ECM/Programming differences - Page 2

EFI Live or HP Tuners are pretty much your only bet for modding like that.
 
Jet, Hypertech and stuff like that have pre-made "generic" tunes in them.

Thanks. I'll read up on those two options.

I know with subaru's, If you start modding intake, or turbo back exhaust system you have to tune for each mod or you'll mess up your car due to the change in air fuel ratio and other variables that get changed with each mod. Does that go for Blazers??

Adding an intake and exhaust to the Blazer doesn't really require any tuning... It frees up restrictions in the stock system, letting the engine breath as it should.
 
It's a little different for your Subie because of the turbo.

Got it. Thanks, so will tuning the blazer with the mods help with performance and reliability??

I was never really into cars. Had a 93 subaru impreza L before my wrx and i was into suspension, not really power. Since i've gotten my WRX i've been getting more and more into cars, particularly subaru's. but now that i know what i want to do with my subaru and I cant put in a bigger turbo system until i save up for a 6speed transmission swap, i figure i would mod my GFs blazer. The "modding bug" i tell yeah, once you start, you cant get enough. hahaha

A good tune will help any vehicle, even if it's bone stock, but after an intake upgrade, and exhaust upgrade, you don't really need to tune it any...