the same brand engines that r good for 1.10 are the same for 1.8th
i.e novarossi p5, 421b, 21sb
crono rs3, rs5, rs7, rs8
rb s5, s7II, Ws7II, c5
JP B5N, M3k
OS Vspec
Sirio Evo 2, bx
Collari B7 , B3
any of the above are great engines..and are more than enough for most cclub racers....depends on your budget.... i just got myself today a sts d21b for weekend practice... i'll see how they go.