DIY Schroth ASM Harness install

[DRKHR5]

Found this today.

http://shop.watsonracing.com/2015-S550-Mustang-6-Point-Roll-Bar-p/wr-15-boltincage6pt.htm

does the Schroth bolt right to this if I went Schroth in the meantime and bought this down the line? or are we talking big differences in the required Belts anyway? because im unsure how you attach belts to this 6 point Roll BAr

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[Anthony@HTM]

Found this today.

http://shop.watsonracing.com/2015-S550-Mustang-6-Point-Roll-Bar-p/wr-15-boltincage6pt.htm

does the Schroth bolt right to this if I went Schroth in the meantime and bought this down the line? or are we talking big differences in the required Belts anyway? because im unsure how you attach belts to this 6 point Roll BAr

With that you will need a 6 point harness and a fixed back seat. The harness will wrap around the roll bar.

 

[Anthony@HTM]

It's totally up to you.

If you install the 4 point system the OEM belt location is not centered. As you can see in the pictures the seat belt buckle is offset. So the harness will be pulling to one seat putting pressure on the seat.

It's my opinion that the child restraints are better than one point with a 3 point harness.

I took a really good look at both options.

Take a look at the mounting points for the lap belt compared to the child restraints and let me know what you find.

Like I said its up to you!

Any news/updates/truth to this.?

I was gonna order the same Schroth system as thr OP so I can have these 4 points for my next track outing... but am kinda discouraged when I see that the write-up points might not be the right ones.

Where are the "better for this application" bolt down points compared to the OP's if he didn't use the "correct" or "strong enough" points.

It looks like the directions diagram shows the mounting points identical to the OP's.... confusing.

Thanks!

 

[DRKHR5]

With that you will need a 6 point harness and a fixed back seat. The harness will wrap around the roll bar.

I was noticing the website says the cage is built in a manner that you will still have full seat mobility. Forward and backward. Does this mean it doesn't need to be a rigid back? and why does it need to be a rigid back in the first place?

Thanks man!

 

[Whiskey11]

Any news/updates/truth to this.?

I was gonna order the same Schroth system as thr OP so I can have these 4 points for my next track outing... but am kinda discouraged when I see that the write-up points might not be the right ones.

Where are the "better for this application" bolt down points compared to the OP's if he didn't use the "correct" or "strong enough" points.

It looks like the directions diagram shows the mounting points identical to the OP's.... confusing.

Thanks!

I'm not sure what specifically you are looking for for an answer? Scrhoth has a QuickFit setup for the 2005-2016 Mustangs that correctly and safely mounts to the factory locations to be usable on the street. It uses the two factory mounting points for the lap belt and uses the rear adult outside, lower point for the shoulder strap like the way I have done mine. You could use the Rallye4 and install both rear tail straps at both rear adult lap bed mounting points or buy one of their standard 4 point harnesses and use the bolt in roll bar you linked to from Watson.

From a safety standpoint, there is no way I'd use anchor points designed to restrain a kid in an accident over one designed to restrain an adult for a harness I'm going to use in an environment where any form of accident is even a remote possibility. Safety FIRST. Do it right, or don't do it at all as your life is far too valuable to lose.

 

[DRKHR5]

I'm not sure what specifically you are looking for for an answer? Scrhoth has a QuickFit setup for the 2005-2016 Mustangs that correctly and safely mounts to the factory locations to be usable on the street. It uses the two factory mounting points for the lap belt and uses the rear adult outside, lower point for the shoulder strap like the way I have done mine. You could use the Rallye4 and install both rear tail straps at both rear adult lap bed mounting points or buy one of their standard 4 point harnesses and use the bolt in roll bar you linked to from Watson.

From a safety standpoint, there is no way I'd use anchor points designed to restrain a kid in an accident over one designed to restrain an adult for a harness I'm going to use in an environment where any form of accident is even a remote possibility. Safety FIRST. Do it right, or don't do it at all as your life is far too valuable to lose.

Well first off... im asking what the OP of this thread did wrong because you called out potential concerns with his install. I have not seen pics of your install or the other options to mount the 4 point you are talking of. With this being the case... I was hoping I would see where you are indicating is safer. As well as... it seems others did his identical install. and the instructions aren't too clear if its adult points or child points (its just a simple diagram).

I gotta ask questions to get answers... or so I thought. (this will be my first harness install... the only thing I want to do is DO IT RIGHT).

So again... in the end. I saw the OP's method... I haven't seen the other mounting holes. I also question it in general because where he punched the belts through the rear seat (attached to the child restraint holes) the belts come through so flush and good looking. Maybe im crazy but if you are referring to any more "outside of the rear seat" holes... the belts aren't going to come through the rear seat that easily and would have to come through a much "meatier" section of the rear seat.

again... im in pursuit of visuals so I can clarify what is being said. In my mind... with the mounting points you are talking of... I either need to keep my rear seat removed for the belts to come from the adult points... or I have to sabotage the rear seat to get them to come thru.

As you can tell I have used my "Search" button as I should and am posting in any and all Harness threads. Just trying to do it right.

Also... you mention the Quick Fit. I read somewhere since its only 3 point that it pulls on the seat in inconsistent directions and shit... not really interested in something that isn't as SAFE or Functional as something a lil more involved or better overall choice.

All I want is a Harness. I do a lot of tracking and my damn knees hurt. :doh:

 

[Anthony@HTM]

I mentioned a fix back seat because typically when you put in a roll bar it's ideal to put in a fixed back seat because then you can use a 6 point harness.
2 points through the back which wrap around the bar, 2 points for the lap belt and 2 through the crotch area which will require drilling through the floor pan.

This will give you an extremely solid seat arrangement.

If you resuse your OEM seat you can only do a 4 point harness which doesn't include the crotch points. The downside to this is that you can slider down under the lap belt and get really messed up. This is why the 6 point is reccomended so it doesn't do that.

So if you do get a 4 point with the roll bar get a Scroth ASM 4 point harness. This allows your chest to slightly go forward so that you don't slide under the lap belt.


Back to the rear harness bolting points.

The only way I'd use the OEM belt buckle point is if you completely remove the back seat. If you look for yourself you'll find that the female buckle comes ip the side of the chassis to where there is a hole in the cushion.

If you were to leave the cushion in the belt will now pull towards the front of the car and will never be tight to you. So in an accident there would be some slack and then it would catch causing the bolt location to fail or worse.

Even with the cushion removed the points are off so they are NOT directly behind the seat. They are off to the left if you are sitting the car facing forward. In an accident it would pull the seat towards the door.

If you don't want to use the child restraint location even through it is braced much more than the OEM belt location then I would reccomend a rollbar.

Auto power makes one
So does cortex
http://cortexracing.com/product/bolt-in-roll-cage-4-point-2015-mustang-s550/

And then get a 4 point harness.

 

[Whiskey11]

The only way I'd use the OEM belt buckle point is if you completely remove the back seat. If you look for yourself you'll find that the female buckle comes ip the side of the chassis to where there is a hole in the cushion.

If you were to leave the cushion in the belt will now pull towards the front of the car and will never be tight to you. So in an accident there would be some slack and then it would catch causing the bolt location to fail or worse.

Even with the cushion removed the points are off so they are NOT directly behind the seat. They are off to the left if you are sitting the car facing forward. In an accident it would pull the seat towards the door.

If you don't want to use the child restraint location even through it is braced much more than the OEM belt location then I would reccomend a rollbar.

Auto power makes one
So does cortex
http://cortexracing.com/product/bolt-in-roll-cage-4-point-2015-mustang-s550/

And then get a 4 point harness.

You don't have to remove the rear seats to use the factory seat belt mounting points. The outboard mounting point is the exact location Schroth uses in their quickfit and it comes out the side of the seat between the outer door panel. They've done the testing to ensure this is safe so why try and reinvent the wheel here?


As for Autopower bars... this ruined them for me:

Their mounting pads for the floor pan are much too small to safely support the load of the car in a roll over. Why bother having the bar then? In a perfect world the roll bar would be sitting on the rear seat bulkhead like MM mounts theirs.

I'll try and get pictures of the rear mounting point but it's pretty self explanatory.

 

[Anthony@HTM]

That's why you weld in base plates.

I've wasted enough time here, good luck guys!

 

[Whiskey11]

That's why you weld in base plates.

I've wasted enough time here, good luck guys!

Welding in the base plates would not have fixed that issue. They are just too small to safely mount to the floor boards. Too much pressure in such a small area = holes in the floor! A bigger plate would work but the rear seat bulkhead is right there and so much stronger than the floor pan you'd be nuts to mount anything to the floor board. "Bolt in" doesn't even count since MM builds a completely bolt in roll bar for just about every Mustang Chassis and will have one for the S550's soon enough.

 

[C7 B8]

Thanks for posting. I run a 6-pt harness with rollbar now. Am looking at the ASM solution for my GT350 that I intend to keep pretty stock.

As for rollbars, I stayed away couple years ago from AutoPower based on this same photo and video. I second Maximum Motorsports (thats what I have now) and Watson Racing. I hear WR does Ford's race cars.

 

[pinero61]

Recently scored a WR roll bar, and will be getting Schroth anti sub harnesses to go with it.

 

[nikaf10]

Great write up anchormon! Used this to install my Takata Drift III.

 

[john9546]

Child Restraint Reinforcement Option 15-16 Mustangs

Ditto on the great write up and photo from Anchormon. I installed my Schroth ASM Rallye 4 Harness in a 2016 Mustang GT that will be used 95% as an Autocross car and occasional SCCA Time Trials car or NASA HPDE car. On using the child restraint bolt locations for the rear cross belt you may want to consider reinforcing one of the bolt locations by installing a 10mm nut to the bolt from an access point under the car. Only the innermost child restraint bolt locations have an access to the bolt threads from beneath the car. The largest socket you can use for the job is a 14mm because the access hole is narrow. So your 10mm nut must fit a 14 mm socket or you can do a file job on the nut to fit the socket. The child restraints bolt frame threads are only about ¼” so the worry is the bolt pulling through. The reinforcing nut is better than nothing. The outer child restraint bolt locations do not have a pass through opening under the car to access, so this child restraint bolt cannot be reinforced as I stated above. If having just one child restraint bolt reinforced and the other unreinforced is a problem for you, consider the another idea. Use the child restraint inner location with reinforcement as stated above, and then use the outer factory seatbelt location for the other attachment. The factory bolt is on the lower side of the outer edge of the seat. This is probably high enough that the pull on the seat and little resulting belt slack here should be acceptable. The resulting cross belt angle should be OK. However, I have not done this option yet to see if the resulting assumed minor slack and rear cross belt angle is acceptable. Good luck guys, be safe and have fun on the track.

 

[Plimmer]

Has anyone removed the OEM belts and disconnected the Supplemental Restraint System? Just wondering what happens when you remove all this stuff, does the airbag light stay on and the warning chimes go off.

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