Originally Posted by
champ20B
Well, whatever a 20H conversion makes.......one thing that can be pointed out, being that a factory spec conversion is allowed in A-MOD, is that a factory spec OMC 22cid/25hp powerhead with closed exhaust (on a stock racing tower of various choice) and racing lower, can easily compete with the merc in this category. Again, that's a 25 hp unmodified powerhead.
Now being that the 15ss Hotrod is officially dynode at between 25 and 26 hp stock, that kind of denotes the point of running pipes or chambers on this engine since again, a 25hp OMC fishing powerhead mounted on the same mid and lower can compete. But maybe its the torque of the 25 that makes up for it if the 15 HR is making more hp with pipes. But the same may not be as prevalent comparing the 20H, so maybe it is about 26HP.