Regal valanti 170. Omc 4.3 v6

[Tomi Hietamäki]

Boat speed 36.7 knots 4600rmp gps..Very bad conditition hull with old painting. .Now ibought better flame arrestor and better spark plugs..think if i blue printing hull next summer and put 4bb carburettor ..How fasti can get this boat go What your regal valanti go...propeller is 19 alunium

 

[Bondo]

Ayuh,..... Welcome Aboard,...... Maybe 40 mph,....

 

[Tomi Hietamäki]

 

[Scott Danforth]

Going from 2 barrel to 4 barrel will gain you maybe 10-15 HP.

Going to vortec heads will get you another 20hp or so

So from your 37knots to maybe 40knots

Did you replace the batwing manifolds yet

 

[Tomi Hietamäki]

Engine is rebuild 2018..i dont know presiescly what old owner was go in engine..batwings look original and new...is omc 4.3 and king cobra 4.3 diffrence only carburettor..i cant find information..ihave owner manual...

 

[Scott Danforth]

get rid of the batwings before they kill your motor. simply google batwing manifolds

no idea what went into the motor in 2018, however wont change hp much between cheap cast pistons or forged unless there was a blower on the motor. being in a boat, you are limited on cam choices