if i swap a 3 inch to a 2.8 pully on my supercharger do you think i will need to change anything else on my car such as a belt tensioner or injectors or do i need a retune.

i herd it was ok to run a 2.8 with gm stage 2 retune i just want to no what other people think

 

dont do it... your elevation with screw you.. if you were on the coast.. might be able to pull it off...
just pick up a 2.9 from nherb.. will give you a little more pep and you should be fine... no point in being risky when your talking a few hp/tq difference

 

2.9 man

 

get a 2.9 pulley

 

where can i pick one up at and will it fit the gm stage 2 hub

 

being on the coast would be worse.
hes at about a thousand feet,
being on the coast, at "sea level" will allow more boost.

the higher up you go. the less boost you get.

 

your right... but this is beyong how much boost.. elevation plays a much larger role in tuning.. not talking about how much #'s..

 

ahh k.
ya learn somethin new every day i didnt know tuning got harder at alt.