I still think that there has to be a bug at the steering ratio. Are you sure that the volvo hondbook value 20.3deg is the total radius? 40.6 would be something that fits perfectly to passenger cars of that era, and volvo usually has pretty ridiculous steering angles, that's why it is loads of fun at winter. And compared to that video.. I have to turn way more to turn the car, even while going flat-out @ 900deg. I changed the ratio to 40.6 and it felt better and was still slower than racecars. The mazda had 15.2:1 ratio and 2.7 turns lock to lock. And I've never had a car that had as little lock.