home register FAQ memberlist calendar

Go Back   Turbobricks Forums > Mechanical > performance & modifications

Closed Thread
 
Thread Tools Display Modes
Old 10-23-2009, 02:19 AM   #1
GrandmaSideways
AW71AW71AW71 AW71AW71AW71
 
Join Date: Dec 2006
Location: Vancouver B.C.
Default Widest rim possible on a coilover equipped 7/9? 18x8.5" too much? Open Discussion.

first of all, I ^think^ this is the right section for this, because let's face it, who doesn't want the widest possible rims? More width means more rubber choices, and wider rubber means better traction. It also doesn't fit into showroom, but it's not really a maintenance thing either...
I picked up a set of 18x8.5" BBS RMII alloys recently... From a jaguar S-Type, 5x108, ET=22mm and 18x8.5" all around. Nice wheels. Have the intent to put them on my 1993 945ti. The 940 has MVP coilovers, and adjustable rear spring perches. I'm wondering how much I'm going to need to roll the fenders to get them to fit, and what series of tire you think would be best... The only person I can recall going wider than 8" is maybe chigga, and he has had the same coilovers I do. Maybe Box Driver...
I'm sorta' confused, mostly because they're sitting just across the border in blaine at a mailbox waiting for me to go grab them. So without them in front of me, I'm trying to get an idea of just how screwed up this plan might be, lol. I know that 8" work okay and require a little more rolling on the 240, but apparently the 7/9 series is a bit more accomadating, I've been told? Any validity to this?
I already figure I'll have to probably pull the plastic fender liners, which is fine. I don't see them playing too nice.
Sticking my head under the car, the 16x7.5" team dynamics seem to have lots of room to breathe even when tucked in... But Volvo wouldn't go wider than 7" on any of it's factory offerings, right? Except for the one Bertone wheel?
Anyway, let the chatter begin, not much to go by, I know, but let's get the ball rolling. Certainly I can't be the first 7/9 series owner to face this conundrum.
Feel free to post photos, experiences, epic failures, epic wins, 240 applications, etc etc...
GrandmaSideways is offline  
Old 10-23-2009, 02:22 AM   #2
Mueller
Board Member
 
Mueller's Avatar
 
Join Date: Oct 2004
Location: Antioch, CA
Default

what is Doug running on the Volvette?

thought the rears are at least that wide if not wider with a stock body...
__________________
.........
Mueller is offline  
Old 10-23-2009, 02:26 AM   #3
GrandmaSideways
AW71AW71AW71 AW71AW71AW71
 
Join Date: Dec 2006
Location: Vancouver B.C.
Default

Quote:
Originally Posted by Mueller View Post
what is Doug running on the Volvette?

thought the rears are at least that wide if not wider with a stock body...
I thought he had minorly tubbed it for some reason. Not sure where I got that idea from though...
I'm off to see his build thread!

Anyway, I invited a few guys for their input, boxdriver, chigga, towery, mueller, and group A... all the guys I could think of off the top of my head...
I mean, it's not really an issue, I was thinking when I grab the four wheels, I can grab four crap blown tires off the rack say from 235/40/18 -215/45/18 and in and there abouts, and just go down from there, and experiment. I got a good deal on the wheels, so it's not like I can't get rid of them if it doesn't work out, in which case it's back to the original plan of 17x7.5" Type A for summer, and some misc. 16" for winter as opposed to the type a in winter BBS in the summer...
GrandmaSideways is offline  
Old 10-23-2009, 02:37 AM   #4
towerymt
the real Towery
 
towerymt's Avatar
 
Join Date: Sep 2002
Location: VA, USA
Default

Get the wheels and test fit them w/o tires.

Should fit OK on the back. Backspacing shouldn't be an issue. Cut/roll the fender lip flat at the top and it may be OK. My only experience with 7/9 series is test fitting 9.5 ET0 on a 744/764, and it looked like there was room. Helped a 940 owner trim the rear lips for 225/45 on Titans and 32mm rear adapters, but it was just a tiny rub on the lip at the 12 o'clock position. Trim most of the lip and then roll/hammer it almost flat and there will be a lot more room.

No idea on the front. Probably needs a 5-8mm spacer, but it may clear the strut tube. Depends where the coilover sleeve & spring seat are located. Increasing wheel diameter allows for higher offset on the front because of the kingpin inclination.

Eamonn bolted 255/40/18 on Pegasus to the rear of his solid axle 764. I didn't look closely to see how well they cleared when we bolted them on quickly, in the dark, at the drag strip in Montgomery. But the car made one pass and it wasn't a tire rub that ended his night.

I wouldn't go smaller than 225/40. Really only leaves one other option, 235/40.
towerymt is offline  
Old 10-23-2009, 02:47 AM   #5
Captain Bondo
Exklusiv Zubehör Klub
 
Captain Bondo's Avatar
 
Join Date: Sep 2002
Default

For an 8.5" I would rather have a lower offset than 22, honestly.On a 240 you would need a spacer up front. I am betting a 7 will also, although they have higher wheel offsets from the factory so maybe not..

You want about et10 on the front for an 8.5" wide rim on a 240.

I'm not sure on the rears but 740's have lots of room back there.

Being that you already bought them the thread is slightly redundant. Just pick them up and put one on.

edit: beaten by Towery. drat.
__________________


-Kenny
(I crushed a 240 with some stuff done to it. Honest.)
Quote:
Originally Posted by Jordan View Post
Turbobricks isn't a car forum any more. Its a forum for lame kids.
Captain Bondo is offline  
Old 10-23-2009, 10:27 AM   #6
Hagar17
Board Member
 
Hagar17's Avatar
 
Join Date: Jun 2005
Location: Victoria BC
Default

I gotta ask because I'm thinking for performance of going smaller rim to save unsprung weight.
(plus tires are much cheaper)
what are your 18's and tires gonna weigh in at?
__________________
Keeping late 80's Swedish metal alive!
Hagar17 is offline  
Old 10-23-2009, 08:25 PM   #7
Nils
Board Member
 
Join Date: Jul 2009
Default

Quote:
Originally Posted by Hagar17 View Post
I gotta ask because I'm thinking for performance of going smaller rim to save unsprung weight.
(plus tires are much cheaper)
what are your 18's and tires gonna weigh in at?
to save unsprung weight the most effective thing would be stock steel wheels and stock tires.
Nils is offline  
Old 10-23-2009, 09:14 PM   #8
Volvo Heretic
Board Member
 
Volvo Heretic's Avatar
 
Join Date: Jan 2007
Location: End of Earth-North Dakota, USA
Default

Quote:
Originally Posted by Nils View Post
to save unsprung weight the most effective thing would be stock steel wheels and stock tires.
That would be so wrong in so many ways.
__________________

72 1800e, (74 B30f, M410, 1031 w/3.31:1, Weld Draglite 10x15/ 12x15, 265/50-15/ 295/50-15 BFGoodrich TA radials)
http://www.youtube.com/watch?v=AKn-LTNa4rc Top Speed Attempt Video
http://www.youtube.com/watch?v=T3qDGChRDDY Weather Report "Nubian Sundance"

Last edited by Volvo Heretic; 10-23-2009 at 09:26 PM..
Volvo Heretic is offline  
Old 10-23-2009, 09:43 PM   #9
towerymt
the real Towery
 
towerymt's Avatar
 
Join Date: Sep 2002
Location: VA, USA
Default

Quote:
Originally Posted by Nils View Post
to save unsprung weight the most effective thing would be stock steel wheels and stock tires.
I could go for Keizer 15x10 and 275/35/15 Hoosier A6/R6 for about 32lbs/corner. My stock steel wheels/tires were always in the 34-36lb range.
towerymt is offline  
Old 10-23-2009, 09:52 PM   #10
Captain Bondo
Exklusiv Zubehör Klub
 
Captain Bondo's Avatar
 
Join Date: Sep 2002
Default

Quote:
Originally Posted by Nils View Post
to save unsprung weight the most effective thing would be stock steel wheels and stock tires.
Ummm.. no. Plenty of one piece forged monoblocs that are bigger and lighter than anything stock. You just have to pay for them.
Captain Bondo is offline  
Old 10-23-2009, 11:16 PM   #11
ZVOLV
<Master Tech>
 
ZVOLV's Avatar
 
Join Date: Nov 2002
Location: California
Default

Too long. Did not read.

But my 225/50 on hydras rub if I drop the front perch down too low. Rollin Cali (raked back) a little right now due to this. Spacer would get me better clearance tho
__________________
No Start Thread
ZVOLV is offline  
Old 10-25-2009, 03:08 AM   #12
stylngle2003
Board Member
 
stylngle2003's Avatar
 
Join Date: Nov 2002
Location: Two Up, Two Down
Default

you will need ~10-12mm in front, and could probably run spacers up to an inch in the rear. but of course, test fitting without tires would be a good first step.
__________________
-Billy
Volvoless for the first time since 1990...
2002 Toyota Avalon XLS (comfy gradma car)
1996 Chevrolet Tahoe LS 2WD (hauls ass)
1990 Mazda Miata (track toy)
stylngle2003 is offline  
Old 10-26-2009, 07:10 PM   #13
GrandmaSideways
AW71AW71AW71 AW71AW71AW71
 
Join Date: Dec 2006
Location: Vancouver B.C.
Default

So at ET22, I'm fine. I have a pair of 12mm spacers from H&R, just need to press in longer studs.
GrandmaSideways is offline  
Old 10-26-2009, 07:26 PM   #14
Nils
Board Member
 
Join Date: Jul 2009
Default

hm... a simple example from the bmw parts catalogue shows a 3.5 lbs difference in weight between a steel 16" rim and an alloy 16" rim...the steel one is 3.5 lbs lighter and uses the same tire.

there's not many normal aftermarket big alloys with fitted tires around that weigh less than tiny narrow stock steel wheels with stock tires.

unless you get some crazy magnesium/forged wheels that cost more than what people paid for their car and would be "throw away cash" on most cars

and ofcourse the stock stuff drives like crap in comparison, but that wasnt the question.
Nils is offline  
Old 10-27-2009, 12:17 AM   #15
stylngle2003
Board Member
 
stylngle2003's Avatar
 
Join Date: Nov 2002
Location: Two Up, Two Down
Default

Nils, what is the width difference for the steel vs alloy wheel? i bet the bmw is an inch wider, or more.
stylngle2003 is offline  
Old 10-27-2009, 02:53 PM   #16
DrvSfly
Bored Clown
 
DrvSfly's Avatar
 
Join Date: Jul 2008
Location: ATL
Default

This thread is boring without pics.
__________________
Drive Safely

Quote:
Originally Posted by Forg View Post
I think we'll either get rid of religion, or it will get rid of us.

'83 245 TIc sold
'97 960 totalled
'94 745 totalled (not mine)
'87 744 totalled (not mine)
'91 780 totalled and sold
'81 b21f, T cam, Lh2.2, 960 injectors, junkyard/back of the shop 15" trash rims. - Sold

DrvSfly is offline  
Old 10-27-2009, 09:52 PM   #17
GrandmaSideways
AW71AW71AW71 AW71AW71AW71
 
Join Date: Dec 2006
Location: Vancouver B.C.
Default

They'll be like this:
GrandmaSideways is offline  
Closed Thread

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On

Forum Jump


All times are GMT -4. The time now is 01:14 AM.

Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2020, vBulletin Solutions Inc.