Who's offering complete direct port setups? I like TNT, but I've seen the NX setup with the custom rails and it looks good. What's the smallest shot you can run, and is it safe on a stock bottom end with an upgraded fuel system?

 

I just found that NX direct port kit from Nitro Dave's. Not a bad price, either. Would it be safe to hit a 150 shot with the upgraded rails along with highflow pump. What about injectors?

 

why would you need a DP for 150hp? besides, it would be tough to get jets small enough to run 150hp at our fuel pressure. best thing to do is run a separate fuel system (using race gas) that only feeds the DP at like 10psi. you can always get bigger jets for more hp, but the smaller you get you take the risk for just not putting out enough juice.

 

Unless you're thinking 200-250+ the DP setup is a waste of money. DP is a wet setup so you're injectors are out of the picture, no need to upgrade them.