Spring rate advice Options

[BlueRidge914]

I’d be grateful for some spring rate advice for my vintage race 914.
It’s a narrow body 2L six, 205/50 tires all around. Front torsion bars with adjustable sway bar. Rear is Bilstein Sports with adjustable spring perches, and a fixed sway bar.
My personal preference leans to a relatively softer spring all around.
Any recommendations for both torsion bar size and rear spring rate?
Thanks!
Gavin
VARAC #58

[Thorshammer]

Ok,

The next step is a leap in faith, also in money. I would consider this two ways. General improvement, or a full assault.

General improvement: reduce unsprung mass, reduce friction in all joints, properly strengthen areas.

-Tangerine racing builds some outer suspension mounts, that do not flex. The stock units flex a great deal
-again TR for a set of proper trailing arms. His research was proper, and as we discussed the issues, and my experience with motorcycle swing arms, and how we used to pass tubing through the arms, and weld, he built fixtures, and really came up with proper solutions that have been tested and confirmed, they are right.
-Find, buy, build, copy the Shine Racing services Nadella needle bearings. When Dick Shine (his real name) built these, it addressed a multitude of issues, strength, friction
-not sure what your rear bar is rotating in, but the links need to be heims, and the main bar must rotate without friction… but we never ran them… ever

Front:

-Get rid of the torsion bars. And go to coils
-the front suspension a-arms also need needle bearings… shine again, if you can find them… otherwise, the ERP stuff, is nice, as is Tarrets (Ira has done a great job with his company)
-front sway bar: key piece of kit: I like the .100 wall speedway bar mounted in needle bearings. Some key fab here, pay attention to the angles.

Now.. if price is not a concern:

Tractive dampers… although their customer care sucks, their product is extremely well performing.

Raise the rear suspension pickup points 3.0 inches… TR has a kit
Ask if TR will reclock a set of trailing arms to alter the IC…. Some blind trust in what he did 20+ years ago… it’s right, it works… you will find the same concept in the Finch/Hotchkiss/Kirby 914.

300 lbs fronts, 300 lbs rears…

Slicks…