# Finished the Cobalt SS Tune **URL:** \ **Category:** PittSpeed Automotive\ **Created:** [July 17, 2008, 5:12am UTC](https://forums.speedlife.net/t/finished-the-cobalt-ss-tune/198571 "2008-07-17T05:12:34Z")\ **Posts on this page:** 1\ **Showing post:** 30
**Author:** ![1badx](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/1badx/32/6052_2.png) [@1badx](https://forums.speedlife.net/u/1badx)\ **Post date:** [August 12, 2008, 6:29am UTC](https://forums.speedlife.net/t/finished-the-cobalt-ss-tune/198571/30 "2008-08-12T06:29:35Z")
> [@FS: 2002 Subaru Impreza WRX](https://forums.speedlife.net/t/fs-2002-subaru-impreza-wrx/34353/10): > > I have an FMU with a return fuel system setup and 60# injectors. I have a pull thru mafs setup. 3 inch DP with 3 inch highflow cat, then a 2.5 inch catback. NGK Copper plugs 1 step colder. Recirc BOV. I have the wastegate rod turned all the way and the most it will give is 11psi. Im told that if i threw a boost controller on I could get more boost but I still dont understand that concept since with the wastegate fully turned on the gt2860rs there should be no boost being held back. Car has been fully checked over for boost leaks as well and there are none. What FMU are you using (ie. 12:1, 10:1, 8:1 etc.)? Are you monitoring the MAF voltage at boost and is it pegged or close to being pegged? None of these would affect making more boost but can have an affect on your a/f . It’s hard to read your printout but if I’m reading it correctly it looks like your mixture goes extremely rich at around 5300 (if I’m reading the min/max/avg correctly it actually goes negative). I would consider investigating if you are using the correct ratio FMU, you may be creating too much fuel pressure under boost causing the rich condition. As a previous poster mentioned, this could cause some serious issues by dumping too much fuel into the cylinders, washing oil off the walls, causing premature ring failure etc. etc. On the other hand, you say it’s running better than ever and that’s a good thing! --- _[View the full topic](https://forums.speedlife.net/t/finished-the-cobalt-ss-tune/198571)._