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  Mustangsandmore Forum Archive
  '64 1/2 to '68 1/2 -- The Classic Mustang
  Granada Disc convertion: Does it change the track width?

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Author Topic:   Granada Disc convertion: Does it change the track width?
SundanceKid
Gearhead

Posts: 1302
From: UT
Registered: Feb 2001

posted 08-21-2001 02:51 AM     Click Here to See the Profile for SundanceKid        Reply w/Quote
I was measureing my 9" I pulled from a Granada and the wheel wells on my Mustang. To get the proper back spaceing for new rims, when I relized if the rear end is approx 1/2" wider does the front track get wider also?

Reason I ask is, I could get more backspaceing and hopefully reduce the scrub radius.
Also, anyone know if the kingpin inclination angle is changed from the Mustang spindle to the Granada?
What is the maximum back space you can run on a "65"?

Thanks in advance for any help you can give!

mellowyellow
Gearhead

Posts: 8198
From: So. Fl.
Registered: Aug 2000

posted 08-21-2001 09:56 PM     Click Here to See the Profile for mellowyellow        Reply w/Quote
I don't think that it would change the tread width-not noticeably. The control arms remain the same, I think, but the tie rod ends get changed. Someone called and asked me this question today and I recalled this thread. What's this about kingpins. Haven't seen or heard of them since one froze on my old Vette. Le's see if we can get some input.

franklin
Gearhead

Posts: 131
From: VA
Registered: Nov 2000

posted 08-22-2001 12:20 AM     Click Here to See the Profile for franklin        Reply w/Quote
I did the granada conversion and the first thing I noticed was I had to use the granada wheels. My original rims wouldn't clear the calipers and the center hole was to little. Using the granada rims and original 65 hubcaps, I noticed the wheels set farther out than original, I suppose because the backspacing is different to clear the calipers.

Greenstang
Gearhead

Posts: 908
From: its all a fog..
Registered: May 2001

posted 08-22-2001 01:43 AM     Click Here to See the Profile for Greenstang        Reply w/Quote
Mike,
The track width doesn't change and to my knowledge, neither doos the Kingpin inclination angle.
In terms of backspace off the top of my head, with 15 inch wheels, the max is 4 inches 9 I may be wrong, as I have a 68) with 16 inch wheels that figure should change to something like 4.5.

------------------
Marcus
Audi R8-
The new definition of "The Unfair Advantage."

mellowyellow
Gearhead

Posts: 8198
From: So. Fl.
Registered: Aug 2000

posted 08-22-2001 07:53 AM     Click Here to See the Profile for mellowyellow        Reply w/Quote
MARCUS: Does your car have the original 68 discs?? What kind of 16" wheels are you running?? Like to see a pic.

SteveLaRiviere
Administrator

Posts: 48752
From: Saco, Maine
Registered: May 99

posted 08-22-2001 06:37 PM     Click Here to See the Profile for SteveLaRiviere        Reply w/Quote
quote:
Originally posted by mellowyellow:
What's this about kingpins. Haven't seen or heard of them since one froze on my old Vette.

The kingpin inclination angle is the theoretical centerline through the upper and lower balljoints when viewed from the front or rear.

From the side, this centerline is referred to as caster.

------------------
'70 Mustang Mach 1 M code 351C 4V/FMX/3.25 open
'72 Mustang Sprint Coupe 351C 4V/FMX/4.30 Trac Lok
'94 F-150 XL 5.8L/E4OD/3.55 Limited Slip
'97 Probe GTS 2.5L DOHC
Ford. The closer you look, the better WE look!

SundanceKid
Gearhead

Posts: 1302
From: UT
Registered: Feb 2001

posted 08-23-2001 02:41 AM     Click Here to See the Profile for SundanceKid        Reply w/Quote
Yup, it is an imaginary centerline through the wheel as seen from the front or rear of the tire. The inclination angle is the angle between the wheel centerline, and again another imaginary line through the ball joints.
The idea is to find a happy medium on the kingpin inclination angle and reduce the scrub radius as much as possible.
By reduceing the scrub radius it makes the effort to turn the steering wheel easier.

As I see it the added track width on the rear end is from the disc rotor thickness.
I'm not quite ready to pull the suspention apart yet, but when I do I'll get back with everyone on the verdict.

Thanks again

SundanceKid
Gearhead

Posts: 1302
From: UT
Registered: Feb 2001

posted 08-23-2001 02:52 AM     Click Here to See the Profile for SundanceKid        Reply w/Quote
Greenstang, what gets in the way to limit the back spaceing to 4.5 ?

I measure the back and from doing a few searches on the forum I think I must be doing somethig wrong you guys tell me?

Ok, distance from leafsprings to wheel mount is 6.5" distance from wheel mount to inner most fender edge is 4" for a total of 10.5 inces of useable tire room.
I want to use a 17x8 rim wich in all actual real world measurement is a 9" wide rim end to end. so to fit the rim flush with the inner fender lip I will need 5.5 inches of backspace right/wrong?
Anyone try late model Mustang wheels on a 65?
The confuseing part is Moneymaker stated 3.75 max for backspace Mike didn't list what width rim and most agree 4.0-4.5 is the correct backspace? So am I measureing this out right?

68F100
Gearhead

Posts: 2835
From: Burlington, Iowa
Registered: Oct 99

posted 08-24-2001 02:55 AM     Click Here to See the Profile for 68F100        Reply w/Quote
Oh great! Just when I thought I was gettin' a hold on this amateur wrenchin', you guys tell me I gotta deal with IMAGINARY parts too?


Actually, if you have a 60's-70's F series, you know what king pins are, and they do actually exist.

SundanceKid
Gearhead

Posts: 1302
From: UT
Registered: Feb 2001

posted 08-24-2001 05:57 PM     Click Here to See the Profile for SundanceKid        Reply w/Quote
Hah, Imaginary or Theoretical parts! LOL I use em every time I go out to the garage! makes my Mustang look alot better! Funny though every one else sees my mustang as a heap of real parts?

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