I want another opinion about a 2.9 pulley. I have a 2006 cobalt ss/sc gm stage 2, cai. I am going to get the zzp combo shorty header and dp with cat. I live in San Diego, so do you think it would be safe to do so???


Thank you

 

I don't get what you're asking.......

 

Get a custom tune when you do so, your inj will be over 100% IDC without a tune.

 

To run a 2.9" pulley you would want some cooling mods and would NEED injectors.

 

Don't need inj he has gms2

 

My bad i was thinking in the 2.2 world. 42 lbs have high IDC on 2.2s

 

Sorry, I wrote same insted of safe.

 

Ya, my inj are #42...Or do u think they will still be at 100%?

 

no they shouldnt be 100% pretty sure a 2.9 is the lowest you can run on 42's

 

Ran a 2.9 on gms2 with no problems offcourse with a custom tune but yeah it was about 90 percenr at that point !

 

ya if you lean it out on a custom tune it will be fine, some higher altitude people can do 2.8 on them but that's a whole nother story

 

How much your tune run you??

 

depends who you go to, hpt credits are 50 a piece and you need 2 to unlock your car. then whatever the tuner wants. so find someone who knows what they're doing with hpt, or someone who has access to hpt around you and you can get a tune remotely.

 

ok thanks man.