KeithB
Well Known Member
I posted this under the ?Superior Buy Back? thread and got no responses - I?m hoping it just got buried.
Lycoming offers a 390 with cold air induction - C3B6 model rated at 215 HP (available on the Cirrus SR20 for example). Vans does not offer this (it must be A3B6) and I suspect this is because the Lycoming cold air induction sump (like the Superior XP-400 sump) is lower and would interfere with the crossover exhaust (4 in 1) designed for the RV14. However, for my Superior XP400, I substituted a Vetterman trombone system (2x 2-in-1) which does not cross under the sump. Has anyone installed or investigated the C3B6 IO-390 (Thunderbolt, non-certified) engine for an RV-14? I realize I would face changes in cables (throttle and maybe mixture) but I?m more concerned with intake and exhaust pipe spacing and clearing the sump itself.
Lycoming offers a 390 with cold air induction - C3B6 model rated at 215 HP (available on the Cirrus SR20 for example). Vans does not offer this (it must be A3B6) and I suspect this is because the Lycoming cold air induction sump (like the Superior XP-400 sump) is lower and would interfere with the crossover exhaust (4 in 1) designed for the RV14. However, for my Superior XP400, I substituted a Vetterman trombone system (2x 2-in-1) which does not cross under the sump. Has anyone installed or investigated the C3B6 IO-390 (Thunderbolt, non-certified) engine for an RV-14? I realize I would face changes in cables (throttle and maybe mixture) but I?m more concerned with intake and exhaust pipe spacing and clearing the sump itself.