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Re: 315 Square setup E-body `Cuda [Re: UCUDANT] #2422211
12/22/17 04:59 AM
12/22/17 04:59 AM
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Posts: 2,379
NorCal
RylisPro Offline OP
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Sorry, most of my pictures are held hostage by Photobucket so blame them if you can't see.

I am going to have to retract my previous statement of possibly fitting 335's in the rear. My setup is actually rubbing in the upper wheel wells upon further inspection. It must be rubbing due to the body roll while cornering. The rubbing is just slight on the tire but, is no way ideal.

315's are definitely attainable, no doubt. With leaf springs, one will have to relocate them inboard 1.5" using Dr. Diff's kit and roll the rear fenders. Once those two things are done its just a matter of finding the correct offset wheels.
I am having more issues fitting them in the rear than in the front haha!


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Re: 315 Square setup E-body `Cuda [Re: RylisPro] #2422247
12/22/17 10:57 AM
12/22/17 10:57 AM
Joined: Jul 2005
Posts: 124
Colorado
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MoparCar Offline
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Colorado
Unfortunately Dr. Diff I believe quit making the 1.5" offset kits according to correspondence about a half a year ago.

Wes

Re: 315 Square setup E-body `Cuda [Re: MoparCar] #2422395
12/22/17 06:24 PM
12/22/17 06:24 PM
Joined: Jun 2007
Posts: 2,379
NorCal
RylisPro Offline OP
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I just called Cass and the reasons he stopped making them were because too many people complained that they interfere with a full length exhaust and that they will leave two small dimples on the `Cuda rear valance.

That's too bad, it was a nice product. If enough people ask him nicely though...


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Re: 315 Square setup E-body `Cuda [Re: RylisPro] #2425662
12/30/17 04:40 AM
12/30/17 04:40 AM
Joined: Jun 2007
Posts: 2,379
NorCal
RylisPro Offline OP
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Here is the damage from the 315 rubbing in the rear, minimal but not at all ideal.


Some rear fender rolling progress

Eastwood says their roller does not work with thick double wall rear fender sheet metal of most muscle cars but that is all baloney, it works fine, just need a big F'ing hammer also.



Before shot from a while back

This mod is not too bad since I don't have nice paint. Believe me I wasn't gentle on these fenders at all as they are not that easy to fold up. A few whacks of a big hammer does the trick to bend the metal up, then I used the roller fender to get the shape I want. I took my time as didn't want the rear fender to concave in permanently as it would flex when rolling at a certain spot.

Not too bad as I have never rolled fenders before. I still have to do the driver side and I think it adds about an extra inch of clearance. I'll post up actual measurements of before and after at a later time.
My spine is still killing me due to being crouched down under the fender all day haha!


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Re: 315 Square setup E-body `Cuda [Re: RylisPro] #2425727
12/30/17 12:29 PM
12/30/17 12:29 PM
Joined: Sep 2003
Posts: 10,791
north of coder
moparx Offline
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north of coder
Originally Posted By RylisPro

My spine is still killing me due to being crouched down under the fender all day haha!

just wait until a year or 40 passes, then come back and report how your aches feel ! biggrin only a tad of experience talking here.......
beer

Re: 315 Square setup E-body `Cuda [Re: RylisPro] #2427570
01/02/18 02:40 AM
01/02/18 02:40 AM
Joined: Jan 2010
Posts: 1,102
NW Chicago suburban area
Mopar Mitch Offline
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Rylis -- nice work!! Mine are flushed/pulled... still appears stock...


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Re: 315 Square setup E-body `Cuda [Re: RylisPro] #2439146
01/22/18 06:59 PM
01/22/18 06:59 PM
Joined: Jun 2007
Posts: 2,379
NorCal
RylisPro Offline OP
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I finished the driver side and took before and after pics:
Before

After

Added about 5/8" additional clearance

My advice when rolling the fenders is to take your time and check your work. I got a bit too greedy and the fender concaved in a bit. I had to pop it out from the inside and everything looks great now.


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Re: 315 Square setup E-body `Cuda [Re: RylisPro] #2567697
10/22/18 09:49 AM
10/22/18 09:49 AM
Joined: Aug 2012
Posts: 41
raleigh, NC
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mcmopar1 Offline
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raleigh, NC
Why not use a mini tub and relocate the springs into the frame rails? US Cartool has a “kit” for it.

Re: 315 Square setup E-body `Cuda [Re: mcmopar1] #2568518
10/23/18 07:12 PM
10/23/18 07:12 PM
Joined: Jun 2007
Posts: 2,379
NorCal
RylisPro Offline OP
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Because that would mean more time that the car is down and getting worked on again
which means less time on the road course

Thanks!


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Re: 315 Square setup E-body `Cuda [Re: RylisPro] #2568684
10/24/18 12:50 AM
10/24/18 12:50 AM
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Posts: 41
raleigh, NC
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mcmopar1 Offline
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raleigh, NC
Right, I get it! Would it adversely affect handling?

Re: 315 Square setup E-body `Cuda [Re: mcmopar1] #2568691
10/24/18 01:12 AM
10/24/18 01:12 AM
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Posts: 2,379
NorCal
RylisPro Offline OP
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Yes it would definitely would affect handling if one were to add mini tubs. If we did that we would also fit the widest tires possible maybe a 345 or even wider? The problem is that the fronts will only be 315's wide and it would cause severe understeer at the track.

Actually it might be a benefit because currently we oversteer too much haha!


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Re: 315 Square setup E-body `Cuda [Re: RylisPro] #2568728
10/24/18 06:37 AM
10/24/18 06:37 AM
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Posts: 41
raleigh, NC
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mcmopar1 Offline
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345’s would look awesome.....but moving the springs in 3” or so each side would have no affect on the handling?

Re: 315 Square setup E-body `Cuda [Re: RylisPro] #2568938
10/24/18 03:41 PM
10/24/18 03:41 PM
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Pikes Peak Country
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TC@HP2 Offline
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Moving the leaf springs inboard reduces the wheel rate about 10# per inch, so similar to running a lighter spring rate in the stock position.

Now, whether or not the butt dyno can feel a 30# rate change per side is highly subjective.

Re: 315 Square setup E-body `Cuda [Re: TC@HP2] #2569056
10/24/18 07:26 PM
10/24/18 07:26 PM
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Trumussia
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jcc Offline
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Originally Posted By TC@HP2
Moving the leaf springs inboard reduces the wheel rate about 10# per inch, so similar to running a lighter spring rate in the stock position.

Now, whether or not the butt dyno can feel a 30# rate change per side is highly subjective.


Only in roll, to be clear?

Re: 315 Square setup E-body `Cuda [Re: jcc] #2569060
10/24/18 07:32 PM
10/24/18 07:32 PM
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jcc Offline
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I don't see much reference to the fronts, any real issues there with fitment?

Looks great .

Function over form up

Re: 315 Square setup E-body `Cuda [Re: jcc] #2569328
10/25/18 12:46 PM
10/25/18 12:46 PM
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Pikes Peak Country
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TC@HP2 Offline
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Originally Posted By jcc
Originally Posted By TC@HP2
Moving the leaf springs inboard reduces the wheel rate about 10# per inch, so similar to running a lighter spring rate in the stock position.

Now, whether or not the butt dyno can feel a 30# rate change per side is highly subjective.


Only in roll, to be clear?


This would be in both ride and roll rate because the mounting location is altered, impacting the geometric formula.

Re: 315 Square setup E-body `Cuda [Re: TC@HP2] #2569361
10/25/18 01:59 PM
10/25/18 01:59 PM
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jcc Offline
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You are a member over many years I seldom ever disagree with, but this is one.

Leaf spring location relative to the tire contact patch does not change spring rate in ride, as there is not motion ratio other the 1:1.

Re: 315 Square setup E-body `Cuda [Re: TC@HP2] #2569362
10/25/18 02:00 PM
10/25/18 02:00 PM
Joined: Dec 2003
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jcc Offline
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Trumussia
Originally Posted By TC@HP2
Originally Posted By jcc
Originally Posted By TC@HP2
Moving the leaf springs inboard reduces the wheel rate about 10# per inch, so similar to running a lighter spring rate in the stock position.

Now, whether or not the butt dyno can feel a 30# rate change per side is highly subjective.


Only in roll, to be clear?


This would be in both ride and roll rate because the mounting location is altered, impacting the geometric formula.


You are a member over many years I seldom ever disagree with, but this is one. eek

Leaf spring location with a solid axle relative to the tire contact patch does not change spring rate in ride, as there is no motion ratio other the 1:1.

Re: 315 Square setup E-body `Cuda [Re: RylisPro] #2569445
10/25/18 04:36 PM
10/25/18 04:36 PM
Joined: May 2005
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USA
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Consulier Offline
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I have a pile of leftover 355's from this season if you want any for fitment testing.

355 square is where you want to be... up


Re: 315 Square setup E-body `Cuda [Re: Consulier] #2569467
10/25/18 05:45 PM
10/25/18 05:45 PM
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jcc Offline
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Summit $781/ea eek

Brand:Pirelli
Manufacturer's Part Number:2307500
Part Type:Tires
Product Line:Pirelli P Zero Corsa System Tires
Summit Racing Part Number:PIR-2307500

Wheel Diameter: 19 in.
Tire Size: 355/30-19
Sidewall Style: Blackwall
Tire Construction: Radial
Tire Diameter: 27.40 in.
Section Width: 14.00 in.
Minimum Recommended Wheel Width: 12.00 in.
Maximum Recommended Wheel Width: 13.00 in.
Directional: No
Speed Rating: Y
Load Index: 99
Asymmetrical Tread Pattern: No
UTQG Tread Wear Rating: 60
Traction Rating: AA
Temperature Rating: A
Tread Depth: 8/32 in.
DOT-Approved: Yes
Run-Flat Technology: No
Tube Required: No
Max Load Single (lbs): 1,709

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