Drivers Seat Position

[BOZ22N]

Hey all,

I am mounting my new OMP drivers seat and i have to make some mounts. I have to remove the std front mount as i am 6' 4" and the car is caged so i need all the head room i can get.

I am just wanting to know how much room you have between you legs and the bottom of the steering wheel and how far back do you have your seat? At the moment i have been running with 2" - 4" between my legs and the wheel and resting my wrists on the top of the wheel to get a judge for the distance?

Am i on the correct track?

Thanks for reading.

Ryan

[Duncan]

yep that sounds about right. I take it you are bolting it straight to the floor (no rails). Also the 32 wheel tilts and slides is 33 the same?

Assuming the wheel slides I set the seat so the pedals are a little close than normal driving (ie easily push clutch and throttle to the floor), then set the wheel a little closer than the normal "wrist with the arms straight" guide. i find sitting a little closer than normal for the road makes it a little easier to drive in anger.

you should consider fitting rails though, you may regret not having the flexability. Or at least a couple of bolt points on the floor.

[sav man]

The 33 wheel only goes up and down, and not in and out (or it's the other way round).

Do many people mount direct to the floor? I've just cut my factory mounts out, and put a bar from the sill to transmission tunnel, but it's a fari bit lower than the factory ones.

[No Crust Racing]

In the Silvia I mounted my seat in a similar fashion to Duncan, I'm pretty close to the wheel and using a fully fixed Velo Podium.

The high thorax support means I had to spend another few bucks on a quick release wheel to give some extra space on entry and exit. The Silvia doesn't have telescopic adjustment though.

My wheel sits about 2-3inchs above my knees and I can easily drape my hands over the wheel at the wrists, I'm only 6ft though so I can get away with being a little closer and not worrying about the roof line.

For reference, I also had to centre my mounts properly, I did use the factory seat holes but on a custom frame and the Velo mounts but we moved the seating position closer to the centre of the car when a plumb bob measurement showed the wheel to be off-centre to the seat in factory setup.

As Duncan mentioned, closed gives greater control, especially at the limit, on the condition you're not too close and getting all tangled up.

We played for ages with dummy fitting so it felt right for me. Downside is you have to be the exact same size as me and like my driving position to drive my car. Not such a bad thing in some ways though

[Victory]

Mounting a drivers seat in a R33 is a greater challenge than a R32 because there is no teloscopic function in the steering column. Both cars face the same issue with the four mounting points in the car being on four different planes.

We started with after market seat rails just to get the seat mounted in the car and to start to work out where it should go. The main issue is height becuase GTR seats have you sitting nice and low in the car with good clearance on the roof. The next issue is alignment and the need to move the seat as far as you can towards the middle of the car to provide enough room for the door to close and to clear any bar work that you have.

We are still not totally happy with our setup and I have even gone to the extent of obtaining a damaged shell to fabricate fixed base frames in and try ideas in until we can come up with something that is not a compromise.

Good luck with mounting your seat - it will not be easy.

[phunky_monkey]

Replied to your PM Ryan.

Also, you may want to speak with Jack (JAGR33). He is 6'4 like me and has plenty of room in his 33 with a Racetech seat.

[No Crust Racing]

I dunno how you fit in the 180 Dane, even mounted flat on the floor. Must be a squeeze with the helmet on?

[phunky_monkey]

I actually sit a little too low now, which is hard to believe! I had the rails cut out of the floor and reinforcements added, so now my shoulder only comes up to the top of the door so I ahve heaps of room. It used to be a bit of a squeeze even with the Bride rails, but now I wouldn't want to be any lower.

[No Crust Racing]

That's some serious fab work to mount a seat

[phunky_monkey]

Yeah, it wasn't cheap either

This may give you an idea of it's height.

[No Crust Racing]

That's awesome, nice and low.

Love the shuttle command centre console too

[Bazil_1]

Hey Ryan,

I run an OMP WRC in my 33 GTR and am 6'3". Due to the roll cage running directly above my head i've had to run the seat as low as possible for helmet clearance . Mines bolted to a 30x30mm square steel tube which i made up to run between the seatbelt side rear mount and the door side and made some mounts for the front out of 5mm flat bar. I have the front of the seat (not the removeable cussion) sitting just forward of the front left mounting (when looking from drivers view) and the pedal reach seems perfect though the wheel is about 20mm too far away (though being taller this might help)

The 33 has a tilt adjustable steering wheel but does not slide forward (well atleast in s1 GTR).

Here's my seat, sorry i didn't get pics of the mounting when the seat is off, spewing i didn't now as it would have helped in the future.

I'll be looking for a dished steering wheel or a longer steering hub once it is off the road for good and won't need ABS for legal reasons (is disconected at track though).

[Duncan]

excellent point about the boss....the quick release I have puts the wheel 10cm closer as well, you almost certainly want one so remember to take that into account. and you will love how hard it is to find the indicators after you have fitted one

[BOZ22N]

Thanks Liam,

It is hard to picture what you have made but did you keep the factory front seat mounts, or did you cut them out?

Thanks for all the replies guys.

Ryan

[Bazil_1]

Yeah it's using all of the original bolt holes in the body, though the seat belt one has been retapped to take an 8mm (i think?) bolt. I'll try draw up a basic diagram in paint to give you a general idea

[Bazil_1]

Found a photo of the seat side mounts bolted up to the car without the seat today so i edited it to show how i made the mountings.

The ass of the seat sits bellow the square tube at the rear to let the seat get as low as possible. I will be raising it up on my side mountings though as it is a bit overkill in the low department and want a straighter back position.

There are probably easier ways to do this if you have a 33 seat you can steal the mountings from and weld them to the side mounts but this works. I've used 5mm flat bar where needed and hi tensile bolts everywhere to ensure strength.

[BOZ22N]

Thanks Liam, I will see what i can fab up.

Yours looks very tidy, My problem i had what the front lip of the seat fouling on the std front seat mount cross member.

[No Crust Racing]

I used all factory bolt holes in my setup and made up a frame for the Velo mounts to sit on. I braced mine front and back as well, it's nice and rigid.

[MBS206]

My biggest issue was clearance when bringing the seat forward...

I'm bolted dead to the floor... The stupid factory hump gets in the way... But it seems nearly perfect for me...

When the cage gets done, I'll move it closer, and lower, and cut the hump out...

The other issue I had was with the shoulder wings smashing the door...