Help Support Bigcoupe.com

S2 seats compatibility in S1?

Post in this forum for topics relating to the interior.

Moderators: ron, bfons, GRNSHRK

Post Reply
gt40mk2
Posts: 24
Joined: Sun Mar 10, 2013 5:21 pm
Location: Toronto

S2 seats compatibility in S1?

Post by gt40mk2 » Thu Nov 19, 2020 4:24 pm

Will Series 2 manual sport seats fit in an S1 car?
1979 Euro E24

olympia57
Platinum Member
Platinum Member
Posts: 1328
Joined: Thu Sep 13, 2012 1:47 pm
Location: Ireland

Re: S2 seats compatibility in S1?

Post by olympia57 » Thu Nov 19, 2020 5:06 pm

Yes , bolt straight in .
I have fitted plates to allow my drivers seat to sit a further two inches rearwards to accomodate my 6' 4" frame but the standard bolt holes align.
IMG_0568 (2).JPG
IMG_0568 (2).JPG (919.46 KiB) Viewed 1059 times
1981 635 series 1

gt40mk2
Posts: 24
Joined: Sun Mar 10, 2013 5:21 pm
Location: Toronto

Re: S2 seats compatibility in S1?

Post by gt40mk2 » Thu Nov 19, 2020 5:09 pm

Thank you!
1979 Euro E24

ron
Platinum Member
Platinum Member
Posts: 4524
Joined: Sat Jul 10, 2004 11:35 am
Location: South Wales U.K.

Re: S2 seats compatibility in S1?

Post by ron » Thu Nov 19, 2020 5:22 pm

gt40mk2 wrote:
Thu Nov 19, 2020 4:24 pm
Will Series 2 manual sport seats fit in an S1 car?
Depends on how old the car is. The seats will fit but you may need to change the mounting frames.

My '79 633 had a "stepped floor" and needed totally different seat mounting frames to fit.

Not sure when they changed the floor structure to a "flat floor."

Can't find any pics to show you.
They are ALWAYS rustier than you thought!!!!!!
'85 M #228
'87 M #367
'88 High line.
'80 735i
'10 X5

bpoliakoff
Platinum Member
Platinum Member
Posts: 3060
Joined: Thu Sep 28, 2006 9:28 pm
Location: scottsdale, arizona
Contact:

Re: S2 seats compatibility in S1?

Post by bpoliakoff » Thu Nov 19, 2020 8:02 pm

Pre 82 has a different floor pan and adapter plates will have to be used to mount the rails
81 Euro 635 M90 with motronic. Currently under a complete nut and bolt restoration. Pictures at
flickr.com/photos/bertsphotos.

gt40mk2
Posts: 24
Joined: Sun Mar 10, 2013 5:21 pm
Location: Toronto

Re: S2 seats compatibility in S1?

Post by gt40mk2 » Thu Nov 19, 2020 10:14 pm

Thanks - I'm getting similar info on an E24 FB group. I don't think they'd go on my '79. Was asking because there's a beautiful pair of manual sports from an M6 for sale. Oh well . . . :(
1979 Euro E24

ron
Platinum Member
Platinum Member
Posts: 4524
Joined: Sat Jul 10, 2004 11:35 am
Location: South Wales U.K.

Re: S2 seats compatibility in S1?

Post by ron » Fri Nov 20, 2020 8:20 am

bpoliakoff wrote:
Thu Nov 19, 2020 8:02 pm
Pre 82 has a different floor pan and adapter plates will have to be used to mount the rails
Don’s car is ‘81 and that has a “flat floor”
They are ALWAYS rustier than you thought!!!!!!
'85 M #228
'87 M #367
'88 High line.
'80 735i
'10 X5

ron
Platinum Member
Platinum Member
Posts: 4524
Joined: Sat Jul 10, 2004 11:35 am
Location: South Wales U.K.

Re: S2 seats compatibility in S1?

Post by ron » Fri Nov 20, 2020 8:21 am

gt40mk2 wrote:
Thu Nov 19, 2020 10:14 pm
Thanks - I'm getting similar info on an E24 FB group. I don't think they'd go on my '79. Was asking because there's a beautiful pair of manual sports from an M6 for sale. Oh well . . . :(
Check your floor before you give up on the seats!
They are ALWAYS rustier than you thought!!!!!!
'85 M #228
'87 M #367
'88 High line.
'80 735i
'10 X5

olympia57
Platinum Member
Platinum Member
Posts: 1328
Joined: Thu Sep 13, 2012 1:47 pm
Location: Ireland

Re: S2 seats compatibility in S1?

Post by olympia57 » Fri Nov 20, 2020 12:46 pm

I'm anxious to ensure that I have given the correct answer to the OP's question and that if there is a difference between year models then I clarify what mine looks like .
My car is a Oct '81 build / registered.
The floor has two seperate internal cross members welded to tha actual floor . These X members each have two mounting captive nuts welded to the innards and these are used to attach the seat bracket bolts.
On my car these align perfectly with the OE seat frame runners on OE sports seats from a 1984 S2 car .
The two X members .
IMGP0003 (3).JPG
IMGP0003 (3).JPG (1.32 MiB) Viewed 1020 times
With carpet fitted .
IMGP2723 (3).JPG
IMGP2723 (3).JPG (942.66 KiB) Viewed 1020 times
External underside of floor .
DSCF7771 - Copy (3).JPG
DSCF7771 - Copy (3).JPG (398.88 KiB) Viewed 1020 times
Hope this helps .
Don
EDIT
Surely It would be simple enough to measure the pitch between the holes front to rear and side to side on your original in car seats and quickly establish if these are level or stepped F to R and then compare those dimensions with the proposed new seats . I would suspect that the M6 seats for sale will be the same as all post '82 sports seats and therefor the four mounts will be on the same plane .( as in level :roll: )
It's not a difficult thing to ascertain ...
1981 635 series 1

ron
Platinum Member
Platinum Member
Posts: 4524
Joined: Sat Jul 10, 2004 11:35 am
Location: South Wales U.K.

Re: S2 seats compatibility in S1?

Post by ron » Fri Nov 20, 2020 4:11 pm

I seem to remember that the "stepped floor" seat frames use 6 bolts to hold them to the floor.
They are ALWAYS rustier than you thought!!!!!!
'85 M #228
'87 M #367
'88 High line.
'80 735i
'10 X5

Post Reply

Who is online

Users browsing this forum: No registered users and 4 guests