do i need to run a twin pump system if i plan on running on race gas and pump

 

well with the lack of information to understand exactly what you mean, i am going to asume you mean a seperate pump and tank for each fuel type (race and pump)?

you could but dont ness. need to unless you plan on switching fuel types and tuned on the fly. its not very practical to do that and definately would be more costly to do right. I dont see a normal application where the benefits would be worth the cost and effort over other methods.

the simplest method would be the more traditional approach of having a tune for pump/ tune for racegas and running the appropriate tune for the fuel type you have in the tank. when you want to switch, drain the tank, put in the other fuel type, and change the tune accordlingly.