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I recently purchased the HTE-R for my 92 miata with stock floor pan and humps. I tried using my PCI (Non-adjustable) mounts mounts holes length wise don't quite line up. Wondering which seat mount I should get for those who have this same seat? Thinking either garage star or pci adjustable.
Jerfspeed is the answer, always. All other brackets are inferior. I can say from experience that the PCI adjustable is miserable to deal with just due to the small confines of the Miata. I have the same seat as well. I now have Jerfspeed on both driver and passenger side and can have the seats out in two minutes each.
I think that's a bit strong of a statement. The Jerfspeed brackets are very versatile but they are swiss-cheesed up with slots (which, since oriented with the front slots horizontal and rear slots vertical, reduce how much the seat is constrained from rotating fore/aft) and have a relatively small rear mounting tab to get behind the rear hump area.
Not trying to knock the product, but I think it's worth considering the tradeoffs and recognizing that other mounts with less fitment flexibility may be physically stronger and less reliant on clamping of slotted connections. On the other hand, the Jerfspeed brackets are likely stronger than stock, and a well-fitting seat with lots of headroom is one of the bigger safety factors you can add to the car.
The Jerfspeed brackets are very versatile but they are swiss-cheesed up with slots (which, since oriented with the front slots horizontal and rear slots vertical, reduce how much the seat is constrained from rotating fore/aft) and have a relatively small rear mounting tab to get behind the rear hump area.
Both of these were considered during design. I've hesitated posting this publicly because the slot orientation is part of what makes my brackets work so well for so many people, but I include this blurb in the install instructions:
"Don't be surprised or concerned if you feel the seat slipping a little bit during your first couple
sessions on track. As the chassis flexes during bumps and cornering, the seat will slip downward
in the rear slots until it is making maximum contact with the floor pan. This is not a concern for
crash safety. The perpendicular slot design (horizontal front, vertical rear) makes it so that the
only way the seat can slip in the slots is up or down in the rear slots. With the seat touching the
floor as intended, the only remaining way the seat can possibly slip is UP in the rear slot. This is
a condition which never happens while driving or in a crash. The seat restrains you in the
downward, rearward, and sideways directions. The harness restrains you in the forward and upward
directions. For this reason, the seat should never see any loading that causes it to slip upward in the rear
slots."
You're right that the slotting does "swiss cheese" the metal and reduce strength, but I tried to counter this by leaving a lot of space (more metal) between the slots instead of crowding them tightly together to maximize range and fine tuning of seat position. I also spend a decent amount extra for higher grade steel that's almost twice the strength of typical mild steel sheet. My early versions had holes instead of slots and I preferred that design for strength, but the slots were a necessary evil to cover a large range of seats and drivers, and they aren't any worse than a lot of other mass produced brackets. Most brackets with slots have horizontal slots front and rear which I see as a major safety issue because the seat can slide back in the slots in a rear collision and slack the harnesses.
And yes the rear mounting tabs are small, but they don't see any downward loads, and with the higher grade steel I'm comfortable with their strength during a side impact.
True, I meant solely in terms of ease of mounting a large seat in a small car. But I did not clearly communicate that part. All other brackets that I personally have used (PCI adjustable, Planted, and Garage Star) were a test to my patience trying to get low enough and dealing with the tight tolerances to get to all of the adjustment bolts. The Jerfspeeds literally take me mere minutes to get the seat in or out of the car.
True, I meant solely in terms of ease of mounting a large seat in a small car. But I did not clearly communicate that part. All other brackets that I personally have used (PCI adjustable, Planted, and Garage Star) were a test to my patience trying to get low enough and dealing with the tight tolerances to get to all of the adjustment bolts. The Jerfspeeds literally take me mere minutes to get the seat in or out of the car.
Just a follow up 8 months later, the Jerfspeed bracket was an excellent call. Has me sitting very low, also have learned best practices for sub belt location. Before it was attached to the base of the PCI bracket via eyelet bolts. I changed the clip on style to bolt on tabs and drilling through the floor with a backing plate. Going to measure where my chest center line is for proper location of the sub belt.
I found my stock 3pt belts absolutely useless with the halo seat, i dont own a truck and trailer, so this is driven on the street to the track events. I refuse to wear harnesses on the street as I don't want to experience a skull Basel fracture... but the 3pt don't retract. I might have to figure a way to fix that or run harnesses on the street which aren't ideal.
01-11-2022, 09:25 PM
Seat bracket? For OMP HTE-R 400
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