my track toy has just said goodbye to it's latest M20B25 so it's time to make my decision about which way to jump.
I don't have the time/skill to do it myself and also have a budget so can't go for a mental upgrade.
As mentioned it's a track toy so I'd like a bit more power but would like to introduce a little more reliability as it gets treated hard!
Options I'm aware of:-
just stick another M20B25 in (cheapest/easiest option but I get no extra power)
M52 (M50 adds weight which goes against the principle of my track car)either B25 or B28. The 28 obviously has more power but someone has said the 25 revs better?
All opinions, pros & cons for possible options welcome




