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-   -   Xray T4'17 (https://www.rctech.net/forum/electric-road/957389-xray-t417.html)

Bar 12-06-2016 03:17 AM


Originally Posted by Geberit (Post 14756520)
They changed the comment! Weird...

Could just be a translation thing, he was using a new Brass motor mount though!

http://ets.redrc.net/2016/12/chassis...uno-coelho-7/#

Can't really see with the battery in

Skiddins 12-06-2016 05:03 AM


Originally Posted by Bar (Post 14758386)
Could just be a translation thing, he was using a new Brass motor mount though!

http://ets.redrc.net/2016/12/chassis...uno-coelho-7/#

Can't really see with the battery in

To be honest, looks like a standard motor mount, but with a brass 'lipo stop' mounted to the opposite layshaft mount

daleburr 12-06-2016 05:35 AM


Originally Posted by Skiddins (Post 14758424)
To be honest, looks like a standard motor mount, but with a brass 'lipo stop' mounted to the opposite layshaft mount

On the underneath shot it looks like the flat motor plate (with the flex adjustment holes) is brass.

Bar 12-06-2016 06:40 AM


Originally Posted by Skiddins (Post 14758424)
To be honest, looks like a standard motor mount, but with a brass 'lipo stop' mounted to the opposite layshaft mount

It also says so :P

gtrmx 12-06-2016 08:16 AM


Originally Posted by Slapjack (Post 14757963)
In addition to that question I have a steering question. My car doesn't turn in as good as all the other vehicles out there and it slows me down tremendously. I pretty much have the box setup. I run on carpet wth foam tires I run 10k diff fluid. Steering is 100% on the radio so not sure where to go from here. Actually I used a setup that changed all the hinge inserts to the middle ones and put the notch on the diffs to the top postion. Messed up the steering a lot. So I put the diffs back to the bottom position and put the .5 inserts pointing outward in the rr and the middle inserts in the rf. for the front I have the .5 outer upper corner in the ff and fr. This helped some but I'm still pushing in the corner and taking the turns wide. I'm running 45% drag brake so the esc does all my braking. I do this cause I can't seem to just give a little brake on the radio it's either nothing or I slam the trigger all the way forward. I can't seem to do like half brake.
Also if it matters the track is kinda small so it's not a fast track. I have the avid alum chasis but wouldn't the carbon chasis be better on carpet? Or not really?

We also use foam tires in our clubs. Foam tires generate a lot of side bite, which causes suspensions to travel deeper when compared to using rubber. Parting from base setup, Go up one or two springs both front and rear and higher your roll centers. Use 1 mm lower spacers under the inside of your camber links. That should render a car that is so much easier to drive. Progressive springs can come in handy here!!

vabroom 12-06-2016 09:57 AM


Originally Posted by OttoKrosse (Post 14758332)
Just finished assembling my t4 17, everything is mounted except the top deck, motor, ESC and receiver. the issue is when I lay it on a setup board I see a tiny bit of light under the front and rear of the aluminum flex chassis that came with the kit (a U.S. kit). It was perfectly flat before I started putting it together. I've decided to not use the center stiffening brace between the servo mount and the motor mount for now, at least until I can get some track time on our asphalt track.

Before applying the protective film I'd like to make it lay flat.....any ideas or input would be greatly appreciated.

Thanks,

I had this problem also, the flex alum chassis that the US gets is 0.25mm thinner causing some screws stick out on the bottom of the chassis. For me it was the flex motor mount (the long one that connects to the motor mount) that cause the problem. I use a dremel and a countersunk bit and cut a small countersunk on the bottom of the flex motor mount and bottoms of any part (bulkhead, suspension, etc.) just to make sure. Takes about 15 minutes to do. Hope this helps and makes sense.

caffeine357 12-06-2016 10:36 AM

Ill post here because the T3 forums seems to be super dead. What is the best racing body you guys have found to work for indoor racing in the VTA class? im messing around with a few different ones right now and trying to find a good mix of durability and not being super wide.

TryHard 12-06-2016 03:04 PM


Originally Posted by daleburr (Post 14758448)
On the underneath shot it looks like the flat motor plate (with the flex adjustment holes) is brass.

Yup... and also longer (one extra screw hole back) than the standard one. Compare Alex's chassis with Bruno's. Think Francesco has been busy... :sneaky:

Other thing that stands out on the setups they both ran are the wheelbases are fully forward (arms with 2mm shims in front). Speaking with Alex, arms all the way back on carpet is to make the car more stable and less twitchy on high bite conditions..which makes sense given they also used brass FF blocks to.

Skiddins 12-06-2016 05:06 PM


Originally Posted by TryHard (Post 14759070)
Other thing that stands out on the setups they both ran are the wheelbases are fully forward (arms with 2mm shims in front). Speaking with Alex, arms all the way back on carpet is to make the car more stable and less twitchy on high bite conditions..which makes sense given they also used brass FF blocks to.

That seems to have been a staple of their carpet setups for quite some time.
Sometimes I've liked it, and sometimes not.

Dan Hamann 12-06-2016 06:08 PM


Originally Posted by OttoKrosse (Post 14758332)
Just finished assembling my t4 17, everything is mounted except the top deck, motor, ESC and receiver. the issue is when I lay it on a setup board I see a tiny bit of light under the front and rear of the aluminum flex chassis that came with the kit (a U.S. kit). It was perfectly flat before I started putting it together. I've decided to not use the center stiffening brace between the servo mount and the motor mount for now, at least until I can get some track time on our asphalt track.

Before applying the protective film I'd like to make it lay flat.....any ideas or input would be greatly appreciated.

Thanks,

The belt tension is pulling the chassis ends upwards, presumably. Car should detweak when you screw down the top deck, would recommend using a tweak tool of some sort, or just use a Hudy toe plate for the setup station to apply pressure to both shock towers while tightening the top deck screws down in a cross pattern.

Slapjack 12-06-2016 08:21 PM


Originally Posted by Dan Hamann (Post 14758085)
Ultimately and unfortunately, you are in uncharted waters more or less. The last touring car that Xray designed around foam tires was about 6 years ago, and the norm since then has deviated away from foam tires. If you could post a full setup of what you are running, as well as pictures of the track/ track surface (you say black carpet, is this the new CRC FT2 carpet?) and potentially a video of some sort, I think we could start steering you in the correct direction. However, I would agree right away that an Xray Solid chassis would be ideal, as well as running the screws and spacers for the layshaft mount, and the stiffest settings for the center brace.

I tried running the box setup pretty close except for the hinge pin inserts. I'll post pics of the car tomorrow when I get to work. But I just pulled the shocks off and there is 2.5 springs front and rear and I think I was about 300 and 450 weight oil: but let me know what oil and springs you think I should try? And also what hinge pin insert locations

chiefj48 12-06-2016 08:49 PM

Anyone have a new carbon fiber chassis 301142 2.2mm that they would like to trade for my new 301123 aluminum flex 2.0mm chassis?

niznai 12-06-2016 09:03 PM


Originally Posted by vabroom (Post 14758724)
I had this problem also, the flex alum chassis that the US gets is 0.25mm thinner causing some screws stick out on the bottom of the chassis. For me it was the flex motor mount (the long one that connects to the motor mount) that cause the problem. I use a dremel and a countersunk bit and cut a small countersunk on the bottom of the flex motor mount and bottoms of any part (bulkhead, suspension, etc.) just to make sure. Takes about 15 minutes to do. Hope this helps and makes sense.

You mean you cut the countersink around each and every screw hole in the alloy bits?

vabroom 12-06-2016 10:00 PM


Originally Posted by niznai (Post 14759493)
You mean you cut the countersink around each and every screw hole in the alloy bits?

Yes, I only needed to do the bottom of the flex motor mount (I think that's what it called) since the chassis would rock left to right and right to left on a flat surface. I dremel it lightly for 2-3 seconds for each hole just enough to have a small countersunk where the screws enter. I didn't have to do the bulkheads and suspension parts but I did.

niznai 12-07-2016 05:30 AM


Originally Posted by vabroom (Post 14759521)
Yes, I only needed to do the bottom of the flex motor mount (I think that's what it called) since the chassis would rock left to right and right to left on a flat surface. I dremel it lightly for 2-3 seconds for each hole just enough to have a small countersunk where the screws enter. I didn't have to do the bulkheads and suspension parts but I did.

Xray machining is pretty "clean" I don't imagine they would have left any swarf or ridging from drilling, but who knows?

In the past each hole would have been drilled and chamfered thus avoiding the need to do this yourself. This was standard on every part and left perfectly flat surfaces.


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