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Posted 03 July 2014 - 11:51 PM
The reason its a no - no under most circumstances is because people use the wrong studs and centre hole size
Not to mention stupid offsets with no dish
Posted 04 July 2014 - 07:18 AM
Posted 04 July 2014 - 06:26 PM
Yes I thought of that today. I will buy some Commodore studs first and give one to the machinist. But the shank has to be larger than the thread so I am assuming the percentage will be similar.
I have a set of VP Calais IRS wheels for my UC. Offset is 28P.
I will check the spigot hole to HZ rotor and see what needs to be done there too. Wheels are alloy so not sure if they were originally a tight fit.
Posted 16 July 2014 - 07:47 PM
Main reason I would consider redrilling HQ to Commodore would be to match the VL diff going into my ute ... good point about the offsets though, can anyone tell me what the standard offset on a HQ was???
Posted 16 July 2014 - 09:33 PM
Around 13P I think you'll find.
BMW have a range of offsets and sizes in Commodore pattern. Not sure of spigot hole diameter off-hand but there is heaps of info on European wheels out there.
ps. My VP centre holes are too small so I will get the HQ discs machined there as well.
Edited by Lazarus, 16 July 2014 - 09:41 PM.
Posted 17 July 2014 - 07:39 PM
Thanks for that should be able to work something out I reckon ...
Posted 19 July 2014 - 05:55 PM
I'm in a similar predicament with my wheels. I've got an '85 Pontiac TransAM with the same WB/HQ stud pattern and offset, and running 15" x7.5" and tyres are starting to become expensive.
The other issue is that while these cars usually look better with 14's & 15's, the wheel arches on these cars just have a rediculous gap, even with lowered koni suspension.
I've got a set of adapters to convert from HQ/WB stud/hub to VE commodore, and I'm now looking for a set of VE 18" rims to put on it and see if the fitment/look suits, but I'm still having issue trying to convert US offsets and aussie offsets which seem to be in +/- mm offsets as opposed to the inch backspacing the yanks use.
Can someone tell me the difference between the HQ offset and VE offsets?
looking at a post on the pontiac forums:
15x8" - fronts 0mm offset front rims/4.25" of backspacing. The positive 16mm rear rims (16mm/25.4 = 0.63")/4.9" of backspacing.
I have 1" spacer/adapters with VE hub conversion btw
Posted 24 July 2014 - 05:22 PM
Wheel hub adaptors are not road legal AFAIK, in NSW anyhow.
Posted 24 July 2014 - 05:37 PM
There is an article on wheel adaptors and spacers in the Street Machine Dec 2006 issue page 127. They reported that unless there were a factory option, wheel adaptors and spacers are illegal in all states and territories.
Personally I would not trust an adaptor bought on eBay. If you do loose a wheel and have an accident then your insurance company will have to option of refusing the claim.
Posted 24 July 2014 - 09:50 PM
Some of the performance wheels from the States come in Ford or Chev offset and dual stud pattern. Ford (pre AU) is about 8mm more than Chev / HQ so you would still be legal with a fraction more dish and track.
Or get some of those GTS style Long Beach Customs in a 17 X 8.5 or 9" width and they should fill your guards ok.
Edited by Lazarus, 24 July 2014 - 09:51 PM.
Posted 24 July 2014 - 09:55 PM
Yep, options are so plentiful now days, its not worth trying to adapt hubs.
Posted 23 August 2015 - 04:23 PM
I got out my shovel and dug this thread up as I have a question.
Has anyone tried or inquired about the DBA 014X front HQ discs as they have a 120 PCD not the HQ standard 120.65?
Posted 23 August 2015 - 06:13 PM
Someones telling you stories
DBA014X is HQ pattern
Drilled and slotted rotor
Posted 22 March 2017 - 03:00 PM
Hey everyone long time no see, been busy doing stuff. Just for those that may be contemplating, the HQ to Commodore re-drill is possible, I have done it to my ute after a fair bit of trial and error. As others have said, not necessarily a preferred option, but worked out well for me. Cost around $100 to get the re-drill and machining for the center spigot done (per rotor), and about $50 for the new studs. Opened up some options for wheel choice, but was restricted somewhat by the tie rod ends in the end. Settled on a set of Group A Walkinshaw wheels, happy with the look.
Also upgraded the brakes to a full twin master cylinder and dual diaphragm booster, all hidden away under the tray. Very nice pedal feel now and stops very well since the car is so light.
WP_20160310_18_00_02_Pro.jpg 84.77K 1 downloads
WP_20160310_18_00_36_Pro.jpg 76.75K 1 downloads
Was some extra machining involved to clear the centre caps of the Walkinshaw Wheels:
WP_20160118_17_20_09_Pro.jpg 70.33K 2 downloads
All out of sight, through the floor pedal retained so still looks stock from inside:)
WP_20160301_14_24_32_Pro.jpg 112.3K 2 downloads
VL Commodore disc brake rear
WP_20160319_15_41_49_Pro.jpg 103.45K 2 downloads
Confused the wheel alignment place, they knew they were HQ rotors but couldn't work out why the Commodore wheels fitted properly - they saw the machining for the centre spigot but couldn't pick quite how I'd done the studs.
WP_20160310_16_38_37_Pro.jpg 87.64K 4 downloads
Next project is to replace the Trimatic with a 5 speed, since I've blown up another one ...
Posted 22 March 2017 - 03:06 PM
On the subject of the Walkinshaw wheels, I want to put them on my van to match the Ute, does anyone know of a electric trailer brake that will accept them (they need a disc brake rear on a car not drums) The spokes foul on the outer edge of the drum brakes generally. Are wheel spacers legal on a trailer / caravan? If the spacer were welded to a drum would they still be considered a spacer???? Obviously would need longer studs and so on ...
Posted 23 March 2017 - 06:26 AM
If it is welded it is no longer a spacer, it is part of the drum/disc.
Posted 03 May 2017 - 03:34 PM
Cool thanks for that it was what I thought.
Posted 30 October 2017 - 10:13 PM
Posted 19 June 2020 - 06:14 PM
This seems the best place to submit my query to the collective brains trust!
I have had my 2/77 LX Torana for about 6 years and I have never stuffed around with the front end because it is soooo goood! It handles, corners, nil bump steer, and keeps the wheels planted. BUT I have always been worried that the original B45 Simmons wheels don't match the PCD exactly. Can anyone tell me from the photo if this would represent the difference between 120mm studs and 120.65 wheel PCD?
If so, can I readily change the rotors to the larger PCD with everything else remaining the same? What would I be ordering; HQ rotors?
I don't want to change the wheels as these are my all time ever favourite wheel.
Posted 19 June 2020 - 06:44 PM
I don't know the answer to your question, I do see what you mean about the wheel nuts not looking centred and as it looks like they are all closer to the centre it could make sens as the Commodore pcd is small.
I would guess there is some sort of serial number on the Simmons centres and if you called Tempe Tyres they might be able to i.d. the pcd.
Just an idea.
Posted 19 June 2020 - 06:44 PM
Edited by yel327, 19 June 2020 - 06:47 PM.
Posted 19 June 2020 - 07:51 PM
A close up on the wheel fitted with a single nut removed may help, the wheels obviously have clearance machined around the nut that is offset (probably because the nuts are so close to the centre) which makes it look a little odd, but we can't see the tapered seat itself. If it wasn't right you'd also see uneven wear on the inside or outside only of all seats in the wheel.
Posted 19 June 2020 - 08:11 PM
If you are buying new rotors... I would do the following
Buy DBA014 undrilled rotors (I like slotted... but not drilled)
Same as you have but no holes and no studs
Then I'd take one wheel and the new rotors to an engineering shop and have them drill the rotors to suit the wheels
I'd also fit half inch studs... or at least 12mm commodore metric ones
Just means getting new studs and nuts... not a biggie in the scheme of things
Then you know the stud pattern matches the wheels
And for how often you replace rotors... not really an issue about having to do it again in 10 years.
Posted 19 June 2020 - 08:18 PM
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