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Brypar billet uprights.....so it's happening

* * * * * 1 votes brypar uprights wider wheels

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318 replies to this topic

#41
ian.r

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is that the Mercury Motorsport time attack Gtr from 2011ish?

looks like it will work quite nice
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#42
elf_cruiser

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What offset wheels do people run? We are looking to make sure we have clearance for an 18x13 wheel, although this does depend on the offset.

I'm running 18x11's et23 up front but they do not fit under the factory fender. They stick out roughly 15-20mm, so I think an et40 would be needed to fit them under the stock fender but of course that would interfere with the factory upright.

If you are gaining 2" of clearance to the inside, then I think the best we can hope for is a 12" wide wheel in the front that still fits completely under the stock fender.

Edit: that would be an 18x12 et65 or thereabouts if my math is correct.

Edited by elf_cruiser, 06 February 2017 - 07:55 PM.

2010 GT-R - Matte Gray, AP/Carbotech, BSE trans cooler, BSE tune on ECUTek, H&R sways, AMSOIL, NASA-AZ TT2 and occasional DD
1976 FJ-40 Rock Buggy - tube chassis, LQ4, 700R4, NP205, Rockwells, F&R hydraulic steering, Fox, Ballistic, lots of 4130, 7068, and AR400

2001 Ford Excursion - V10, DD and occasional tow rig

facebook.com/DangerousEnterprises

Do want someday - Radical, 599 GTB w/FHP, 430 Scud, Superlite Coupe, FF Type 65 Coupe


#43
brypar

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So if we aim to fit an 18x13 then, what will that offset be? Just need to model up a wheel. Currently using an 18x11 mockup with 0 offset and plenty of clearance.



#44
7racer

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So if we aim to fit an 18x13 then, what will that offset be? Just need to model up a wheel. Currently using an 18x11 mockup with 0 offset and plenty of clearance.

 

I can't do it like elf in my head.

 

I run 20x11 ET 20 with wide fenders that gives me 10mm outboard.

according to this calculator if I ran 20x13 the ET would be 45 if the face of the wheel would be in the same location

 

http://www.1010tires...set-Calculator#


Edited by 7racer, 06 February 2017 - 08:37 PM.

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In7anity!!


#45
7racer

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In Elf's case. the 18x11 ET 23, to keep the face in the same plane (sticking 15-20mm out), to run the 18x13 would be ET 48


In7anity!!


#46
drewgray

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I run 18x12 +20 all around, but have to run a 20mm spacer up front to clear the upright. I would very much like to not run a spacer.

#47
brypar

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18x13ET48 wont work. Not without relocating critical suspension components. The only way an 18x13 will work is if it's a zero offset wheel. Unfortunately that means a fender extension of some description, probably around 60-70mm. 

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#48
7racer

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Peter can you simulate the 19x13 et 45?


In7anity!!


#49
thehelix112

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Or can you just tell us what the most inboard offset in a 19x13 that will clear is? Based on what you have there in the 18x11 and the new version, seems like you should be able to get a very good guess?

Dave

Edited by thehelix112, 06 February 2017 - 11:08 PM.


#50
elf_cruiser

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I can't do it like elf in my head.

I run 20x11 ET 20 with wide fenders that gives me 10mm outboard.
according to this calculator if I ran 20x13 the ET would be 45 if the face of the wheel would be in the same location

http://www.1010tires...set-Calculator#


Awesome calculator! My math was indeed off by 1/2", so an 18x13 et 65-70 is what we should be aiming for. That would tuck under the fender just barely, depending on camber settings.
I don't think there are any tires being discussed here that wouldn't fit a 13" wheel.

Looking at the drawings a 19" wheel should have more clearance so offset can be higher.

2010 GT-R - Matte Gray, AP/Carbotech, BSE trans cooler, BSE tune on ECUTek, H&R sways, AMSOIL, NASA-AZ TT2 and occasional DD
1976 FJ-40 Rock Buggy - tube chassis, LQ4, 700R4, NP205, Rockwells, F&R hydraulic steering, Fox, Ballistic, lots of 4130, 7068, and AR400

2001 Ford Excursion - V10, DD and occasional tow rig

facebook.com/DangerousEnterprises

Do want someday - Radical, 599 GTB w/FHP, 430 Scud, Superlite Coupe, FF Type 65 Coupe


#51
elf_cruiser

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18x13ET48 wont work. Not without relocating critical suspension components. The only way an 18x13 will work is if it's a zero offset wheel. Unfortunately that means a fender extension of some description, probably around 60-70mm.


Yeah, a 13" is a big ass wheel. What about 18x12 et55 ?
That would still allow a 345 tire up front...

2010 GT-R - Matte Gray, AP/Carbotech, BSE trans cooler, BSE tune on ECUTek, H&R sways, AMSOIL, NASA-AZ TT2 and occasional DD
1976 FJ-40 Rock Buggy - tube chassis, LQ4, 700R4, NP205, Rockwells, F&R hydraulic steering, Fox, Ballistic, lots of 4130, 7068, and AR400

2001 Ford Excursion - V10, DD and occasional tow rig

facebook.com/DangerousEnterprises

Do want someday - Radical, 599 GTB w/FHP, 430 Scud, Superlite Coupe, FF Type 65 Coupe


#52
brypar

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19x13-ET45 definitely a no go. While we can redesign the upright to clear this offset wheel there is very little material left to also clear the coilover. Just running some FEA analysis now with the most extreme we can go which should clear a 19x13-ET30 wheel. Will post comparison images when it's done.



#53
brypar

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The version test fitted yesterday in green. The wheel shown here is 19x13-ET30

Attached Images

  • 18x13-ET30.png
  • green-old-blue-new.png

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#54
thehelix112

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I'm not following something.  That is only gaining 29mm on the inside is it?

 

http://www.willtheyf...h=13&offset2=30

 

"Compared to your existing wheel, this new wheel will have an inner rim which is 29.5mm closer to the suspension strut."

 

So only 1" extra clearance, rather than 2"?

 

It's confusing coz if you look at the green overlay, it looks like with the initial version, it wouldn't've been able to accommodate any more wheel/tyre inboard?

 

Dave


Edited by thehelix112, 07 February 2017 - 01:13 AM.


#55
brypar

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You are right. When we initially designed the upright we were aiming to be able to comfortably fit a 19x12 or 20x12 wheel which is why we increased clearance mainly around the upper part of the upright (see image below of original scan and original design. It's only the last few days we've seen more people wanting to go to a 13" wheel so we are looking to redesign to suit, although as you can see we are limited. I'm not sure fitting a 13" under standard bodywork will be possible unfortunately as there physically isn't enough room without having to redesign a lot of components, so we are working with what we have. As I mentioned earlier a 13" wheel with a 30mm offset will fit. Unfortunately we have to compromise somewhere. If there are enough who are genuinely interested we could look at lower control arm designs and damper pickups to get more room but I would have to think what a kit would cost!

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#56
thehelix112

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Thanks for the reply Peter, that makes sense.  Maybe we end up being able to run a 19x12.5? :)

 

Dave



#57
Dsm_alpha

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Why does anyone need 13"? The 345 will fit on a 12"

#58
7racer

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Why does anyone need 13"? The 345 will fit on a 12"

 

that's a good point,

the Hoosier R7s have a recommended rim width of 12-13

couldn't find anything for the V720 ACR but saw on the Corvette forum where they are tracking it on 12's rims.

 

and like the Helix said, they might actually behave like a 20 tread wear tire!

 

Peter so could you run sims for the 18x12 and 19x12 and for me a 19x12.5?

 

My car has the fenders off, but I remember still having more space outboard with the wide fenders.


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In7anity!!


#59
choerizo

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I'd be happy to just run R888's 315 20" square for street.


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#60
thehelix112

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Why does anyone need 13"? The 345 will fit on a 12"


The 355 Kumho runs on a 13.




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