i have the lrp z.28r engine .. thats the same as the SH.28 .. and i would say its deffo got lots more power that my picco p3 .. i was only running in my lrp and not even tuned it and it was flipping my savage .. ...
(sliding clutch)
Mark
i would use after run oil or some other type and i clean my airfilter all the time befor and after a good bash/race .. all so i use some byron oil boost too this keeps the engine really cool and all that ..
Mark
my brake in on the engine was 6 tanks of tickover with that oil and then 3...