2007 Grand Prix GT upgrades?
I have an 07 Grand Prix gt with the warranty that just went out. It's completely stock obviously so I'm wanting to get a little more horse out of it. I believe it has about 260 right now and I'd like to get around 300 without any drastic changes such as new heads or anything that's going to be super expensive. I looked at smaller supercharger pulleys but wasn't sure if I would need bigger injectors to compensate for more air. So does anyone have a newer GT with some mods done? If so then let me know.
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Cold air intake absolutely, then a Borla Exhaust to add about 25 hp.
To superb a pair issues. The 2007 Grand Prix GT substitute into supercharged. there substitute into no such factor as a nonsupercharged 2007 Grand Prix GT. And sure they did have GTP's in 2004 and 2005, The call substitute into dropped in 2006.
If you drop pulleys, the injectors are the least of your problems. You'll need a cold air intake to support that, obviously a smaller belt, and a PCM will be programmed to help eliminate knock. With those three mods, you're looking at around $500 to get an extra 15-20 HP.