I have wanted a bucket seat in my
car for absolutely ages now. After picking up a Corbeau Sprint for
a good price at Autosport it wasn't going to be long till it was
Corbeau Sprint in Kevlar/GRP
Question was though, how to do it?
I had a pair of Sparco sidemounts to bolt on, but I was fairly
keen on finding a way to put the sidemounts on the standard
runners as Mark has a need to drive the car now and again, both on
road and on track.
The first thing to do was to see
how the new seat measured up on the width of its runners in
comparision to the stock MR2 seat.
Pic of original seat and steering wheel
We found that width of track where
the sidemounts were was about 50mm too narrow.
Sidemount on seat.
Mark found the answer to this
problem though, by having the sidemounts the other way they were
in 5mm of the desired track width. We already had a set stock
slider rails from one of Mark's old seats, the idea was that we'd
use Mark's latest toy (his new welder) to weld the sidemounts onto
the original seat runners.
Reducing the height of the sidemounts
as they fouled on lapbelt guides
Original seat runners ground down and
paint removed in prep for welding
The first job was to grind down
the runners so as to ensure that there was a flat surface to weld
too. We decided to weld 'spacer' plates on both rails as one had
some raised metal work (one on right) in order to present a flat
surface for the sidemount base to weld to.
Sidemounts with paint removed
Sidemount ready to be welded to the
Seat with one sidemount with OEM
slider welded to it.
OEM runner on sidemount
Notches were cut out of the left
sidemount to allow the slider mechanism to operate and ensure the
correct width was attained for the runners
Seat installed. New Sparco wheel can
be seen here
Pic showing seat with 6-Point harness
Pc showing how side mount was welded
to the rail
As can be seen here there is now a
lot of room behind the seat! FIA (stamp can be clearly seen)
Seat installed! Sparco black suede
steering wheel and 6-point harness completes the effect
We did a number of trial fits on
the mounts and checked our measurements a number of times mainly
because once the welding was done we couldn't undo it. Fortunately
everything fitted spot on, first time. One issue with turning the
sidemounts round the other way is that it does limit how low you
can fit the seat. Driving the car back from the workshop with just
the four-point harness on (am not wearing 6-point for the road) it
felt like the car's suspension was stiffer, though it was of
course the benefit of a rigid seat with no springs in
More to come, once I get a
chance to get some pics in daylight!