I recently just got my SS/SC and I don't have an H/E yet and was wondering if I would be safe running a 2.9 pulley with the mods in my sig.

 

it wouldnt be wise to run with a stage 2 tune... at all....

 

yea you should be fine...i've ran everything down to a 2.8 i'm running a 2.85 now fine no problems with 1 step colder plugs

 

I have a 2.9 with my stage 2 (+ full exhaust, intake, etc).... And my 42's are 118% maxed out.. I need 60's right about now.

You can run it though if that's your question.. Nothing crazy will happen.. Just wise to get your 60's, H/E, etc. (as you suggested).. And a tune...

 

2.9 on a GM stage 2 tune will be ok.... but i would believe you'll benefit more from a custom tune.

 

i ran a 2.9 and GMstg2 tune for almost a year and a half, no problems at all. Would be more beneficial with a new tune tho