Rays Volk Racing GT-C Face 2 and "Attachments".

[J4P RX]

Originally posted by Initial-D
Lol!

Glad that\'s sorted then!!

I never quite got the hang of working out the offsets So looked at Imamuras FD spec and thought hmm... they look like nice rims, they fit his car... I\'ll go for whatever he\'s having lol!!:rollin

Yeah it took me ages but I had to get the hang of it cause TNS are the Driftworks Offset Police :rollin

I saw it summed up quite simply though.  The lower the offset the better

Obviously go too low though and it doesnt fit!

[Initial-D]

Yep can be worring looking out the wing mirror to see tyres outside the edges of the car!

Does look best if you can fill out the arches although you gotta watch the rubbing on tight corners and country lanes!

[chrisBoid]

Ben, need your help.

I see that your front would be exactly the same size as mine and the rear is the same apart from the fact that my offset will be +11 and yours is +22.

Do you think +11 will still clear the caliper?  This is my main worry and the only thing holding me back now.

Do you have any close up shots of the rear wheel and caliper clearance?

Cheerz

Chris.

[J4P RX]

The difference between +11 and +22 would be the wheel sitting further out by 11mm.

I cant see how going out would cause any issues clearing the caliper as it should be further away unless Ive got mixed up somewhere along the lines.

Just means you need another 11mm arch clearance but then your going wide arch anyway.

Lee

[Initial-D]

Hi Chris, like Lee said the offset relates to the amount of distance the rim is set off from the hub.

The wheels on the back do have less metal where they are attached to the hub compared to the front, but thats because their +22 and not +18 like the fronts. I\'m picking my car up tonight so I\'ll try to get in their with a ruler and measure the clearance! You won\'t have any probs I\'d of thought looking at the diference between +18 and +22.

[chrisBoid]

Cheers Ben, will look forward to the ruler results

How much do your front and rears stick out over the original arches?

Ta

Chris.

[Initial-D]

Hi Chris, measured them this morning and they\'ve got 26mm between the rear caliper and inside of the rims (spokes closest point to the caliper). So you\'d have no worrys with clearance!

I\'m not entirly sure how much the wheels would stick out of standard arches as I\'d had them rolled and flarred a little before I got the wheels (not enough tho lol!). I would\'ve thought at least 20 - 30mm tho!!:eek:

[chrisBoid]

Cheerz Ben, went  over my calculations again last night, need to confirm what FEED are recommending though (it\'s a bit hard to tell from their site http://www.fujita-eng.com/fd3s/index.html) so I can be sure to get as close to that as possible.

Anyway, here it is so far: -

Edited the image with better wording, see new post.

[J4P RX]

Chris,

I dont understand the part labelled as your setup?  Is that would you would like as I cant imagine rims having offsets of 26.85 and stuff.

The FEED recommendations look a bit weak to me too really, would of thought it would of been lower offsets than that.

Edit: The whole pics confusing me now!  lol, change my mind again with this ill come back to it after lunch.

[chrisBoid]

Yeah, it should have been labelled "my ideal setup" to get as close to FEED\'s recomendations as possible.  In the real world I\'d get +30 for front and +18 for rears.

Hehe, yep it\'s confusing as hell!

[chrisBoid]

Shin (Prospec) is going to chase Rays again and say: -

"This is the wide body kit he has, what rims does he need?"

Hope they cooperate more this time!

[Initial-D]

You\'ll need to swap the outside and inside as you have them the wrong way around.


Translation from Feed says:

Front fenders:
Recommendation wheel offset value + 35 (with main point processing + 24 - + 22) rim width 9.5J

Rear fenders:
One side 20mm wide. Recommendation wheel offset value + 24 - + 0. Rim width 9.5J

So I woulda thought anything between those values would be fine.

[Initial-D]

I woulda said run 18 x 9.5J all round with front offset at +22 and the rears at +0 according to Feed.

Or run 18 x 9J on the front with + 9 (equal to 18 x 9.5J with + 22 offset - but allow more clearance for turning the rims within the arch as I had a little rubbing on full lock with my 18 x 9\'s). Then run 18 x 10J with +13 on the rear (which would be the same as 18 x 9.5J with + 0 offset, but give you half an inch/13mm more grip).

Do you think that seems logical with what you\'ve learnt or have I worked that out completly wrong?? :confused:

Oh.. or you could just wait to hear from Feed...

[chrisBoid]

Ben, I\'m confused you think I have the inside and outside the wrong way around, if I have then I\'ve been doing things mucho wrong! :o

A positive offset means the bolt face is closer to the outside (front) of the rim?
So the higher the offset, the less a wheel will stick out.
The lower the offset, the more a wheel will stick out.

The GTC\'s don\'t come in 9.5 inches

Shin reckons "main point processing" means having to modify \'something\' with an offset between +24 and +22, although that doesn\'t make much sense, why only modify something with those offsets, what about offsets lower than that?

I think your offset calculations are off slightly.  It looks like you are taking the difference in wheel sizes, (e.g. between 9.0 and 9.5 = 0.5 ~ 13mm) and applying that to the offset, where it should only be half that, as the offset works only in one half of the rim, and the extra 13mm would be split between both halves.

9.5" +0 offset = 10.0" -6.5 offset (approx)

Calculation: -

(((10 * 25.4) / 2) - ((9.5 * 25.4) / 2)) = -6.35 offset

That of course assumes I\'m calculating it correctly!

I\'ll wait for Rays to look at what FEED recommends so they can recommend a setup for me, which is what I\'d like them to have done in the first place!  Feels like I\'m going round in circles!

Wish I could speak/read Japanese!

Ta for all your help.

Will keep you informed of progress (if any!)

[chrisBoid]

The aim is to match FEED\'s recomendation as close as possible.
So I need to match the width of the rim that extends from the bolt face. (values in red ).
Because I do not have 9.5" rim sizes available I have to utilise the offset to make up the difference, with lower offset (values in blue ) pushing the rim out.