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Tekno RC EB410 Thread

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Old 05-13-2019, 06:33 AM   -   Wikipost
R/C Tech ForumsThread Wiki: Tekno RC EB410 Thread
Please read: This is a community-maintained wiki post containing the most important information from this thread. You may edit the Wiki once you have been a member for 90 days and have made 90 posts.
 
Last edit by: tobamiester
Welcome to the EB410 Wiki page.

Basic Stats/Features:
  • Shaft drive (tapered AL for light weight and straightness)
  • Gear differentials (all 3)
  • Low Angle CVAs (with captured pins so no ejecting them!)
  • Durable stub axles with 12mm hexes and optional offset adjustments
  • Reverse bellcrank steering system
  • Quick access bulkheads (for easy diff maintenance and tuning)
  • Spllt center diff holder (for easy diff maintenance and tuning)
  • 8th scale style motor mount (for easy mesh adjustment)
  • 13mm big bore shocks
  • 3.5mm shock shafts
  • Droop screws

Videos
Servo Horns
Tekno included a plastic servo horn but also offers an aluminum one. This is highly recommended. Here's a list of servo horns that have been found to work:
Gearing:
Works out of the box for mod or 13.5.
  • Preference for Associated factory team pinions
  • Start mod gearing around 21t pinion
  • Start 13.5 gearing around 29t pinion with the stock spur (81tooth). If using a Tekin Spec R 13.5, start with a 24t pinion for medium sized indoor tracks.
  • Internal Gear Ratio: 2.5:1
  • For comparison:
  • B64 is 2.47:1
  • 22-4 is 2.4:1
  • YZ4 is 2.6:1

Wheels
  • B6/22/rb6 wheels direct fit
  • 22-4/XB4 front wheels direct fit
  • B64 front wheels will fit, but you need the +1 hexes (can use #TKR1654X, which is a +1mm hex)
  • 22 2wd front wheels will also fit, possibly a good option for carpet.

Setup Sheets and other documentation
Setup sheets for all Tekno RC vehicles can be found here. Please be sure to try our recommended setup. It works very well on most tracks.
Piston Drills:
Some of our setups recommend using pistons that are enlarged. For instance 4x1.9 or 3x2.0. To drill the pistons we recommend the following:
Aftermarket Upgrades:
Warranty Policy:
Tekno RC is the only company in the industry that will give 50% off of parts if returned to them using the General Warranty return policy found on their website. The parts can be lightly used or completely abused, as long as the part is still being produced it's covered!


Build Tips:
  • When fastening the steering posts with a 5.5mm socket wrench, you can back space the socket with some nuts to help drive the post into the bulk head

  • Place an alcohol swab over metal threads and drive screws through the swab to clean both sides of threads before applying thread lock

  • Use a metallic marker to indicate what fluids you have filled in your diffs for easy identification

  • Apply thin layer of grease on crown gears to help hold gaskets in place for easy hole alignment

  • Bags F and H have 2 different size set screws, be sure to use the smaller 3x3mm screws for the hexes or you may run into problems installing wheels over the hex if you use the longer 3x4mm screws
  • To make is easier to slip the o-rings on the shock cap bleeder screws, apply a drop of shock oil and slip them over a 1.5mm hex bit, then line up the bit with the screw and transfer the o-ring over using fingernails or needle nose pliers
  • pinch+rotate shock caps in 17mm hex wrench to improve roundness
    More shock build tips here
  • Use a 3.05mm drill bit or 3.05mm Kyosho arm reamer, 1/8" drill bits are not recommended because they are 3.17mm in diameter and tend to introduce too much slop, the pins are roughly 2.97mm in diameter
  • Replace the stock 3x14mm screws (TKR1405) with 3x20mm screws (TKR1409) in step H-10 in the manual in order to increase durability to the bulkhead.

  • When installing the front and rear differentials into the bulkheads be careful when tightening the 3x8mm screws of the cover that holds the diff in place. Bottom out the screws first (use a hand driver and make it hand tight) then check the diff to make sure it rotates smooth. If it binds up, start by backing out each screw 1/8-1/4 of a turn until the both front and rear diffs move freely. The plastic threads will keep the screws in place so don't worry if you think the screws are not secure.
  • When installing the steering hub kingpins (TKR6596), drive each one in hand tight only. Then check the movement of the steering hub. If it binds up, back out the kingpin screws by 1/8-1/4 of a turn until it moves freely. Then install the set screws (TKR1601) to hold it in place. Only drive the set screw in until you make contact with the kingpin. Do not force it.
  • If using the low profile servo mount, be sure to use smaller OD (outter diameter) washers to avoid rubbing on the center drive shaft. Protek ball stud washers are a good example of the acceptable diameter. You can chose to not run washers though it is recommended to use them as it makes for a more secure mount.

  • Ball Cup Alternative from AE: ASC91453. These are used as a harder composite option if you are not happy with the softer stock plastics. Note that these are approximately 2-3mm shorter and require compensation when building your kit to the manual specs to achieve proper camber/toe settings


  • Wheel Nut Alternative: Yokomo 4mm Thin Aluminum Serrated Flanged Nut

    https://www.amainhobbies.com/yokomo-...-n4flt/p541494


  • Moving Rear Shocks to the Front of the A-arm

    This is the break down of what's required by one of the Eb410 FB users.

    Joey A.

    So since there has been some people wondering about running the shocks in the front of the arm I though I would try explaining everything that I did to get them to work and why. My goal was to run as much stock stuff as possible with the least amount of modifications.

    -Arms- need to be flipped and 1mm shaved off the back (spacing the arm farther back) running it this way the car is still a mm shorter then stock but more material could be removed for more adjustability but I have found no need to make the car longer.

    -Inner ball stud- there are 2 ways of mounting, the first can be used with the stock plastic tower. All you need to do is use a 10mm ball stud instead of the lower shock mount screw and a little clearance from the shock tower and diff case. Using this method will work but the ball stud is moved lower and farther in then the stock locations which requires different pivot locations to try and correct roll centers. The other way (preferred) using the option carbon tower drill a hole higher and farther out if done properly you will be able to get the ball stud location in the correct hight(0mm) and between the two stock locations.

    -Shocks- only 2 changes from stock you will need to space the top shock mount 2mm out. You will also need to run around 1.5-2mm less droop depending on your setup.

    -Sway bar- this is the hardest part of the swap. This can be done a million ways I chose to print a mount in the stock ball stud location which allowed me to use the stock swaybars and arm mounting position. You can also bend your own bar and use the stock mounts on the back. You will have to drill your arms on the other side and closer to the pivot for this to work (remember you will need a thinner bar the closer you mount the lower pickup on the arm to get the same feeling as stock).

    -Other- you will need to remove the drop screws on the rear arm. Depending on rear rims,hubs,ballcups and setup you might need to clearance the outer ball cup so it doesn’t rub on the wheel.

    -Why- the benefits of running the shocks in the front are the ability to run a softer rear shock package without giving up corner speed and pack. The car will land without chassis slapping or packing out as easy allowing you to drive the car harder and it corners flatter and rotates faster without losing rear grip.

    Sorry for the shity grammar,
    TJR

    Sway bar mount for forward mounted shocks: https://www.ebay.com/itm/Tekno-EB410...4AAOSwYNxahFkq

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Old 11-18-2017, 06:40 PM
  #2416  
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By the way a B64 body works
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Old 11-18-2017, 06:55 PM
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With the Leadfinger body, I found it necessary to cut a hole for the top mounted fan above the stock plastic mount with 24T gearing for 13.5T

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Old 11-18-2017, 11:04 PM
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What's a good oil to use on bearings?

Anyone use T-work's titanium products? Are they any good?

Anyone have any part numbers for a 23t LP servo horn?
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Old 11-18-2017, 11:35 PM
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I want to buy a 4wd for 13.5 stock racing. I haven't been racing long 5 Races 10 Practices mostly w/ a short course and a buggy 2wd both associated. I recently moved and have a new track to get used to. I'm looking at both EB410 and B64D. Was going to just get the B64D but I was reading that the EB410 is a durable car. I think something that could handle a new driver better would be better for me. Most guys at the track are using associated. It's an outdoor bumpy dirt track with dusty to sandy conditions most of the time. (mostly the reason I'm switching over to a 4wd car) What are your thoughts for the guys who have driven and worked on both?

Last edited by Justin805; 11-18-2017 at 11:47 PM.
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Old 11-19-2017, 04:53 AM
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Originally Posted by billdelong
Odd as it may sound, it's because the EB410 has gobs of steering and it can rotate faster (within reason) is one of the reasons the popularity is quickly picking up interest at the club in my area... I just needed to add some expo into my steering rates to suit my needs... I think the electronics can be the fine tuning us mortals need to handle a factory driver setups.

I agree, Tekno did an awesome job for a first release #takesabow
I definitely suggest forgetting driver setups and setup according to skill and track. If you don´t know what to do then let drivers with experience drive the car a few laps and suggest setup.

To get better also neutral steering and throttle are my suggestion. Trying to get aggressiveness out of the car with electronics isn´t the way to better driving.

Tekno also pumps out more upgrade parts faster than maybe any other brand out there. So the "common" people get parts faster and can benefit from them.
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Old 11-19-2017, 05:11 AM
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How much does the RCSS titanium screw weigh vs stock screw kit? Looking at loosing some weight on my EB410
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Old 11-19-2017, 06:16 AM
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Originally Posted by billdelong
With the Leadfinger body, I found it necessary to cut a hole for the top mounted fan above the stock plastic mount with 24T gearing for 13.5T

Shouldn't have an issue with the Carbon center mount then I wouldn't think
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Old 11-19-2017, 07:04 AM
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Originally Posted by nanoverse
I definitely suggest forgetting driver setups and setup according to skill and track. If you don´t know what to do then let drivers with experience drive the car a few laps and suggest setup.

To get better also neutral steering and throttle are my suggestion. Trying to get aggressiveness out of the car with electronics isn´t the way to better driving.

Tekno also pumps out more upgrade parts faster than maybe any other brand out there. So the "common" people get parts faster and can benefit from them.
If I had followed this advice, then I truly believe that I wouldn't be toward the front of the pack at my club... many of the local Tekno drivers are doing just what you suggest and they were stuck in the B or C mains last night. Not saying Matt Wolter's setup was 100% what I needed (his setup was for carpet and I'm running on turf), but it was far closer than the box stock setup and I'm beating many drivers that I know are significantly better than me in most other classes. I know just enough to fine tune small things, but I need a good base setup to start with and that's where I rely on the pro setups, this resource is invaluable to overlook.
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Old 11-19-2017, 07:10 AM
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Originally Posted by charvel74
How much does the RCSS titanium screw weigh vs stock screw kit? Looking at loosing some weight on my EB410
typically, titanium hardware cuts the weight in half... so if you were to weigh all the stock screws, then divide by 2 to get a ball park estimate... if it were me, I would upgrade the upper deck screws and leave the heavier lower deck screws alone, idea being you want to lower the center of gravity so reducing weight from the bottom kinda defeats the purpose.
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Old 11-19-2017, 07:15 AM
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Originally Posted by proliteandsc
What's a good oil to use on bearings?

Anyone use T-work's titanium products? Are they any good?

Anyone have any part numbers for a 23t LP servo horn?
The Ruddog offset horn works great. By eyeball the dimensions are a perfect match to the plastic horns that come in the kit.

P/N RDGRP-0085-23 on Amain.
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Old 11-19-2017, 07:39 AM
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Originally Posted by proliteandsc
What's a good oil to use on bearings?
for open mod, I like to use Lucas Assembly Lube

for stock racing, I like to use Purple Extreme and I like re-apply once every 2 race days, I also apply this all metal to metal surfaces like CVD's, out drives, etc which significantly reduces wear.
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Old 11-19-2017, 09:29 AM
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Originally Posted by billdelong
typically, titanium hardware cuts the weight in half... so if you were to weigh all the stock screws, then divide by 2 to get a ball park estimate... if it were me, I would upgrade the upper deck screws and leave the heavier lower deck screws alone, idea being you want to lower the center of gravity so reducing weight from the bottom kinda defeats the purpose.
I want to know exactly what the weight savings are to see if its worth the money. Surely someone has compared both with scales
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Old 11-19-2017, 09:57 AM
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Originally Posted by charvel74
I want to know exactly what the weight savings are to see if its worth the money. Surely someone has compared both with scales
If you follow the instructions I gave, then you'll be within a gram or two... short answer is no, it won't be worth the money unless you need to shave minute fractions off your time... at my club, positions #1-7 are within 0.487 fast lap times and I'm at the point where I need every little advantage that I can find, but before investing lightened static weight, I would first look into lightening rotating mass, unsprung weight... i.e. ceramic bearings, plastic pinion, lunsford turnbuckles, possibly center spool, etc... these are areas I would go first. Price to weight ratio would also put carbon upgrades ahead with the screws going pretty much dead last in terms of weight to cost benefit. Depending on track surface, I also think heavier cars tend to be easier to control on higher traction giving a little more stability, so you can potentially rob Peter to pay Paul if you drop too much static weight depending on your track condition. I'm also seeing folks are starting to drill their chassis to reduce weight and increase flex, that can be done for free
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Old 11-19-2017, 10:10 AM
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Originally Posted by Justin805
I want to buy a 4wd for 13.5 stock racing. I haven't been racing long 5 Races 10 Practices mostly w/ a short course and a buggy 2wd both associated. I recently moved and have a new track to get used to. I'm looking at both EB410 and B64D. Was going to just get the B64D but I was reading that the EB410 is a durable car. I think something that could handle a new driver better would be better for me. Most guys at the track are using associated. It's an outdoor bumpy dirt track with dusty to sandy conditions most of the time. (mostly the reason I'm switching over to a 4wd car) What are your thoughts for the guys who have driven and worked on both?
I have both and plan on only running the Tekno in the future. Durability is a hard one as have broken a rear turnbuckle and front shock standoff on the Tekno in only a few days of running. The B64D I broke 2 front arms before they upgraded the design (running change). No issues after that. Long term durability I would say Tekno has the advantage.

Performance: In two days of tuning I was able to get the Tekno much faster (.5-1 second per lap on 35 sec lap outdoor track). It feels more stable and carries more speed through corners. The B64 is still very fast and in the right drivers hands I think would be just as fast as the Tekno. However I have spent a lot on upgrades for the B64. Taller rear tower, longer rear shock bodies, chrome shock shafts, machined shock internals, vrp valve pistons, alum steering rack. Out of the box the Tekno is way better.

Value/parts: While you could get some of the upgrades for the b64 for the same price as the Tekno kit, you will likely spend more on the b64. I own a B6 and it is nice to use the same shocks, springs, pills, etc vs all new stuff for the Tekno.
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Old 11-19-2017, 01:29 PM
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Originally Posted by billdelong
If you follow the instructions I gave, then you'll be within a gram or two... short answer is no, it won't be worth the money unless you need to shave minute fractions off your time... at my club, positions #1-7 are within 0.487 fast lap times and I'm at the point where I need every little advantage that I can find, but before investing lightened static weight, I would first look into lightening rotating mass, unsprung weight... i.e. ceramic bearings, plastic pinion, lunsford turnbuckles, possibly center spool, etc... these are areas I would go first. Price to weight ratio would also put carbon upgrades ahead with the screws going pretty much dead last in terms of weight to cost benefit. Depending on track surface, I also think heavier cars tend to be easier to control on higher traction giving a little more stability, so you can potentially rob Peter to pay Paul if you drop too much static weight depending on your track condition. I'm also seeing folks are starting to drill their chassis to reduce weight and increase flex, that can be done for free
I'm running on high bite carpet. Ricochet raceway.
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