I'm with the OP, I want to duplicate the SK kit. I'm in a worse spot though, being in Canada when most of the parts are made in Aus. I've been researching things for several days, looking at parts and alternatives. I already have adjustable FUCAs RUCAs and tension rods (easier to get here because they're the same as S13 and Z32 items), so I'm only looking for shocks, springs, and sways. Heres some of the data i've collected.
R32 GTST Suspension
Whiteline
BNF28Z FR 24MM blade adjustable
BNF28 FR 24MM swaybar
BNR26X RR 24MM swaybar
BNR26XZ RR 24MM blade adjustable
Bilstein
B46 1473 FR Bilstein Sport B6 GTSt
B46 1474 RR Bilstein Sport B6 GTSt
Bilstein model numbers appear to have changed, using the new format,
F4-B46-1473-H0
F4-B46-1474-H0
Whiteline Springs
73175 Front
70191 Rear
I've also been researching stuff like spring rates in an attempt to find other parts that might be easier to get in canada.
(comments from SK)
The standard spring rates are around 3 kg/mm. Knowing the local conditions, aftermarket Australian spring makers upgrade that by 20-25% to allow for some lowering. Hence it is rare to see a Whiteline, Lovells, Kings etc spring rates over 4 kg/mm.
The valving in the Group Buy R32GTR Bilsteins will handle up to 310 lbs/inch (5.5 kg/mm) on the front, which is around 40% more than what you currently have. The rear Bilsteins will handle up to 260 lbs/inch (4.5 kg/mm) which is around 25% more than what you currently have. The most common upgrade for the track day guys is 275/225 which works very well with the usual R type tyres (RE55, A048R, R888, D01 etc)
R33GTR Bilsteins will handle slightly more spring rate, R32/R33GTST and R34GTT slightly less.
front Whiteline spring is 165lb/in (2.92kg/mm) and the King spring is ~175lb/in (3.1kg/mm).
TIEN
S.Tech
Ride height drop front: -32mm rear: -30mm.
Spring rate front: 2.9kgf/mm rear: 3.5kgf/mm.
Spring rate front: 162 lbs/in rear: 196 lbs/in
S.tech
SKN18-M1B00 HCR32 2WD Front 2.0-4.2K / Rear1.3-3.2K drop front -45mm rear -30mm
(different numbers from different websites)
SS jap spec
Ride height drop (mm) front: -45 , rear: -35
Spring rate (kgf/mm) front: 5,0 , rear: 4,0
Spring rate (lbs/in) front: 280 , rear: 224
(NISMO)
GTS-T S-tune 5.3kg (295lb) front , 3.9 kg (220lb) rear.
5300S-RSR20
-4-Way adjustable
-Short Stroke Type
Suspension Spec:
Damping Force 0.3m/sec, N(kgf) Front (step 4) 1528/521 (156/53) Rear (step 3) 1343/518 (137/53)
Spring constant N/mm (kgf/mm) Front 52.0(5.3) Rear 38.2(3.9)
Vehicle height change Front~ -20mm Rear~ -15mm
HKS Hipermax II
http://www.importscene.com.au/prod538.htm
Springs F=59N(6kg/mm)/R=49N(5kg/mm)
Damping Force Piston Speed 0.1m/sec:
Front Bump 363N (37kgf) Rebound 1294N (132kgf)
Rear Bump 167N (17kgf) Rebound 764N (78kgf)
Drop Front -32mm Rear -43mm
Free length 250mm