Step up from GT4718?

[RonA]

Just wondering what the options might be for a larger primary. GT55 is a whole bunch larger on the turbine side, only slightly larger on the comp inducer. Comp exd. is way larger, but not helpfull. Would it be better to go up to a 66 on the secondary(running a 64 now). Any compressor upgrades for the GT47? I was supprised in the difference the pump made on charger performance. I thought i went big enough, but it might be able to go a bit larger.

 

[malibu795]

64 pendign flow.. "could" light the gt5533 (91mm) pending on turbine a/r housing and pipeing...

66 would light the gt5533 easier

IMO i woudl setup up to the GT5541 (105.6mm) whic you would need a even bigger secondary

vs the 81mm of the 4718

 

[Bponci]

I feel the 64 is better than a 66 hands down. I don't think you would be happy with it. Just my 2 cents.