GPM Drift Alloy Suspension Arms for TT-01 – important update!

Saw these parts on eBay and thought they are an essential upgrade for any TT-01 drift machine, however, not all is good so read on…..

UPDATE: Ensure you have the TT-01D chassis for the parts described below.  I have a few TT-01 and TT-01E chassis but the LOWER ARMS WILL NOT FIT! They are a different design, look really closely at the pics for the LOWER arms on the eBay links below.

However, the UPPER ARMS DO fit the TT-01 and TT-01E chassis.  So far I haven’t found they offer much in the way of camber, possibly about -2 degrees, which is good for racing…..if you just want to show of with -10 degree of camber these aren’t the parts for you!

Now for the even worse news.  I order two sets of the Upper Rear Adjustable Arms as I have two TT-01s I wanted to fit them to both.  The front adjustables work fine as above, but really don’t offer much in the way of being ‘adjustable’ as above.

The problem with the rears is that as standard, they offer no more camber than the standard GPM Upper Rears Alloy parts, and when you try and adjust them you will find you can’t.  Due to the way they are made, similar to the plastic version, there is a centre screw holding the two main pieces together and you are supposed to just tighten it all up – and this is where it goes all wrong…..

The problem is the alloy is weak by it’s nature, and the screw is of poor quality, so once you start to tighten to get the camber you want, they break with little force.  I then tried to saw the ends of the screws so they’d end up shorter and therefore offer more camber, I filed the ends to make sure they would go smoothly in.  Started off with no problems and then the main piece just threaded…….first piece of junk created.

I then tried tightening the screw, which itself is an issue since it’s only 3mm, and there aren’t many 3mm spanners around my house at the moment and again, things just went wrong with threading issue.

After that it was just frustrating, you can’t screw these far enough as standard, if you try and modify the parts are too weak to cope with it, and when you modify the results are awful.  I tried 4 different rear upper arms and only one work to a degree, but even that’s threaded inside because the arms are at an angle.

Once I fitted the one that worked, the driveshafts then became a problem because once you push the camber in, they are too long.

Basically, this grade of allow can’t cope with 2mm screws, it’s just not strong enough, and the middle screw isn’t one of high quality.  Even GPM’s pic below shows the Uppper Arm on the right is bent!  This is a disappointment from GPM as everything else I’ve had from them has been perfect……

My plan is to now get a TT-01D and test the parts on that……..

Damage parts are below so you can see what happened, with the one successful one I made.

eBay seller UKRC has the cheapest parts and delivery, I’ve used them in the past and the delivery is fairly quick too.

Click here for UK RC’s shop

The Upper Rear Adjustable Arms are here, part code from GPM is TT057D

and the Upper Front Adjustable Arms are here, part code from GPM is TT054D

I have seen a set of lower adjustable arms for front and rear, but I will trial these first and see if they’re actually required……

GPM Adjustable Alloy Front Arms

GPM Adjustable Rear Arms

Budget Drift Tires! TurboHobby DC-3 and DS-F2 Drift Tire Sets

Whilst hunting around on eBay I found these REALLY cheap drift tires, full review as you read on……..

Click here for eBay seller details and shop

This eBay seller is a really genuine and nice guy, these prices are amazing considering the tires themselves are actually very good compared against Tamiya drifting tires, which I find rather frustrating because they are expensive and slow compared with these TurboHobby versions. In fact, they’re so good I’ve just ordered more! The ultra high speed tires are on their way as I type so I look forward to testing them.

Full Description;
Turbo Hobby DC-3 Drift Tire Set
DC-3 compound is for Medium speed drift.
DS-F2 compound is for medium/high speed drift
Made from injection mold.
Rounded & polished edges for better drift on corners.
No glue require to install.
Compatible with 24mm width wheel

Fitting;
Both types mentioned are easily put on the rims, but I found that some ‘encouragement’ was needed. They are such a tight fit that it meant leaning my whole body on them but they went on in the end – so that’s what the ‘no glue’ bit was about……! Also, I noticed some trimming maybe necessary on the inside of the tires just to get a flush fit but this is not an issue, especially at this price.

Driving;
I tried both the DC-3 and DS-F2 on a TT-01 with a 15T motor and another one with a Brushless motor that’s equal to a 5T. Both gave very predictable handling on tarmac, and the different compounds suited each car meaning the Brushless TT-01 was drifting in huge arcs, and the 15T TT-01 was great for tighter corners. It’s great the multiple compounds are available from the same manufacturer as it will make it easy choosing which tire you need for different surfaces.

Incidentally, both were tried on carpet and given the space I was in they were WAY more controllable than the Tamiya drift tires, so bear that in mind if you drift indoors!

On the car the they look great, and I’ve added some pics below to show what they look like on the cars, along with wheels you can get from the same eBay seller here.


Heatsink / Brushless Motor – avoid the wrong kind of burnout…….

So, after a bit of error before the trial, there’s something to note before you add a shiny new 5.5T motor with an equally shiny heatsink.

Brushless motors come with three wires (in case you weren’t aware) and instead of being soldered at two separate points like Brushed versions, they are together and on the same piece of circuit poking from the side of the can.  This makes positioning ‘interesting’, but the actual soldering is not hard to get wrong as it doesn’t matter which wires are attached to which solder points.

What is key, like anything electronic, is to make sure wires and opposing electrical currents don’t cross!

So, if you intend to heatsink your Brushless motor, which is highly advisable, make sure the heatsink and solder points don’t touch.

This is a simple mod, so get inventive, but this example below shows piece of double sided foam tape normally used for mounting hooks on walls (or LED wiring looms in RC cars)…..just make sure that heatsink can’t get near those solder points!