Author Topic: E-Body Tire Combos  (Read 504416 times)

Offline brooksie

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Re: E-Body Tire Combos
« Reply #1065 on: November 30, 2016 - 01:07:00 am »
I forgot to say, it is a 440 stroked Indy motor. It pushes 612 HP at the motor.




Offline HP2

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Re: E-Body Tire Combos
« Reply #1066 on: November 30, 2016 - 09:42:46 am »
The tire that is on right now and in the picture is a 275 / 50/15. 15" wheel. Not sure but I think the current rim is 4" backspacing.

8" with 4" backspace or 7" with 4" backspace? You already look like you have potential wheel opening interference if you compress the suspension.

275/50r15 = 11.1 sec width x 26.4 diameter.  295/55r15 = 11.9 sec width x 28" dia.  So it will be roughly 1/2" wider on each side and 1" taller all around.  8" with 4.5" backspace will put the  tire 1" closer to the leaf, 1/2" for the rim, 1/2" for the tire. Hows the space to the rear section of the leaf spring 1" further back?

Don't forget that with the stock suspension layout, the springs are wider in the shackle area than they are in the hanger area. You will contact the springs behind the housing before you contact them in front of the housing. I don't see a 10" rim fitting without interference on either side. 5" backspace will put it into the leaf. 4.5" will put it into the wheel opening.
« Last Edit: November 30, 2016 - 09:45:57 am by HP2 »

Offline brooksie

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Re: E-Body Tire Combos
« Reply #1067 on: December 16, 2016 - 11:18:31 am »
The car is in storage right now so I will have to get some measurements . I would like to get the 295 /55/15 Tire on with a 4  1/2 BS . Right now I have a 285/40/18 Tire on with no suspension altered . So the car now sits to high and needs to be lowered if I keep those tires and rims on it . I have decided to go old school with steelies and a cap now and that's why I was just wondering if anyone out there has a 295/55/15 Tire with a 4.5" BS on a stock suspension. I don't want rub issues so I always go what might fit and rub a bit to the next size lower so it never rubs !

Offline djais1801

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Re: E-Body Tire Combos
« Reply #1068 on: January 06, 2017 - 07:56:40 am »
i had done a similar thing with my 71 Satty, black police wheels and rallye center caps.





Wheels came yesterday.

They are for the 69 Fastback G3 Hemi Project car.
It will be 2015 Viper Gunmetal Pearl and the Year One Rallye Wheels Matte Black with Dark Argent 71 Centers.
Plasti-Dipped just to see if we like it.
We Like It!  :2thumbs: :aarg: 
They will be going out for Powder Coat. Keeping the centers just the way they are. The wheels will be All Black, 100% Only masking the mounting surface,



Offline dave73chally

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Re: E-Body Tire Combos
« Reply #1069 on: January 06, 2017 - 01:12:46 pm »
I've thought about doing that with my cop car rims as well as I have rallye caps laying around. You had to drill out the cop car rims to mount the centers correct?
73 Challenger
512 / 4spd / Hotchkis & QA1 Suspension

Offline waskier

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Re: E-Body Tire Combos
« Reply #1070 on: February 09, 2017 - 09:24:42 pm »
70 Barracuda 383 car.  Hotchkis front end with QA1 K.  13" maybe 14" rotors up front.  12" rotors out back.  With the 14" rotors I'll needs 18" wheels.  SO.  Foose 18" F223 Challenger Rallye wheels. 18x10 w/5.5" b.s. with 295/35/18's out back.   18x9 w/5" b.s. with 275/35/18's out front.   DrDiff 1" offset on stock 70 8.75" rear end.   What does everyone think of this?

Offline Aracer

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Re: E-Body Tire Combos
« Reply #1071 on: March 05, 2017 - 02:53:20 am »
Brakes sound A+
What diameter will your front tire be? Will they clear the front wheel opening
What brand/ types of tires will you buy?

Offline 72bluNblu

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Re: E-Body Tire Combos
« Reply #1072 on: March 05, 2017 - 01:08:58 pm »
70 Barracuda 383 car.  Hotchkis front end with QA1 K.  13" maybe 14" rotors up front.  12" rotors out back.  With the 14" rotors I'll needs 18" wheels.  SO.  Foose 18" F223 Challenger Rallye wheels. 18x10 w/5.5" b.s. with 295/35/18's out back.   18x9 w/5" b.s. with 275/35/18's out front.   DrDiff 1" offset on stock 70 8.75" rear end.   What does everyone think of this?

I think you're going to need more backspacing.

In the front it will depend on the brake kit. If the brake kit you use has the same track width as 73+ mopar disks, it will work. But a lot of aftermarket brake kits add track width, and an 18x9 with 5" of backspace will put a set of 275/35/18's at about the minimum clearance you'll need to the fenders. I run 275/40/17's on my Challenger with 17x9's and 5" of backspace, but I've got no extra room to the fenders. I use the later 11.75" mopar disks on that car. So, whatever your brake kit adds to the track width you'll have to add to the backspace in the front to make it work.

In the rear you need more backspacing. 295's will fit, 18x10's will fit, but with an E-body rear axle you'll need more backspace. Again, on my Challenger I run 275/40/17's and 17x9's with 5" of backspace. I also have a 1" spring offset, but I used a B body rear axle. That combination is pretty close to centered in the wheel well with over an inch of clearance to the quarter and the frame. An E-body 8 3/4 is 1.5" wider than my 68-70 B-body 8 3/4, so right there you'd need an extra 3/4" of backspace. Most rear disk kits add the thickness of the rotors to the track width, so, typically a 1/4" or so. So in the back your 18x10's should probably have about 6.5" to 6.75" of backspace to make 295's work. 

Offline dakota

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Re: E-Body Tire Combos
« Reply #1073 on: March 07, 2017 - 05:58:45 am »
I just came across this option on the Jegs website for viewing different size tire and rim combinations.   For E Bodies, it only has a Challenger option and only for 1971.   There's also an option for some different body colors.    Even though it's a bit limited, I thought it was a good tool for scanning through a bunch of options quickly.


http://www.jegs.com/wheels/wheelconfig.html#!lang=0
« Last Edit: March 07, 2017 - 06:12:43 am by dakota »

Offline dakota

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Re: E-Body Tire Combos
« Reply #1074 on: March 18, 2017 - 05:57:06 am »
I've seen a number of references in this thread to using the Dr Diff spring relocation brackets to make more room for wider wheels in the rear.   It's not mentioned in the threads, but I'm assuming the spring perches have to be moved inboard to use these relocation brackets, correct?   I have a stock E Body 8 3/4" axle on my Challenger.   I know there's also an option to go with one of the narrower B Body axles to allow for wider tires and rims but at the moment it's not something I want to take on.
« Last Edit: March 18, 2017 - 06:44:07 am by dakota »

Offline brads70

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Re: E-Body Tire Combos
« Reply #1075 on: March 18, 2017 - 10:31:50 am »
I've seen a number of references in this thread to using the Dr Diff spring relocation brackets to make more room for wider wheels in the rear.   It's not mentioned in the threads, but I'm assuming the spring perches have to be moved inboard to use these relocation brackets, correct?   I have a stock E Body 8 3/4" axle on my Challenger.   I know there's also an option to go with one of the narrower B Body axles to allow for wider tires and rims but at the moment it's not something I want to take on.


Yes, The kit comes with both the offset hangers and shackles. The B-body rear end housing is then a bolt in and allows the more readily available 5" backspace on a 10" wide rim.

 http://www.doctordiff.com/e-body-offset-spring-hanger-shackle-kit.html
Brad
1970 Challenger 451stroker/4L60 auto OD
Barrie,Ontario,Canada
Proud to own one of the best cars ever made!!!!!

My restoration thread 
http://www.cuda-challenger.com/cc/index.php?topic=59072.0
 My handling upgrade post
http://www.cuda-challenger.com/cc/index.php?topic=73985.0

Offline HP2

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Re: E-Body Tire Combos
« Reply #1076 on: March 18, 2017 - 10:47:39 am »
If you retain the E body rear, then yes, you need to move the spring perchs over as well. You can still fit as wide a tire as using the B body rear, but it will require more offset.

Offline dakota

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Re: E-Body Tire Combos
« Reply #1077 on: March 18, 2017 - 12:17:13 pm »
Thanks for the quick replies guys. This is one of those "next time, I'd do it different" things since I already have the stock axle cleaned and painted, new seals installed, cleaned up the studs for the backing plate and have new bearings pressed onto the axles.  I found some B body axles a couple of hours from here on Craigslist, so now I'm debating again.  I'm trying hard to get the wheel and tire purchase "right" the first time so I only do it once.  Based on what I've read on this thread, there always seems to be an eye pointed towards an upgrade in the future.  I'm pretty sure I've spent more time thinking about wheel and tire combos than anything else we on my car. 
« Last Edit: March 19, 2017 - 06:11:12 am by dakota »

Offline dakota

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Re: E-Body Tire Combos
« Reply #1078 on: March 19, 2017 - 08:25:36 am »
I think I'm pretty well settled (FINALLY!) on the tire and rim size for my 70 Challenger.   The car has a stock E body rear axle.   When purchased, the car had 245/60/14's on stock Rallye 14x7 rims all around, a 14" spare, and power drums on all 4 corners. The front control arms and rear leaf spring are staying stock.  The "pretty well" qualifier is added because they're still a couple of questions below about how these choices might limit future upgrades.   I'm keeping the rear drum brakes (11X3) for now and have changed the front to disc with a basic kit from Right Stuff.  While I like having the look of the 17" front / 18" rear, the practical side of me has the choice heading towards using the 17X9 wheels with 5" backspace and 275/40/17  tires on all 4 corners that 72bluonblu is using.   I like the ability to rotate the tires around all 4 locations to keep tire wear relatively even, and in a pinch can put the existing spare to work (flat front tire means moving a rear tire to the flat location, then the 14" spare goes on the rear).  If I've done the math right, the 275s will be just a little taller than the 245s on the car now (25.7" versus 25.4"). 

So here are the questions assuming that the 275/40/17s on 17x9s with 5" bs are on the car, keeping in mind that I'd like to avoid having to roll or trim any fenders or remove any internal bracing: 

1.  Will using 275/40/17s with 17x9s on the front limit my option to use 2" drop spindles at some point in the future? 

2.  Along the same lines, would there be any fitment issue with dropping the rear axle an inch with blocks if that's something that interests me later? 

3.  Will there be enough space on the back to upgrade the drums to disc brakes if that's in the future?

BTW, thanks to all the folks that have been posting their wheel/tire info on this thread.   It's a lot to read through, but all of the info minimizes the risk of an "oh shXt" moment later for those of us going through this for the first time.

The decision about buying American Racing Torq Thrust II or Cragar S/S wheels will come later.

 



Offline 72bluNblu

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Re: E-Body Tire Combos
« Reply #1079 on: March 20, 2017 - 03:02:33 am »
I think I'm pretty well settled (FINALLY!) on the tire and rim size for my 70 Challenger.   The car has a stock E body rear axle.   When purchased, the car had 245/60/14's on stock Rallye 14x7 rims all around, a 14" spare, and power drums on all 4 corners. The front control arms and rear leaf spring are staying stock.  The "pretty well" qualifier is added because they're still a couple of questions below about how these choices might limit future upgrades.   I'm keeping the rear drum brakes (11X3) for now and have changed the front to disc with a basic kit from Right Stuff.  While I like having the look of the 17" front / 18" rear, the practical side of me has the choice heading towards using the 17X9 wheels with 5" backspace and 275/40/17  tires on all 4 corners that 72bluonblu is using.   I like the ability to rotate the tires around all 4 locations to keep tire wear relatively even, and in a pinch can put the existing spare to work (flat front tire means moving a rear tire to the flat location, then the 14" spare goes on the rear).  If I've done the math right, the 275s will be just a little taller than the 245s on the car now (25.7" versus 25.4"). 

So here are the questions assuming that the 275/40/17s on 17x9s with 5" bs are on the car, keeping in mind that I'd like to avoid having to roll or trim any fenders or remove any internal bracing: 

1.  Will using 275/40/17s with 17x9s on the front limit my option to use 2" drop spindles at some point in the future? 

2.  Along the same lines, would there be any fitment issue with dropping the rear axle an inch with blocks if that's something that interests me later? 

3.  Will there be enough space on the back to upgrade the drums to disc brakes if that's in the future?

BTW, thanks to all the folks that have been posting their wheel/tire info on this thread.   It's a lot to read through, but all of the info minimizes the risk of an "oh shXt" moment later for those of us going through this for the first time.

The decision about buying American Racing Torq Thrust II or Cragar S/S wheels will come later.

 




1. No, I ran 2" drop spindles briefly with my 17x9's. BUT, you don't need drop spindles. If you increase the diameter of the torsion bars enough you can lower the car more than is practical to drive on the street. All you have to do is match the amount of travel the torsion bars use to the amount of travel available at a given ride height. The larger the torsion bar, the less travel that is needed. With the 1.12" torsion bars on my Challenger I was able to lower the car with the torsion bar adjusters to the point that it was just as low as it was with the 2" drop spindles. I actually raised the car up a 1/4" from where I had it because I got tired of dragging things on speed bumps and driveways. Drop spindles cost more money than torsion bars, for the price of most of them now you can get larger torsion bars and good shocks to go with them. Not only will the car "look cool" with the lower stance, it will actually handle better too. The suspension geometry is better without the drop spindles as well.

-also, you mentioned you're running Right Stuff brakes up front. The 17x9 with 5" of backspace is figured for the 73+ Mopar disks. Different brake kits can change the track width, and I don't know what the Right Stuff brakes do as far as changing the track. The Right Stuff brakes appear to just be aftermarket supplied Mopar disks, but I could be wrong on that.

2. Shouldn't be, assuming that your backspacing is correct and the 275's are centered in the wheel wells. The 17x9" with 5" of backspacing should be close with the stock E-body rear and stock spring locations, but remember that I actually run a 68-70 B-body rear and a 1" spring offset. I have a TON of extra room. I know that 275's will fit on cars with the stock rear and spring locations, but, what I'm saying is measure your car to make sure that backspace will work for you. It should be pretty close, but all these cars are a little different and if you're making it that tight the body tolerances matter. If you do the 1" spring offset you'll want more backspace than 5" with the E-body rear to take advantage of the extra space inboard.

3. Depends on how your backspacing works out. Disks usually add a 1/4" to 5/16" per side, so, you'll need that much "extra" room to the quarter. If your goal is not to buy new rims when you upgrade you'll want to set your backspacing to put your wheels as close the springs as possible with the drum set up, otherwise you might not have the extra room.