Viper horsepower


depends on the style of pipes and the amount of porting, so no real answer without knowing what you have. "Porting" is vague and theres multiple types, trail,lake race style, improved, and pro stock so without knowing what you have hard to predict.

If all the planets are aligned and everything is perfect they can make 160+hp in hot trail set up form but it takes cylinder porting and case porting to be there with the pipes.

Just for comparioson, most stock vipers with just good pipes will be right around 147-150hp, so the basic porting mods adds about 10hp on a viper, how much you gain depends on how well it all works together!

Full race engines in a viper can be 190+hp
 


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