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Old 05-15-2014, 01:48 PM   #166
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The good thing with the servo mount on the Evo 6 is it looks like the main mounting points are exactly centered under the shaft, so flex characteristics will not be compromised.

The servo is moved out farther a little but servos are not too heavy. Plus when balancing out my TC cars, the front left (servo area) needs weight added to balance out the battery side.

Also have a Pro4, wasn't a huge fan of shaving a part of the ear to clear the shaft. (BTW, has anyone seen the new Awesomatix servo with built in mount?)

I still don't like how the motor is far out as it is. On my Xray T4 where the motor is closer to the center, I still had to add weight on the right rear battery side to balance out the motor side. This was with a battery that weighed 330 grams, so it was a bit on the porky side. The Evo 6 will require even more weight to balance out.
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Old 05-15-2014, 05:28 PM   #167
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You could run a shorter motor, someone makes one (trinity I think).

Personally it looks like the same layout as the tb04 http://www.thercracer.com/2013/11/ta...nd-review.html

Other than the motor mount the layout and shafts are the same. The TB04 is very good and the more high end elements featured on this, along with lighter chassis will really help it be potentially the new darling of stock classes.

As to gearing, I was able to get a low FDR with the tb04 (3.7) this noes mount will let you go lower.
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Old 05-15-2014, 06:18 PM   #168
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Quote:
Originally Posted by Qatmix View Post
As to gearing, I was able to get a low FDR with the tb04 (3.7) this noes mount will let you go lower.
Yeah but to cover yourself for all spec classes and all tracks lengths fdr needs to reach 3.0 to be safe, yes? Assuming you can fit the largest pinion (40t/48p) and the smallest spur (65t/48p) with the gearbox ratio of 2.5:1 the maximum fdr is 4.06, is that correct???

Are the facts right that it only has a 2.5 internal ratio? That sound awfully high!!!

No front swing shaft protectors for the front outdrives either... Probably a good thing as on the 418 many people found they wear badly.
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Old 05-15-2014, 06:58 PM   #169
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So interestingly it comes with 1 piece front and rear suspension blocks at both ends. Mounting holes are there for 2 piece though.

I wonder what drove that decision?

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Must have!!

Anyone know if this will share suspension plastics with the TB04 that is coming out? This car sounds like it is using 418 parts but I couldn't find anything saying what the new TB04 is using.
The TB04 pro II is using 418 style arms and uprights etc. but will have 6deg hub carriers. Highly likely they will be standard plastics as opposed to the CF reinforced ones on the 418 and as the EVO6 would appear to have.

Last edited by cplus; 05-15-2014 at 07:19 PM.
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Old 05-15-2014, 07:25 PM   #170
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Yeah but to cover yourself for all spec classes and all tracks lengths fdr needs to reach 3.0 to be safe, yes? Assuming you can fit the largest pinion (40t/48p) and the smallest spur (65t/48p) with the gearbox ratio of 2.5:1 the maximum fdr is 4.06, is that correct???

Are the facts right that it only has a 2.5 internal ratio? That sound awfully high!!!

No front swing shaft protectors for the front outdrives either... Probably a good thing as on the 418 many people found they wear badly.
I'm pretty sure you are way off on this size pinion that would fit with a spur that size.
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Old 05-15-2014, 09:50 PM   #171
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Originally Posted by Juan Aveytia View Post
I'm pretty sure you are way off on this size pinion that would fit with a spur that size.
That's not my point ! Whether or not I have a accurate pinion or spur that will fit is irrelevant, it's the fdr that matters and the internal ratio of 2.5 is high when trying to achieve a desired fdr of 3.0 to 4.0 for some spec racing on medium to large tracks!
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Old 05-15-2014, 09:57 PM   #172
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I don't see it as a problem with this layout. The topdeck is not in the way of a large pinion like it would be on an Evo 5.
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Old 05-15-2014, 11:05 PM   #173
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With the Exotec motor spacer I have been running an fdr of 3.5 on my tb04. Considering then Evo6 new motor mount it will be very easy to get a lower fdr.
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Old 05-15-2014, 11:36 PM   #174
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Okay let me try and explain this another way...
To get low fdr (final drive ratio's) you have to put on a small spur and a large pinion, yes?
What is the smallest spur on the market at the moment that is readily available? Lets say it's 65 tooth.
What is the largest pinion on the market at the moment that is readily available? Lets say it's 40 tooth.
With an internal gearbox ratio of 2.5:1 (info from Qatmix, thank-you), that means you'll only ever get down to 4.06 fdr (assuming there is room to fit both in the motor slide adjustment)!
final drive ratio = (Spur / pinion) x internal gearbox ratio
4.06 = (65 / 40) x 2.5

The TB 04 has an internal ratio of 2.294, yes? Using the same spur and pinion as above that means you're only getting 3.73 fdr.

The only way to get lower fdr is to get either smaller spur or larger pinion (or both), which can be difficult...
This is my point! If the TB Evo 6 is actually 2.5:1 that makes it hard (not impossible) to get proper fdr for all tracks/spec classes... geezz!!! lol
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Old 05-16-2014, 12:17 AM   #175
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Then how do the TC3 and TC4 guys do it with a 2.5 internal ratio? If you had a 65 spur, then you need a 54 pinion to get 3.0 final drive. Not sure what you run over there but I use a 54 pinion often with my BD7. It's not a problem using a pinion that size or bigger.
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Old 05-16-2014, 12:26 AM   #176
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2-bad is using 48p gears for his example and I don't think I have seen anything larger than a 45t pinion in 48p - 54t would be massive. I have however run a 55t 48p spur (on an awesomatix) so allowing for a 45t pinion and a 55t spur you could get to a fdr of 3.05. This is pretty much bang on for the 21.5s we run at our medium sized outdoor track.

Please note that I am not actually claiming you could get this gearing to actually mesh on the new car - just that the maths says it's possible.

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Old 05-16-2014, 01:28 AM   #177
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FYI: If you guys use 64p gears, you can get a spur gear small as a 72T & a pinion big as a 55T which will give a FDR of 3.27.

I have fitted a 72T 64p spur and a 53T pinion on my TC3 a few years ago which gives a FDR of 3.4.
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Old 05-16-2014, 04:02 AM   #178
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And they are readily available everywhere eh?
All I was trying to point out is that with this gearbox, one would also have to consider ensuring they could secure these special spurs/pinions as those sizes are outside the normal sizes from most supplies.

I give up....haha
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Old 05-16-2014, 04:11 AM   #179
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Quote:
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And they are readily available everywhere eh?
All I was trying to point out is that with this gearbox, one would also have to consider ensuring they could secure these special spurs/pinions as those sizes are outside the normal for most supplies.

I give up....haha
I have a 70t spur and a 55t pinion. With the I.R of 2.5 (the same as the TB04) I will get a FDR of 3.1 the biggest pinion I have seen is 58t (64dp)
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Old 05-16-2014, 07:24 AM   #180
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Quote:
Originally Posted by 2-Bad View Post
And they are readily available everywhere eh?
All I was trying to point out is that with this gearbox, one would also have to consider ensuring they could secure these special spurs/pinions as those sizes are outside the normal sizes from most supplies.

I give up....haha
I know what your trying to say, however at least in Australia, getting pinions up to 70t isn't too hard.

I believe the reason for such a high internal drive ratio is due to ring/pinion gears only being durable in certain pitches/tooth counts but maybe someone well versed on this topic can step in...
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