sprouts-car
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| posted on 5/10/11 at 04:57 PM |
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Decreasing wheel offset
Afternoon all,
What would the affect of putting a 15 offset wheel on where a 38 offset was originally?
Also what offset does/did a Cortina use?
Thanks,
sprouts
Build blog
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CRAIGR
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| posted on 5/10/11 at 05:04 PM |
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If the wheel width was the same the wheel would stick out 23mm further.
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sprouts-car
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| posted on 5/10/11 at 05:05 PM |
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quote:
Originally posted by CRAIGR
If the wheel width was the same the wheel would stick out 23mm further.
The wheels are the same size but sticking out further isn't a problem, still well under the wings and arches.
Build blog
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Talon Motorsport
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| posted on 5/10/11 at 05:17 PM |
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It might make your spring rates alittle softer due to more leverage, by how much I could'nt tell you of the top of my head.
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big_wasa
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| posted on 5/10/11 at 05:18 PM |
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Cortina should be 18~19mm, same as mk2 escort.
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clairetoo
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| posted on 5/10/11 at 05:26 PM |
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Since the offset is measured from the center line of the rim - wouldnt that mean the opposite ?
As in , the rim would move inwards by 23mm ?
I bought ET 35 offset wheels when I built my Fury (I knew nothing about wheels in those days.....) , and I needed 23mm spacers to get them to fit -
I've since lengthened the front wishbones by 23mm and binned the spacers .
Its cuz I is blond , innit
Claire xx
Will weld for food......
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CRAIGR
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| posted on 5/10/11 at 05:40 PM |
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Live axle Furys look quite happy sitting on rs alloys which are et19 and as you state et35 needed spacers therefore the lower the et (on the same
width wheel ) the further out it will be.
Goodly linky below which would be a good sticky
http://www.1010tires.com/WheelOffsetCalculator.asp
[Edited on 5/10/11 by CRAIGR]
[Edited on 5/10/11 by CRAIGR]
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sprouts-car
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| posted on 5/10/11 at 05:49 PM |
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I didn't realise cortina offset was so low, just assumed it'd be the same as other fords.
That means its only gone from an 18 to a 15 and I'll stop worrying.
Thanks
Build blog
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snapper
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| posted on 5/10/11 at 05:57 PM |
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ET 38 is closer to the car than ET 19
Spring rate is not noticeably affected with this amount of offset change.
Plus ET or just ET means the hub face is further out than the wheel centre line.
Minus ET or -ET means the wheel base is wider and that the hub face is behind the wheel centre line.
The Car Wheel Bible is a good reference and has diagrams.
I eat to survive
I drink to forget
I breath to pi55 my ex wife off (and now my ex partner)
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phelpsa
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| posted on 5/10/11 at 06:21 PM |
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quote:
Originally posted by Talon Motorsport
It might make your spring rates alittle softer due to more leverage, by how much I could'nt tell you of the top of my head.
Very very little. If you have zero dynamic geometry change it would be zero (you'd just see an increase in wishbone loads).
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