Well Im planning On running a set of HX35-14/HT3B twins here in the near future, and also upgrade my injectors to a M4, along with my TST Comp and Smarty. What kind of power will I be looking at with my HO pump? I am wanting to eventually end up with a good usuable 500-550hp but don't know if its going to be that easy with my pump. Am I right when I say that a Mach 4 is as big as I should go on this pump?

 

yes if you dont plan on going any bigger.
you would be in the 500 range with that setup.
you could always go with 5's or 6's(they arent that much more) and switch to a SO pump later on, cause you ll only be satisfied with 500 for a little while.
they got 6's for $750 in the classified.

 

Those, and a 62 class turbo with a Smarty/TST PM3 COMP stack put Brian over 500...

500 is doable on a HO pump.

 

I was thinking of swapping pumps down the road, is there any downsides to running an injector that big on this pump, like draining the plungers etc.? I was also thinking they might be a bit hot, seeing as I do tow with this truck. I think the little 35 up top might not cool 200 hp sticks too well!

 

i thought you were talking about twins?

 

Do twins then do stixs. you got plenty of fuel for now! no sense and buying stixs, 3 times.

 

Not if you're getting twins Get the 5.7's