FIA Homologation papers - GROUP A/C PF50 PF60 and PF60E ZZR

[F3ARED]

Accidentally found these earlier - have looked for them for a long, long time and never been able to find them until now, seems the FIA have updated their website. Official homologation paperwork and details - lists a lot of important dimensions, weights etc.

PF50 Chassis
http://historicdb.fia.com/sites/default ... roup_1.pdf

PF60 Chassis - G180z
http://historicdb.fia.com/sites/default ... roup_1.pdf

PF60E Chassis - G180W
http://historicdb.fia.com/sites/default ... roup_1.pdf

N-

[OTD 079]

I wonder what disc the used for the Group 2 Ventilated setup?
It says:
VENTILATED FRONT DISC BRAKE, PHOTO F
PARTS No. 91305324.
DISC THICKNESS : 22 mm
Perhaps Piazza??
Still using the standard looking gemini caliper (perhaps with a spacer block to make room for the thicker ventilated rotor)

[F3ARED]

Hey mate,

Was wondering if anyone else would pick up on that! Piazza was my first thought as well, part number is consistent with GM numbering convention as well. Have tried one of the parts suppliers I know so far and no luck, will try my brake bloke shortly - if he cant find it, it doesnt exist. Coxy seems to think it may be an Isuzu Sport only item hence its missing from parts books, however given the small budget Isuzu had to work with i think it [the disc] may have been a parts bin special.

Caliper appears to be standard halves spaced out - the document lists only one piston size for front indicating that there was no alternate caliper available/homologated.

N-

[F3ARED]

Just spoke to Goce.

PARTS No. 91305324.
DISC THICKNESS : 22 mm
Minimum thickness: 20mm
Diameter: 248mm
Hat height: 45.5mm
Centre bore: 57mm

Didnt come up as a listing - searching part number in his system just returned the GROUP 2 ONLY listing. It may POSSIBLY be the JDM JR130 G200z/G200w Piazza front disc as from memory the turbo Piazza rotor was 260ish? Turbo Piazza didnt come till later though so it makes sense that it would be the JR130 not the JR120.

2 have been found in Victoria. Will be confirming dimensions and availability later this arvo....

N-

[OTD 079]

This is the information for the Piazza fronts:
Part # RDA7532 (Pair)
Type Vented
Diameter 250mm
Hat height 32mm
New thickness 18mm
Minimum thickness 16.6mm
68mm hub hole
4 bolt

So it is definitely not Piazza.

[F3ARED]

Are those disc dimensions for JR120 / Piazza turbo? I cant forsee the JR130 / Non turbo hat height being massively different but you never know i suppose. Thickness rules it out immediately though.

We got a pair in yesterday, measurements match up with what is listed to the FIA doc and the supplement attached to it in terms of dimensions. Description states IMPORTED GEMINI. However, the interesting bit is despite the details matching what the computer says it should, the centre bore is substantially smaller than Gemini hub AND they are drilled in 4 x 100 and not 4 x 88. I almost get the impression that Isuzu may have used the same disc down the line as a floating disc, possibly on the JT Geminis? Anyone able to confirm the dimensions for these? Photo in FIA papers definitely shows the disc as being bolted TO hub like standard Gemini.

[OTD 079]

Are those disc dimensions for JR120 / Piazza turbo? I cant forsee the JR130 / Non turbo hat height being massively different but you never know i suppose. Thickness rules it out immediately though.

These dims are for the Aussie YB turbo Piazza's.

Elky will be able to confirm about the N/A twin cam piazza's but I suspect they would just be like the ZZ/R/T front brakes - i.e. standard gemini stuff - solid rotor with twin opposing pistons.

[redzone (coxy)]

Dang, serves me right for not checking this side of the forum for a while! I have both turbo piazza and those other rotors here I'll attempt to take some pics.