Bolt in SLA for half the price of Agent 47 - Ford Mustang Forums : Corral.net Mustang Forum
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post #1 of 36 Old 08-06-2019, 03:42 PM Thread Starter
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Bolt in SLA for half the price of Agent 47

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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post #2 of 36 Old 08-06-2019, 04:13 PM
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Wont know till you finish it in your driveway. Go for it.

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post #3 of 36 Old 08-06-2019, 04:58 PM
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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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post #4 of 36 Old 08-06-2019, 04:58 PM
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Interesting.
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post #5 of 36 Old 08-06-2019, 09:54 PM
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I’ll give ya $10 if ya post pics

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post #6 of 36 Old 08-07-2019, 08:17 AM
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Interesting.
Yes. Very.
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post #7 of 36 Old 08-07-2019, 12:49 PM
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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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post #8 of 36 Old 08-07-2019, 07:17 PM
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OP, if you do it, and this works... I'm doing the same thing to mine. Hahahaha this would be hilarious.
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post #9 of 36 Old 08-14-2019, 02:53 PM
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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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post #10 of 36 Old 08-14-2019, 06:03 PM
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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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post #11 of 36 Old 08-14-2019, 06:40 PM
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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.

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post #12 of 36 Old 08-20-2019, 11:09 PM Thread Starter
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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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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.

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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.
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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post #13 of 36 Old 08-21-2019, 01:01 PM
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How much faster will i be around a track with this?

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post #14 of 36 Old 08-21-2019, 02:30 PM
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About > < that much.
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post #15 of 36 Old 08-21-2019, 02:30 PM
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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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post #16 of 36 Old 08-21-2019, 11:11 PM Thread Starter
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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.

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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.

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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.
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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post #17 of 36 Old 08-21-2019, 11:23 PM Thread Starter
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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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post #18 of 36 Old 08-21-2019, 11:42 PM
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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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post #19 of 36 Old 08-22-2019, 12:07 AM
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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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post #20 of 36 Old 08-22-2019, 09:24 PM
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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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post #21 of 36 Old 08-26-2019, 12:21 PM Thread Starter
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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?
The Mustang rear suspension is definitely lacking, as is the whole fox platform honestly.

The front strut design is fine for a street car, and can be modified to work pretty well for handling. But the short long arm design is one of those "have your cake and eat it too" situations. There's very little compromise with the design.

The car in question already has the whole Maximum Motorsports catalog on the rear axle, which works exceptionally well.

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post #22 of 36 Old 08-26-2019, 12:27 PM Thread Starter
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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.
Gotcha, I see what you're saying. I'll pay close attention to that. If I end up modifying my MM arms, I'll make sure to place the lower shock mount in a spot where it won't interfere with the upper arm.

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post #23 of 36 Old 08-26-2019, 12:42 PM
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Here's why-
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So why do you no longer sell suspension systems?
The owner of our company is also the founder and CEO of one of the biggest 3D printing houses in the country. He realized how much time, money, effort, and shop space was reserved for making only a handful of suspension systems each year. When he weighed that vs. what the 3D printing house could do with with those resources, it was obvious and made all the sense in the world to stop focusing on welded parts/parts that required purchasing and warehousing inventory like brackets, ball joints, and especially the jigs and fixtures. We still make small AGENT 47 parts and some aero stuff that we've always made in the 3D printing house.

The short term result of this redirect of resources is a doubling in size of the 3D printing house, to the point that we are one of the biggest in the country, and reassignment for the people that ran AGENT 47. I personally am now a 3D printer repair technician, and my counterpart is a department lead. We both jump in when AGENT 47 biz comes up.

We all hold a deep love for/stand behind AGENT 47, our customers, and products. The adventures that racing takes us on have been epic. We still race, still set lap records, and still win Championships.

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post #25 of 36 Old 08-26-2019, 01:28 PM
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Fair enough. It just seemed odd to bail on a proven line when I assume the costs were already amortized and were in a position of growth. I get the reallocation of resources. It's just sad to see something that actually worked well, vaporize.
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Did y’all at least keep the jigs? Seems like those and the design could be sold to someone looking to continue the line
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post #27 of 36 Old 08-26-2019, 07:43 PM
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Did y’all at least keep the jigs? Seems like those and the design could be sold to someone looking to continue the line

Ditto, I was aiming towards the Grigg's front kit or the Agent 47 parts, as my last project step.

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post #28 of 36 Old 09-01-2019, 11:44 AM
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Ed Hunter did something similar to this... there is a thread on here about his SLA system with pics, if they still exist.

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post #29 of 36 Old 09-01-2019, 07:19 PM
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Did y’all at least keep the jigs? Seems like those and the design could be sold to someone looking to continue the line
Yep. Still got em. That part of the business is for sale.
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post #30 of 36 Old 09-02-2019, 02:09 AM
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Here's the link that has part of Ed Hunters SLA build.

https://forums.corral.net/forums/roa...n-dollars.html
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Here's the link that has part of Ed Hunters SLA build.

https://forums.corral.net/forums/roa...n-dollars.html

I have to laugh at the concept that our SLA was more expensive than Griggs’”. If you look at what we offered which was a full solution with no compromise on the front end versus Griggs offerings you will see that they offered much lesser suspension options for the front for a little less money... but to get something that was equivalent to what we offered was double the cost of our SLA. If you ever watch the Ernesto Roco video that I made you’ll see that he bested his best ever time at his home track the first time out after switching to AGENT 47 SLA.

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Quote:
Originally Posted by BRYAN ROGERS View Post
I have to laugh at the concept that our SLA was more expensive than Griggs’”. If you look at what we offered which was a full solution with no compromise on the front end versus Griggs offerings you will see that they offered much lesser suspension options for the front for a little less money...
But that is kind of a moot point since you no longer sell suspension systems, right?
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post #33 of 36 Old 09-02-2019, 07:21 PM
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Quote:
Originally Posted by BRYAN ROGERS View Post
I have to laugh at the concept that our SLA was more expensive than Griggs’”. If you look at what we offered which was a full solution with no compromise on the front end versus Griggs offerings you will see that they offered much lesser suspension options for the front for a little less money...
But that is kind of a moot point since you no longer sell suspension systems, right?
Correct. Keywords- “was”, and “offered”.

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post #34 of 36 Old 09-02-2019, 08:14 PM
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i wonder why maximum never pursued a kit of their own?

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post #35 of 36 Old 09-02-2019, 10:35 PM
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i wonder why maximum never pursued a kit of their own?
I think for Maximum its time. Designing and developing an SLA takes time to get it right and turn it into a kit. Then they have to look at how much it will cost to do the work to develop the kit and how much they can sell it for in the end. Then its figuring out how many you have to sell to break even at the very least.
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