Thanks for the info guys. I will check out that other thread, but I'm all about weight, so not really interested in big vented rotors (10" is about the limit for the wheels I have). Was just wondering if something like this exists in the aftermarket that will fit the GT hubs:
https://rimmerbros.com/Item--i-208715XDlord13 wrote:A picture of what set up you have would help because as far as I know all the discs bolt up the same, but I will try to answer your questions...
1. All hubs are the same in the way they bolt up, but on the OHC ones the caliper bolt holes are further out from the center to enable larger discs.
Here are the 2 types I was thinking about. The first is my GT setup, the second I found somewhere on the interwebs, on a thread about HB Vivas, but now I have to wonder if it was HC, or something altogether different:
lord13 wrote:2. Girling set up was used on OHC and OHV viva's,, the lucas set up is the later system.
3. Very hard, everyone wants them.
OK that changes my plans. I don't want to modify (and possibly mess up) something rare and desirable.
lord13 wrote:4. Possibly, I don't know.
5. People have fitted escort hubs, or you can get ally ones made up with any bolt pattern you want.
Escort hubs fit right on the Viva spindles with no modifications? What year/model Escort? Having my own custom aluminium hubs made isn't completely out of the question, but then I'd likely change spindles to something less rare at the same time.
lord13 wrote:Incidentally viva hubs are 4 x 4" PCD not 4 x 4.5"
Yes, I need the 4x4.5" to fit the street (14" Rostyles) and race (15" Draglite) wheels. Hence why I was considering modifying the GT hubs.
lord13 wrote:So there you go... I may be wrong on some points as I only know about domestic models and exports may have been different, I'm sure some one will set me right
I do appreciate the info. Across the pond here, there's very little knowledge of these cars, and parts interchangeability with other cars is a complete mystery. I have both the UK Vauxhall OEM Service Manuals, and the GM Canada Envoy Epic & GT manuals (and GM parts book) but there's so little information in them, compared to all the other OEM manuals I have for my other vehicles, so they're not much help.
New question: besides the Girling vs Lockheed brake differences, what are the differences in front disc brake setups between the HB GT, the non-GT HB discs, and the HC stuff (as far as spindles, hubs, rotors and caliper interchanges go)?
thanks again for the help,
Ed