How to fly a Spit 1a correctly!?

[SEE]

In a word - 'altitude' - wether you are low level furball fan or prefer high alt DF's your Spit1a will always benefit from having that potential energy advantage. I set PP to around 2700 RPM and generally leave it that. In combat open the rad fully.

No point in trying to chase after a BF in the circumstances you describe - it will outpace and outclimb you. Watch the good Spit jockeys around Hawkinge - flying as if they are on some imaginary roller coaster - always trading altitide for speed and vice versa.