TT02 FRD: Swapping Eagle Parts to Reduce Front End Play

I really like my Eagle Racing TT02 FRD, and plan on keeping it for a while. If I have one main complaint about the chassis it is the excessive amount of front end slop it has. I have changed rod ends, and shimmed up places as much as I could, but there are some things that can't be fixed as easily without causing binding. The stock upper arms are one of the main culprits here. Despite having a seriously long pivot shaft, the arms were designed too narrow, and due to manufacturing tolerances, this created a lot of slop in some cases.

I think Eagle listened to it's customers and team drivers, and chose to make this better on the new TT02 RWD chassis that was recently released.

Product Showcase: Usukani Front Bulkhead for Sakura D4

Usukani has released several great upgrade parts for the Sakura D4 in the past several months. One great part that seems to have gone unnoticed by many is the Front Bulkhead. It is a great mod, and provides multiple benefits to the the D4 chassis.

Product Showcase: Usukani Rear Shaft Conversion Kit for Sakura D4

There is no doubt that the 3 Racing Sakura D4 has taken off since it was introduced. The same can be said for Usukani. This young brand has gained interest and momentum worldwide in a short amount of time. They have put a lot of focus on the Sakura D4 and are delivering unique upgrades for this popular chassis. Usukani's latest and most significant upgrade to date is the Rear Shaft Conversion Kit for the Sakura D4. They are producing it in Pink, Black, Silver, Yokomo Blue, and Red. The USA pricing on this little gem is a mere $78.

This kit is very comprehensive, and replaces the entire rear drive section and bulkhead on the D4.

It comes packaged neatly, and protects the finish on all the parts nicely.

Designing a New Style of Wire Retainer

One of the things that I haven't used in my chassis builds up until now is motor wire retainers. I like the look of them, but don't care for the cost. Once I have my motor wires all done up neatly, what do I do with the sensor cable? Recently I gained access to a 3D printer, so I thought I would work on a better wire retainer design as a first project. Someone may have already done it, but I have not seen a design that also retains the sensor cable. So I modeled up the design in Solidworks, and printed out the first prototype parts.

Sakura D4: Suspension Blocks and Rear Lower Arms

A lot of time has been spent de-anodizing (pink) and polishing aluminum parts on this chassis, and hopefully this will be the last batch for a while. It is really time consuming.

I would have done these mods earlier, but had to wait for some of the parts to be in stock. The suspension blocks are from 3 Racing and the rear arms are Yeah Racing D3 arms. As mentioned in an earlier post, I like the D3 arms because of the narrower track compared to the D4 arms, giving a little more adjustment range by using spacers and/or wheel offset. This is a short term solution while I am waiting for Usukani to release their new rear arm design. Hopefully soon...

Sakura D4: New Dampers, Aluminum Parts, New Gyro, and New Screws

I've really been enjoying the D4 so far, and the more I work with it, the more I like it. 3 Racing made a nice step forward over the D3 and now that factory upgrades are starting to filter through the pipeline, essential upgrades can be completed.

The first order of business is taking care of my main gripe with the stock chassis... steering wipers.

Product Showcase: Usukani Tube Style Turnbuckles

One of the interesting products offered by Usukani are these neat tube style turnbuckles. They come in several standard lengths; 23mm, 27mm, 33mm, and 39mm. They also come in the following colors; Pink, Purple, Red, Gold, Tamiya Blue, Yokomo Blue, Silver, and Black. They have internal threads that work with plastic rod ends. Usukani recommends using them with Yokomo rod ends, but I was able to make them work just fine with my 3 Racing parts. I think they will work with other brands as well, but I have not been able to test them personally.

I chose the 39mm Silver version for my Sakura D4 rear upper turnbuckles. As you can see in the comparison with the stock turnbuckle assembly there is plenty of thread engagement, and adjustment range. They should be very strong, too. The turnbuckles can be adjusted with a 5.5mm tool, on the flats, or there are a couple of small holes through the middle that a small hex tool can be used in. There is also an identifying band machined in one end to designate left-handed threads, making it easy to know which way to adjust them.

The Usukani tube style turnbuckles add a nice extra bit of style and functionality to your drift chassis. They should look really good once I have some more aluminum upgrades on my own chassis.

Usukani D4 Carbon Option Set: Completed Chassis Gallery

As promised, here is a gallery of the completed Usukani Sakura D4 Carbon Option chassis set. I really love the look of the black version. It matches great with the de-anodized aluminum parts and I almost don't want to finish adding the electronics.

Before I assembled it though, I took steps to keep it looking good...

Usukani D4 Cabon Option Set: Overview and Detailed Pics

Usukani recently released their carbon option set for the 3 Racing Sakura D4. It's available in either black or silver carbon. Both look great, and I chose black for my build. The set includes the main chassis, upper deck, front and rear shock towers, front bumper support, rear battery mount, and a spur gear holder.

The main chassis looks really nice, with a good carbon pattern. It has nice styling with some relief cuts in various spots on the bottom of the chassis. It is 3mm thick vs. the 2.5mm thickness of the stock chassis. The machining is clean and consistent, and all the countersinks are nicely done.

Sakura D4: Smoothing Up the Drivetrain and D3 Rear Arm Swap

The D4 has been a solid runner so far, but that doesn't mean I should stop trying to improve on it a bit. Like everyone else, I have been waiting for 3 Racing to finally release their upgrade parts for the D4. I desperately want to replace the plastic steering arms with some aluminum parts. I'll probably try out some of the rear suspension mods that they have coming as well. In the mean time, I did a few mods with some parts that are already available.

PiPES Backfire Unit

I recently purchased a PiPES backfire unit, and really love this thing.

They can be purchased in a variety of configurations as single or dual exhaust, and include a pair of red LED functioning brake lights.  I chose a 12mm single exhaust for my soon to be completed S13 project.

The way it works is pretty awesome...

Sakura D4: Steering and Suspension Mods

As of right now, 3 Racing has not released any upgrade parts for the D4. But that doesn't mean some simple improvements can't be done in the mean time. I noticed that the center link in the steering has some flex as the angles get closer to full lock. It would have been nice if 3 Racing made a straight link for the RWD kits, but I am sure that keeping parts to a minimum is what helps keep cost down. Another problem with the center link is that it is a fixed length, so Ackermann cannot be adjusted. I made a center link out of two Sakura shock ends and incorporated an adjustable turnbuckle.

You have to make a little room for it first...

Sakura D4: Got lock?

I really like the design of the D4 overall, but as I have mentioned earlier, I feel like the front lower arms are just a little too big in diameter.  The insides of the wheels hit at full lock, and can stop the wheel rotating, inducing a spin.  I was able to gain a little more by adding 7mm hexes and 1mm spacers to get some decent angle, but the wheel still hit pretty easily.

Here is what it looks like with the wide hexes.  Not bad, but the wheel is hitting the y-arm at this point.

TT02 FRD: Changing the Rear Gearing

After initially running my TT02 FRD with the recommended 10.5T motor, it seemed a little slow even with the timing bumped up.  Eagle hasn't released an alternate gear set specifically for the TT02 FRD, but they do have a countersteer gear set for the regular TT02.  By adding the TT02 FRD Joint Cup Shaft to the countersteer gear set, you are supposed to be able to use those gears.  The stock gears on the FRD are 39/15.  The CS gears are offered in 27/16 , 25/16, and 22/16.  I received all the parts that are required, and they can be made to work, but it is not a simple "drop in" operation.

The Joint Cup:

TT02 FRD: More Bling from Eagle Racing

Been doing a few more upgrades to the Eagle Racing TT02 FRD.  First up is a nice, heavy duty servo mount.

It is really nicely made, comes with all mounting hardware, and best of all...