December 2, 2025

Catanzani from Ripoll in early 1:8 Worlds seeding

Having taken the overall TQ at the 1:8 GT World Championship in Chile back in September, it is Serpent’s Andrea Catanzani who leads the way in early seeding at the IFMAR 1:8 Onroad World Championship from Maxime Ripoll, the French Xray driver impressing onlookers with his speed here at the large Club de Aeromodelos de Chile track in Santiago.  With Catanzani the benchmark in free practice, the Italian carried that momentum into the first of the four seeding rounds with a best time of 55.443 over 3-laps with Mugen Seiki’s Simon Kurzbuch his closest rival with a 55.459 as team-mate Shoki Takahata complete the Top 3 ahead of Ripoll.  With changing track conditions the biggest challenge for drivers, as things hotted up after the first seeding on a cool track, it was Ripoll who had everything perfect to go fastest with a 55.499 just ahead of Takahata.  Making a changed that didn’t do what he expected, Catanzani was 3rd fastest ahead of the Mugen Seiki of top British racer Alex Thurston.  One of the pre-race favourites coming into the 44th running of these championships off the back of a championship winning ENS season, it has been a tough morning for Capricorn’s Toni Gruber,  the German experiencing engine issues in both runs.  While the car runs fine in the warm-up out on track it loses power and when they pit they find the plug is bad leading them to believe, having had the same problem twice, that a bad batch of glow plugs is the issue.  The 2023 1:8 GT World Champion will be hoping plugs from another batch will give him a change to seed strongly over the final two practices round for tomorrow’s start of qualifying, each driver’s best two points finishes from the four rounds determining the order for the heats.

Summing up his morning Catanzani said, ‘The first one was good.  The second one we tried something different because we know the track is always changing condition but it didn’t work like we expected so we just finish the practice and got third.’  He continued, ‘We know what we have to do for the next one.’  On his pace since practice started for the event on Friday, he replied, ‘the car is really good, especially in the morning, there is no wind and the track is still cold but then in the afternoon the wind starts so the car is a little bit sliding in the rear and also because the track gets more hot.  We are still finding the good set-up for this.’  The only leading contender to have previously raced here, asked if his GT experience was an advantage, he replied, ‘Only maybe for the first day because when the fastest guys arrive on track they need less than 1-day to learn the track.’  Ask about the technicality of the track for 1:8 Onroad, the 1:8 GT drivers loving the layout and size, Catalan said, ‘It’s not simple because there is also bumps you beed to avoid so it’s technical and fast.  If you stay near the white markings you are fast but if you go too much and hit them you loose time, it is a fine line.’

Racing 1:8 Onroad competitively since 2017, Chile is Ripoll’s 3rd World Championships.  With Fontana in 2019 very much a learning process, 2-years ago in Japan he looked on target to bump up to the Semi Finals until a tyre problem put him out of contention.  With a European Championship podium finish to his credit, the 19-year-old is now making a strong impression in Santiago.  A 2-time French National Champion, he said his car has been working well and unlike his rivals doesn’t seem to be as affected as much by the day’s changing track conditions.  He explained, ‘we came here with a base set up and just made some little adjustments like the shock oils and springs, the flex on the radio plate, and the roll centre, but really small changes.  For me the car is good all the time.  We change nothing compared to this morning.’  The Max Power driver added, ‘We won’t change the car for the next one but we might change engine just to test and to preserve the best one.  I already have two good engines ready to go.’  Asked about the track, Ripoll said, ‘It is super big, super fast, and while I like it I prefer a little track and a more technical track. For me this one is easy, maybe too easy for a World Championship.’

Giving a run down in the first half of seeding, Kurzbuch said, ‘It could be better.  In the morning run we had a bit of understeer in the car but the rest was good.  For Round 2 we changed to another engine just to try everything but the setting was too rich and I could only do my fast laps at the end with the engine still too rich so we could not be competitive that one’.  Overall the 2015 World Champion said their program is going good and they have learned a lot and ‘what we have seen so far is like in almost every heat someone else is the fastest, someone gets everything right for the conditions and set-up.  I think that is the difficult part for qualifying to try to get every run everything perfect.’  On the changing conditions, the Swiss driver explained, ‘First of all the first run is cold and no wind, the second run is no wind and hot, and then we start with a little wind and hot, and then we have hot and a lot of wind, that’s the daily programme.’  On the layout he described it as ‘fun to drive, it’s perfect, it’s a good track.’

Team-mate Takahata felt the balance of his MRX7 was better in the second round due the track conditions having not made any set-up changes.  Happy with how his car has been running since arriving here for practice, the 2019 World Champion is however not a huge fan of the track finding it completely alien in terms of size compared to the much smaller tracks he races on in Japan.  Taking his World title win in the US, he said the CACH track is bigger than the now no longer existing Steel City RC Speedway in Fontana.  On car set-up he said he doesn’t plan to change anything highlight that with the track so different each run it is hard to know if the change worked or it was the track.  Overall the 27-year-old is  happy with his pace describing the new car, with which he just recently won the Japanese National title, as ‘very good’.  Making the switch from long time engine sponsors O.S to reigning World Champions Max Power this season, he said the Italian engines are ‘super strong’ here.


December 1, 2025

A decade on – life is different, but the drive & focus on winning in Chile are the same for Kurzbuch

2025 marks a decade since Simon Kurzbuch became the Champion of the World.  A driver Red RC have had the pleasure of following on his journey up through the ranks and into 1:8 Onroad racing history books, we first got to know him through the early days of the Euro Nitro Series and as one half of the talented Swiss racing duo that was himself and Silvio Hachler.  Unfortunately we would miss him claiming the biggest prize the sport has to offer, Brazil in 2015 the only 1:8 Onroad World Championship we have missed since going online in 2006.  Thankfully Simon, being the super nice guy he is, hasn’t held that against us and just before he caught his long flight to Chile we had a quick chat to get his thoughts on where he feels he is at as he attempts to become only the 3rd driver to ever win IFMAR’s original WC category more than once.  If he can pull off that feat he would also be the first non Italian to ever do so.  While legend of the category Lamberto Collari won’t be in Santiago for a chance at a 10th World title, and defending Champion Dario Balestri’s chances of a hat trick are on hold as he also wont be there, Simon did address the big talking point around this year’s 24th running of the Worlds – the absence of the entire Infinity team.  ‘I am disappointed that the Infinity drivers are not coming, it is a real shame for Kenji that none of them are coming, but no Infinity does not affect anything from my side in how we approach this race.  In the end there are still very good drivers there and you need to beat them and to beat them you need to work properly before the race in your preparations and then work hard when you get to Chile.  I have a really good focus on the race so from this side it does not change anything if Infinity are there or not.’

Now 33-years old, on where he expects his main competition to come from, without hesitation he replied, ‘Toni (Gruber), Shoki (Takahata) and (Andrea) Catanzani, Catanzani is fast and someone to really watch.  Maybe there will be some other surprises, we will see, but I think these are the guys.’  Asked the difference between the Simon of then (Brazil, 2015) and the Simon of now he replied, ‘There is not a big difference I would say.  A lot of things are the same, of course my focus outside of racing is a bit more into work.  Back at that point of my life I was studying and also had a great time with Silvio Hachler, who is a really good friend.  We studied together and could manage to do as much racing as we wanted to and it was an amazing time that time which also boosted us for good results and everything.  That is the main difference.’  He added. ‘On the other hand my father is still there racing with me and supporting me a lot.  Alex (Kempe) was also there in Brazil as support for Shepherd and now he is directly helping my father so we are looking forward to defend the title of South America.’  While the same dream team that helped him secure the TQ honours at the last World Championship in Japan 2-year-old, and this year’s European Championships, bSimon said it’s not quite the ultimate dream team, his brother having partnered his dad in executing the many pit stops en-route to becoming the World No.1 in Brazil.

Asked if 1:8 Onroad and its high revving little 3.5cc engines have notably evolved since the last Worlds, the class having had almost 50 years to perfect the concept, he said, ‘I think the engines made a big step again the last two years.  The cars have developed a bit also.  I see the difference with my new Mugen but also the other manufacturers have worked to get more from their cars so it is for sure a bit faster.’  On engine and in particular his own program with Ielasi Tuned, owner Daniele Ielasi a rival in Brazil but now one Simon’s key sponsors along with Energy Fuel, who supplied the control fuel for both the 1:8 GT and now the 1:8 Onroad Worlds, he said, ‘reliability is now on a really really good level compared to what we had over the past 10-years in our sport.’  He added this is the result of ‘development but also hard work from Daniele.’

Showing that their is no doubts over his outright speed in terms of being one of the fastest drivers on the planet taking the TQ in Japan on Infinity’s home ground only for a wing issue and engine tuning to thwart his effort in the final, Simon said, ‘this year at the Euros I could manage to TQ against all the Infinity guys and everyone so the speed is there yes, for us it is important to have a clean final.  That is the main focus and it’s been the focus for the last weeks and months in preparation to have more consistency there.  Even though in the last ENS it was not the perfect final race practice but things that happen you learn from them and they are over’.  Suffering a flameout in the last fuel stop at the ENS finale, he explained this was the result of a ‘quick & messy pit stop and lets say a lot of fuel came out and the engine flame out was due to that.’

On going to Chile armed with the new Mugen Seriki MRX7, it three years to the month since he made the switch from then German brand Shepherd after a long stint to the Japanese manufacturer, Simon gave the upbeat reply, ‘Actually it was a great season for the new car.  I could use it since ENS Ettlingen so I have a lot of experience. Durability and everything is as Mugen always was.  I think we could make another step forward with the car in the last month before that I couldn’t spend too much time on the track practicing due to other reasons. We will also get so much practice in Chile I think we will improve the car even further.  There is a lot to discover still.’

Having not yet sampled the track (at the time of our chat), asked his thoughts from what he has seen he replied, ‘It looks like Fontana (2018 WC host track).  I think the grip level will be more suitable for me than it was in Fontana because that was super high grip.  The layout in Chile looks good, and fast, so I think it will make for a proper World Championship.’  On that note we can’t wait to follow how it all unfolds at the impressive CACH facility.

Red RC’s coverage from Chile, which is presented by Capricorn, Radbody, T-Works, and IFMAR, will start on Tuesday (Dec 2nd) with four rounds of seeding practice and continue through to Saturday’s title deciding 1-hour Main,.


November 19, 2025

2025 SIGP Offroad Chassis Focus Index

China’s top annual international offroad race, the 2025 Sunpadow International Grand Prix (SIGP) once again earned itself a reputation of being ‘challenging’, the 3 Circles track one where suspension set-up is critical.  Only the second edition of the race since its return to the former 1:10 Offroad World Championship venue following a 4-year break, World Champions Bruno Coelho and David Ronnefalk returned knowing what to expect.  For newcomers like Kouki Kato, who would go on to take the nitro win, Pekko Iivonen, and young Korean talent Jung Hyunkyu, the track would be a completely new experience that would test their set-up skills on a new level.  Ronnefalk summed up the SIGP track very well when he said, ‘You’re not justing battling the other guy, I feel like more here you are battling the track out there so that’s offroad.  It’s not many times you race on a track like this anymore so it’s good to feel what it used to be like in the old days I guess.’  With shocks the big focus of drivers, Belgian shock components specialist brand TRC busy assisting many drivers with getting their buggies dialled in, getting our hands on buggies for our Chassis Focus proved a little more challenging than normal as drivers switched shocks between Nitro and eBuggy.  In the end we managed to feature 10 buggies from 6 drivers and 4 different manufacturers and we have compiled them in our latest Chassis Focus Index.

Nitro Buggy

Kouki Kato – Infinity (Winner/Q2)
David Ronnefalk – Xray (Top Qualifier/P2)
Bruno Coelho – Infinity (Q3/P3)
Pekko Iivonen – Mayako (Q4/P4)
Jung HyunkyuTeam Associated (Q5/P5)
Adrian Wicaksono  – Team Associated (Q8/P8)


Electric Buggy

Bruno Coelho – Infinity (Top Qualifier/Winner)
David Ronnefalk – Xray (Q2/P2)
Kouki Kato – Infinity (Q3/P3)
Pekko Iivonen – Mayako (Q4/P4)


November 9, 2025

Kato takes thrilling last lap SIGP victory in China

Infinity’s Kouki Kato has just taken one of the most exciting wins of his career, the Japanese driver winning the Sunpadow International Grand Prix after a thrilling last lap duel with Top Qualifier & majority race leader David Ronnefalk following 45-minutes of racing around the very challenging 3 Circles track in Xiamen.  With Chinese host track of the 2017 1:10 Offroad World Championships famed for its challenging bumpy conditions, it looked like Ronnefalk had taken control of the race with the main battle being for second place between Kato and his team-mate Bruno Coelho.  However a track that even the world’s best respect as being one of the most challenge there is, it didn’t take much for Ronnefalk’s lead to be eroded.  Passed by Kato on lap 56 of 80, the 19-year-old with hold the former World Champion at bay for 9-laps until a mistake with 7-minutes remaining, the local crowd invested in the racing and providing exciting audio as the leading drivers fell foul of track conditions.  Back in front and with the clock ticking down, Ronnefalk would again get tripped up by the track on the penultimate lap.  Coming of the main straight side by side to start the final lap, just as the computer signalled the finish of the 45-minutes, the pair took the jump on to the back straight and touched in the air both buggies tumbling but Kato having the better luck landing on his wheels.  While Ronnefalk tried to get back in touch over the remainder of the 34-seconds lap it wasn’t to happen and Kato took the win, the crowd appreciative of the thrilling finish.  Behind, by over 8-seconds, it was once again Coelho, winner of the eBuggy finals, who completed the nitro podium while Pekko Iivonen and Jung Hyunkyu were best of the rest in fourth & fifth.

Picking up over $2,800 for his win, which is put up event organiser Sunpadow batteries, giving his reaction to the race, Kato said it was ‘Very exciting, the last 2-laps everything changing.  We had a good weekend because Bruno win EP and I get Nitro, so a wonderful weekend.’  Running through his race, the 19-year-old said, ‘the car felt the best of the weekend in the final so they gave me the best car for the race.  Also, I did have some mistakes, but I also have good pace so I just kept trying for the win.’  On his fuel stops, the Japanese National Champion phrased his father and team-mate Coelho’s mechanic Ricardo Monteiro for their role in his win saying ‘they did a very nice job’.  Asked the significance of today’s win, him winning the final Philippine Masters Race to be run at the famed Circulo Verde track earlier this year, he replied, ‘here is probably one of my best ever races.’

Asked for a run down on what from a spectators point of view was a very exciting race finish, Ronnefalk replied, ‘I wish I had of been on the other side of that finish of course but it was Kouki’s day, he had more luck when he needed to there towards the end.’  He continued, ‘It felt like he crashed a couple of times and landed on his wheels and every time I had a roll out there I was on the roof so that’s what you need to win the races and the luck wasn’t on my side in the last 5-minutes.’  His second time attending the SIGP Offroad race, he added, ‘this is not a track you can step down in terms of driving because you are going to miss your marks out there and lose a lot of time.  You have to push, I tried, but I had a tap there on the second to last lap on the pipe, saved it, he got by, and on the last lap he went a little wide on the difficult jump section coming on to the back straight.  I dived on the inside and we went side by side over the first jump and we both tumbled.  I ended up on the rough and he was the wheels, that’s it not much I could do.’  One the gap he had established in the middle of the race he said, ‘Everything was working very well but I had two rolls two laps in a row after building up like a 10-second cushion and both of those times I was on the rough so I needed a marshal and brought them back into the game.  It is frustrating when you lead like 95% of the final and then you don’t come out on top but it was a good race and it’s intense when you have that close of a battle.  You’re not justing battling the other guy, I feel like more here you are battling the track out there so that’s offroad.  It’s not many times you race on a track like this anymore so it’s good to feel what it used to be like in the old days I guess.’

Summing up his race as ‘tough’ Coelho explained, ‘I had some very good momentum in the final and some bad.  I felt like sometimes the car was really good and on rails but then I would grab some hole or something and I’d flip and then it was difficult to get back to the pace.  It was very difficult to keep that momentum during the 45-minutes and I think that is what cost me the fight for the win because I can’t say I would have been in front of everybody but I am sure if I didn’t make the 10 or 12 mistakes I made in the final I would have been with them in the front.  I was still not far away from them 5-6 seconds from them.’  With himself and Kato running together for much of the race, on this he said, ‘I would make a mistake and was able to catch him, and then another mistake and able to catch him all the time like this, until I make 2 or 3 mistakes in a row that pushed me back a lot.  My last 15-minutes were very good but not enough to catch back up.’  Also finishing third last year behind Italian duo Davide Ongaro (winner) and Top Qualifier Mattia Polito, asked how this year’s track conditions in the final compare, the reigning Touring Car World Champion replied, ‘It was probably a little bit easier to this year because last year was super slippery.  It was even more difficult to jump more jumps and this year you were able to jump so I would say a little bit easier than last year but still challenging.’  He added, ‘This is a very old school track so it’s the kind of track where the tyre doesn’t really make a huge difference but everyone was actually on the same tyres so it looks like a controlled tyre which is very good because that is were comes the pace.  The track is very rough and you need to be very calm but at the same time you want to capitalise and move forward but sometimes you pay for that.  I like it a lot and it is really challenging and always very difficult.’

Asked about his race to fourth, SIGP first timer Iivonen said, ‘It started quite bad, I made a couple of stupid mistakes.  After that I couldn’t really catch the guys and made some other other mistakes and then I stated to hear that my gears were cracking so I just wanted to save it til the end.  At least that paid out’ – the Finn collecting 3,000RMB in prize money for his efforts.  Summing up his first experience of the SIGP, the 19-year-old said, ‘it’s a tough track so I think I did quite good overall.  My pace was there but I had a couple to many mistakes and maybe the cars were slightly too hard to drive.’   Asked if it was a track he would like to take on again, he said, ‘I think I would be happy to come back here for sure.  I would say like David (Ronnefalk) this is old school kind of racing.’

View our event image gallery here.


November 9, 2025

Chassis Focus – David Ronnefalk (Xray)

Chassis – Xray XB8’25
Engine – FX K303
Fuel
Tires – Hotrace
Radio – Sanwa M17S
Servos – Hitec HSB9381
Body – Xray

Image Gallery


November 9, 2025

Chassis Focus – Pekko Iivonen (Mayako)

Chassis – Mayako MX8-LCG 2.0
Engine – O.S. Speed B2105
Fuel – Nitrolux
Tires – Hotrace
Radio – Sanwa M17
Servos – Savox SB3290SG (steering & throttle)
Body – Mayako

Body – Pekko’s buggy is fitted with Mayako’s new LCG 2.0 parts and Floating Steering Mount.  Thanks to his ‘Green’ Glow Stick RC Antenna his buggy really stood out on the track especially when running in the evening.

Image Gallery