ALEXARAS
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| posted on 25/2/08 at 10:22 PM |
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13" OFFSET HELP & Willwood Powerlites
Another question..
I finally decided on 13" based on your advices (thank you Crazy Eddie).
I don't like the looks of the CSRs so i am probaly going for the Image wheels (custom ones). I am thinking to go for the BMRs or 93P
I am not sure though how wide i should get them and what offset should they be.
Some characteristics might be of help here are:
My car is Locost by book (using Escort rs2000 running gear and wheels)
I am upgrading to Willwoods M16.
I need to have wider rear wheels not only for the looks but because Greek roads need wider rear tyres even with a Matiz .
I was thinking for:
6.5 and 7.5
or 7s and 8s
What would you recommend?
The offset is the biggest issue I am facing now as i really don't have a clue.
Thnak you,
Alex
[Edited on 26/2/08 by ALEXARAS]
Locost 7 RS2000
Beach Buggy Rotary
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rayward
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| posted on 25/2/08 at 10:35 PM |
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a book chassis with escort axle normally needs 6" wide ET 19 on the back to allow the rims to clear the trailing arms
so if you wanted to use 7.5" on the rear the wheel would need to move outwards by 1.5" , not sure what offset that is, but may be hard to
find
hth
Ray
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Humbug
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| posted on 25/2/08 at 10:46 PM |
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quote:
Originally posted by rayward
a book chassis with escort axle normally needs 6" wide ET 19 on the back to allow the rims to clear the trailing arms
so if you wanted to use 7.5" on the rear the wheel would need to move outwards by 1.5" , not sure what offset that is, but may be hard to
find
hth
Ray
I think that means you want to move 1.5"=38mm from +19mm ET, i.e. end up with -19ET
I think that's right according to this
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Chippy
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| posted on 25/2/08 at 11:34 PM |
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6" wheel has centre at 3", with 19mm ET. 7.5" wheel has centre at 3-3/4", which is roughly 21mm more than the 6". I
would think that you would require a wheel with an ET of zero, (thats if my maths are correct),  , which would be 2mm inset, should be able to get
away with that. HTH Ray
To make a car go faster, just add lightness. Colin Chapman - OR - fit a bigger engine. Chippy
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ALEXARAS
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| posted on 25/2/08 at 11:40 PM |
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Thank you for your quick replies !!
I think i got it now.
So if I am doing the maths correctly:
Since: 6J --> Et19, then:
6.5J Et 6
7.0J Et -6
7.5J Et-19
8.0J Et-32
Right? I think it is more sensible to go for 7.5 in the back in this case as it will be possible to fit either 205s or 225s.
The remaining is to decide whether to go for the front 6.5J or 7J. Probably going on 6.5J I can use either 185s or 205s right?
In case we decide on the 6.5J with Et6 for front I should not have any problems with fitting the Willwood M16 kit right? Or should I allow some
clearence? (Would they fit the Genuine RS2000wheels anyways?)
Final question for general knowldege. In case one decreases the offest from
6.5J Et6 to ie 6.5J Et-6
What are the advantages and disadvantages concerning both the handling and the wear of the suspension.
If I am becoming a pain let me know.. 
[Edited on 25/2/08 by ALEXARAS]
[Edited on 26/2/08 by ALEXARAS]
Locost 7 RS2000
Beach Buggy Rotary
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ALEXARAS
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| posted on 26/2/08 at 01:04 AM |
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Ehhhhmmm mate i think we are both wrong. It is the wrong way to calculate it i think.
Might be:
6.5J Et 19
7.0J Et 12
7.5J Et 6
8.0J Et 0
Any experts here?
quote:
Originally posted by Humbug
quote:
Originally posted by rayward
a book chassis with escort axle normally needs 6" wide ET 19 on the back to allow the rims to clear the trailing arms
so if you wanted to use 7.5" on the rear the wheel would need to move outwards by 1.5" , not sure what offset that is, but may be hard to
find
hth
Ray
I think that means you want to move 1.5"=38mm from +19mm ET, i.e. end up with -19ET
I think that's right according to this
Locost 7 RS2000
Beach Buggy Rotary
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MikeRJ
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| posted on 26/2/08 at 09:41 AM |
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quote:
Originally posted by Chippy
6" wheel has centre at 3", with 19mm ET. 7.5" wheel has centre at 3-3/4", which is roughly 21mm more than the 6". I
would think that you would require a wheel with an ET of zero, (thats if my maths are correct), , which would be 2mm inset, should be able to get
away with that. HTH Ray
Yep, I make it the same. Zero or a very small negative offset is needed.
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