Seat fitting - RTR GRP seat

[jps]

Apologies if this is in the wrong place, I have signed up here simply for this advice so am not familiar with the forum.

I am building a Haynes Roadster, but chose to buy the GRP seats that RTR used to supply (I bought the seats about 4+ years ago now). They are shown in a lot of photos of MEV builds (I believe they are based on the Lotus Elise seat - i.e. these seats:
), in fact that image comes from this thread on here: mevowners.proboards.com/thread/5553/brand-new-rtr-seats-sale


They are a bit unusual in that there are two mounting holes at front of the seat through which I can bolt down towards the floor, but two, partway up the back, which come out facing backwards.

Can anyone offer advice (and pictures!!) on how they have fabriacted suitable mounts for these seats?

Thanks in advance
Cheers
John

[nate78]

I can't remember who's thread it's in but there are photos or at least was untill the issues with photo bucket started, if I remember correctly the brackets were a folded strip of flat bar, I.e 5mm x 30mm

[jps]

Thanks Nate, just reposting to bump this up incase anyone else can add anything/anyone knows which thread it was...

[Stiggy]

the original seat mould came from Lotus, we supplied it to RTR who used as is and so bolts are exposed. MEV made mods to make the seat wider and bonded in steel to the back for strength and fixing.
Here is a picture of a Lotus Elise seat bracket used in an MX5.
link

[jps]

Stuart, thanks for posting, I appreciate the help.

I'd already started with a bar across some runners, similar to the front mount, I've also assumed I need to fix via holes in the two indents in the back of the seat , so would it be right to add to that pictured subrame a couple of 90 degree brackets at the rear to pick up those mounting points? Pics below may illustrate what i'm thinking better..

Thanks
John










upload photo on web

[mawdo81]

Looks good to me, although I'd fillet the new brackets to transfer the loads better.

[turbo2015]

Im seeing alot of grp seats being used in kitcars, are they really uncomfortable

[mawdo81]

First and foremost they’re light weight! Secondly, you need support as you’ll know from your vx220 days, so if a mould suits you you’re fine. Many go for a thin (5-10mm) layer of closed cell foam to take the edge off.

[carlyd]

I had GRP seats in my rocket with no padding at all and they were very comfortable.
Although I tried the same seats in the pics on this thread and couldn't get I disagree/back into them. 
I had mine custom made, the guy I used (Karl) added a 4 inch strip down the middle effectively making them 4 inch wider.
They were a little too wide to be honest but very comfortable.