That list is more or less a minimum requirement to turbo an S50/M50
At that boost level you can get away with out an upgraded HG
but if your going to do the head bolts you may as well do the HG.
If you only need tips ill make a list
Handy hints...
1. Oil feed for turbo.
Tee off the oil pressure sender at the back of the
oil filter housing.
2. Oil Return for turbo
Drill the sump there is pretty much no other
way around it.
You can feed it to the sump plug but don't,
cause its gay
3. Injectors
Most bosch injectors will fit your rail
Failing that you can use RB26 injectors
but they do need slight modification and a resistor pack
4. Turbo Manifolds
TRADEME MANIFOLDS DO NOT FIT!LHD MANIFOLDS
CAN NOT BE FLIPPED AND USED AS RHD TOP MOUNT!!
I had to modify mine beyond recognition to get it to fit
and is now a two piece bottom mount manifold.
When purchasing a top mount manifold make sure
the turbo flange sits forward, further than cyl # 1
pipe on the head flange. (Easier to get a custom one made)
5. ENGINE
Standard engine can be boosted but dont expect it to live
long if your thrashing it.
At a minimum upgrade the head studs and use a thicker HG.
Repco has a listing for a thicker OEM HG for an M50B25,
which lowers the CR to around 9.5:1
Im not sure if theres a similar listing for S50 but its worth
giving them a call
6. ECU
Don't f**k around GET A LINK or other standalone.
USA tuners make straight replacement chips for
turbo conversions but they are expensive (read. $300US+)
Thats all I can think of atm but Im sure others will add to it
if Ive missed anything
DISCLAIMER.
DONT BLAME ME IF YOUR sh*t BLOWS UP!!
Dont take this info as GOSPEL!!
This is just my opinions from my own experience
with the M50 turbo conversion!!