"1800SSS" historic racing project

[MK510]

Gear ratios are free if provably used at period, i have used 3.7, 3.9 and 4.375 diffs depending of racetrack, tires are 235/45R13
I have 4-speed gearbox because only FIA homologated 5-speed is roadster box which is hard to find here.
Not sure if steering box brace is allowed, is there any documents that it's been used in racing 510 before 1972?

[bertvorgon]

Likely not, I like to think we pioneered that brace in 1983/84, when we tested the "twist" in the engine bay and then the steering box rail, showing that the twist in the engine bay was negligible, but, the frame twist with sticky tires was measurable and really helped with steering precision. Same with the Delrin bushing in the idler arm.

I'm sure someone else may chime in, I did not start racing till 1975, but no 510's that I remember ever had a brace. Unfortunately my pictures of the BRE car and Bob Steven's car, do not show the steering box area. Have to look in the How to Modify the 510 to see if any pics show up. My copy is buried here somewhere, I will take a look.

I see you have a handle on the gearing issue!

[MK510]

Season 2022 results
Race1: 1st in class/4th overall
Race2: 1st in class/3rd overall
Race3: 1st in class/3rd overall
Race4: 1st in class/2nd overall
Race5: 1st in class/6th overall
Race6: 1st in class/7th overall
Race7: 1st in class/5th overall
Race8: 2nd in class/12th overall
Championship winner in class G/B(cars between years 1966-1971,1600-2500ccm)

Changed different camshaft for this season, gained bit more power to top end but lost some low end torque.
Laptimes improved in some circuits so the car is little bit faster now.

Picture is from first corner of the seasons last race, got a great start from 5th on the grid, leading half a lap but then gearbox got stuck in 4th gear and dropped then to 12th place at finish.

HKR22 (2).jpg (91.67 KiB) Viewed 502 times

[BEO 510]

Very good results, any racing this year? In a calendar i see a historic race in mid August and one first in september.
What gearbox are you running, the standard 510 F4W63 ?
You changed the steering box, to from what?
Building your engine yourself?
Have you ever raced in jokkis class? And with a Datsun?

[MK510]

Very good results, any racing this year? In a calendar i see a historic race in mid August and one first in september.
What gearbox are you running, the standard 510 F4W63 ?
You changed the steering box, to from what?
Building your engine yourself?
Have you ever raced in jokkis class? And with a Datsun?

Four starts already this year, two weekends left, results so far:
Race1:1st in class/4th overall
Race2:1st in class/4th overall
Race3:1st in class/4th overall
Race4:1st in class/3rd overall
Gearbox is F4W63 with closer ratios.
Steering box is from 710, just for safety reason, it has joint on steering column.
Yes i build my engines.
Raced in jokkis class 30 years, always with Datsun, have had 3xB110, 1xKB110, 2xB210, 2xB310, 2x510 and 1xC130.

[BEO 510]

Someone claimed the Finnish 510 only came with the "solid" and not the collapsible steering column?
In Norway the collabsible came on the 71 mod. The 72 in Sweden had it, before that i don't know.
I once test fitted a 610 steering box on a 510, a little dent in the inner fender was needed for the bigger housing 610 box.
A bigger nut and splines for the pitman arm on the 610 vs the 510.
I only did four seasons with the same 510 in the Norwegian version of jokkis, and it is 30 years ago. L-18 and 100% 510 car.
No 510's in action anymore here now. I see very few in Finland, and it looks like they go the Volvo engine route and solid rear axle.
Some years ago i went to Kittisvara for the big race there, only one 510 (Volvo engine, solid rear axle) out of many hundred cars.

[MK510]

Yes i think all 510's here came with solid steering column, never seen collapsible one.
All my jokkis Datsuns had L-series engines, at the moment i have 510/L18 1897cc 170hp and B310/L20B 2045cc 187hp, almost all other racers had Volvo engines.

[BEO 510]

Cool, so you still racing jokkis? Do you have pictures and more details about your cars? I have for years watching jokkis youtube videos regulary to see if i can spot a 510, very few times that happend. That asfalttikunkku race is cool, the wheelie Fiat's 133 is one of a kind. When i went to Kittisvara or Pello (2015 i think it was) to watch that big race i expected to find three or so 510's. But only one was there, and under a tarp? Never find the ovner. One B110 with Volvo engine was there, he pulled the head with a broken head gasket. Between chamber 2 & 3 a groove with metal missing appeared. On the ground in the gravel this guy welded this groove with a stick, angled grinded and hand filed the weld, slammed it together and raced in next round. Just one example of many what makes this game what it is about. I talked to one person that tried to explained the rules with this 30 cm rearward movement of the firewall and engine, and/or the movement of the front and rear axles, but i am not sure how it was. Perhaps you can tell a little about the technical rules? They are some different i can see, compared to the Swedish and Norwegian rules that are more or less the same. What class is rokkiralli?

[MK510]

Historic race cup season 2023 ended
Race5:1st in class/4th overall
Race6:1st in class/3rd overall
Race7:1st in class/3rd overall
Race8:1st in class/1st overall
Championship winner in class again and finally get my first overall victory from the last race

[bertvorgon]

CONGRATULATIONS........Job well done!

Nice picture too!

[WxMan]

Nice job. That has to feel good!

[iceman510]

Excellent work. Congratulations.

[BEO 510]

Impressive! 7 of 8 first places last year, 8 of 8 this year.

[MK510]

Find good pictures of saving right side tyres

[MK510]

Cool, so you still racing jokkis? Do you have pictures and more details about your cars?
Perhaps you can tell a little about the technical rules? They are some different i can see, compared to the Swedish and Norwegian rules that are more or less the same. What class is rokkiralli?

Yes i am still racing jokkis, but haven't race this year yet, maybe i will race some smaller local event with 510?
My jokkis 510 has stock axles and no firewall movement, stock 4-speed gearbox and 4.875 welded rear diff, B310 has Bluebird 910 front suspension and steering rack, H190 rear axle 4.625 welded diff with 4-links.
I think Finland technical rules are more free than Sweden/Norway folkrace, rokkiralli is quite similar but different organisation races.
My B310 from icerace 2018

510 from Asfalttikunkku race 2022




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