Hi guys,

what can be done to a Collari Cordoba engine to get as many revs as possible for extremely long straights (next 1/8 worlds track Lostallo Switzerland or Melzo Italy)? The engine runs very well on medium sized tracks with 0,6mm head gap (0,7mm shims) and a 7 plug.
I saw on the set-up sheets of some pros that they add 0,15mm of head shims for those circuits. Any thoughts?