So I had someone ask me the other day about an idea he had. Like the title states, he's wanting to make a "procharger" FI kit using a belt driven turbo. I actually thought it was a neat idea.. but was unsure if it would really work. His idea is to replace the turbine housing and wheel with a pulley, leaving the center section of the turbo and the compressor housing/wheel in tact.
I ran through some numbers and tried to come up with an estimate of how quick he could actually get the turbo to spin. Assuming that the crank pulley is somewhere around 7 inches in diameter or so (and lets say that the engine is spinning at 5,000 rpm), I came up with that if he could somehow find a blower pulley with only a 1 inch diameter, he could get the turbo spinning around 37,000 rpm.
He said he has a small turbo.. so I'm thinking maybe a T25 or something. I looked up a compressor map for a T25 and found this... (just ignore the engine rpm on here)
I'm definitely not a pro at reading these maps, but from what I see, it's taking around 65,000 rpm from the turbo to flow 5ish lbs/min.
So Basically what I'm thinking is that this idea wont work?.. Or do you think it will give some/any kind of hp gains?