My accel super ram system won't rev past 4700rpm.I have changed the settings on the dfi and tryed everything I could think of. It is like a rev limiter cuts on But I changed the rev limit to 8000rpm and still the same thing. Does anybody know anything about this.

Are you running the stock intake bellows? If so It could be colapsing. I had it happen to me and thought it was a rev limiter thing too. Did some datalogs and saw that map would drop ~5000rpm's and car would get rich. Found out it was the bellows, I renforced it on the inside and it solved the problem.