Which compressor housing does this have?

Found one:

HONDA NR500 sound

That's the oval piston guy, though it looks like it might be a 750.

Yeah Blake, thats the street bike version "NR750".  They don't sound anything like the racebike.

NSR 500, apart from the "big bang" version, sounds like every other 2 stroke screamer.  There were both V3 and V4 versions if I remember right. NR 500 (the 4 stroke one) sounds kinda like a 4 rotor.  There has to be a sound clip on the interwebs somewhere.

I had a Canadian Suzuki RG500.  Of all the things I wish I had back, that's pretty much the top of the list.

Speedfab he had it backwards but is correct. Yamaha street bikes and motogp bikes have all made the switch from flat plain to cross plain cranks. The M1 was not the first to do this the Honda was. But Yamaha was the first to start doing it to their street bike.

They have been going back in forth from big bang flat plane cranks since the introduction of four stroke bikes in 2003. Big bang was more for traction than for power. It was about how the power was put down. They found with the power coming in hits with small gaps between them the tire would spin less.

This is the current Yamaha YZFR1 cross plain crank.

Yes, I know what the Japanese motorcycle manufacturers have done with their MotoGP engines... but that couldn't be more non applicable to a 180 degree crank in a V8, something which far predates 4 stroke MotoGP. (Which I personally hate.  Bring back the 2 strokes)  What I was saying was that this idea has nothing to do with MotoGP nor did the "idea" come from Yamaha.  Also, all moving of power pulses in those bikes is a tractability move, a given displacement will generally make x amount of power no matter how you lay it out, all other variables (like airflow and internal friction) being equal.  The term "big bang" got generally applied to all cases of moving power pulses closer or simultaneously firing cylinder pairs regardless of the means... although I personally think it applies better to the firing in pairs and making an inline 4 effectively into a parallel twin than it does to the "every other 90 degrees" deal like the current Yamaha.  You can bet they've made almost every crank shape and cam/ignition alteration imaginable testing those things, just as you can bet few people outside the factories will ever know what worked, what didnt, and why.

Oh and "big bang" racebike setups predate modern MotoGP too, by at least 20 years.  My first year of college in the mid 80s was the year Honda made the flat plane crank odd cyl angle V4 "big bang" 2 stroke NSR500 GP engine... but they went back conventional a year or 2 later.

As an aside, if you want to see one of the coolest 4 stroke engines ever, search "Honda NR500".  It was an 8 valve per cylinder V4 with oval pistons that turned nearly 20,000rpm.  In the late '70s Honda didn't want to give in to 2 strokes yet.

this big fucker came,  it is way bigger than i thought it was going to be.... lucky it fits, sorta. haha

You sound JUST like several people's mothers I know.

I believe they are getting the idea from Yamaha with what they have done with the cranks in the R1's since 2009 and the MotoGp M1's and applying it to a V8 crank.

inline 4/90 degree V8 = apple/orange.  Totally different scenario.  Also, what you are talking about is what they call a "big bang" engine, taking something with an even firing order and making it uneven, either by changing ignition and cam events, or by moving crankpins as well.  This is done to change the engine's power delivery characteristics in order to make the powerband less violent and more motorcycle road racing friendly.

A flat crank V8 uses the same power pulse timing on each side as nearly every standard inline 4 cylinder in the history of internal combustion.  Maybe they got the idea from the Ford Model T.  (before somebody goes all pedantic, yes I know model Ts have the #2 and 3 rod journals on the same side of the crank)

INTJ?  ISTP?  Are you guys making fun of me because I'm a LOCO engineering type?

No... You have more foot pounds of torque under your right hand daily than the cumulative total of every car on this site.