Monthly Archives: July 2018

TRF JMRCA 2018 Report

2018 JMRCA Japanese National Championship (1:10 Electric Touring Car)
July 20th-22nd 2018
Shirakaba 2in1 Circuit, Nagano, Japan

Kiyokazu Suzuki and Takayuki Kono attended the 2018 JMRCA Japanese National Championship to support drivers of Tamiya cars at the event, also taking the opportunity to race a prototype of the TA07 MS.

There was great news in the Open Class, as young speedster Takuma Sasaki and his TRF419XR took an imperious overall victory, following on from his wins in last year’s Sports Class and the Tamiya R/C World Championships. He was fast all weekend, with the top time in three of the six qualifying sessions and second fastest in two more, then putting the opposition in their place with victories in the first two rounds of the final. His victory was the first for a Tamiya car in this class at the JMRCA Japanese National Championship since 2012. Fellow TRF419XR drivers Shuma Shinozawa and Masaaki Honda finished 5th and 6th overall respectively to cap a great weekend.

Kiyokazu Suzuki also competed in the Open Class, achieving 11th overall with a prototype of the new TA07 MS, while in the Super Expert Class, Shinya Shimazaki demonstrated the TRF419XR’s potential with a 9th place overall finish.

Takuma Sasaki TRF419XR JMRCA setup



Tamiya TA07 MS – First CAD Picture

A first look at what the upcoming TA07 MS will look like!

Kiyokazu Suzuki of TRF (Tamiya Racing Factory) tested a prototype of the TA07 MS in the Open class of the JMRCA Japanese National Championship 2018 (July 20-22), at one point rising to 3rd overall in controlled practice before eventually finishing the weekend in 11th place. We are looking forward to translating the data from this promising test into an exciting product.


TRF419 Alu Gear Diff Case Product Info

Full official product info on the soon to be released TRF419 alu gear diff case.

TRF419 37T Aluminum Gear Differential Case

This product features an aluminum version of the gear differential case from the TA07 PRO and recent TRF touring car chassis. Aluminum ensures excellent rigidity and minimizes heating of internal oil for smooth, stable running.

Item Contents/Information
• 37T Aluminum Gear Differential Case x1
• Gasket x1
• 2x6mm Hex Screws x4
• Compatible with TRF419, TRF418 and TA07 PRO chassis cars.


Tamiya TA07 MS First Info

As expected, a TA07 MS version is on its way.

A prototype of the TA07 MS chassis will appear in the Open class of the upcoming JMRCA Japanese National Championship 2018. The TA07 MS takes the single belt-driven 4WD TA07 PRO chassis to a new level of performance.


TRF419 Alu Diff Case Picture

A first picture of the upcoming TRF419 37T Aluminum Gear Diff Case.

42325 TRF419 37T Aluminum Gear Diff Case


Source: Mokei Kagaku

Further Info on New TRF Parts

I already previously posted part numbers and pictures of these upcoming TRF option parts, but now official product descriptions and release dates are available from Tamiya Japan.

42323 Short Ball Connector Nuts for TRF Dampers (8pcs.)

★ These short ball connector nuts are the perfect length for TRF dampers.
★ Crafted in steel, they have a metal-plated finish for super-smooth motion.
★ Use a 2.5mm hex wrench.
– August 11 Japan release


42322 44mm Swing Shafts (Hard) 2pcs.

★ These 44mm swing shafts have durable anodized surfaces and thicker diameter, letting them smoothly handle even higher powered motors.
★ Cross joint attachment holes are shifted 90 degrees for even greater smoothness of drive.
– August 11 Japan release


42321 Lightweight Cross Joints for Assembly Universal Shafts (2pcs.)

★ These cross joints are crafted in aluminum, lighter-weight than standard steel components.
★ They are given a hard surface treatment.
★ Parts contribute to a lighter, more responsive chassis.
– August 11 Japan release


42320 Lightweight Joint Casings for Double Cardan Joint Shafts (2pcs.)

★ These joint casings are crafted in an aluminum alloy much lighter-weight than standard steel components.
★ They are given a hard surface treatment.
★ Parts contribute to a lighter, more responsive chassis.
– August 11 Japan release


42319 Lightweight Cross Joints for Double Cardan Joint Shafts (4pcs.)

★ These cross joints are crafted in aluminum, lighter-weight than standard steel components.
★ They are given a hard surface treatment.
★ Parts contribute to a lighter, more responsive chassis.
– August 11 Japan release





FF Body Test Part 1

Following on from my previous post, yesterday I had the chance to do a first back-to-back test with all these FF bodies.

I’ll try to describe shortly what I found, but will have to do more extensive testing on the most promising ones over the summer.

Here’s the linup I had, with the picture taken from my previous blog post.

The bodies are:

Killerbody Alfa Giulietta 
– this I bought a long time ago when there were not many current suitable realistic  bodies available
– came prepainted, and is multi-piece for realism, but pre-built from Killerbody
– I removed light inserts and other heavy stuff to make it lighter, and added rear wing

Mon-tech Ford Fiesta WRC
– this has been the popular body of choice in Germany for the FF class but I had so far never tested it
– smaller than the others as it is based on a smaller real car
– lexan two-piece rally style rear wing again differentiates it from the rest
– much lighter than the rest
– interesting front shape

3Racing Honda Civic WTCC
– if you have read this blog for some time, you know this has been my FF body of choice since it was released some years ago
– agressive splitter, and a big rear wing very far rearward
– luckily very realistic for a 3Racing product, and the only real current WTCC/TCR body available
– fairly heavy, with especially the rear wing and mounts very heavy and very far back

Tamiya Subaru WRX STI NBR Challenge
– released late last year this is one of the latest suitable bodies available, and being a sedan instead of a hatchback it is an interesting alternative
– while based on a Nurburgring race version, it is actually very TCR-like when it comes to the splitter and rear wing (there is a 1:1 Subaru TCR car as well)

Tamiya VW Scirocco GT24-CNG
– this has been available for many years, and again if you followed the blog you know I run this forever and always until the 3Racing Civic was released
– since the Scirocco is a very special model for me, I even tried to make it more competitive by using the full splitter and adding a 3Racing Civic WTCC rear wing
– the downside of that is that it becomes super heavy

Finally a list with the weight of each bodyshell (painted):

Killerbody Giulietta (with mods described) – 140g
Mon-tech Fiesta WRC – 107g
3Racing Civic WTCC – 136g
Tamiya Subaru WTX STI NBR – 148g
Tamiya Scirocco (with 3R wing) – 161g

The 3Racing WTCC wing assembly weighs 22g, so you can see that the Scirocco in standard form is close to most of the others.


On the Killerbody Giulietta I had no expectations at all, but on track it was a positive surprise. Despite it’s weight it felt fairly light on track, and laptimes and consistency were surprisingly good.


The Mon-tech Fiesta feels very different from the others. It is very nimble on track and it feels very small. You can also clearly feel the lightness of it and this again helps it over 5 minutes as the tyres stay a bit colder. It is not as secure as the other bodies but still faily comfortable to drive. Somehow the car has an M-chassis feel to it when you run this body because of the size and the handling of it.


The Civic I know very well, so no surprises here. A very stable body but still with a lot of steering. Faster on the first lap compared to the Fiesta, since it is more stable (the first lap is always the fastest with the FF’s on our track, but the rear tyres are cold so you need some stability to go fast). Needs to be lighter though.


The Tamiya Subaru WRX STI NBR was again slightly surprising to me. Works very well and is about as fast as the two above. Has good steering but obviously a very different feel to the others. Because of this, you would need to spend more time on the setup to get the most of this body. Too heavy, but a lightweight version is on it’s way from Tamiya.


Forever the best looking bodyshell all categories, the Scirocco is perhaps not quite at the top anymore, but it is still possible to do good results with it. Again too heavy, although a lightweight version has been available. Would also need a lighter suitable rear wing. With this rear wing it is a bit too understeery, and with a smaller one a bit too unstable.


The good news overall is that the time differences between all bodies are very small, at least on this particular tarmac track. Small enough not to be the determing factor at the current level of FF racing. So you can feel free in choosing a body you like.

Towards the end of my first testday with the bodies, I was left with these three.


So I did some more runs  with all of them, and was left with the Civic and the Fiesta.

As I already described above, these are fairly different on track. The result over 5 minutes seems to be very similar though, as this repeated itself a couple of times.

Below, the last run with each body, session 11 is with the Fiesta, session 12 with the Civic.

Gives a pretty good desciption of the characteristics I already mentioned.


What’s needed I feel is a much more lightweight version of the Civic, and especially the rear wing.

Really we need more current TCR bodies, at a decent level, and not too heavy. There are (I believe) currently 14 real TCR car models, with more on their way, so there is no shortage of models to choose from! I so much wish that a few body makers would wake up to this and produce at least a few TCR bodies.

There are of course issues with licensing, but this can be avoided as has been shown by ISTC bodies throughout the years and for example the Mon-tech WRC style bodies. What is important is that the bodies still stay as realistic as possible.

As mentioned I will continue to further test these, and will report any new findings. Thanks for reading! 🙂

FF Bodies to Test

I’m now finally fully into FF testing again. Still for now running the FF2017 project car, which you can read more about if you go back in the archive to 2016. As always it is super enjoyable to run these cars on tarmac.

Over time I have gathered a few bodies I want to test on the FF. I finally got them painted and mounted now so my next test session will be focused on testing these.

So far, my favourite FF body has been the 3Racing Civic body since it was released, and if I was to guess I would say it will still be. Let’s see if I’m right once I get to test these.

My first 3racing Civic bodyshell I wore out last year, so I needed to paint a new one. Just a quick three colour spray can paintjob this time, in the colours of Stian Paulsen Racing.