commodore mags

[skylineroofing]

I wondering how people have gone with clearences with 17inch commodore mags.. I have hq stub commo disc in front but i havent got diff sorted yet..
And if so what size tyres used??
As i have 17x 8 in sitting at home

[Harv]

Haven't tried 17", but have had plenty of fun getting 15" to fit :
http://www.fbekholden.com/forum/viewtop ... =27&t=2849

I guess with the extra diameter you might be lucky and clear the tie-rod ends.

For NSW, you will need an engineering certificate, as the 17" wheels are more than 26mm wider than the largest optional wheel recommended by GMH (4.5") and more than 15mm over the largest diameter wheel and tyre combination specified by GMH (13"). Your engineer will probably require you to comply with Vehicle Standards Information Sheet No.9 requirements (http://www.rta.nsw.gov.au/registration/ ... 9_rev4.pdf). The analysis below is some checking I did for fitting 15" Conformadore wheels to the EK:

a) Where non original axle or suspension components are fitted, the offset of the wheel in relation to the axle or stub axle assembly used shall not be increased by more than 12.5mm each side of the vehicle based on the specifications of the axle components used.
The original rear axle assembly was sourced from a VP Commodore. VP Commodore offset varied from 26-43mm (positive offset in all cases). The offset of the proposed wheels (26mm) is within the range originally fitted to VP Commodores. The front spindle assemblies were originally from a HR Holden, modified by the Castlemain Rod Shop to suit Commodore bearings. HR Holdens originally had 6mm positive offset. The proposed wheels have 20mm more offset than the original assembly. Rear axle is thus compliant. Front axle is not compliant and requires further discussion with the engineering signatory
b) If an axle assembly is shortened then the track width limit is taken as the axle manufacturers original track dimension, less the amount the assembly has been narrowed, plus 25mm.
The rear axle assembly has been shortened. The original rear axle assembly was sourced from a VP Commodore. VP Commodore offset varied from 26-43mm (positive offset in all cases). The offset of the proposed wheels (26mm) is within the range originally fitted to VP Commodores (i.e. the wheel track is identical to the axle manufacturers original track dimension, less the amount the assembly has been narrowed). Compliant.
c) The maximum permitted rear rim width for a particular vehicle is determined by its unladen weight (10 litres of fuel, no occupants or luggage) in accordance the tables given in Vehicle Standards Information Sheet No.9.
The vehicle was built in 1961, and hence was not built to comply with ADR 24 (prior to 1973 for passenger cars). With a kerb weight of 1183kg, the maximum permitted rear rim width is 204mm (8 inches). The proposed wheels are 152mm (6”). Compliant.
d) Front wheels shall be:
• No wider than the maximum permitted for rear wheels on your vehicle or 204mm (8 inches).
• No narrower than 70% of that fitted to the rear wheels.
• No narrower than a standard wheel fitted to the your vehicle as original equipment.
The proposed 152mm (6”) front wheels are:
• The same size as the maximum permitted for rear wheels on the vehicle.
• Wider than the standard wheels fitted to the vehicle as original equipment (114mm or 4.5”).
Compliant.
e) The wheel rim width must not be less than the minimum width fitted by the vehicle manufacturer for the particular model.
The proposed 152mm (6”) wheels are wider than the standard wheels fitted to the vehicle as original equipment (114mm or 4.5”). Compliant.
f) The wheel and tyre must be contained within the body work or mudguards (including any flares) when the wheels are in the straight ahead position.
The wheels and tyres are contained within the body work when the wheels are in the straight ahead position. Compliant.
g) The wheel and tyre must not foul any part of the body or suspension under all operating conditions.
The wheels and tyres do not foul any part of the body or suspension under all operating conditions. Compliant.
h) All wheels and tyres fitted to an axle must be of the same carcass construction, diameter, offset, width and mounting configuration (except for spare wheels used in an emergency situation).
All wheels and tyres fitted to an axle are of the same carcass construction, diameter, offset, width and mounting configuration. Compliant.
i) The wheel must not prevent the wheel nuts from fully engaging their studs.
All wheel nuts fully engage their studs. Compliant.
j) The wheel rim must not have a circumferential weld other than that which attaches the rim to the wheel centre.
The wheel rim does not have a circumferential weld other than that which attaches the rim to the wheel centre. Compliant.
k) The wheel must be one designed for the particular hub/axle in respect to bolt pitch circle diameter and wheel nut tapers. Wheels with slotted stud holes are not permitted.
The proposed wheels are designed for the proposed Commodore hub/axles in respect to bolt pitch circle diameter (120mm) and wheel nut tapers (60º). The proposed wheels do not have slotted stud holes. Compliant.
l) Speedometer accuracy must be maintained for the selected tyre and rim combination.
Speedometer accuracy will be ensured by changing the transmission gear: http://www.chevymania.com/tech/speedo.htm. Compliant.
m) The fitment of wheel spacers (or adaptors for dual wheel conversions) between the wheel mounting face and the road wheel is not permitted unless fitted as original equipment by the vehicle manufacturer.
Wheel spacers are not fitted. Compliant.

Hope this helps.

Cheers,
Harv (apprentice wheel nut tightener).

[skylineroofing]

My wheels 7 inch wide with worn tires so i can buy a smaller tyre if needed, the xmember is a pat gardner with hq stubs and commo disc, how do 17_7work on drop stubs, thanks for the help too harv. So havr u had trouble with clearances with 15 inch or offset the problem

[Harv]

Tyres are normally not the drama - it's the rims.

The post linked above has most of the history - it's a clearance issue that can generally only be solved by not complying with NSW offset change laws. For 15" Conformadore wheels in NSW, you either
a) use 26P offset wheels and argue the change in front wheel offset with your engineer,
b) use Stinky tie-rod spacers (copyright Stinky Engineering and Motor Trimming ).
c) run illegal spacers and extended wheel studs.

Cheers,
Harv.

[Mick]

is it the pat gardener fabricated front end or a modified HR front end ? as this will make a lot of differance

[skylineroofing]

I have wheels sorted now. 17 /7inch rims and 215/40/17 and pat gardner front end and hd stubs with 290mm vp v8 discs with vr cailpers.in which r the same as vl vn vp v8 calipers.all on 1 1/2 lowered springs. But i reckon i will get another 1" lower yet before scrubbing problems.pat gardner adaptors to suit were only 150 .
All up with new disc adaptors and wheel bearings disc rotors and padshas only cost 400 dollars. Yet to get brake lines.
Heaps cheaper than hoppers kit. TY