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Old 05-15-2008, 10:28 AM
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Suspension Geometry? Recommendations...

I am trying to come up with some suspension ideas for a Austin Healey 3000 I am building. I was looking at the MII setup but I really would like to keep the project on a budget. Also the front track is narrow at 48.7", I was thinking about just either making or ordering some kind of adjustabe upper and lower A arms, some brackets and use the MII spindle. I will probably keep the manual steering, the car is going to be light so that shouldnt be problem. I do however want to make sure it is safe to drive, I thought there would be someone on here that can either advise me in suspension geometry or direct me to a good book I can read to help.
Thanks

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Old 05-15-2008, 09:08 PM
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Carroll Smith's Tune to Win would help give you a good start at the geometry.
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Old 05-16-2008, 01:24 AM
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Quote:
Originally Posted by silver86
I am trying to come up with some suspension ideas for a Austin Healey 3000 I am building. I was looking at the MII setup but I really would like to keep the project on a budget. Also the front track is narrow at 48.7", I was thinking about just either making or ordering some kind of adjustabe upper and lower A arms, some brackets and use the MII spindle. I will probably keep the manual steering, the car is going to be light so that shouldnt be problem. I do however want to make sure it is safe to drive, I thought there would be someone on here that can either advise me in suspension geometry or direct me to a good book I can read to help.
Thanks
well we have something in common......I am trying to do the same as you...
my track W. is narrow like yours (anglia).....what are your geometry concerns?? I know something about m2 fronts....

Ian
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Old 05-16-2008, 01:55 AM
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forgot to mention...."Elpolacko" wrote a very detailed submission on M2 and posted it on the H.A.M.B.

THE THREAD IS CALLED ' HOW TO MUSTANG II, DEUX '

he explains a lot about making your own and fitting up....

Ian
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Old 05-16-2008, 02:26 PM
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If you're looking to build your own MII, here are some dimensions that should help you out. This is directly from our website.

Although the Mustang II is not the best layout for competition, it is a tried and true
geometry for thousands of street rods and hundreds of thousands of highway miles. Many manufacturers have all of the parts needed (spindles, brakes, springs, sway bars, etc.) Of course, we hope you will use some Welder Series parts in your design.

The upper arm pivot points are shown as 29-1/2 apart. The stock upper arms adjust in slots, so this dimension is not absolute. It is a starting point, and one that can be used when the upper arms will use threaded adjusters to dial in the alignment.

The side view shows the upper arm pivot center line at the front, the center, and at the back. These dimensions will give the stock Mustang II anti-dive angle of 4 degrees.



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Old 05-16-2008, 02:40 PM
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tripwalking....question???

your dwg. shows lower c/a pivot bolts at 22 1/4" apart.....

what hub to hub measurement will result w/stock ontrol arms and spindles attached at those points??

I think perhaps 56 1/2" overall hub to hub??

I had measured a stock pinto crossmember and the pivot holes were 21 3/4"
apart and I may be wrong but stock pinto hub to hub is narrower than M2...
I think pinto was 56" from factory????

can you shed some light on the difference in widths between into and M2..

and if width differences occured only because of pivot locations of control arms??

thanks




Quote:
Originally Posted by tripwalking
If you're looking to build your own MII, here are some dimensions that should help you out. This is directly from our website.

Although the Mustang II is not the best layout for competition, it is a tried and true
geometry for thousands of street rods and hundreds of thousands of highway miles. Many manufacturers have all of the parts needed (spindles, brakes, springs, sway bars, etc.) Of course, we hope you will use some Welder Series parts in your design.

The upper arm pivot points are shown as 29-1/2 apart. The stock upper arms adjust in slots, so this dimension is not absolute. It is a starting point, and one that can be used when the upper arms will use threaded adjusters to dial in the alignment.

The side view shows the upper arm pivot center line at the front, the center, and at the back. These dimensions will give the stock Mustang II anti-dive angle of 4 degrees.



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Old 05-16-2008, 03:50 PM
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Hi, thanks for your question.
You're right: the track width will be about 56-1/2". This depends on several factors: mainly the brake kit used and the wheel backspacing. The reference point we like to use is the wheel mounting flange (wmf) to flange dimension. With the 22-1/4" lower arm pivot hole centers and stock lower arms horizontal, the wmf dimension will be about 56-1/2" with stock rotors.

Regarding the lower arm mounting hole dimension, there are a couple of things that might be happening here.

I am not aware of any dimension difference between the 74-80 Pinto and the 74-78 MII. Stock, they were all about 56-1/2". We call our front end 56" because of the brake kit variable.

The 22-1/4" dimension is center-to-center. The holes are 1/2" diameter, so the inside dimension would be 21-3/4" if you happened to measure that way... is that a possibility?

A second thing is that the first series Pinto (71-73) might be narrower. I don't know much about them except that the parts don't interchange.

Thanks again for your question.


Quote:
Originally Posted by dustyrustee
tripwalking....question???

your dwg. shows lower c/a pivot bolts at 22 1/4" apart.....

what hub to hub measurement will result w/stock ontrol arms and spindles attached at those points??

I think perhaps 56 1/2" overall hub to hub??

I had measured a stock pinto crossmember and the pivot holes were 21 3/4"
apart and I may be wrong but stock pinto hub to hub is narrower than M2...
I think pinto was 56" from factory????

can you shed some light on the difference in widths between into and M2..

and if width differences occured only because of pivot locations of control arms??

thanks
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Old 05-16-2008, 04:07 PM
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Actually, the 21 3/4" distance was the real center distance between the holes and not edge to edge....and it was taken off an oem c/member...and I believe it is pinto.

thanks for clarifying width at your end....heve always wondered why some suppliers state 56" and others 56 1/2"

I do have a further question????

On u tube you have a video showing a new product for you:

an upper coil-over mounting tower kit for M2 a-arms.....(front susp)

I could not find any info on it on the welder series web site.

I was wondering what the kit costs, complete w/coilover mount brackets???

and if possible, could a set of assembly/mounting instructions be e-mailed to me as I would really like to see what the unit is all about and determine if it is suitable for a project that I have?

my email address is rustee50@yahoo.ca

thanks, Ian



Quote:
Originally Posted by tripwalking
Hi, thanks for your question.
You're right: the track width will be about 56-1/2". This depends on several factors: mainly the brake kit used and the wheel backspacing. The reference point we like to use is the wheel mounting flange (wmf) to flange dimension. With the 22-1/4" lower arm pivot hole centers and stock lower arms horizontal, the wmf dimension will be about 56-1/2" with stock rotors.

Regarding the lower arm mounting hole dimension, there are a couple of things that might be happening here.

I am not aware of any dimension difference between the 74-80 Pinto and the 74-78 MII. Stock, they were all about 56-1/2". We call our front end 56" because of the brake kit variable.

The 22-1/4" dimension is center-to-center. The holes are 1/2" diameter, so the inside dimension would be 21-3/4" if you happened to measure that way... is that a possibility?

A second thing is that the first series Pinto (71-73) might be narrower. I don't know much about them except that the parts don't interchange.

Thanks again for your question.
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Old 05-16-2008, 04:25 PM
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You're trying to get me in trouble for advertising, aren't you??

If you click on the store link in the upper right corner of the home page, then go to "kits", you'll see the coilover versions at the bottom of the page.

Nobody really says 56-1/2" because 56" is easier and even that dimension is nominal with different brake kits.

I'm sorry you had troubles finding something on our site. We're working hard to get that fixed.

I'd be glad to send you a copy of the instructions. You may want to edit your email address so it doesn't get flagged by spam crawlers... something like this: dw at welderseries dot com

Thanks!
dw
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Old 05-16-2008, 04:39 PM
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you won't get in trouble.....I might for doing the advert. for you, LOL!!!

Thanx for mail address tip....never considered spam crawlers....

will go to site now and try to scare up the bracketry....

looking forward to getting assembly/mounting infor...

cheers, ian




Quote:
Originally Posted by tripwalking
You're trying to get me in trouble for advertising, aren't you??

If you click on the store link in the upper right corner of the home page, then go to "kits", you'll see the coilover versions at the bottom of the page.

Nobody really says 56-1/2" because 56" is easier and even that dimension is nominal with different brake kits.

I'm sorry you had troubles finding something on our site. We're working hard to get that fixed.

I'd be glad to send you a copy of the instructions. You may want to edit your email address so it doesn't get flagged by spam crawlers... something like this: dw at welderseries dot com

Thanks!
dw
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