Hammerhead
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| posted on 7/2/06 at 01:56 PM |
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Redrilling hubs for different PCD
Does anyone know of any reason why I shouldn't have my sierra hubs redrilled to accept a different PCD to the ford one?
I have got some Lotus 340R alloys and I am desperate to use them as opposed to buying some new ones.
I know a good engineering workshop who sould be able to do the work no problem.
So anyone out there done this before?
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dave1888
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| posted on 7/2/06 at 02:06 PM |
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Dont see any reason why not although it might be an idea to get the old holes welded up.
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k33ts
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| posted on 7/2/06 at 02:29 PM |
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you can buy adapters for changing the pcd they bolt onto your hubs then bolt your wheels to them
drilling your hubs will be alot cheaper and easier though
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Hammerhead
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| posted on 7/2/06 at 02:48 PM |
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Dave, I read that welding the old holes up will make the hubs brittle. The application of heat changes the characteristics of the iron.......unless
you guys know otherwise?????
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Bluemoon
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| posted on 7/2/06 at 03:21 PM |
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I don't see why you should'nt do this (but I'm no expert...). The only thing I think you need to worry about is if the PCD is much
larger than the ford one you might not have enough metal... I would'nt be to worryed about leaving the old spare holes, as long as they are a
long way from the new ones.
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phelpsa
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| posted on 7/2/06 at 03:46 PM |
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The PCD is smaller so there shouldnt be much problem apart from maybe the centre-bore.
Adam
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tul214
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| posted on 7/2/06 at 03:58 PM |
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This is a common practice on the Tiger super six's. The front uprights are Golf mk1 so the rear drums on the Cortina axle are drilled to 100pcd
to match the fronts. On mine the ford holes are still there but they obviously can only be seen when the wheel is off.
1.6 Raw Super6 sold
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Nick Skidmore
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| posted on 7/2/06 at 04:36 PM |
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One thing to double check is that the drive flange isn't locally 'thickened' where the wheel studs press in. You may not have the
extra thickness at your new stud posn.
Also some flanges are locally hardedned around the stud holes so the locating splines dont give up during tightening up of the wheel nuts.
I only know this as I tried to do some mods to a Mini drive flange in the dim and distant.
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Hammerhead
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| posted on 7/2/06 at 04:36 PM |
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sounds good so far!!
The centres will have to be reduced, which should be ok on the engineers lathe. I guess I will have to have the brake discs redrilled aswell. but the
centre bore will be larger......maybe a spacer to fill the gap would help here.
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SteveH
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| posted on 7/2/06 at 10:36 PM |
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Is the offset the same on the Lotus 340R alloys as the Sierra ... you might need to use spacers.
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Hellfire
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| posted on 7/2/06 at 11:04 PM |
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Might be a daft idea but couldn't you drill the wheels to the correct PCD?
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Hammerhead
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| posted on 8/2/06 at 07:23 AM |
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SteveH - I will have to check the offset, but I think its at 38 (Sierras 38 also??)
Hellfire - Not a bad idea, as the nuts are hidden behind a cover on the rims. However the wheels are cast with strengthening ribs where the nuts live,
so I reckon the wheel would be weakened if it was redrilled.
It all seems a big hassle to do this but the cost saving will be good (the wheels were given to me) and they are limited edition (340 sets made)
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