RC4WD Trail Finder 2 Truck Kit (Z-K0049)
- Wheelbase: 287mm
- Width: 215mm
- Height: 210mm
- Ground clearance: 57mm
- Final Drive Ratio: 31.93:1
with Chevy Blazer Hard Body Set (Z-B0092)
- Wheelbase: 287mm
- Width of Body: 223mm
- Width with Mirrors: 299mm
- Total Length: 502mm
- Total Weight: 1200g
& V8 Scale Billet Alloy Engine (Z-S1043)
- CNC Machined
- Billet Aluminium
- Body Width: 50.6mm
- Body Length: 78mm
- Body Height: 60mm
- Output Shaft Length: 8.5mm
- Output Shaft OD: 5mm
- Gear Ratio: 10.1:1
- Weight: 166g
Words & Images Peter Gray & Stuart Ultimate RC Workshop Markham
Now, I’m no stranger to the RC4WD Trail Finder bloodline. And at last count I’ve built 3 rigs based on two generations of the kit and run a very capable RTR. With our recent SWB TF2 review by Daniel S getting all down and dirty at the RECON G6 UK Edition, I felt it wise to do something a little different with the latest review kit of the longer wheelbase we were sent by RC4WD.
For a start I decided to use the new Chevy Blazer body kit they had recently released. And while I was at it, the Billet V8 engine that replaces the stock motor mount and becomes part of a far more realistic looking driveline. I wanted a rig that while still performing Off Road, would also look cool as a fictitious daily driver, and be something that if I had the 1:1 vehicle as a donor, the time and the funds…would build myself for real!
V8 Engine and Ladder Chassis
The start of any TF” kit build is always the chassis. You first bolt on the mounting points for the leaf springs and gradually build up what is essentially the backbone of the whole rig.
Remember to use Loctite Blue Threadlock or similar on anything that goes metal to metal, but metal bolting onto plastic should be just fine. The chassis braces, front chassis mounted servo mount and shock hoops go on next, and then the plastic rock sliders and side on body mounting points.
Next you fit the upper deck that provides a decent surface area for the ESC, main pack and receiver (or if you want to use it, you can also fit the kits rear splash proof receiver box that mimics a fuel cell). Personally I keep all my electronics on that plate to:- 1: keep all wiring runs as short and neat as possible and 2: So that if needed I can waterproof components myself. Most ESC’s are at least splash proof these days and for a scale rig that’s usually enough. As for receivers, its a simple enough task to use either an old school balloon, or more modern method of Plastidip liquid electrical insulation to waterproof the receiver and if running one, the BECs boards.
My chosen Carisma brushed ESC with crawling mode was already deemed waterproof, as was the Spektrum receiver I decided to use.
V8 Power Plant…(Ok, 35t!)
Next I deviated from the traditional build schedule and took the Billet V8 Engine to bits to fit the 35t brushed motor I had chosen to use. Its a fiddly job but a little patience and lots of tiny bolts later and I was there. I made sure to check the internal gears in the bolt on transmission housing for grease. The R4 Ultimate Scale Single Speed Transmission has a gear ratio of 10.1:1 and perfectly compliments the V8 engine.
One thing to note is that the pinion and gears while being metal are 48DP so run very smoothly but aren’t as tough as the 32dp gears used on other rigs. You must make sure you mesh the pinion and primary gear inside the transmission perfectly, and that you threadlock the pinions grub screw…not doing so and the pinion moving is a big job top rectify…you were warned!
The alloy engine is the perfect way to disguise a 540 sized brushed or brushless motor
The R4 Ultimate Scale Transmission offers a gear ratio of: 10.1:1 and thus improving traction and torque at the axles
We chose a 35 turn brushed motor for this build, the perfect balance between RPM and torque (even more so on 3s!). This ones re-buildable too
Once mated together the separate components work so well together and offer lots of scope to further accessorise and detail the engine inside the Blazers engine bay.
In situ the V8, Holly Rocker Covers and its pancake filter look right at home. Forward weight bias is greatly improved.
The engine was completed with an alloy pancake air filter and some Holly rocker covers. the whole assembly once bolted in place and linked directly to the 1.47/1 ratio Hammer Transfer Case added a real weight forward bias to the rig, perfect for climbing inclines and counteracting (with the use of weighted wheels) the heavier Blazer hard body and thus much higher centre of gravity.
Next my attention turned to the included kit axles. The cast Yota Axles have a ratio of: 2.67:1 and are 176.5mm wide (measured at the hex’s). They, as ever come pre-built, but will benefit from setting aside a good hour to strip, grease and then re assemble using threadlock. You can just fit them but long term you will suffer the loss of bolts and premature gear wear, forcing the need to shim them. You simply bolt on the leaf springs and then they are affixed to the correct points on the chassis, anchoring them in place.
Axles in place, the Ultimate Scale Shocks are fixed on next, and their sleek look (having internal springs) works perfectly in conjunction with the leaf springs and axles. As Daniel Siegl said in his recent TF2 SWB Jeep review, leaf sprung rigs drive so very differently to 4 linked, more traditionally suspension equipped ones. But they look so much more ‘Scale’ and ‘Realistic’!
Remember though that the shocks are not oil filled and have internal springs. A small amount of oil seems to improve their action slightly, and unless over-filled they stay pretty leak free in use, but as ever experimentation is the key word. The leafs themselves have a period of time where they ‘Break In’ and become more supple in use. So we would suggest you let this process happen naturally and then fine tune the oil weight and possibly even the internal springs.
Fuelling Up The Look
Now with the driveline, chassis and mostly stock running gear in place I decided that to give the Blazer body the look of a hybrid street/trail rig on steroids I would need to run bigger wheels and tyres. to this end I fitted a set of RC4WD Fuel Anza 1.7 Beadlock wheels and shod them in soft compound RC4WD Inteco Super Swamper “Siped” tyres, then during the build process adding 1.5 strips of stick on lead weight to each wheel and tyre combo.
Anza 1.7 Wheel Specs
- CNC Machined Billet Alloy
- Nut Cover with FUEL Logo
- Scale Hex Bolts
- OD: 43.8mm
- Width: 24mm
- Neg Offset: 7.5mm
- X2 SS Compound (Super Soft & Super Sticky)
- Inner Ribbing offers Sidewall Support
- Outer Diameter: 114.2mm
- Width: 40.7mm
Once fitted they gave the chassis a slightly higher stance and ground clearance from the stock 1.55 Stamped Steel wheels and Mud Thrasher tyres included with the kit (Again these will be put to good used in a future project). Lastly I added the chassis mounted RC4WD Digital Steering Servo and once built the appropriate steering linkage.
From the front of the rig it offers a nice clean look and a more scale appearance. Yes it does suffer a little from bump steer, but no it didn’t really bother me as its an unavoidable foible you learn to live with when running this type of rig.
The wiring to the receiver may look like a rats nest but that’s the Spektrum receiver I used, It is waterproof and sealed with female ports protruding from it to accommodate male Futaba style plugs. Its a 3 channel RX so allows me to add a winch at a later date, plus there’s the power/batt in. I also opted to put in a 20A BEC kindly supplied by Phil at www.makeitbuildit.co.uk after first snipping and then isolating and insulating the red power wire from the Carisma RC branded Crawler ESC, thus bypassing its built in 5A 6v BEC.
The main reason for this is the possible current draw in Amps from the RC4WD Twister High Performance Waterproof Servo, and the fact that in use it may draw enough current to temporarily cause a Brown Out, even with (as I added) a glitch buster Capacitor!
RCCZ Jargon Buster: A ‘Brown Out’ is defined as when the receivers supply voltage falls below the minimum voltage specified for normal use. What that means in practice is that you will get at the very least unpredictable results, or at worst the link failing between the Tx and Rx and a possible run away unless the failsafe for the ESC is set to zero throttle…you were warned!
With everything in place and the rolling chassis even drivable without it’s shell (yes, I couldn’t resist the good old sofa test!) it was time to move on to perhaps the most daunting part of the build for many…the body shell. Now, I knew that this Blazer body was far more detailed than any I had previously built from RC4WD, and to that end I decide top pay our resident hard body and airbrush maestro Jonathan Potts a visit. He’s more used to 1:1 Custom Cars, Speedboats and other such cool stuff, but his eyes lit up when I handed him the body shell and its box of bits.
My brief was simple:- ”Think classic Street Custom Car crossed with classic Off Road 4×4”…he smiled, and then disappeared into his workshop, past the VW Beetle chassis ready to become a Rat Rod, and the big 1:1 4×4 destined to be a comp vehicle of some sort one day…I drove away and then got on with other projects.
Jonny Did The Buisness
Many, many, parts are supplied in the box with the RC4WD Blazer Body . It has not only a metal hinged opening bonnet (Or ‘Hood’ if you are Scott AceofAxe Curlin), but also a hinged opening rear window built into the removable rear hard roof section over the flatbed, and even an opening tailgate. There also the brightwork, A chrome grille, wing mirrors, door handles and huge front and rear bumpers.
Included with the body kit is also an interior, but for this build I opted to tint the windows and not fit it. I know, I know, I can hear all the boo’s and hisses, but I simply didn’t have the time to get an interior done too, and I also wanted to keep the centre of gravity as low as possible, so any weight I could shed from above the centreline of the axles would be a bonus.
Clean Up In Isle Five…
After a two week wait, I got the call and went to collect the body. “Oh my god” was my reaction. (I hasten to add I did use those three words, but I may have added another…very much an expletive!). John had done what I had asked and, then added his usual flair and personal touches.
After prepping the components he was going to paint he first laid down a deep burgundy, almost dark Autumn cheery red on the main shell, tailgate and bonnet. Then he painted in the side panels with black as an accent colour, but added an old-skool flame into the design and hand outlined the lot in silver. The result, while not being as perfect as using say a vinyl wrap, does look very real and authentic…decals can look too crisp at times.
Next he used a dark metallic brown to paint the rear roof section and a technique that’s akin to rag rolling. This builds up layers of paint and each is then flattened down to create, once top coated an almost leather look to the finished roof. It was stunning. I spent another day painting in window rubbers, adding in the other details like the metal K5 Blazer and Chevrolet badges RC4WD make, the grille detail and a few scale decals (including the RECON G6 ones RC4WD made for our event) and even a RCCarZone logo on the tailgate. Last I fitted the light buckets, painted the stop and turn indicators inside with Tamiya lens colour.
Scale isn’t just about decals, or accessories, or paint, or wheels or chrome. Its about the combination of all the above elements working in harmony together to fool the eye into thinking:- “Real or RC?”. I think we achieved that with this build, and standing back a looking at it in various locations and natural backdrops, it looks stunning.
The final detail was adding the spare wheel and tyre to the tailgate. It just elevates the overall look to one of utter realism. I also ordered some scale number plates from a contact in the UK Scale Nationals Facebook group. They arrived just before we took the truck for its first trail run and outdoor shoot. It was run alongside the new Axial SCX10.2 and the rigs looked so good together.
Out Blazing In The Great Outdoors
I took the rig to our usual test venue in Warwickshire the same day we tested and shot the Axial SCX10.2. It’s a rig that you have to think about when driving, especially until you have fully broken in the leaf springs. You must always be aware that it is far more top heavy than a Lexan rig, but that’s where the fun lies. It’s realistic in both the way it drives and the way it looks, and you can’t say that of most 4-link Lexan rigs. They always seem to perform outside the parameters of their 1:1 equivalents. With the TF2 platform and this quite large and heavy body, you plan each line you take carefully, you see the way the rig reacts to the surface its running on, the angle of the incline or decent you drive it up or down.
With a hard bodies rig factors like Approach Angle, Break Over Angle and Departure Angle become far more critical as they are far less forgiving.
RCCZ Jargon Buster: Approach Anglerefers to the physical angle that If drive up to a object, incline or ramp, you can safely drive onto it without catching the bumper. If the incline is too steep, the rigs front bumper will hit the ramp first, before the tires are able to. The maximum angle (from the ground) that a hill or obstacle can have and that the front of your car can still clear is therefore called the Approach Angle. As for the Departure Angle, exactly the same principle applies, to the rear bumper and wheels of the rig. For any scale rig, but especially a leaf sprung one like the TF2, when coming down off, say, a rock, or a small natural ledge, you have to know how much clearance you have under your car’s midsection, driveline and transfer box. The angle between your tires and the middle of your car’s underside is the Break Over Angle. If you get it wrong, you will end up balancing on a rock like a see-saw with most of your wheels not in contact with the ground.
One of the most important factors when running a rig for fun or in competition is traction, or the grip your tires have on whatever surface you’re driving on. Traction is produced by a combination of factors, by the type of tires you’re using, their size, and the type of inserts you use. Its also about how much weight from the rig itself is pressing down on them to create a contact patch of tread on your chosen running surface and how the suspension aids keeping the tyres in contact with the ground in relation to0 the rest of the rig.
large angles of articulation are out on a leaf sprung rig like this, and a phenomenon I personally call ‘Wheel Float’ becomes a regular occurrence. This is when the solid axles have surface contact and therefore grip with only three (or sometimes only 2!) tyres, and the other wheel or wheels cannot physically articulate enough via the suspensions range of movement to make contact with the ground. Don’t worry though, as You can very quickly get used to this and often use it to your advantage to use the rig to bridge itself between two objects, where a more traditionally spring rig may have fallen in.
Running a single speed transmission means that with a 35T motor fitted, the rig is a bout walking pace on 2S , and a brisk jogging pace on 3S. Run time however is very good and running a 2S 5000 mAh pack granted a good hour of trail running. On 3S you tend to be a little more trigger happy (or is that just me?) and thus run time is affected. 3s does however allow for additional wheel speed when needed, and with a rig of this overall weight you can build up a good momentum to get up a steep incline or even hop up onto a rock or object.
All of these factors are important when running a scale rig and must be accounted for in both its construction, and the way you drive it out on the trail or a comp course.
After 2 packs and just over 2 full hours I called it a day. I loved every minute of running the Blazer and it’s a totally different driving experience to any of my other current rigs. ‘Yes’, you feel a little more ‘concerned. that you will trash the paint on any more technical rock sections, and ‘No’ it didn’t stop me. I left Burton Dassett with a few chips to the paint, but nothing I couldn’t touch up. One thing I did find however is that the rear bumper did rub the body built stock, and therefore I used a cordless Dremal to grind the inner edge by about 1.5mm to offer a little more clearance between the two, then painted the scuffed area matt black to hide the damage.
“Additional Scale Points Go To The Blazer…”
In conclusion, the TF2 kit itself is simple and fun to build. Be as detailed or as simple as you feel you want to go, and take your time to threadlock and metal to metal union and grease all internal gears in both the transmission, transfer case and the axles. Choose electrics suitable for the job in hand, and make sure if possible the ESC, Servo and Receiver are at least ‘Splash Proof. Weight the wheels to lower the rigs Centre of Gravity.
When you enter into a build like this you have to realise what’s involved. It will take many hours to complete but it’s very, very rewarding. Hard bodies will always have the edge over Lexan in the realism stakes as they are solidly constructed and have actual depth to them and their panels. Lexan, while being dimensionally correct will never have this and always seem less three-dimensional. The Blazer is a rig I’m proud to take out to run, or let a buddy do so. It epitomises the scale scene at the moment and is a true snapshot of what RC4WD do best…help RC fans build their dream rigs!
A huge shout out to Tom and the RC4WD crew for the review sample and parts and to RCBitz in the UK for additional help with sourcing wheel weights etc.
- RC4WD Build Quality & Engineering
- Pre-built transmission & Axles
- A truly iconic scale K5 Blazer body
- Be as plain or as detailed as you feel
- A great slow burn ‘Winter’ project
- Drives just like a 1:1 leaf sprung rig
- Not a plastic fantastic rig
- Look & feel of a 1:1 vehicle
- Can take many hours to complete
- Needs Threadlock and re-greasing
- Without V8, engine bay is useless!
For more on all things RC4WD Click: HERE
For RC4WD in the UK Click: HERE