Originally Posted by bilt2run
based on those charts the efr holds power out better and considering the small 2.5" exhaust its even more promising, time should tell....
The Dom 1.5 XTR is a very fine turbo. We have installed several on customer cars and I have seen very good results from them. However, while they do spool well, they do not match the EFR7163 on the top end. Boost and airflow drops off much more than with the 7163 which held boost all the way to redline. I actually intentionally tapered off the boost a touch on my car as the stock TMIC was getting a touch heatsoaked in the 95*F temps I was tuning in.
Also consider that the Topspeed dyno graph had the STD correction factor applied versus the SAE factor on my graph. Typically the STD CF adds about 3% over SAE. The Topspeed car also had a header, which I have found typically adds roughly 10whp/20wtq over the stock exhaust manifold.
All in all, the EFR makes more power, has a broader powerband extending all the way to redline and spools the same or better.... I guess that's comparable