I'm wondering if i need a map sensor if i'm only going to be running maximum 10psi and if i do run it now without a 3 bar map sensor and i get it tuned on crome or s200 will i need to retune it later if i do get a 3 bar map sensor

 

Try the forced induction forum.

I'm pretty sure the OEM map sensor can't read 10psi - but I could be wrong.