1000 and that's it. It's not "discontinued", just the batch being sold out.

I have been very quiet in this thread (sorry) because outdoor season usually means I tend to run my TRF 420 which has it's bottom floor already properly scratched but for tomorrow I want to know what the TB EVO 8 can do on my home track so I have been prepping all evening


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Old 07-14-2023, 02:29 PM
  #239  
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It was a fun time at the track today! Mostly because of the banter with the other drivers, the car didn't provide as much enjoyment unfortunately. Even though at the end of the day I managed to beat my best time with the TRF420 – I can now officially claim that I don't understand this car at all. Indoors it produces so much grip that traction rolling is my primary issue, outdoors it is struggling for grip and was sliding all over the place. It was more of a drift challenge than anything else, really. One thing I can say for certain though, while all the fiddling with different upper deck stiffening solutions might prove beneficial on carpet, on asphalt I was getting my best results with the kit default (high flex) upper deck. I am a bit puzzled now as what to do. Also, and that goes especially out to the very helpful hipwell – where and how do you measure droop with this car? I am getting very different readings front and rear, and the lower suspension arms being completely different in construction compared ones in the "classic" TRF 418/419/420.
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Old 07-14-2023, 04:30 PM
  #240  
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Evening mate. Just got back from indoor racing myself and had a much better night, back in front motor config.

Grip rolling is back now it's warmer inside and the grip is up, I've tried eveerything, High roll centres, low roll centres, loads of droop, not much droop, stiffening brace for the top deck, I just don't understand it either.

But, it's still rapid, i came from a 419xr with mid motor and 420 suspension and still every week I'm a lap up on the guys I was half a lap up on with my 419. But the evo is just so difficult to drive, it's so twitchy and setup changes just don't seem to make any difference.

I think if you can handle it, she's fast, Ive had to completely alter how I enter corners to avoid traction rolling, and when I do I can put some amazing laps together.

I measure droop with a flat stepped right height gauge with the chassis flat on the board, flat bit of the gauge directly under the wishbone touching the plastic, but before the screw (which protrudes lower than the wishbone)

I'll post a pic tomorrow of how I do it.

But while we're on droop, tonight I wanted to try less droop on the front (higher number on the gauge) as my car was pushing too much on power so was hoping this would keep a bit more weight on the front on power, it worked, but, on the second corner the car flipped as I wasn't expecting it. So I settled on 5.5 on the front and 5 on the rear, using my method.

I'm just not sure how I feel about the car now, I love it, it's different, but I just can't help but feel I as a driver have got more potential than the car.

I'll keep at it until a 421 comes out then I might put the evo on the shelf lol.
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