heinzboehmer's 2002 Topaz 6MT Coupe

[bigjae46]

I'd like to keep the factory sliders, so current plan is to design some adapter brackets myself. I should be able to use the factory mounting points on the sliders, unlike the Brey Krause Nogaro brackets, which are designed to be bolted through some random holes on the top of the sliders. Need to figure out how to incorporate a sub strap bar cleanly into the design, but don't think it'll be a big issue.

That might be tricky because wouldn't you want the sub straps to slide with the seat? Not saying a sub strap bar can't be a reasonable compromise but they defeat the main benefit of a 6pt harness. A sub strap spreads the load to a 5th and 6th point. Bolting it to a bar which is attached to the seat is just adding to the stress on the seat mountings and the seat. Just keep in mind that safety systems aren't just designed for the first impact, the subsequent impacts are what cause most the injuries and death.

I don't want to come off as you need a full cage and bubble suit or its instant death...just want to make sure an informed decision is being made. Coming from someone who drives on the track in shorts...lol

[karter16]

karter16 Is it easy enough to measure the static offset of the seat to the rails? Curious to hear that number as the CSL seat is sort of notoriously wide/loose, so comparing to the tunnel is tough. I'm at 26mm offset toward center with my latest brackets and could probably get to ~31 without the pedals feeling weird.

Yep just measured - seat is offset ~30mm (allowing for a few mm of tolerance for manual measuring) towards the centre.

Edit: did not divide by 2

[0-60motorsports]

karter16 Is it easy enough to measure the static offset of the seat to the rails? Curious to hear that number as the CSL seat is sort of notoriously wide/loose, so comparing to the tunnel is tough. I'm at 26mm offset toward center with my latest brackets and could probably get to ~31 without the pedals feeling weird.

Love my CSL seats even though now they need new sponge due to age LOL

[Bry5on]

karter16 Is it easy enough to measure the static offset of the seat to the rails? Curious to hear that number as the CSL seat is sort of notoriously wide/loose, so comparing to the tunnel is tough. I'm at 26mm offset toward center with my latest brackets and could probably get to ~31 without the pedals feeling weird.

[karter16]

Pretty rough and quick (units are somehow messed up, e.g. what shows as 5.88mm is actually 58.8cm). Appears that the angle between the seat and the steering wheel differs by approximately 3-4 degrees. You can also see in this scan how the seat is positioned as close to the transmission tunnel as possible, there's quite a gap on the door side.




And seems to be <1cm off between centre of wheel and centre of seat.



I'm sure a proper scanner would make this more accurate, but I don't think it's miles off - I got a decent enough capture to define decent reference points where it mattered.

[heinzboehmer]

Hmm, okay, well, looks like I'm gonna be poking myself in the lower back whenever I get into the car. I wonder if I can modify the seat cover so that it looks and works like the M4 GTS seat...

Edit: I think the answer is no. Thought there would be more foam between the cover and seat shell:



Edit 2: Wait, there is! It's just on the shell side, not the cover side. I'll have to mess with the seats once I have them in hand:

I can do a photo through sunroof, or a iPhone scan but don’t have a proper scanner…

Edit: also my car is RHD lol

RHD is easy to fix in post!

[karter16]

Just need a donor to scan! Beats a photo

I can do a photo through sunroof, or a iPhone scan but don’t have a proper scanner…

Edit: also my car is RHD lol


Sent from my iPhone using Tapatalk

[Bry5on]

I was going to say scan, but I don't know if karter has a 3D scanner and I did not want to give him another project

Maybe Kaiv still has his set?

He sold his, but if there’s anyone else in SD, you know I’m game to scan.

[Slideways]

Just need a donor to scan! Beats a photo

I was going to say scan, but I don't know if karter has a 3D scanner and I did not want to give him another project

Maybe Kaiv still has his set?

[Bry5on]

I'd like to see an overhead shot taken through the sunroof of a CSL seat and compare how centered the seat is in relation to the steering wheel.

Just need a donor to scan! Beats a photo

[Slideways]

I'd like to see an overhead shot taken through the sunroof of a CSL seat and compare how centered the seat is in relation to the steering wheel.

[George Hill]

Is your buddy's receiver placed above or below that elastic divider in the side hole? Recaro advertise that divider as a safety feature that isolates the three point from a 4/5/6 harness and I think you're supposed to put the factory receiver on top, so that the elastic holds it out of the way when you get in/out. I have an email out to Recaro to confirm, but have not heard back yet.

[Obioban]

I briefly had SPG XLs in my M3 wagon, and it very quickly made me realize many things I strongly wanted to avoid in a bucket seat that sees any street use. Pretty terrible choice for a street car.

[bavarian3]

Looking forward to watching this unfold. Perfect timing as I'm looking to get into some pole positions (or maybe just end up with sportsters) soon.

[heinzboehmer]

Those aluminum VAC/Macht Schnell adaptors are garbage. People claim safety but threading grade 8 bolts into threads that are tapped into aluminum is somehow a good idea?

Just order two sections of 3/4" T-6061 aluminum bars. Outboard will be 4" wide x 24" long, inboard will be 2" wide x 24" long. That will be enough room to center the seat. The only trick is the mountings will need to be milled out so the OEM nut/bolt fits. I used a forstener bit to countersink those holes.

I did not have any issues bolting the side mounts through the bar. You may run into clearance issues under the floor adaptor with the sheet metal. May need to mill out the bottom so that nut/bolt doesn't protrude underneath.

I use 3/8" thick compression molded carbon kevlar adaptors - 35 layers! Side mounts are bolt through with grade 8 bolts, nuts, and fender washers.

I'd like to keep the factory sliders, so current plan is to design some adapter brackets myself. I should be able to use the factory mounting points on the sliders, unlike the Brey Krause Nogaro brackets, which are designed to be bolted through some random holes on the top of the sliders. Need to figure out how to incorporate a sub strap bar cleanly into the design, but don't think it'll be a big issue.