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Discussion Starter #1
I had a bit of an epiphany today. The factory 5 cobra guys run an SLA on their kit cobras and use fox platform parts like brakes and spindles. So maybe that stuff would work on a Fox?

Use Factory 5 upper and lower a-arms along with their single adjustable koni's (which use regular old 8" x 2.5" Hypercoil springs) and their adapter piece to convert the old mustang strut mounting point into an upper ball joint mounting point. Then use a Griggs SLA tower to mount the upper a-arm and shock to the Mustang frame rail.

The only thing that would need to be welded is an ear for the stock mustang swaybar endlink.

Here are the parts:

Untitled

A ARM

Griggs-Racing-Performance-Mustang-Chassis-SLA-Mini-Tower-SLA-9000-3-P1

In the end this is what it would look like:

100_4073

I'm dumb enough to try this. Anyone see a reason why it wouldn't work? I think the geometry between the Griggs and Factory 5 is similar enough to where it would be fine. Plus the Factory five parts are "standard width Mustang."
 

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I have no information to give on the subject but I’m following to find out. Seems like it would work out fine.


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Interesting.
 
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That's a pretty cool idea. Let us know how it works out if you decide to go ahead with it! I might look into doing the same thing on a Fox platform track car build that I've planning to do in the next year or so.
 

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are you gonna try it SuperChicken?

maybe call factory five and talk to them as they are great guys to deal with

curious how the arm length compares
 

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Since factory five has all of or most of the parts I'm sure they know if it would work or not. Might be worth thier while to put a package together for the fox platform.

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Your title- "1/2 the price of AGENT 47" is kind of a moot point since we no longer sell suspension systems.

Continuing on the moot point- Our SLA systems were complete with Penske, (and later JRi) coil overs. Our system was roughly 1/2 the price of the Griggs front suspension.

2014/'15/'16 NASA AI National Champions. Same driver. 2 completely different cars. Both with our suspension.
 

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Discussion Starter #12
are you gonna try it SuperChicken?

maybe call factory five and talk to them as they are great guys to deal with

curious how the arm length compares
Since factory five has all of or most of the parts I'm sure they know if it would work or not. Might be worth thier while to put a package together for the fox platform.

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That's a great idea. I will definitely reach out to them and see what they say.

I'm curious about the arm length as well. Honestly though, I may just save some cash and weld a lower shock mount to the MM arms I already have.

And yes I absolutely do plan to do this as soon as I raise enough cash.

Your title- "1/2 the price of AGENT 47" is kind of a moot point since we no longer sell suspension systems.

Continuing on the moot point- Our SLA systems were complete with Penske, (and later JRi) coil overs. Our system was roughly 1/2 the price of the Griggs front suspension.

2014/'15/'16 NASA AI National Champions. Same driver. 2 completely different cars. Both with our suspension.
Yes, that's correct about being a moot point I suppose. Was only trying to illustrate a cost reference since every fox road racer has priced out SLA systems at some point, if only just to daydream about. Also, the parts I listed above and ran costs of included the Koni SA shocks supplied from Factory Five.
 

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How much faster will i be around a track with this?
 

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About > < that much.
 
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The spindle adapter that locates the upper ball joint is substantially different between Griggs and Factory 5. You may run out of adjust-ability of camber before you get to anything appropriate for your purposes.
 

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Discussion Starter #16
How much faster will i be around a track with this?
I'll let you know! Currently I'm consistently about 2 seconds off pace of where I want to be, so that should be a good benchmark. There's a Lotus Exige and a couple of C6 ZO6's that keep edging me out.

About > < that much.
I've been autocrossing enough to know that the gap in raw time between the top 10% and top 1% is about that > < much. I'll happily take any and every advantage please, especially being an open mod CAM class. There's no excuses in CAM. If the car isn't fast enough, then just hack it up and build it faster.

The spindle adapter that locates the upper ball joint is substantially different between Griggs and Factory 5. You may run out of adjust-ability of camber before you get to anything appropriate for your purposes.
Ahh, you're right! Thank you for pointing that out. I went back to Factory Five and noticed they have another part that looks much more favorable. Not quite the same position as the Griggs picture, but I think it's doable. What do you think?

I can't remember what the upper arm spindle pivot position affects. Angle of inclination/scrub radius I think?

 

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Discussion Starter #17
I found the upper a arm in that Griggs pic. It's an off the shelf part at Jegs, and it's designed for the Mustang II suspension lol. Plus it's even cheaper than the FF part, and comes with the balljoint.



 

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May I ask, why spend effort and $ on the front suspension when the fox/sn95's weak spot is its rear axle?

(Love the SLA hack, though)
 

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Ahh, you're right! Thank you for pointing that out. I went back to Factory Five and noticed they have another part that looks much more favorable. Not quite the same position as the Griggs picture, but I think it's doable. What do you think?

I can't remember what the upper arm spindle pivot position affects. Angle of inclination/scrub radius I think?
I'm just going off the photos of the Griggs set up, but my main question is that as the Factory 5 piece mounts inline with the spindle ears, it appears it would put the ball joint and that area of the control arm in the same space as the spring (at least partially). You could adjust the arm longer but you would lose all your negative camber.
 

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Your title- "1/2 the price of AGENT 47" is kind of a moot point since we no longer sell suspension systems.

Continuing on the moot point- Our SLA systems were complete with Penske, (and later JRi) coil overs. Our system was roughly 1/2 the price of the Griggs front suspension.

2014/'15/'16 NASA AI National Champions. Same driver. 2 completely different cars. Both with our suspension.
So why do you no longer sell suspension systems?
 
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