^^^Thanks for that info!
But I was
not questioning whether or not they use coil overs setups vs. struts/dampers/springs, but whether or not the complete
rest of their suspensions were
factory stock or not.
Not much around where I grew up, but Mark Donohue was raised the next town over from mine.
I am also currently not living too far from what used to be Holbert Porsche, the shop/dealer (one of the first in the country) out of which the late Al Holbert ran his successful IMSA 911/952/962 campaigns.
Oh definitely they went aftermarket shocks and springs lol. Stock 510's rode at off road vehicle status compared to track setups. I will never forgot driving my friends imported Bluebird (510) 1800 SSS coupe ten 10 years ago and it was low mileage stock. Worth 10k at the time. I called up a fellow 510 cohort from the glory days and was like WTF did we see in these tin cans. Hahaha thing is the minute you lowered them it was instant go kart. Oh and boy did they slide nice. That's were I learned to drift every time it rained we would go out and get sideways. Lol
I remember watching them go through corners on the track and they were just flat on the ground while the BMW 2002 yawed slightly and the Alfa GTV raised a wheel ( perhaps in anger? )
I used tp want get a personalized plate IEATBMW. Hahaha Who would have known years later I would own a BMW or two.
I digress though. I do know it was a work in progress learning. Like the fact that using a 69 front crossmember had higher pickup points for the control arms thereby helping the roll center when lowering and elminating bump steer.
This was pre urethane days . Not exactly sure whe Delrin bushings were introduced but by 76-77 it was what everyone was doing to their car for the rear semi trailing Arms. It was also down for the A arms in the Z's. They also slotted the rear crossmembers for camber adjustment. Oh and they did have camber plates for the struts prior to coilovers.
The early cars though pretty much were aftermarket springs and struts. Koni's were used, Bilsteins were used. Of course Datsun comp had stuff from Japan but also American manufactured stuff from the likes of BRE, Electramotive, Far Performance, Later Bob Sharpe racing etc.. . Nismo did not exist at that point.
Oh and yes they did mod the engines , cams, port work, pistons, they had too. The Alfa's had power the BMW's had brakes but the 510's had stiff chassis and cornered flattest. So they had to work on the engines to keep them competitive on the straights.
Nissan racing in Japan was pure factory. My paint guy used to race Formula cars in Japan and remembers the Skyline GC10 GTR's and Fairlady 432Z's( s20 twin cam triple solexed 5,speed 240z's with G noses and ZG fender flares) said they use to toss S20 engines in piles next to the pits at the track. They had no idea those were going to become super rare engines worth over 10k.
Wow I have completely derailed this thread with Datsun racing history . Lol
Shall we return to Swift Springs? Oh ya they are a Japanese company! Hey I tied it in. Lol Though I have to say they have put a lot of research into their spring design and unlike most Japanese shock companies understand that their springs will be used on lots of different types,of surfaces.