the_big_1
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| posted on 18/7/17 at 07:16 PM |
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Seat mounting assistance
Hi guys,
Building a Haynes roadster and have almost all the chassis done now, drive train going in as we speak.
Trying to finish off as much chassis welding as I can.
One bit I haven't started is seat mountings.
Is there any good seat mounts to use that have dimensions etc so I can check what extra box section I might need?
One that gives me options of what seats I can fit later etc?
Cheers!
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craigdiver
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| posted on 18/7/17 at 09:59 PM |
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I used adjustable seat runners (ebay item 400445128863) for the drivers seat. I had to make custom subframes for both seats. I would recommend getting
hold of the runners as fitting supports just by measurements is going to cause problems.
If it ain't broken, fix it anyway (just because).
Building - BMW powered Haynes Roadster/442E hybrid.
Volvo C30 T5 Polestar
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jps
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| posted on 18/7/17 at 10:26 PM |
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I'm mounting onto 3mm x 25mm strips. you don't need to use box section
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the_big_1
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| posted on 19/7/17 at 06:27 AM |
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Hi,
I guess one issue is what the seats, I will not know mounting position for the seats. Can anyone recommend a good place to get some low cost seats,
padded or GRP type are fine.
Will the 3mm x 25mm be strong enough? The distance between the two cross box sections I am mounting too are 763 mm front to back or 452 mm left to
right?
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CosKev3
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| posted on 19/7/17 at 08:00 AM |
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I would go wider than 25mm tbh,once you have drilled 25mm flat bar you haven't got much meat either side, also it doesn't give you much
leeway for fitting any different seats at a later date etc.
My Mac1 has circa 50mm flat plate, which at a guess is 5mm thick,running across the floor pans.
[Edited on 19/7/17 by CosKev3]
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40inches
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| posted on 19/7/17 at 08:49 AM |
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You need to get the seats first, them fabricate the mountings to suit.
I used GRP seats, runners and 25mm box section.
 
Brake line
 
Seat base runners
 
Description
[Edited on 19-7-17 by 40inches]
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jps
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| posted on 19/7/17 at 10:38 AM |
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quote:
Originally posted by CosKev3
I would go wider than 25mm tbh,once you have drilled 25mm flat bar you haven't got much meat either side, also it doesn't give you much
leeway for fitting any different seats at a later date etc.
My Mac1 has circa 50mm flat plate, which at a guess is 5mm thick,running across the floor pans.
[Edited on 19/7/17 by CosKev3]
Good point - and I did mean to say 3x50 - that is what I have used. I have used the same runners linked at the top of this thread - and I positioned
the 50mmx3mm with the seat mounted up (loosely) - along with the steering column and pedal box too...
I think you need all those bits to get stuff right as a dry fit before you permanently make your fixings to the chassis.
My seats were GRP for Road Track Race - i think about £220 for the pair - apparently same moulds as used for Lotus Elise. Seem good to me - although
since being used to position chassis mount points they've been back in bubble wrap waiting for me to make progress...
[Edited on 19/7/17 by jps]
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the_big_1
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| posted on 19/7/17 at 11:30 AM |
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quote:
Originally posted by 40inches
You need to get the seats first, them fabricate the mountings to suit.
I used GRP seats, runners and 25mm box section.
Brake line
Seat base runners
Description
[Edited on 19-7-17 by 40inches]
Yeah I like the idea of box section as its not far off the same weight as flat plate as its thinner but as strong if not stronger.
What are the little raised parts for at each of the four mounting points for?
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CosKev3
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| posted on 19/7/17 at 12:54 PM |
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Check your seating height if you use box section, as 20mm extra height can make a big difference once sat in the seat
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40inches
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| posted on 19/7/17 at 01:18 PM |
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quote:
Originally posted by the_big_1
quote:
Originally posted by 40inches
You need to get the seats first, them fabricate the mountings to suit.
I used GRP seats, runners and 25mm box section.
Brake line
Seat base runners
Description
[Edited on 19-7-17 by 40inches]
Yeah I like the idea of box section as its not far off the same weight as flat plate as its thinner but as strong if not stronger.
What are the little raised parts for at each of the four mounting points for?
Strips of 5mm welded in to stop the box section crushing, tubing welded in would do the same job.
As Kev says, check the seat height. Although I have had to add 50mm spacers under the seat so that I could see over the scuttle
I'm 5'10" by the way, not exactly a short house!
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