Anyone know of a few dyno graph comparisons showing a .48ar turbine housing vs a .63ar housing? I'm looking for a T3/T4 57 trim on a GSR to be specific. But any set-up with the above turbine housings will be informative enough. Also looking for a log manifold vs a ram horn manifold dyno comparison. Trying to help someone decide which set-up would be ideal for him and the graphs would be a good start. Thanks.

 

.63 a/r all the way. 300whp or less log would be fine but I would run a ramhorn if possible.

 

He's been running the ram horn with 3" DP and .63 turbine housing at 8 psi boost right now. The initial plan was more top end power but now he's wanting to have a more responsive turbo as he plans to try auto crossing this season and would like to start driving his car more on the street. His current set-up is fairly laggy now and he does not want to increase boost psi due potential engine problems. He was thinking about changing up to a log manifold but I suggested he should try a .48ar housing first as it is more cost effective compared to buying a log manifold, downpipe and dumptube. I just though a nice comparison dyno graph would be very convincing. I've seen a few online when I was searching for myself before but just can't seem to find them right now.

 

sounds like your friend needs to grow some *****.