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Old 04-10-2016, 01:38 PM   #3
Scooby Specialist
Member#: 202947
Join Date: Feb 2009
Chapter/Region: Tri-State
Location: The Hills, NJ
2015 WRX Limited ISM
275/310 PhatBotti tuned


suprisingly with the miles I've put on my car the carbon build up on my valves was not bad, and not enough to warrant spending $400 on walnut blasting the heads. One of the shops I go to (Broken Motorsports in Union City, NJ) the owner Billy has been a long time BMW enthusiast as well as Subaru and has a lot of experience with direct injection. According to him the carbon build up becomes an issue for those that do not drive their cars often, where as I'm putting anywhere from 3-4,000 miles a month on my car it's seeing good usage, along with a very good upkeep on my oil changes and maintenance that my engine did not need walnut blasting. I'm sure others here may disagree but this is one of the few guys I trust with my car and he's a professional. Getting an AOS will definitely be one of the next things I do to this car before I start bringing on more power.
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