I never raced 1/12th, but started racing with an off road car in the early to mid 90s and never used anything more than a mabuchi or 27t 36degree motor for a long time.
When I did finally get a 13x3 I was instantly scared of the power
And to hear a quin motor spool up was crazy, so much rpm!
Not to mention the skill it would have taken to wind an arm of that description - and being relatively durable!
To see how these guys raced at that time was a great sight to see