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How come whenever I add a turbo kit my top speed decreases? For example, I used to have a Lancer with all turbos mad acceleration but cuts @ 125! That sucks. So I sold it and got a Nismo, tested top speed @ stock it can go 180+ but when I turbo charged it the **** can't even get pass 179 and start decreasing speed. I didn't give up and brought an E55 AMG tested @ stock, goes as far as 184+, turbo charged it, can't even get pass 174! Money wasted and less top speed. Any way to keep a stock top speed with turbo?