Simpson Harness with Breeze adjustable seat base

[Tbev]

Hi all,
I am coming to the end of my build and just came across the lack of directions from FFR regarding the installation of the antisubmarine section of the system. I have searched the forums and have seen what others have done but have not come across any responses from those who have the Breeze adjustable base installed on their seats. Anyone out there willing to share how they ran the antisubmarine leg of the belt with the Breeze base? I originally thought that I could bolt it to the Breeze base itself but am concerned that this may not be the safest/strongest option. If I bolt it through the steel plate in the floor where do I bolt it since the seat is adjustable?
Thanks,
Tony

[Jonathan D]

You are ahead of me on my build Tony but I'm thinking you may have to just adjust your seat to where its going to be for you 99% of the time and then bolt to the steel frame plate. To me thats the safe bet but others may have come up with something else.

[Tbev]

You are ahead of me on my build Tony but I'm thinking you may have to just adjust your seat to where its going to be for you 99% of the time and then bolt to the steel frame plate. To me thats the safe bet but others may have come up with something else.

Thanks for the reply Jon. I was initially thinking the same thing. After reading several of the replies from other threads regarding this topic, I got the sense that the main purpose of the antisubmarine belt was to keep the lap belt in its proper place. Since I will not be tracking the car I felt it should be strong enough if I bolted it to the Breeze top plate that bolts to the seat. That way if the seat is ever moved the belt will always be in the proper place. I also figured that if that seat base is strong enough to hold the seat in place it should be strong enough to hold the antisubmarine belt.
I recognize that my logic may be way off and that is why I am posting the question here for the experts to weigh in. Thank you.

[rich grsc]

If you are in a collision bad enough to rip that steel plate out, no amount of seatbelt is going to make a difference.

[Tbev]

If you are in a collision bad enough to rip that steel plate out, no amount of seatbelt is going to make a difference.

Thanks Rich. That was my thoughts exactly. I just needed to hear it from someone who has a little (or in your case a lot) more experience than I.

[JohnK]

Here's my $0.02, FWIW. Bolting the sub strap to the Breeze base is far more convenient that bolting it to the cockpit floor, as it will move with the seat (though I wonder how many folks that have installed Breeze bases have ever moved their seats?). Rich is right, the Breeze mount is more than strong enough to handle any load you're going to experience in a crash. The purpose of a sub strap in an upright seating position is just to keep the lap belt from riding up, so the forces are not that high. That said, I wasn't one to leave well enough alone so I added a piece of 1/8" steel bar stock across the width of the seat as a reinforcement for the sub strap mount. This way, the pulling force (whatever that may be) is spread across three fasteners rather than just one and is distributed laterally across the entire width of the seat. Overkill? Yeah, but easy enough and not that expensive. It's a little bit of added peace of mind for something that likely wasn't a problem to begin with. :p

https://thefactoryfiveforum.com/attachment.php?attachmentid=188249&d=1691070793

[Tbev]

Here's my $0.02, FWIW. Bolting the sub strap to the Breeze base is far more convenient that bolting it to the cockpit floor, as it will move with the seat (though I wonder how many folks that have installed Breeze bases have ever moved their seats?). Rich is right, the Breeze mount is more than strong enough to handle any load you're going to experience in a crash. The purpose of a sub strap in an upright seating position is just to keep the lap belt from riding up, so the forces are not that high. That said, I wasn't one to leave well enough alone so I added a piece of 1/8" steel bar stock across the width of the seat as a reinforcement for the sub strap mount. This way, the pulling force (whatever that may be) is spread across three fasteners rather than just one and is distributed laterally across the entire width of the seat. Overkill? Yeah, but easy enough and not that expensive. It's a little bit of added peace of mind for something that likely wasn't a problem to begin with. :p

https://thefactoryfiveforum.com/attachment.php?attachmentid=188249&d=1691070793

I actually have a piece of steel laying around that I could do exactly what you did there. I would love to hear how you modified the seat to have the belt come up through the seat instead of going up in front. Thank you!

[JohnK]

The seats are Ultrashield low back buckets (similar to Kirkey's) that I had reupholstered by a local shop. You can see more in my build thread here (https://thefactoryfiveforum.com/showthread.php?31167-Greek-Guys-Garage-Roadster-Build-9509-(Nice-shoutout-on-Insta-about-my-build)&p=473565&viewfull=1#post473565). I recall that a few other builders have found plastic pass-through grommets that allow you to cut a slot in the FFR seat for the sub strap rather than wrapping it around the front of the seat. Something like this (https://treperformance.com/i-7442855-corbeau-5th-slot-install.html).

[jrcuz]

I have the plastic pass thru JohnK linked to above. My car is at the painters now so when I get it back I'll install them.
JR

[Tbev]

I have the plastic pass thru JohnK linked to above. My car is at the painters now so when I get it back I'll install them.
JR

Are they easy to install or do you need to bring the seats to an upholstery shop?

[BrewCityCobra]

Glad you posted this question, I don't have the Breeze unit but do have my seats on sliders and have been wondering what to do with the submarine belt to accommodate the motion as well. Curoius to see what solutions pop up.

Has anybody bolted it to the seat itself (E.g., the 3/4" square tubing forming the base)? it doesn't seem particularly rigid but then again I'm not sure what type of force the submarine belt even sees during a collision.

[jrcuz]

I'll probably take mine to an upholstery shop.
JR