Author Archives: kentech

TRF419 Alu Diff Case Picture

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

42325 TRF419 37T Aluminum Gear Diff Case

42325_prp

Source: Mokei Kagaku

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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

42323p

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

42322p

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

42321p

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

42320p

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

42319p

 

 

 

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.

FF_bcs

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.

ffbt_a1

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.

ffbt_f1

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.

ffbt_h1

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.

ffbt_s1

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.

ffbt_vw1

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.

ffbt_aa

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.

ffbt_btr

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.

FF_bcs

FF_bcs2

3R_C2

LapMonitor Timing System

Having grown tired of my old practice lap timing system, I wanted something new that worked together with my phone. After some research, the product that appealed most to me was the LapMonitor Training kit.

I decided to order one of these, as live laptiming is not available on all tracks, and doing any useful testing is impossible without a reliable timing system.

Here are some key features advertised by LapMonitor:

  • Multi-user lap-timer for RC cars and motorbike
  • Accurate and easy to use
  • Start a race or a training in less than 2 minutes
  • FREE Android and IOS application
  • Multi-language (FR, DE, EN, IT, SP, PT)
  • Spoken Lap-times, live race commentary
  • Share, export your results
  • Wireless, range up to 80m
  • Low power, up to 150 hours race time with 2xAAA Batteries
  • Designed and made in France

As I mentioned already, the key for me was the Android app, with the spoken lap times also a welcome feature when testing things on track.

My order arrived super quick, and the support from LapMonitor was very good from the start.

Let’s then take a look at what you get in the training kit. Different versions are available in the LapMonitor shop.

The kit comes in this simple box.

lapmonitor_b1

With the different items placed in separate compartments.

lapmonitor_b2

Here in the picture below you see the full contents of the LapMonitor Training Kit (JR).

As listed on the LapMonitor site, these are:

  • 1 LapMonitor
  • 1 Support
  • 1 Tripod
  • 1 Transponder with JR connector
  • 1 Male-female 15 cm JR extension

In addition, in the kit received were these items:

  • Another different tripod
  • 2 x AAA batteries for the LapMonitor
  • Sticker + some small accessories

 

lapmonitor_b3

A closer look at the transponder.

The transponder weighs 6g, and measures 25x16x10mm, and is very easy to mount due to its shape. The transponders are obviously available separately as well.

lapmonitor_b4

Here, the LapMonitor unit is held by the support, then mounted to the smaller tripod, in the way you place it beside the track you’re driving on. The unit is powered by the two small AAA size batteries included, and turned on by bluetooth from the app on your phone.

lapmonitor_b5

Another view of the LapMonitor and support, here mounted to the larger tripod.

lapmonitor_b6

I received my LapMonitor just as I was to leave for a testing session at a track far away, so I had no real time to get familiar with it before the test. This was not a problem though, as the app and timing system is super easy to use. The system also worked reliably throughout the day with no problems, so it very much did what it was supposed to do.

As far as I understand, LapMonitor is a very small one-man project. There are for sure lots of features that can be added and fine tuned to make the product even better. But that’s the great thing about a product like this; The fact that the app can be updated (and is being updated) constantly with more new features and improvements through user feedback.

Overall a very positive experience, and I will continue to use the LapMonitor whenever I go testing on a track with no live timing.

TRF419 Aluminum Gear Differential Case

Coming soon from Tamiya:

42325 TRF419 Aluminum Gear Differential Case (37T)

42325pg
(picture is simply a parts drawing of the standard TRF419 diff cases)

Pictures of New TRF Parts

Low quality pictures of the new TRF option parts I wrote about some time ago.

42319 TRF Lightweight Cross Joints for Double Cardan Joint Shafts
42320 TRF Lightweight Joint Casings for Double Cardan Joint Shafts
42321 TRF Lightweight Cross Joints for Assembly Universal Shafts
42322 TRF 44mm Swing Shafts (Hard, 2 Pcs.)
42323 TRF Short Ball Connector Nuts for TRF Dampers (8 Pcs.)

42319p42320p42321p42322p42323p

Source: Mokei Kagaku on Facebook

New Mugen MTC1 Option Parts

Great to see this activity from Mugen on the MTC1 project, with some much wanted new parts.

A2230-B  Diff. Gear (H.D.)

The new HD differential gears are made with a new material to improve the durability.

This allows the differential operating smooth over a long period of time and keeping the oil in the differential clean.

mtc1_A2230-B

A2234  S5 Soft O-Ring (Red 50°)

This is a set of ten S5 Soft differential O-rings, are intended for use with MTC1.
These O-Rings are used as seals on the differential outdrive.
Since the differential operates more smoothly from the early stage or
from the extremely slight operation, the new soft o-ring allows more smooth
direction change at corner entry and improves the stability at corner exit.

mtc1_A2234

A2523  SP3 Soft O-Ring (Red 50°)

This is a set of ten P3 Soft Shock O-rings, are intended for use with the MTC1.
Since the suspension moves more smoothly from a very small amount of
movement, this allows reducing the friction of the shocks and improves the
stability in corners.

mtc1_A2523

A2309  Steering Collar

This is aluminum collar for connecting A2301 (steering shaft) and A2307 (Servo plate).

Improves the steering response at high grip carpet track and stability at the place where the road surface is undulated.
Note: The steering may decrease if the grip of the track is not enough.

mtc1_A2309

New TRF Parts Releases

Some welcome new TRF parts announced by Tamiya.

42319 TRF Lightweight Cross Joints for Double Cardan Joint Shafts
42320 TRF Lightweight Joint Casings for Double Cardan Joint Shafts
42321 TRF Lightweight Cross Joints for Assembly Universal Shafts
42322 TRF 44mm Swing Shafts (Hard, 2 Pcs.)
42323 TRF Short Ball Connector Nuts for TRF Dampers (8 Pcs.)
42324 TRF TB-05 40T Aluminum Diff Housing

trfbanner

FinTrack Round 5 – 2018

So I finally did an outdoor race again! Last time was two years ago in 2016, and I had not actually run the TRF or any ISTC car outdoors since then. This was therefore also my first run with the TRF419XR outdoors.

I only made the final decision to go a couple of days before. Luckily I made the effort to go there (Kouvola – 450km away), luckily the weather was great, and luckily I even had the chance to get a few runs on the Friday before the race on Saturday.

The first runs were awful, showing the lack of asphalt track time, but also a lot of pollen making track conditions tricky.  But it got better with each run, and on raceday the conditions were decent enough for a good race. I was plesantly surprised by how well it went after such a long break. I qualified 7th, and finished 8th, after one good and two bad finals.

Obviously I tried a few things and did some changes, but the base setup I run was very close to where I ended up with the 419X back in 2016. As it has always done, indoors and out, the 419X(R) worked really well and was easy to drive fairly consistently, despite the obvious lack of running.

Of the new bodies, I settled on the Bittydesign JP8 for the race, as I felt it was fast but also easy to drive consistently.

Now I’m really looking forward to do more testing!

Here a few pictures and my setup. Click setup for PDF.

kb_kypak20182

kb_kypak20181

kr_kypak260518

TRF419XR_setup_k_kypak260518