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Old 08-15-2014, 08:36 AM   #1636
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Epic lol I love adam! But on a different note of the cars durability Issues. I did finish 2nd at Nats 3 weeks ago with one lol needless to say sadly the other Tamiyawere kind of off pace. I know art struggled and I hhaven't seen that in awhile
Wasn't Michael Bruce (3rd in 17.5) running one too?

Good results BTW!

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Old 08-15-2014, 10:22 AM   #1637
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Also, as a reminder, any of you that said "don't hit stuff" can EAD. Stick to dusting off your shelf queens and posting creepy pictures on tamiyaclub.
I take umbrage to your presumptuous assumptions. I post my creep only on redtube.
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Old 08-15-2014, 11:05 AM   #1638
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Hi Jay

Can you let me know why you want to sand the plastic gears? Is it smoother?

Thanks
Hi,
Just answering your question from a few days ago. Me personally sand them because the steel gears seemed to mesh perfectly and have very little notchiness. I noticed all the plastic gears (especially the two large ones) are quite a bit thicker than the steel ones so by sanding the plastic I figured it would make the plastic gears less notchy.

I know when the white Tamiya gear diff came out Jilles had a video on sanding the plastic gears as I believe the team was having issues with them lasting, sanding the gears seemed to help that.
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Old 08-15-2014, 11:27 AM   #1639
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Good to hear Todd. I'll give the medium sway bar in the rear a try next time I'm at the track! I need to pick up the kit, I'd like a thinner one for the front as well. I've been looking for ways to make the front of the car roll more.

I've got the gumby c-hubs on my car now too while I wait for parts to arrive. On carpet they make the car push and rather inconsistent in the middle of the turn, but like you said, they're easily the most durable c-hub in existence. For practice nights, it's easy enough to abide by.
Hey do you know anyone with an ARC at your track? If so I was gonna ask you to try and see if their chubs work. I doubt there's any at my track but I'm gonna look tomorrow.
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Old 08-15-2014, 02:44 PM   #1640
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Hey do you know anyone with an ARC at your track? If so I was gonna ask you to try and see if their chubs work. I doubt there's any at my track but I'm gonna look tomorrow.
I think a few, really fast, Arc guys will be running at our local track tomorrow. I'll try and get some measurements for you guys. Wasn't the Arc a copy of the 417? Might be promising.

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Old 08-15-2014, 03:04 PM   #1641
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I thought the ARC was a copy of the XRay? Might be worth looking at ARC and VBC c-hubs as possibilities. I think outer pin diameter is going to be an issue though.
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Old 08-15-2014, 03:24 PM   #1642
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I think a few, really fast, Arc guys will be running at our local track tomorrow. I'll try and get some measurements for you guys. Wasn't the Arc a copy of the 417? Might be promising.

- Jose
Sounds awesome Jose. The ARC arms look just like the Tamiya lw short.

Moving onto my Square aluminum chubs. I got them to fit with minimal dremeling. I'll post pics later. I passed out in my chair and now I'm heading into work.
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Old 08-15-2014, 10:13 PM   #1643
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Here are the Square chubs. Like I said before, I won't get to test them out until next weekend on carpet. This weekend is asphalt with the Yok. I will also check out the VBC chubs tomorrow. There are several at the track.

The first pic is where I dremeled the chub. This was all that was needed to clear the double cardans. I did elongate the cut just a hair and on the other side I took the edge off ever so slightly to clear the axle when it went full lock the other way. Not needed I don't think but just in case. It was that close.


Here are two pics full lock to lock and how much clearance is there now.


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Old 08-15-2014, 10:21 PM   #1644
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Also note that the added elongated cut (not pictured) helps the double cardon clear the chub at full suspension compression.
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Old 08-15-2014, 11:13 PM   #1645
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Well, I finally broke something.

Family commitments mean I can't race at my normal (outdoor) track, so went to the other option in town. Indoors, perimeter boards.

I was driving quite well, managed to work from the back of the pack to 1st and was leading for a couple of laps, then bang. Brain fart and smashed the right front into the wall. Fast left hand sweeper and the track has the boards painted the same colour as the run off, I struggled with depth perception.

Big hit. Battery came out. Right wheel looked at a sick angle.

Here's the damage.



And after a quick pull down, all the broken bits. Bottom arm was REALLY broken


Something must be very wrong with these pictures, no broken C Hub!!! Wtf! How did that happen!

Don't worry, next race I fixed that over a curb. And completely trashed the rim on a brand new set of tyres! Doh!


I'm guessing it was stressed from the previous stack, well probably anyway. It didn't look it at the time and nothing was off on the setup station after the first rebuild, so who knows.

I packed up and called it a night then. Lucky these tamiya parts are so cheap. $4 hubs, $5 arms. The damage bill would be double on a yokomo, for example, I worked out.
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Old 08-16-2014, 12:39 AM   #1646
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That's one of the... if not the worst broken arm I've ever seen on any chassis haha. Be proudof that one buddy.

But on a serious note. to do that much damage bending pins and camber links to that degree. U might want to check bulkheads and motor mount and even chassis flatness. Seems like u took a very hard hit. A whole tear down would be required in my book haha
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Old 08-16-2014, 02:05 AM   #1647
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Well, I finally broke something.

[...]
Tamiya has lightened the arms and has managed to now have two weak spots instead of just one. The old reversible suspension arms would bend the hingepin but the arm wouldn't break (ask how I know). This being the case, I gave up buying Tamiya hingepins (which are expensive crap anyway, including the Ti coated ones) and got some tool steel and made my own hingepins. You can also use the spring steel of hex drivers with worn out tips you might find lying about in your toolbox (if they have 3mm shafts). Those are not going to bend ever again, and since the arm breaks anyway, is just as well. I didn't manage to break anything on my 418 yet, but I expect similar problems (which is why I have all the parts ready on hand).

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That's one of the... if not the worst broken arm I've ever seen on any chassis haha. Be proudof that one buddy.

But on a serious note. to do that much damage bending pins and camber links to that degree. U might want to check bulkheads and motor mount and even chassis flatness. Seems like u took a very hard hit. A whole tear down would be required in my book haha
Nah, the Tamiya hingepins bend very easily. A Yokomo pin would take a lot more to bend (yes I know). The old Yok carbon arms would break first. Newer (plastic) arms don't break that easy. Of course, when you bend a Yok hingepin you can't make one from spring steel, because theirs is a weird diameter. That is wny i converted mine to Tamiya sized hingepins and replaced the pins with home made ones as above.

With the Tamiya arms being so skinny, they need to bring out some plastic option or need to get the carbon version right, otherwise there's going to be a lot of arm replacing.

As for prices, I don't think Yokomo would have been more expensive ( I just bought some spares for my BD7). Then again, I buy everything overseas.
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Old 08-16-2014, 02:30 AM   #1648
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That's one of the... if not the worst broken arm I've ever seen on any chassis haha. Be proudof that one buddy.

But on a serious note. to do that much damage bending pins and camber links to that degree. U might want to check bulkheads and motor mount and even chassis flatness. Seems like u took a very hard hit. A whole tear down would be required in my book haha
Cheers! I think!!

And yes, full rebuilt is happening this week. I did stick it on the setup station, including tweak, and it wasn't that bad actually. But yes, strip down happening.

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As for prices, I don't think Yokomo would have been more expensive ( I just bought some spares for my BD7). Then again, I buy everything overseas.
I was comparing prices on Banzai, part v part, tamiya vs yokomo. Tamiya won.
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Old 08-16-2014, 02:45 AM   #1649
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So far i haven't broke any part on my 418 and i do like the quality of tamiya.
The parts are much cheaper then yokomo or Xray, the prices i've seen are twice as the price of a tamiya part.
And i rather have a car with those parts that will take the impact and brake then i would have parts let the impact go through to the chassis part or bulkheads.
From what i've seen in the picture above the cost would be about $15 and it's an easy fix, If it were yokomo parts it would costs easily twice as much.
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Old 08-16-2014, 06:09 AM   #1650
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I can attest to the 46mm stainless and t-nitride hinge pins being junk. In on road I have had ok luck with them but any decent hit will tweak them. I used to run the same pins in my old 501x and without hitting anything--simply landing from doubles and triples they would be bent at the end of a race day. I would literally have to replace them every race day!! So I did the same thing as Niznai mentioned: bought some 3mm tool steel drill blank from McMaster, cut to length, polished and never bent another pin.
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