I'm planning on building a fun DD. I want 600-650hp nothing less then 600hp. My question is can the stock LB7 bottom end hold togeather for that? I just don't want to build a fully built engine yet. Any advice will help

 

That's in the territory of the rods might or might not take it. Depends on tuning and use of the truck. Not saying they can't live a long happy life there but things can also happen in that range.

 

I want to take it somwhere and get them to custom tune it the right way. The dyno and everything else, the hole 9 yard. The truck will stay on the economy tune for the most part, but I'd still like to get on it every once and a while without worrying.

 

it will hold it for a while, depending on how often you get on it, the stock turbo will be crying at that level. if it will even make it up there.
you might have to get some bigger injectors and fueling upgrades to hit that as well.

 

I was thinking a GT4294R turbo and a modified CP3 but I'm open to ideas and sujestions. I dont really want to put the money in after market injectors though. I just want a reliable 600hp dirty

 

lift pump is needed as well. you will drain your cp3 without it.
with a turbo and cp3, good tune, lift pump, exhaust, intake, and a built trans you should be able to hit that mark.

 

4294 is a big turbo. you can hit that mark with just a 4094.

you can hit that with stock injectors, lately though people have been finding it more reliable to run bigger injectors to cut down on timing and pulewidth when they run over the 600 mark on stock bottom ends.

 

Yeah all of that's getting done but not if I can't keep it reliable at 600hp.

And can I just do bigger nozzles instead of complete injectors and still make that reliable? I mean theyre a lot cheaper

 

there is plenty of guys who have daily drivers that run that kind of power, but everyone like to push things to thier limits .

 

ha that's true. So do you guys know of anywhere that can put tunes on my truck in person on the dyno to make it what I want?