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Tamiya TB Evo 8

Old 02-25-2024, 01:13 AM
  #331  
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Originally Posted by Casey
this is to show the 3d print mock up , the hoop would still go back on, , we are cutting the CF this week
make sure you get some stronger steel screws to secure the top deck, those holes are only m2.5 amd the kit screws that hold the plastic cover on are really soft

Last edited by hipwell; 02-25-2024 at 02:12 AM.
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Old 02-25-2024, 09:04 AM
  #332  
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Curious is there a one-way differential that will fit this car

Last edited by dawgmeat; 03-01-2024 at 05:27 PM.
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Old 02-25-2024, 02:21 PM
  #333  
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Originally Posted by dawgmeat
Curious is there a one-way depth that will fit this car
tb05 one way will probably fit, but I wouldn't bother, nobody has run one ways for years, spool is faster.
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Old 03-01-2024, 03:28 PM
  #334  
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Top decks for EVO 8 complete
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Old 03-01-2024, 04:15 PM
  #335  
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When your car is loose in the rear on power don't start changing Springs and everything else simply go up one stiffer sway bar in the front or one softer sway bar in the rear first then go to your rear toe add a half a degree that should put you right where you want to be shocks and oil should not need to be changed rarely if ever tuning is fun but changing Springs and shock angles will put you in the wrong direction and overwhelm you sway bars first rear toe second
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Old 03-02-2024, 04:09 AM
  #336  
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Originally Posted by Casey
Top decks for EVO 8 complete
That looks awesome. Think you could design one for rear motor layout?
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Old 03-06-2024, 06:17 AM
  #337  
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with the help of Fabio from FABTEK, the top decks are now available in limited quantity
Tamiya TB Evo 8 Horizontal Top Deck Set — FabTek Engineering (fabtek-engineering.com)
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Old 03-15-2024, 03:39 PM
  #338  
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Been playing with rear motor setup the last few weeks.

At first it was undrivable, no rear grip at all.

Made some changes tonight and she was flying finishing 2nd in the A final about 5 seconds behind the leader in an awesomatix.

Can't wAit to see what i can do with a 421.
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Old 03-20-2024, 02:48 AM
  #339  
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I took my evo 8 out for a spin last night as it was a club 'GP' night so basically a seeding practice then 3 Finals and didn't count towards the season. I took my 420x as a backup as well.

After playing with setup on the TA08R I had I realised the suspension geometry meant it responded better to softer springs and thicker oil than I would run on the 420x (2.5-2.8 front 2.65or 2.7 rear with 450 oil) so I thought I would try some axon 2.35-2.65 front springs and 2.5 rears with 500cst oil which is closer to how the pro Mugen drivers setup their cars for high grip (they use even softer springs). I also bought some orca super lcg batteries like Hipwell which balanced the car out better as well I think.

The car felt great if a little less agile much more consistent and I scored my first 24 lap runs on this layout without a hint of grip roll. having won the first two finals with the Evo 8 (with a pace that would have put me mid pack in the A) I thought I would switch to the 420x to see the difference - which was only about 2 seconds over the run and 3 tenths on ultimate lap time..... However the grip had come up even more between the 2nd and 3rd round of finals so probably more like 1-2 tenths in reality. I did however come 2nd due to a couple of silly errors on my part not being used to the car after using the evo 8 all evening.

I'm going to keep the same shock setup going into next week and play with the roll centre a bit higher to try and get a little more urgency into the car without introducing the grip roll back. I'll also make up some shocks with 475cst oil and play with those.

All in all very happy with how the evo 8 was running and shows how its not far off the other cars as well.



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Old 03-20-2024, 07:59 PM
  #340  
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Did the 3rd race with the Evo8 last sunday. The car is getting better and now is pretty easy to drive but still off pace. I actually had equal fast lap times as the other drivers in the 21.5 expert class. But after doing back to back runs with my MTC2 i think its about .2-.3sec off pace still. Unfortunately the timing was not on practice mode, so not sure what the lap times were.

I am using the same Axon 2.35-2.65 progressive springs BigKOV is using up front but with stock springs in the rear. One thing that really helped was going up to 2.5deg rear toe. I am actually running 2 other Tamiya shaft drive cars (TB04R and TB05R right now and something i've noticed is the cars are very loose on power with anything less than 2.5deg rear toe. I also went up to a 1.3mm front sway bar which helped calm the steering down a bit. The other issue i was having is the car has a lot of initial steering, borderline too twitchy, but it seems to lack grip up front. Next race ill try lowering the roll center in the front with the .5mm inserts. Also based on the tire wear, this car seems to want lower camber numbers. I was at 1.5deg front and 2.0deg rear. Next race ill try 1deg front and 1.5deg rear. I'm running kit shim settings still on the upper arms still which is about .5deg of camber gain.

Keep in mind, i am running on asphalt.
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Old 03-21-2024, 06:21 PM
  #341  
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How does this chassis do for both black carpet and asphalt ?
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Old 03-23-2024, 02:20 AM
  #342  
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Originally Posted by Schs2013
How does this chassis do for both black carpet and asphalt ?
not sure yet, we are changing to high grip black carpet next month. I think it will struggle, it generates so much grip even on grey carpet
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Old 03-26-2024, 06:01 AM
  #343  
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Correct, the evo 8 has too much flex for high grip ( that is what is at my track Black carpet ) thats why i had the top decks made, they work amazingly well ! ,
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