That depends. Could you perhaps be any more broad about your question? Or is that as broad as you can be?

 

Like if I rev it at a stand still sometimes I get some black smoke other times ill get white smoke

 

its probably not white in that case; its probably actually blue that LOOK white. That is prolly oil. Check really carefully next time; if its oil, you may just be consuming some, or else you may have bad turbo seals or some oil sitting in your charge piping.

 

the white smoke is probably from air in the fuel too from an intermittent leak

 

Air in the fuel? Only when he revs it? Sounds like turbo seals or oil consumption to me.

 

Blue isn't that also a head gasket too? How much boost should I be pushing stock?

 

Dont remember stock boost.. 8-10psi maybe? I think?

But no blue generally doesnt mean headgasket.

 

8-10psi? I could hit about 23 or so at WOT in my 96 w/NV4500 (215hp)

the different hp engines have different wastegate specs

 

Man I feel like its only on like 8poubds its a dog I want like 25 psi I know thats safe and I need to remove this stupid egr system on this thing

 

Oh no kidding.. I didn't know the different pump'd trucks have different wg specs. THanks for that info. But you hit 23psi STOCK?

The holsets can hold 32psi and be good to go...