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Discussion Starter #1 (Edited)
Hi all.
I have the dreaded seatback collapsing, and I do have the GM tech
note on how to reset the reclining mechanism when it happens, but I
need to do something to prevent it in the first place, as it is very
unsettling during an autocross run.
I guess it's not happening to everyone, else there would be a sticky
post about it. On acceleration, especially coming out of right-hand turns,
when there is load on the seatback, both rearward and to the left, the
lefthand side recliner ratchet gives way so the seat flops back that way
while the right side stays up... I took the car to a shop today, telling them
to tack-weld the seatback pivot into one angle! They just called back
saying they couldn't because the mechanism is a mix of steel, aluminum
and fiberglass! I guess I'll stuff something behind the seat so it doesn't
fall back much, but darn, I wish there was a real fix. I'd buy a race seat
if it were OK for SCCA SS class...
thanks for listening,,,
Joe
 

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Joe,
Yes it has, as soon as I got better at autocross with racing tires, my seat back collapsed on one side like yours in a hard right hand turn (totally messed up my time). I fixed the problem by adding boat life vests behind the seat. They're light and provide the perfect seat adjustment for me (really got lucky).

I saw another guy's set-up which looked like he used spay can foaming installation. You may be able to adjust your seat, have someone sit in it, spray the foaming insulation into a bag behind the seat (be careful not to hurt the interior). That way you can remove it when you're not racing. I leave my padding in all the time.

Good luck
Vince
 

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Discussion Starter #3
I made a wedge out of swimming kickboards and some
expanding urethane foam. I bought a harness bar and
was going to put a pad between the seat back and the
bar, but decided that the harness bar is too heavy.
 
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