I rarely chime in on threads like this, however feel there is a bit more to talk about here. First of all anyone who knows me knows I am a fan of power, period, it matter less who or how it comes as long as there is a ridiculous amount of it. That said, the Carl's build turned out great, the motor pulls with authority right off the bottom and got along well with the GTX 2860 at 11k'. It does however fall a tic short on the big end, which is consistent with what find on the natural aspirated units as well. Its a nice motor, and if it were a 1/3 the cost it would be a home run. The trouble starts and ends with the numbers, at more than double the cost of the RKTek 858 one would expect more, bottom line even the RKTek drop in will out leg the Carl's 900 and its less than $800. Generally budget is an important consideration to most riders considering any level of build, if one were to equate horsepower per dollar the choice is pretty clear... As Austin mention the RKTek 858 turbo with a GTX 2863 at a half pound less boost was MUCH faster than the 900 with only a minor sacrifice in bottom end punch due to the application of the larger turbo. For those wondering, the RKTek motor did not like the 2860 at all, it flows way too much air, we will be testing even larger turbos soon to explore the ceiling on this package. More on that later...Hope this helps to clear things up on this matter.
