Drag Racing Tech
Sponsored by:
Sponsored by:

Miinitubs and narrowed rear, what backspace wheel to run

Thread Tools
 
Search this Thread
 
Old 07-25-2016, 03:54 PM
  #1  
TECH Resident
Thread Starter
iTrader: (3)
 
25thhawk's Avatar
 
Join Date: Jul 2003
Posts: 813
Likes: 0
Received 1 Like on 1 Post

Default Miinitubs and narrowed rear, what backspace wheel to run

I just purchased a narrowed rear, 3" per side and plan to minitub the car, 99 camaro. I already have offset lca's. I'm wondering what backspace wheel to run, 15x10's with a 325/50 tire. Thanks
Old 07-25-2016, 08:35 PM
  #2  
Staging Lane
iTrader: (1)
 
z28a4's Avatar
 
Join Date: Mar 2010
Posts: 83
Received 1 Like on 1 Post

Default

This is what I want to do when I buy an axle as well, narrowed 3" per side, but I only want to run a 275. From my measuring and thinking, with a 3" narrower axle and a 10" wheel, 5.5" of backspacing will let you suck the wheel and tire combo in 1" from stock allowing you to slightly tuck the tire up into the well. Not sure with a 325 but since your minitubbing, you could possibly achieve the same.

If I'm wrong and someone else has tried this, let me know please.

Rob
Old 07-26-2016, 07:27 PM
  #3  
TECH Resident
Thread Starter
iTrader: (3)
 
25thhawk's Avatar
 
Join Date: Jul 2003
Posts: 813
Likes: 0
Received 1 Like on 1 Post

Default

That is exactly what I was thinking, but not sure if the extra inch of backspace will cause the rim/tire to hit the lca or lca mount
Old 07-27-2016, 12:27 PM
  #4  
TECH Fanatic
 
TTur1996's Avatar
 
Join Date: Mar 2014
Posts: 1,268
Received 162 Likes on 120 Posts
Default

We have 5.5 inches of backspace. All we did was cut out the bump stops and put a flat plate across there. We have the offset lca's , and our axle was shortened 3" per side too. As you can see we could have went to a 6 inch back space. The only problem was the rims we chose didn't come in 6 inch. 6.5. was the next size. It looks like you might be able to get away wit 6.5 but we didn't want to chance it. IMO 6 would have been perfect. Hope this helps. Best of Luck.
Attached Thumbnails Miinitubs and narrowed rear, what backspace wheel to run-img_20141223_052312_775.jpg   Miinitubs and narrowed rear, what backspace wheel to run-img_20141223_052019_018.jpg   Miinitubs and narrowed rear, what backspace wheel to run-img_20141223_051728_594.jpg   Miinitubs and narrowed rear, what backspace wheel to run-img_20141223_051608_028.jpg  
Old 07-27-2016, 08:35 PM
  #5  
TECH Resident
Thread Starter
iTrader: (3)
 
25thhawk's Avatar
 
Join Date: Jul 2003
Posts: 813
Likes: 0
Received 1 Like on 1 Post

Default

Thanks for the pictures. I really expected the wheels to tuck in further with a 5.5 backspace
Old 07-28-2016, 01:42 PM
  #6  
TECH Fanatic
 
TTur1996's Avatar
 
Join Date: Mar 2014
Posts: 1,268
Received 162 Likes on 120 Posts
Default

I was pretty surprised too. We were hoping we could have gotten away with 4.5" backspace to get a little more dish to the rim. I'm not sure what rear end you have, but a friend tried our rims on his nine inch with 4 piston wildwood calipers. And the rims hit the calipers. He had 4.5's and they cleared. We have a S60 with strange calipers and they fit fine. Might be apples to oranges but it could be something to check into. Also, I forgot to mention. You either have to BFH, or cut and reweld the front, lower, inner part of the fender well. You will see what I mean when you go to put the tires on. We didn't roll the fender lip. We just took a flap wheel and sanded the edge, to the inner fender, where you see it. The fender is just as ridged as it was.

Last edited by TTur1996; 07-28-2016 at 01:48 PM.
Old 07-28-2016, 08:03 PM
  #7  
TECH Resident
Thread Starter
iTrader: (3)
 
25thhawk's Avatar
 
Join Date: Jul 2003
Posts: 813
Likes: 0
Received 1 Like on 1 Post

Default

Since I'm minitubbing it, I'm not too worried with how they fit the stock wheel well, but I appreciate the heads up. Do you have any idea how wide your rear is from flange to flange? I'm running stock brakes, so I think I am ok with clearance on them
Old 07-29-2016, 11:43 AM
  #8  
10 Second Club
iTrader: (41)
 
StangEaterSS's Avatar
 
Join Date: Mar 2003
Location: Rockford, IL
Posts: 752
Likes: 0
Received 5 Likes on 5 Posts

Default

I thought the standard was to narrow the rear 3" per side shorter than stock then do 4.5" back space wheels. I could be wrong but I think that's what everyone does on 28x10.5's with a 10" rim.
Old 07-29-2016, 12:40 PM
  #9  
TECH Resident
Thread Starter
iTrader: (3)
 
25thhawk's Avatar
 
Join Date: Jul 2003
Posts: 813
Likes: 0
Received 1 Like on 1 Post

Default

yes, you are correct, but i was hoping to be able to tuck the tire in further with because I was minitubbing it
Old 07-31-2016, 08:42 AM
  #10  
TECH Apprentice
iTrader: (1)
 
The Cartel's Avatar
 
Join Date: Feb 2004
Location: The 918!!
Posts: 305
Likes: 0
Received 3 Likes on 3 Posts

Default

Is the Wolfe kit still the way to go when minitubbing? Anyone done a write up? I plan on doing this during the winter. I just want the factory interior plastic to fit over the tubs tho.
Old 07-31-2016, 01:03 PM
  #11  
Race your car!
iTrader: (50)
 
JL ws-6's Avatar
 
Join Date: Mar 2004
Posts: 15,420
Likes: 0
Received 18 Likes on 18 Posts

Default

Factory plastic isn't fitting over any mini tub that will let you tuck the tire in with a fully offset control arm, you'll have to trim them and ditch the rear seat.

A 5 inch backspace wheel with a 3 inch narrow works out about perfect.

If you want to go extreme like I did and are willing to notch the frame and support it with the cage structure.... You can narrow the rear 6 inches per side and run a 15x12'wheel with a 4 inch backspace.
Old 07-31-2016, 02:39 PM
  #12  
TECH Resident
Thread Starter
iTrader: (3)
 
25thhawk's Avatar
 
Join Date: Jul 2003
Posts: 813
Likes: 0
Received 1 Like on 1 Post

Default

Just doiing some quick measuring and not really seeing where the problem lies. I bolted up my 15x10 with 7.5 backspace with 275/50/15 et street radials on them, using a 1 inch spacer and it clears all the suspension points on the rear and lca's. The rear isnt in the car you so Im sure it will hit parts of the wheel well. But I can't see if i went with a 5.5 backspace giveing everything an inch more clearance, why it wouldn't work.

ttur1996- any chance you could measure the width of your rear? maybe it isn't the same as mine, idk
Old 08-01-2016, 09:54 AM
  #13  
TECH Fanatic
 
TTur1996's Avatar
 
Join Date: Mar 2014
Posts: 1,268
Received 162 Likes on 120 Posts
Default

Sorry man, haven't been on in a few days. My rear end measures 60.5" flange to flange.
Old 08-01-2016, 10:15 AM
  #14  
TECH Fanatic
 
TTur1996's Avatar
 
Join Date: Mar 2014
Posts: 1,268
Received 162 Likes on 120 Posts
Default

If I remember correctly, the reason we didn't go 6.5", is the front, lower, inside wheel well would need to be reconfigured, by the lca front mounting point.. I think 6" was doable, just trimming and rewelding. Because we had to a little with 5.5" backspace. I'm not sure if you could get away with 6.5". On our car, you can see positively that a 4.5" back space on a 10" rim, would not have fit. I can't remember what the reasoning was, but when we ordered our S60 from Strange, they said that was as short as they could go on an F-body with stock mount locations.
Old 08-01-2016, 08:05 PM
  #15  
TECH Resident
Thread Starter
iTrader: (3)
 
25thhawk's Avatar
 
Join Date: Jul 2003
Posts: 813
Likes: 0
Received 1 Like on 1 Post

Default

I'm not 100% sure, but I think that is only 2" narrower per side. I think my stock 10 bolt was 64.5"
Old 08-02-2016, 01:53 PM
  #16  
TECH Fanatic
 
TTur1996's Avatar
 
Join Date: Mar 2014
Posts: 1,268
Received 162 Likes on 120 Posts
Default

Your right, my bad. I just called Strange and they said they could only shorten the S60 2.25" per side but suggested only 2" per side. So that's what we got apparently. They said they would shorten it as much as they could when we ordered it. I was always under the impression that it was shortened 3" per side, like I asked for. Sorry about that. I guess we never measured the old ten bolt. Was just pumped to get the S60 and never paid any attention. No wonder why we couldn't do a 4.5" backspace. Lol
Old 08-02-2016, 06:08 PM
  #17  
TECH Regular
iTrader: (18)
 
droksformula's Avatar
 
Join Date: Mar 2006
Location: tampa bay area
Posts: 494
Received 0 Likes on 0 Posts

Default

Originally Posted by JL ws-6
Factory plastic isn't fitting over any mini tub that will let you tuck the tire in with a fully offset control arm, you'll have to trim them and ditch the rear seat.

A 5 inch backspace wheel with a 3 inch narrow works out about perfect.

If you want to go extreme like I did and are willing to notch the frame and support it with the cage structure.... You can narrow the rear 6 inches per side and run a 15x12'wheel with a 4 inch backspace.
You Gota learn how to get creative man, I did the Wolfe tub kit, took the steel backing out of the seat back and stuck it back and carpeted the tubs with trimmed factory sail panels over it. Won't even notice it unless I tell you it has it.
Old 08-02-2016, 06:11 PM
  #18  
TECH Regular
iTrader: (18)
 
droksformula's Avatar
 
Join Date: Mar 2006
Location: tampa bay area
Posts: 494
Received 0 Likes on 0 Posts

Default

Originally Posted by TTur1996
Your right, my bad. I just called Strange and they said they could only shorten the S60 2.25" per side but suggested only 2" per side. So that's what we got apparently. They said they would shorten it as much as they could when we ordered it. I was always under the impression that it was shortened 3" per side, like I asked for. Sorry about that. I guess we never measured the old ten bolt. Was just pumped to get the S60 and never paid any attention. No wonder why we couldn't do a 4.5" backspace. Lol
The same thing happened to me, but I have 3pc bogarts so I just replaced the shell.
Old 08-02-2016, 06:30 PM
  #19  
TECH Resident
Thread Starter
iTrader: (3)
 
25thhawk's Avatar
 
Join Date: Jul 2003
Posts: 813
Likes: 0
Received 1 Like on 1 Post

Default

I just ordered 5.5" 15x10's. So we will see how it goes
Old 08-02-2016, 11:46 PM
  #20  
Race your car!
iTrader: (50)
 
JL ws-6's Avatar
 
Join Date: Mar 2004
Posts: 15,420
Likes: 0
Received 18 Likes on 18 Posts

Default

Originally Posted by droksformula
You Gota learn how to get creative man, I did the Wolfe tub kit, took the steel backing out of the seat back and stuck it back and carpeted the tubs with trimmed factory sail panels over it. Won't even notice it unless I tell you it has it.
If you make enough room to put a 14 inch carcass width tire in you will have the control arm moved inwards about 2.5 inches from stock location and the frame rails will be about 1/4 inch wide at the thinnest point.


Look at the stock shock mounting position.... We cut in past that point.

Without he 25.3 structure in the car and the shocks, lca and anti roll bar being mounted to the cage, and the cage essentially being the rear frame what I did would be about impossible.


Quick Reply: Miinitubs and narrowed rear, what backspace wheel to run



All times are GMT -5. The time now is 06:50 PM.