RE: Behold the new Radical SR3 XXR
RE: Behold the new Radical SR3 XXR
Wednesday 21st December 2022

Behold the new Radical SR3 XXR

The SR3 is Radical's best-selling car; prepare to want one even more now


In all probability, those that ever raced a Radical will likely have raced an SR3. Of the 2,800 cars made by the company since 1997, more than 1,500 have been SR3s, and the majority of the 12 Radical Cup championships run across the globe use the model as well. Having listened to feedback from its racers, Radical now has this ready for 2023: the SR3 XXR.

Building on the SR3 XX of 2020, the R promises improved performance, usability and durability while ‘retaining the essence of what makes the SR3 the most successful prototype-style sports racing car in the world.’ So while it still uses a high-revving 1.5-litre four-cylinder Suzuki engine, the SR3 XXR can run on biofuel - the first Radical to have that capability.

Power is 235hp and it revs to 10,000rpm - James Pinkerton, Radical Motorsport’s Head of R&D, describes it as “undoubtedly the star of the show” - with lighter conrods, crank pins and a reworked cylinder head to improve flow rate and consistency. The sequential gearbox has been recalibrated as well, and a new cooling system will get the XXR up to race temp quicker. Radical says that additional power and torque have been achieved without compromising durability.

Elsewhere, the aero has been tweaked with a new central ‘shark fin’, there are new brakes from AP Racing (boasting better pedal feel and lower unspring mass), and a pit lane speed limiter is also now standard fit (apparently, too many racers were getting penalties for speeding during stops, which this will prevent). New DRLs and wheels mark the SR3 XXR out, as do the available carbon splitter and diffuser.

Pinkerton added: “The SR3’s handling is renowned as a masterpiece so for [SR3] XXR we took the approach of evolutionary improvements across multiple areas. We looked at customer feedback as well as a list of items we’d personally like as racers. We then set about scrutinising every system on the vehicle to see where improvements could be made, whilst staying true to the SR3 formula.”

It seems a fitting way to round out 2022 for Radical, its 25th anniversary year being one of ‘unprecedented growth’, with more cars bought and sold than at any other time in its history. Those who want to buy an SR3 XXR can place an order with their dealer now; production is due to start in February, with deliveries before that month is out.


 

Author
Discussion

Hugh Jarse

Original Poster:

3,574 posts

235 months

Tuesday 20th December 2022
quotequote all
I really need to be commuting in this instead of a 7 seater tank that accelerates like a wounded bison.

Twinair

1,043 posts

172 months

Tuesday 20th December 2022
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Can you get number plates for that?

Waitrose run would never be the same again! (For the missing avocado - should be space enough for that 1 item?!)

Not my thing - but love the intent of it for those whose thing it is :-))

Krikkit

27,938 posts

211 months

Tuesday 20th December 2022
quotequote all
Twinair said:
Can you get number plates for that?

Waitrose run would never be the same again! (For the missing avocado - should be space enough for that 1 item?!)

Not my thing - but love the intent of it for those whose thing it is :-))
No, but some of them can be made road legal.

You wouldn't really want to use one on a busy road mind, the bike engine, sequential box and incredibly stiff suspension mean it'll be a painful experience.

MCBrowncoat

1,780 posts

176 months

Tuesday 20th December 2022
quotequote all
Why would a halo be preferable to a screen in this case?

timmytime82

4 posts

60 months

Tuesday 20th December 2022
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I used to be Radical Precision Engineering’s production manager for a while and although I’m biased, this thing is on another level! Awesome piece of kit and actually I know for a fact it wouldn’t take a lot to get some number plates on it and take the kids to school in it. One at a time obviously.

Slowboathome

4,461 posts

74 months

Tuesday 20th December 2022
quotequote all
'The R promises improved performance, usability and durability'

What do they mean by this? Does it mean that it will be easy to drive fast on a track? Presumably they're not suggesting it's handy for tip runs.

BertBert

21,299 posts

241 months

Tuesday 20th December 2022
quotequote all
"Power is 235hp and it revs to 10,000rpm - James Pinkerton, Radical Motorsport’s Head of R&D, describes it as “undoubtedly the star of the show” - with lighter conrods, crank pins and a reworked cylinder head to improve flow rate and consistency. The sequential gearbox has been recalibrated as well, and a new cooling system will get the XXR up to race temp quicker. Radical says that additional power and torque have been achieved without compromising durability."

Back in the day when I did this (SR3RS), the rev limit was higher and the power quoted at 260bhp. I know there have been many iterations since then, so it's interesting to see where they are at now.

I wonder what the refresh interval is now? Is it 40 hours? Mind you back in the day, I never got to the 30 hours as the gearbox always seemed to give problems at 25-28 hours. Those were the days!

Bert

Dazed & Confused

209 posts

234 months

Tuesday 20th December 2022
quotequote all
Slowboathome said:
'The R promises improved performance, usability and durability'

What do they mean by this? Does it mean that it will be easy to drive fast on a track? Presumably they're not suggesting it's handy for tip runs.
Lane-keeping assist.

On track you can just close your eyes and floor it.

asci.white

561 posts

103 months

Tuesday 20th December 2022
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MCBrowncoat said:
Why would a halo be preferable to a screen in this case?
Likely due to regulations for specific racing leagues.

130R

7,113 posts

236 months

Tuesday 20th December 2022
quotequote all
MCBrowncoat said:
Why would a halo be preferable to a screen in this case?
Weight/visibility. Also the airbox is pretty low so that might be an issue

British Beef

2,572 posts

195 months

Tuesday 20th December 2022
quotequote all
130R said:
MCBrowncoat said:
Why would a halo be preferable to a screen in this case?
Weight/visibility. Also the airbox is pretty low so that might be an issue
But that Halo looks like its been put together by a scafolder.

I agree with a screen being better option for looks anyway.

MountainsofSussex

448 posts

216 months

Tuesday 20th December 2022
quotequote all
British Beef said:
But that Halo looks like its been put together by a scafolder.

I agree with a screen being better option for looks anyway.
Couple of reasons, I reckon - screen needs wipers and some sort of demist. Probably much easier to engineer some standard tubing than a completely custom piece of plexiglass, which would be way larger than they use in indycar for example. And might also necessitate cooling for the hotter countries where it's sold. However, halos are never pretty, and the load path into the diagonal roll hoop support looks horrible. I assume someone has done their maths...

JRzwevegem

68 posts

184 months

Tuesday 20th December 2022
quotequote all
Prices??

Midgster

634 posts

264 months

Tuesday 20th December 2022
quotequote all
MountainsofSussex said:
British Beef said:
But that Halo looks like its been put together by a scafolder.

I agree with a screen being better option for looks anyway.
Couple of reasons, I reckon - screen needs wipers and some sort of demist. Probably much easier to engineer some standard tubing than a completely custom piece of plexiglass, which would be way larger than they use in indycar for example. And might also necessitate cooling for the hotter countries where it's sold. However, halos are never pretty, and the load path into the diagonal roll hoop support looks horrible. I assume someone has done their maths...
My opinion is it's a bit of cost saving while looking a bit cutting edge at the same time......F1 cars have halos, lets give it a halo!!

Terminator X

20,849 posts

234 months

Tuesday 20th December 2022
quotequote all
Awesome!

TX.

BertBert

21,299 posts

241 months

Tuesday 20th December 2022
quotequote all
Midgster said:
MountainsofSussex said:
British Beef said:
But that Halo looks like its been put together by a scafolder.

I agree with a screen being better option for looks anyway.
Couple of reasons, I reckon - screen needs wipers and some sort of demist. Probably much easier to engineer some standard tubing than a completely custom piece of plexiglass, which would be way larger than they use in indycar for example. And might also necessitate cooling for the hotter countries where it's sold. However, halos are never pretty, and the load path into the diagonal roll hoop support looks horrible. I assume someone has done their maths...
My opinion is it's a bit of cost saving while looking a bit cutting edge at the same time......F1 cars have halos, lets give it a halo!!
Confused by the discussion. The SR3 has never had a screen, it's not a "screen" car. The halo is simply extra safety. Poss a bit over the top, but that's progress for you

ManyMotors

1,108 posts

128 months

Tuesday 20th December 2022
quotequote all
I've seen various Radicals perform on small tracks and they look like fun. But you need some track storage or a trailer rig. I did some ciphering once and determined that the cost of a Radical will be close to the cost of belonging to a fine golf club.

Krikkit

27,938 posts

211 months

Tuesday 20th December 2022
quotequote all
Midgster said:
MountainsofSussex said:
British Beef said:
But that Halo looks like its been put together by a scafolder.

I agree with a screen being better option for looks anyway.
Couple of reasons, I reckon - screen needs wipers and some sort of demist. Probably much easier to engineer some standard tubing than a completely custom piece of plexiglass, which would be way larger than they use in indycar for example. And might also necessitate cooling for the hotter countries where it's sold. However, halos are never pretty, and the load path into the diagonal roll hoop support looks horrible. I assume someone has done their maths...
My opinion is it's a bit of cost saving while looking a bit cutting edge at the same time......F1 cars have halos, lets give it a halo!!
It's a general push among low cockpit racecars to protect the drivers from front impacts with large objects. Most single-seaters have them, and if you see a radical in the flesh surely you can appreciate why it might be a good idea? Doubly so if you're running your SR3 on track with a saloon.

As for how it looks, obviously spoilt with F1's unobtainium bits of kit.

Bencolem

1,191 posts

269 months

Tuesday 20th December 2022
quotequote all
How much does it cost?

anonymous-user

84 months

Tuesday 20th December 2022
quotequote all
ManyMotors said:
I've seen various Radicals perform on small tracks and they look like fun. But you need some track storage or a trailer rig. I did some ciphering once and determined that the cost of a Radical will be close to the cost of belonging to a fine golf club.
More like owning the fine golf club.....

i do love this car and that engine in a mazda mx5 would be interesting .....if it would fit smile