I’ve got one of the few ‘85 Reynards still running the factory push-rod setup.
I know there’s a lot that goes into determining spring rates, and I know I probably don’t have all the info, but I’ll list what I have and hopefully someone can help with a ballpark idea.
I’m currently wearing out end plates and bottoming out at Mosport (CTMP) in turn 1 and turn 5 because the front end drops so much (Turn 1 no brakes, Turn 5 all the brakes!)
Ride height:
Front 75mm
Rear 85mm
40/60 front/rear
50.1/49.9 cross weight
229/224 front
346/344 rear
Hoosier Bias ply tires:
Front – 20.5 x 7.0 – 13 R60A - 43164
Rear – 22.0 x 8.0 – 13 R60A - 43285
Current spring rates (as written on the springs, not tested)
Front: 420
Rear: 550
Here’s the lean in 1 doing 175kmh
Would 50-100lbs make a big difference? Or is +200-250 going to be what it takes?
Thanks!