Before someone flames you...try searching around...I know alot of your Qs can be answered by searching "Jackson Racing"..."JRSC"...etc. Good luck!!!
a very good loud indeed. took my first ride in a jrsc'd svt yesterday and the sound was beautiful. at 4k the blower was screamin and the car was pullin. great buy in my book.Search, young Jedi
And, to answer one of your questions, yes, it will be louder, esp under boost. But it's a good loud.
I didn't notice the supercharger whine much at the stock configuration. However, with each boost increase, it got louder (naturally). Even with my fairly loud exhaust (RT cat, FocusSport flex pipe, FS "stealth" resonator, and FS ceramic coated exhaust and running 14 psi.) my supercharger whine is VERY noticeable (i.e., LOUD) outside the car. The exhaust doesn't even come close to drowning it out. Of course, I'm sure there are Focus people with louder exhausts than I have. Yes, it is pretty scary (deafening in an enclosed dyno chamber). According to Lidio, you can spin the hell out of these blowers with no loss of longevity of the blower.I'm in the end stages of trying to get serious power out of my JR M-45. I just got it back from Endyn with a 2.3" pulley, so I have an extra 2.6" I used for about 5 months. To answer as many questions as I can:
about 170-180 WHP / I am trying to get 200 WHP or better with the refit & coating from Endyn and have run 42 lb injectors right from the start / I can't comment on your choice of exhaust - I have a Random Tech cat & a custom exhaust (nice and quiet) / I blew up the stock motor (shattered piston #1, bent the rod - have for souveniers)
because of TUNING PROBEMS / got a new block @ 9.2 - 1 CR from Tom's shop / and lastly the thing screams under boost -
it scares the s#*! out of other "performance" cars when I pass them. NOTHING sounds as cool as a blower whining when you have a quiet exhaust that doesn't drown it out. It was barely noticable with the original pulley. Performance wise it is much better than original, but you have to get PROPER TUNING by a pro rather than a guesstimate chip burnt.