What's the weak point in my motor?
 

LS1 block for turbo
Mahle forged pistons
Eagle H beams
Stock Crank
LS7 lifters
Hardened PRs
ARP Main and head studs

What is going to be the limit to how much power I can make?
And how much should this be able to support?

its good combo i think ,but just one thing....why the Ls7 lifters?? if your going to spend lots of mony go for more relible parts i wouldnt name a company you need to search but i think ls7 lifter is not relible on high boost application .
i think you can go aroung 700-800 hp with no problem of course with good set of heads and lower compression .

n/a or power add?

Honestly if this is for a Turbo motor, I would have like to see you use a different piston, Diamond, JE, Wiesco, etc because of type of forging material, and upgraded crank maybe?

I think the crank is fine unless he starts getting into big boost... but I do agree on the pistons. I went with Wisecos on my build.

How are the Mahles on nitrous? Say a 250 shot?

I too am wondering I have some of those same pistons I want to run a 200 shot

Turbo

My engine builder recommended this piston for me.

I've heard a lot of good things about them, as well as people using them in higher horsepower builds. Why would boost make such a difference with these lifters as opposed to a super high lift cam? I have seen these used with some pretty large cams. I plan to run only an LS6 cam.

Let's keep this on topic please.

So what would fail in the event of a boost spike? A meth kit will go on eventually. Say it runs out on high boost, what do I have to worry about?