47 replies to this topic

[yel327]

I get that mate. My point was I can’t see this situation being any different to what GMH did on the back of HZ-WB with discs and A9X too, that is longer wheel studs and an effective spacer between the axle and the wheel. The spacer in that case being the rear disc. I’ll do the same thing just without the rest of the disc, only the bit that sandwiches between the hub and the wheel.

[Ice]

Gene, these measure with a ruler at what looks like 73mm but would be +/-1mm. HQ-WB is 72mm on centre of rear drums, Commodore is generally 70mm by the looks although it does seem to grow to 71.5/71.6mm on some VT onwards although it may just be a loose fit of the disc on the hub as the other end is 70mm. This of course is only up to the last of VZ.
 
On the back of one of these where it mounts to the hub face I can see 5/120 but it is scratched off after that from the centre of the 0 from wheel fitment. It may have said 120.65 or 120. I stuck one of my 9" axles into the holes and did up two adjacent nuts. The others were either central or just off centre of the other holes, hard to say for certain. Bloody 9" axles are 70mm spigot too so they don't centre off the hub. I've got some old 1-tonner axles upstairs, will drag one of those down and try it.
 
Once the tyres are off are the wheels easy to pull apart? I wouldn't mind trying to reverse the centre and see if it works. If it does I could simply buy new rim segments for the front wheels. 

Thanks mate
Will suss it out tomorrow arvo after work

[dattoman]

If the offset and everything works out correctly with the 8mm spacers Hoppers used to recommend

Just get them tacked to the wheel flange (alloy spacer of course)... then they are technically part of the wheel.. .and no longer a spacer... so should pass any scrutiny as they stay with the wheel not the car

[yel327]

Good advice Datto.

[yel327]

How much caliper to the Simmons wheel bolts do you need?
I tried 6mm and the caliper just grazes the bolt ends that stick maybe 3mm proud of the nut. Most are only about 1.5mm to 2mm proud and the caliper clears these.
With 9mm clears easily.
Is a few mm enough meaning 8mm spacers or should I go for 9 or 10mm?
Not sure what the bolts are, could try and get ones 2mm shorter but then the bolt ends would be flush with the nuts. I’d probably get away with 6mm spacers doing that.

[Ice]

Back space is 145 mm which is 5.5 inch
bore size seems to be 60 /61 mm

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[yel327]

How wide? Might be BMW?

[Ice]

Outside lip to lip 205mm internal lip 180mm so they would be 7s ?

[yel327]

Yes, 7”. Must have a really small front polished rim part.

[Ice]

Yes, 7”. Must have a really small front polished rim part.

They have but i can get my hands on 2 x15x9 for the rear

[skap]

Gene likes small polished rims.

[yel327]

I think the 5.5” backspace is too much for the front of a HZ. That is 1.5” offset on a 7” rim. I reckon they’ll be scrubbing on the steering tie rods. The 7” PE1 rims come close, I think these are about 0.34” offset. I’d say you have either 5.5” back and 2.5” front or 6” and 2”.

[Ice]

Gene likes small polished rims.

Seriously

I think the 5.5” backspace is too much for the front of a HZ. That is 1.5” offset on a 7” rim. I reckon they’ll be scrubbing on the steering tie rods. The 7” PE1 rims come close, I think these are about 0.34” offset. I’d say you have either 5.5” back and 2.5” front or 6” and 2”.

What about with the spacers ?

[yel327]

Something like a 1” spacer though? Lot of wheel studs! Stick another rim on the HZ and see what clearance there are to the steering arms, then measure it’s backspace and see how much further you can go inwards. Not that up on HZ backspace but I’d be surprised if you could go over 5”.

[yel327]

You saw how long the wheel studs are on my hubs and that is with discs slipped over them. With 9mm of spacer (.35”) there isn’t really enough stud left for nuts.

[Ice]

Ok bit of trail and error i also forgot to mention i have a 9 inch rear end with 1/2 inch studs still HZ pattern though
i dont really want to run spacers if i can not a fan of them
worse case scenario and it becomes to hard basket i will just sell them
i got a set of Rally wheels under resto atm as well no probs fitting them

[yel327]

Fronts will be the problem, no steering arms on the rear! Just leaf springs to hit.
Send two over here, might need the front bits of the rims to turn my 8’s into 6’s.

[Ice]

The outers on these rims are toast ,pitted alloy to deep to polish out Byron

[MRGMH]

I have the same issue same wheel same brakes identical. Brake caliper unfortunately won’t work with those wheels. I am not taking them off and going to use hq setup.

[yel327]

I'll be keeping the brakes, and either using some small hub-centric spacers or turfing the rims. When the whole Covid stuff settles down I'll take the wheels, axles and hubs down to Sydney and get some spacers and rings measured and made at BSA. I'll only use these wheels to change it up from time to time, will normally run Chevelle SS rims.

[Rockoz]

Gene

As already mentioned, the PCD on the Commodore and H series is different.

Not by a huge amount, but enough to snap wheel studs over time and cause an embarrassing moment.

 

 

Cheers

 

Rob

[Ice]

Yes mate i know they are different but its funny i run 15x6 Ute pursuit wheels on my HQ stud pattern trailer which i run with light truck tyres
and i have never snaped a wheel stud and i have had just under a ton in there many times

[yel327]

Not having a go Rob as it is everywhere, but I wish people would stop using the term “H series”. It is really a stupid term, probably originated in one of the online asylums like Facebook. There is 5 x Holden series with the same 4.25” PCD as Torana, and 4 with 4.75” PCD plus a “W series”, so it is obviously silly. Plus the one “H series” Torana and a “H series” Vauxhall.
HQ-WB are W body Holden and Statesman. It is how GMH refer to them in their own literature.