How large is the compressor inlet? Mine is a 66, but Ryan's is a 70, and he's the one who asked me why I'm taking mine to 6,000. He shifts as 5,200. Maybe his exhaust turbine is smaller????
I'm going to try a 750 Holley Double Pumper; not sure if that's too big, but Gerry at the G-Pop Shop looked at it and says it's ideal (size-wise,) so I guess we'll see...
Ryan and Tom Wolfe both use 600 cfm carbs and go REAL fast with those.... I may be changing to a smaller carb after I get some runs on this thing.