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Message: [QUOTE="TMCCOY, post: 1533748, member: 24484"] Nothing solid to report on power but It feels stronger mid to top range with a slight decrease in spool. Probably in the 150rpm range. The 366 with ,91 will start to boost about 1600rpm. This I measure by lugging in 4th to about 1400rpm and start applying throttle and seeing where boost starts showing on my mechanical boost gauge. EGTs are fine. I towed across the country with our 5th wheel and family using 1023 street shredder tune and it was great to have solid power and good EGT control. Could never have done that with the 38r. The 364.5 had the smaller 68mm turbine and all I heard was how much it would help to go to the 73mm turbine and if that's the case may as well go to the 366 I figured. In that regard, I bet the 364.5 I had would be the faster spooling of the 364.5 offerings. So making the jump to the 366 was probably fairly significant change. [/QUOTE]

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