I wonder if the Atom 4 would outpace this on track

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simonrhart
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I wonder if the Atom 4 would outpace this on track

Post by simonrhart » Fri Nov 09, 2018 2:17 pm

I've always thought of a Radical and this one is quite a good deal https://www.pistonheads.com/classifieds ... eo/7903773

I am curious though whether the 4 would be quicker than this around the track - any UK track. What are your thoughts on this?

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Re: I wonder if the Atom 4 would outpace this on track

Post by phil4 » Fri Nov 09, 2018 2:23 pm

It'd depend on the track and driver.

That car has aero in abundance... give it a track with high speed turns and a driver with big b*lls and it'll be a lot quicker than an Atom 3.5R or 4.

But on a slower track, no it wouldn't.

That being said, remember the Ariel tag line "Serious Fun™", it's not exactly about absolute lap times. It's not set a new Nurburgring record. It's about having some proper fun.

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Re: I wonder if the Atom 4 would outpace this on track

Post by simonrhart » Fri Nov 09, 2018 2:33 pm

Snetterton - as it's my local. Fast track not particularly technical. Example of the RSX here at Snetterton 300: https://www.youtube.com/watch?v=9Ch8nH6BxsA

The kid in me sometimes does wonder whether I'd have more fun/joy in something like this or a Ultima Evo. This car comes with the sequential gearbox too.

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Re: I wonder if the Atom 4 would outpace this on track

Post by Preseh » Thu Nov 15, 2018 2:01 pm

As mentioned, aero is the key factor and the Radical will most probably walk all over the Atom on high speed tracks. It depends on your usage though - if you're using the Atom for normal track days then I reckon the Atom is spot on for the fun factor.

As for the Ultima, I heard that the older car's chassis wasn't good enough for the power they usually have but they might have fixed that in the Evo. I ended up going for a deposit on the Atom 4 because my mechanical knowledge isn't great and I know with the Ultima I'd probably spend a good amount of time on the hard shoulder :laugh:

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Re: I wonder if the Atom 4 would outpace this on track

Post by simonrhart » Fri Nov 16, 2018 11:07 am

All 3 are very good cars. It depends on cost of the 4 with the sequential box and all the other bits that are unknown at the moment. Having to tow the car to the track is a bit of a pain but that said I will end up doing this with the Atom anyway when going overseas i.e. Spa.

I decided against the Ultima for now just because I don't have the bandwidth to spend 500hrs building it.

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Re: I wonder if the Atom 4 would outpace this on track

Post by Spikey_head » Sat Nov 17, 2018 1:55 pm

When I last looked, the Radical wanted an engine rebuild every 80 hours

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Re: I wonder if the Atom 4 would outpace this on track

Post by simonrhart » Sat Nov 17, 2018 2:42 pm

The engine rebuild duration depends on a few things. The 1300 litre engine is recomended a rebuild at atleast 80hrs, this is the engine in the sr1 and available in the sr3 and requires much less maintenance. The 1500 found in the sr3 rsx and other cars needs a rebuild at around 40hrs.

If I get one it will be the 1500 for the sr3 just because of the power!

Recomendation from Radical is this rebuild time depends on how you look after it, i.e. let it warm up in the pits before going out on track, don't bounce off the red line too much, change oil and oil filter often and that 40hrs can become 80hrs. The factory has someone running at 96hrs presently. So if looked after correctly, the maintenance should not be a problem.

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Re: I wonder if the Atom 4 would outpace this on track

Post by phil4 » Sat Nov 17, 2018 5:32 pm

80 hours didn’t seem too bad. At 60mph that’s not far off 5000 miles, which while stingy compared to modern ecoboxes... ain’t bad for a performance motor.


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Re: I wonder if the Atom 4 would outpace this on track

Post by simonrhart » Sat Nov 17, 2018 8:01 pm

I didn't think it was too bad either. It's similar to a Ferrari service as well, cost wise is around £3-4k which is not cheap of course but a lot of track time can be had. A rebuild is not the same as a road engine service, you are more or less getting a new engine as many components are replaced.

The cool thing is, it can be raced too and it is track ready in stock form meaning you get; seq gearbox with paddles, adjustable suspension, lsd, front splitter, diffuser, rear wing, 4 pot 280mm floating brakes, fire extinguisher, brake bias adjuster, aim and dry sump.

One major down side is they don't seem to hold their value like an Atom does, in fact I don't think much else does out there apart from some Ferrari's and GT Porsche's, not even an Ultima. A stock new 1340 SR3 costs £78k inc VAT but you can get a 2017 1500 almost new SR3 with low hrs for around £55k. And the 1500 engine upgrade is an additional £6650 + VAT on the £78k.

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