MAXIMUM ATTACK: <br/> Designing A Scion Tuner Challenge FR-S
90 Days & 90 Nights

With the deadline for completion just days away, it’s time we brought you up to speed with our 2014 SEMA Show bound Scion Tuner Challenge FR-S. Firstly, it’s name: MAXIMUM ATTACK. It’s a fitting title we think, not only because it’s instantly recognizable as a Speedhunters slogan, but also because the idea behind the car is track day/vintage IMSA racer. Of course, it’s built to be driven in true Maximum Attack mode too!

The Scion Tuner Challenge (STC) celebrates its 10th anniversary this year, and if you’ve caught our previous updates you’ll know it involves three teams each being given a new Scion FR-S, 90 days and $15,000 towards the build. We’re up against Super Street magazine and GT Channel, and a panel of judges will evaluate the entries and announce the winner at SEMA. There will also be a fan vote element that forms part of the final judging, but more on that shortly…


The Speedhunters STC team consists of three main people. Rod Chong, Speedhunters’ founder, who has guided and focused the vision; Keith Charvonia, Speedhunters’ Technical Editor – who is by far the most important member of the team, currently spending every waking hour (between a day job and his family) to bring this build to life in his own garage with a small team; and myself. I was one of the original Speedhunters team members in 2008 and stayed on until 2012 when I left to start my own motorsport design business. My role in the FR-S build has been to develop the aesthetic and style of the car.


We all have some experience of builds, myself and Rod with Vaughn Gittin Jr’s Ford Mustang RTR-X which I styled; and Keith with a number of cars including his awesome Drag’n Kaiser and more recent Project ZN6 KM4SH FR-S. As Speedhunters confirmed their entry in the Scion Tuner Challenge, Rod and Keith began brainstorming.

Here’s how Keith puts it: “Rod and I started chatting about a theme and throwing out some really wild ideas. I wanted to build a hot rod, really clean with deep black paint and chrome, inspired by the Doane Spencer ’32. Meanwhile Rod threw out ideas ranging from a gasser to a Bellflower custom lowrider – so I would say we covered the full gamut of concepts. As we honed in on a theme it became clear that we both were really digging the idea of a track car, which made sense to us given the FR-S’s roots and physical layout. We started leaning towards a vintage Trans-Am theme, and this was around the time that Andy came on board. His depth of knowledge when it comes to racing and history was an enormous help in nailing down a really solid theme. He took our Trans-Am idea and turned us in the more brand-appropriate direction of a vintage IMSA racer by connecting all the historical dots with Toyota’s 2000GT and Celica cars.”


As for me, I was approached to get onboard the build back in August. Truth be told, I had a pretty packed schedule, but the Scion Tuner Challenge competition has always interested me, and having seen the results at previous SEMA Shows (this year will be my 10th) I just had to find the time. It’s turned out to be a truly international build too: myself in British Columbia, Canada; Rod in Sweden (or a plane) and Keith in Phoenix, Arizona – with a Japanese car and a North American brand. Time to brainstorm and lock down a clear vision…


By this time the team were moving away from a ’60s-style vehicle and more into a take on a ’70s racecar. SCCA, Trans-Am and the newly-formed IMSA were our focal points.

As a massive motorsport fan, it ticked all the boxes for me! I’ve always loved the Toyota 2000GT – it’s a stunning piece of automotive art which competed in SCCA with Carroll Shelby at the wheel in 1968. Initially, this was one of our reference points. Liveries were still in their infancy during this era of racing, which led to clean, uncluttered appearances – and in the case of these Japanese chariots – often in their national motorsport color of white. We would retain this clean look as the project moved forward. While this 2000GT shows a blue hood, the initial intention was to run with the red top of the sister car, as shown in a couple of the early sketches.


The Datsun 510 was another significant car for the Japanese car industry in North America. At a time when importation of Japanese cars was still a new thing, the 510 became an easily recognizable entry in North American motorsport.


One of the common modifications made on these early racecars were chin spoilers. Similar in appearance to the angled devices found on late ’60s muscle cars, these evolved a little and by the mid ’70s eventually wrapped all the way around to the front wheels.


As we looked around at the motor racing scene in North America it became apparent we could improve our build by cherry-picking various ideas from the ’70s and early ’80s. This mood board shows the range of racers that inspired us, and at this point we had started investigating later styles including the Toyota Racing Development (TRD) Celicas of the ’80s. As soon as we started to reference these later IMSA cars, we could not ignore the iconic TRD look which the championship-winning Celica and later GTP cars carried in the ’80s and ’90s. Our build was a Scion, born out of Toyota after all.

Iconic Stripes

We now had a solid theme: ‘A track day level racer, inspired by the early days of IMSA and the dawn of Japanese racers in the States’.

Toyota and TRD first became involved with IMSA GTU (under 3.0-litre) racing in 1981 with a Kent Racing built A40/50 series Celica – albeit with limited success. Rivals, Mazda were dominating with the RX-7 and became the most successful GTU car in its class history. In 1982, The orange, red and yellow graphic made its first appearance on the final year of Kent Racing’s entries (top left above). By 1983, Dan Gurney’s All American Racers (AAR) took over the TRD entry and initially ran the previous chassis before an all new AAR tubular chassis was raced. The success flowed almost immediately.


The new ‘slash’ side graphics were introduced in 1985 and it is this basic appearance which people remember as the original TRD look.


Following 10 class wins, TRD and AAR moved up into the GTO category in 1986 with a 2.1-litre turbocharged 4T-GT engine. The team took a win at Laguna Seca in the first year, followed by the Drivers’ Championship (with Chris Chord) and the Manufacturers’ Championship in 1987.


They should have won the Manufacturers’ Championship in 1988 too, but the sheer number of Roush Mustangs put pay to that and Toyota finished as the runner-up.


Following their success in GTO, the team moved up to the GTP class with the AAR Eagle prototype racecar and won the championship twice during the following decade.


So, as you can see, with the success of the Celica program in Ford and GM’s backyard, it was hard not to pay respect to this success and incorporate some iconic visual cues into the design of our Scion Tuner Challenge FR-S. I made contact with All American Racing and the then Team Manager, Gary Donahoe, along with Chuck Wade who looks after the Toyota Garage Museum in LA. I obtained the correct color codes and other technical info and our direction was further solidified.

As we showcased last month here on Speedhunters, we wanted to pay homage to the TRD look, but do our take on it. The Speedhunters collective voted and as the deadline drew close, the vote went back and forth between Concepts B and C.


Eventually, Concept B won through – but only by a few votes. Thanks to everyone for getting involved and voting! Like the Mustang RTR-X, it’s cool to involve the audience, and that’s something that makes our Scion Tuner Challenge build quite unique.


Despite what you might think, the livery was surprisingly time consuming to resolve. With an ever expanding list of partners we had to wait until the last minute to lock down the final design and placement. For me, there were many late-night visits to the local Scion dealership to measure and triple-check before sending off the artwork ready to be cut and then applied on our car.

Nailing The Details

As for the body work, in terms of 3D form we looked at a couple of approaches including not having a fender kit at all. There was a lengthy discussion driven by Rod as to the merits of the KM4SH kit and if we should buy something else or fabricate something different. An extreme wide body had been an option, but that had been done (successfully) with an FR-S in a previous Scion Tuner Challenge, so we wanted to move the game on. It’s worth noting, the use of the KM4SH kit as a foundation was driven by me – someone who does not have a vested interest in the kit. It also allowed Keith to focus on other areas of the build. This is KM4SH kit #003 and it will be the only one at the SEMA Show this year.

Taking the best of IMSA GTU from the ’70s and ’80s, I wanted a clean and wide look – but without a full extreme silhouette style more reminiscent of later years. Keith suggested we remove the fixings from the kit for a smoother and unique appearance, and that sealed the deal.


As I mentioned, I love the early front chin-type lips and was inspired by those. But this is an area that required quite a lot of development. Due to the FR-S having many complex angled forms – particularly between the main air intake and he outer dummy vents – it was a bit of challenge to get right.


The Scion FR-S Release Series 1.0 with its TRD lip served as the inspiration and I explored a number of ideas including a lower extended section. It looks cool, but you have to be careful it doesn’t look like a big oversized lip! The final design is much cleaner look which extends out far forward of the original front. We’ve already had one company express an interest in a production run!


We’re not going to spill the beans and show every detail of the car now – that’s for the SEMA Show – but there are couple of other areas I’d like to comment on. I’ve always loved JDM fender mirrors and, to be honest, am a little surprised they have not appeared on more modern builds. I thought these would work well on the FR-S – particularly with its fender and hood ‘humps’ at the front. We had to wait a while to find a pair of authentic units which didn’t require a mortgage, but were eventually successful in tracking down an awesome set from a Datsun 240Z!


We also needed to explore a rear spoiler. A duck-tail style device made sense from the outset as these were used on a number of IMSA cars back in the day and were also a popular fitment on the original AE86 with TRD’s N2 item. AeroJacket have recently debuted an extreme duck-tail, which uses the car’s stock bodylines for a great integrated look.


Of course, wheels and tires are a very important component in the appearance of any build too. We spent significant time looking at various designs – from TRD-style units to a modern interpretation of the Celica GTO’s wheels. Panasports and BBS mesh 16-inch wheels were also popular on the race track. We wanted to retain small wheels and have a period look with bulging side walls – particularly at the rear.


This is where we can have some fun. Turbo fan wheels were popular on Porsche 935s in Europe and the IMSA series. These were flat or cool concaved covers, which often replicated the mesh graphic for a dramatic and futuristic appearance. The 1980 Daytona 24 Hour class-winning Mazda RX-7 ran on these wheels, and the similar devices later featured on the Audi 80 GTO quattro and the Porsche 956/962 endurance racer. Outlawed in many series including Formula One, turbo fan blade covers are still in use today; Ken Block even utilising them on his current Fiesta gymkhana car. It’s a look we really wanted to incorporate.


Typical of any build, we did hit a hurdle late on when a wheel company decided they could no longer commit to us. With six weeks to go before our deadline we were in a frantic rush to find an alternative 16-inch or 17-inch wheel. We preferred not to buy something off the shelf – this is Speedhunters and we’re in a competition after all! We reached out to many companies, but size and time were often an issue for this commission. Thankfully, Rotiform really stepped up to the plate and agreed to build us some special wheels at short notice.


While Rotiform produce the BTH which has a similar, but fully integrated turbo fan appearance, we wanted to mix it up and have an open mesh version on the rear. Their multi-piece concave BLQ (above) was a good base for this process, so we’ve had some special one-off 17-inch units produced with a deeper satin chrome lip and retro-style gold centres. At the front, the voids between the mesh patten have not been machined out as they normally would be, but are retained for a unique, period-influenced appearance reminiscent of turbo fans. We did debate mixing the BLQ and BTH wheels, but decided to go this route to retain matching spokes front and rear.


Setbacks come with the territory when you’re building a car, but with Rotiform on board it’s worked out much better than we could imagine. We now have a better wheel design, set up and tire fitment.


There are a number of other interesting and unique details on the build, but we will save that for our next build post. We don’t want to spoil the party just yet…

As I write this, Keith is busy with his team finishing off the build so it’s ready for Scion to collect on Friday. A few more late nights in Arizona and then he can sleep for a week!

A big shout-out for all the partners who have come on board to supply and assist on our Scion Tuner Challenge entry at short notice. Keep following Speedhunters and stay tuned for the Scion Tuner Challenge fan vote, where we need you to speak up!

Andy Blackmore

Keith Charvonia
Instagram: SpeedhuntersKeith

Additional Photography by Mark Windecker 


Scion Tuner Challenge on Speedhunters
AAR Celica Retrospective on Speedhunters
Scion Racing



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Cant wait for the reveal!


This is gonna be soooo bad ass. I really like the louvered hood, with the roots charger poking out, and the 86 number logo in that one picture. Shame you guys decided against it, sweet car nonetheless


I love the design brief and execution methodology! I'm sure the process has been rewarding! For what its worth, I'm behind you 100% and can't wait to see the finished ride!


I'm definitely going to be watching SEMA this year.  I wonder if they'll televise the Scion Tuner Challenge with the rest of the show. Can't wait to see the final result!


sick! can't wait to see it. looks more than 15 grand tho..i wont say nothin.


sick! can't wait to see it. looks more than 15 grand tho..i wont say nothin.


OH Yeah -- I needs me on of those whale tails too!!!!!! LOL


OH YEAH -- -- I needs me one of those whale tails!!!!!! LOL


JohnTruitt I think thats just an air filter, Im not sure I have seen a blower on a modern flat 4


When i read the posts before this post, i was like 'meh'..
But after reading through all the details in this post, i was like 'yyeeeeaaahhh babyyy'. CAN'T WAIT!!!


Why not go with the 15" TRD TOSCO? (i mean tosco styled/inspired)


AmirIzham Hi Amirlzham. We briefly looked at these along with Halibrand style wheels from the 2000GT, but as we moved more into race territory and into late 70's and 80's, these wheels didn't fit with the concept anymore.


JohnTruitt Its not a roots charger, but stay tuned to find out what it is (and still there!). In the end, this sat lower on the engine, so a hole would have been wasted and looked empty.  Louvers remain btw


Front chin-type lips are a winner! Those would sell very well (All the proposed styles). 

If those side vents would be cool if they were a functioning F12 style aero-bridge...


JohnTruitt  There are a number of Roots type charger kits available for the FA20 Engine, they seem pretty popular here in Aus.


JohnTruitt  There are a number of Roots type charger kits available for the FA20 Engine, they seem pretty popular here in Aus.


Just headed to Super Street & GT Channel's websites to see what's cooking, looks like they have some cool stuff going on too! This will be an intense competition!


This build  is insane.  I thought it would be a catalog build, boy was I wrong.
I can't wait for it to be complete

I don't even want to think what the real cost would be without sponsors.


AndyBlackmore Right, can't argue with that. I mean for sure I'm not gonna argue with a motorsport designer/motorsport historian haha. Good luck to your build.


Car is looking absolutely delicious guys, good work!


Where was the female involvement in this build SH?


This build is getting better and better with each post!


The stripes on the trunk thing above the license plate are at the wrong angle.  Instead of / they need to be to continue the curve which begins at the front.


AmirIzham AndyBlackmore hey, its great to get comments and the Tosco wheel is cool.


RacingPast 'if'?  wait and see ;)


@Beany In the end, the stripes in /// direction worked better, and in isolation
due to the angle of the license plate recess and light cover. If they
were not in isolation, then it would be different, but design is
subjective, so always welcome your comments.
If you look back to our earlier post, we did reverse the colors to match the stripes on the roof.


AmirIzham Smallest wheel that fits on an FR-S is 16". Now fit brakes under it.


ATLshine We made Andy wear a wig whenever he worked on the renderings.


GregFentonHNHS Astronomical!


neffgordon Sponsors to the rescue. :)


I like the 70/80's look applied to this car. Really cool design (as usual, coming from Andy Blackmore), simple and a great reminder of Toyota's racing heritage. 

I can't wait for SEMA just for the Scion Tuner Challenge. ...and maybe the new 15' mustang.

I would like to hear more about of the sponsors involvement as they are part of build, like Rotiform building a unique set of wheels for this car. It might be Speedhunter's build but it's also an opportunity for sponsors to showcase some unique (and special) hardware.


I like the 70/80's look applied to this car. Really cool design (as usual, coming from Andy Blackmore), simple and a great reminder of Toyota's racing heritage. 

I can't wait for SEMA just for the Scion Tuner Challenge. ...and maybe the new 15' mustang.

I would like to hear more about of the sponsors involvement as they are part of build, like Rotiform building a unique set of wheels for this car. It might be Speedhunter's build but it's also an opportunity for sponsors to showcase some unique (and special) hardware.


Louch Thanks Louch
Re Partners: Keith is finishing off the car and then the Build Post will follow where we will naturally go much deeper into the technical aspects and many partnerships of the build.


Louch Thanks Louch
Re Partners: Keith is finishing off the car and then the Build Post will follow where we will naturally go much deeper into the technical aspects and many partnerships of the build.


Looks amazing! Wheels and bodykit are perfect.

Just one thing I would add to it are rear Louvres like on this Cars and Coffee BRZ


Yes please


Filip_JDM That would have been cool actually. probably too far away from our race car look, but on point for 70's look.


atflorio andyblackmore Andy is one of those people that makes the extraordinary look effortless - His work has become a staple!


dsceditor I love how he balances the old style with a new twist. He has to be considered one of the top livery designers of the modern era!


atflorio dsceditor thank you guys. Good vibes is very much appreciated


atflorio dsceditor ...and a great example of why I draw and try not to write ; should be 'good vibes ARE very much appreciated'


KeithCharvonia neffgordon  I would say that's cheating but I imagine the other builders in the challenge will have many donated sponsor parts as well... You're all cheating ;)


Can't wait to see this thing finished up fellas.


KeithCharvonia I guess I didn't think about the brakes, silly me.


Looks really purposeful and something you'd love to see sitting on your driveway!! Can't wait to see the mechanical changes though :)


I really love this. The personal touches make this for me, like the Speedhunters dash and the colour coded seats. I love the whole old school racer theme, it is clear to see that a lot of thought and research has gone into this and it has definitely paid off. The KM4SH kit looks great, i really like that rear diffuser. 

Nice work guys!

I can't wait to see the real deal. Please bring it over to the UK when it is done. I'd love to see it up close :)


Jordan_Burgess If you like those little personal touches then you're going to really enjoy looking around the car. We went to great lengths to customize everything. I hope you get to see it in person!


sean klingelhoefer Soon.....


@flushpoke KeithCharvonia neffgordon If life isn't fair for anyone, is it fair for everyone? Ha go hard guys, would be interested in some background on how the budget / adding up is done by the judges. (Pictures a pile of receipts from all your mates with "$1.00 - misc parts" on them).


"I wanted to build a hot rod, really clean with deep black paint and chrome, inspired by the Doane Spencer ’32. Meanwhile Rod threw out ideas ranging from a gasser to a Bellflower custom lowrider"

Would have been interesting to see any of these!


Andy, you're in BC?! I had no idea there was anything/anyone Speedhunters up here at all. Are you in Vancouver?


CrisCiunganu Yes, but outside of Van. Speedhunters started its life in BC many years ago


I  know this is an old post but I was wondering if you could share those Toyota color codes for the strip? I am so impressed with how the car came out Id like to get the strip painted on my dash panel but I'm not sure of the exact colors.