Yellow Bullet 2: The Time-Attacking Suzuki Jimny

Normally I like to save my favorite spotlight from an event for last, but this time around I just can’t bring myself to do it; a JB23W Suzuki Jimny kei car weighing 750kg and powered by an SR20DET needs to be shared straight away.

This isn’t a brand new build, and many of you will likely remember Kinokuni Enterprise’s Yellow Bullet Jimney in its original rear-wheel drive drift guise. At last weekend’s Rev Speed Hyper Meeting however, it made its first appearance as a time attack machine. Yes, you read that right.

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If you think that sounds crazy you’d be correct, but perhaps not as crazy as the Suzuki looked sitting in the paddock. Normally the now renamed Yellow Bullet 2 runs a wide-body kit, but with cornering g-forces being a lot higher than the custom FRP was designed for, the Kinokuni team decided it would be safer to remove it entirely and run the car without it. This also meant that the aerodynamics gained by the kit would be gone, which wouldn’t be doing the Jimny any favors given its brick-like dimensions.

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Nevertheless, the team was in high spirits and excited to see what the car could achieve around the hallowed turns and short straights of Tsukuba Circuit. While the Suzuki was being warmed up in the paddock, I swooped in for a closer look.

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For a vehicle to be eligible for the kei car category here in Japan, and thereby able to receive tax and insurance benefits, manufacturers must abide by strict regulations put in place by the Japanese government, one of which being a maximum engine capacity of 660cc. As such, the Jimny originally came with Suzuki’s K6A, a 658cc three-cylinder engine good for an earth-shattering 64PS.

As you can though, that engine is long gone now, in its place the powertrain from a Nissan Silvia S15 with an SR20DET developing close to 400ps.

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The SR20 features a number of upgrades including Tomei forged pistons and engine processing, Naprec oversized valves and upgraded springs in the cylinder head, and a BorgWarner EFR 6758 turbocharger. The whole package is controlled by Haltech Elite 1500 engine management system and other modules from the Australian aftermarket ECU manufacturer.

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As you’d imagine, a huge amount of custom fabrication has gone into this build, and some of that is evident in the trunk area which is now home to a rear-mount radiator setup. You can also see the roll-cage that ties all the tube work to what’s left of the Jimny’s original structure, and the Fortune Auto 510 Series coilovers, which are used front and rear.

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Providing a lightweight wheel solution and pulling the whole visual look together are RAYS Volk Racing TE37Vs in a 17×10.5-inch fitment at both ends of the Suzuki.

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Without the wide-body kit attached, the massive (for a Jimny at any rate) 255/40R17 Zestino Gredge 07R tires bring new meaning to the word ‘poke.’

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With drifting being the original function of the Suzuki, the rear end features extra stopping power from a Stealth Performance setup connected to the hydraulic handbrake in the cockpit.

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And speaking of, the original interior remains mostly intact (at least in the front), with extra gauges and an Auto Meter Sport-Comp tachometer fitted into the Jimny’s original dash and center console.

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Yellow Bullet 2 was simply amazing to watch haul around Tsukuba, and with pro driver Sunako Tomohiko at the wheel, despite all its handicaps it still managed a respectable 1:06.431 lap time.

Of course, video makes everything better, so click play above to watch 13 minutes of onboard footage.

Hopefully we’ll see more of Kinokuni’s creation at future time attack events, but until then you can check out the build diary here.

Ron Celestine
Instagram: celestinephotography

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23 comments

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1

would be interesting to make a second run with same setup and the body kit installed to check how much can the aero be effective.
Anw it reminds me of NFS UGII where you could select an SUV slam it tune it and make some visual changes at the end go take it and race normal sporty cars.

Author2

It would be pretty interesting to see the difference. I believe they are making another body kit designed for circuit runs so we may see that happen in the near future.

3

Waiting for that moment

4

I love this thing so much, the engine sounds so solid too, always did since the first time I saw it getting tested drifting. It is very clear from the video there is still a tonne unused potential, the setup still seems a little drifting oriented, brakes too harsh, suspension a tad too hard perhaps, but I'm no expert. Would be super interesting to see the little beast after some fine tuning and most of all AERO AERO AERO to try and get all the power down and usable through corners!! Wicked.

Author5

No, for the most part your correct. It was still pretty much setup for drifting that day, and the Aero would have been a game changer for sure!

6

yea . he seems kind of slow out the corners. I wonder what his lap times would be if he got smaller wheels and shorter gears.

7

what Janice said I'm taken by surprise that some one can earn $8126 in 4 weeks on the
computer . go right here>>>>>>>>>>>http://www.biz40.com

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8

Not this shit again...

9
Only happy when it rains

Something really unique! Great job!

10

What is going on here: "As you can though, that engine is long gone now," As you can imagine?
and engine processing? i don't understand? an engine is not a computer. An engine comprising of: ? is that what you are trying to say?

11
Automotive obsession

Picking up an AMG Edition One! https://youtu.be/JFu5lUcXo_A

12

No one cares. Stop plugging your shitty youtube channel

13

Dinky roll cage. So much other good work and such an awful bar following the A pillar.

14

Epic stuff, looks like a machine built for pure fun.
Excellent!

15

Looks cool - is it 4wd or rwd??

16

Brilliant. I think I loved it more when it looked like this tho:

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17

Saw this thing in a couple of Noriyaro's video's. Cool as!

18

WHY a bolted cage. Why?

19

I thought the Jimny was classed as a Kei truck and therefore kept its 1.3 4cyl engine that it gets everywhere else?

20

Kei cars are up to 660cc. There's both 660cc and 1.3l models of the car in Japan.

21

It would be more interesting, if it still had the live axles. :D At least that's how I would imagine a built for the track Jimny.

But I kind of like it this way too.

22
Matthew Everingham

This is the coolest golden nugget we've uncovered in a while! Nice find Ron!

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