Racing Harness

Viper4

Viper4

Member
Hi, I have searched the forum but I am unable to find any info on fitting a racing harness. I know that there must be owners who have fitted them , especially if they track their car seriously and or race, but I am unable to find details.

I have searched other forums/internet but other then full blown race prepared cars there seems to be little to no info. I have seen/read forum threads about track day cars and yet dispite all the upgrades..they all still use the OEM seat belt.

Has any one fitted a race harness or has info /links , I would be very greatfull :)
 
So no-one has fitted a racing harness to their Z4 ?

Okay this may not be the best place to ask for such info , but I would have thought that anybody who 'tracks' their car would have considered /fitted a racing harness., or perhaps could recommend someone.

I have slowly pushed the car since I bought 'her', and there is definitely one thing that I would like to 'update' in order to vastly improve the driving experience when 'pushing' the car to the 'limit'....and that is the slopping around on my slippery leather racing seats on country roads with nice go for it bends, and roundabouts.

My car has the M sport racing seats, which are great but the issue is the restraing harness !

Fitting a '5' point harness would be a huge improvment in the driving experience, not only on track but on nice country roads , when the oppertunity arisese :)
 
I simply put in better seats in my Z4MC...Recaro Pole Position ABE in Black Ambla & Alcantara...and the combo if a much better seat (better thigh/hip/rib support) means the standard 3-point belt is fine for trackdays & fast road.

The racing harnesses I have seen fitted have usually bean attached to a roll-cage or rear tower bar...but I'd not use them in a road car.

The posts below refer to e85/e86 Z4s, but similar options (seats/rollcage/harnesses) must be possible for the e89...not that I've seen any outside of proper motorsport cars...maybe the folding metal room restricts what can be fitted to road cars (i.e. no space in boot for strut bar, and no space anywhere for half-roll-cage?
www.bimmerfest.com

Z4 Mcoupe Roll Bar and Race seats installed

My wife got me the best birthday present so far. She arranged for me to have a roll bar and race seats installed in my 2007 M coupe. She had the work done at Tri-Point Engineering since they are close to my house. They used to work with TC Kline on BMWs for racing so they were set up to do...
www.bimmerfest.com www.bimmerfest.com
 
If you want to do it properly, I suggest you look at the UK Motorsport National Competition Rules 2026 (formerly the Blue Book) Chapter 7 and appendixes 7 and 13, diagrams 49-52. There are also other references in the book. However, it can also be possible to use the existing seat belt mountings if in the right place, though that would mean removing the existing belts. Shoulder straps can also be fixed to the roll cage if the right angles can be achieved. For what its worth, I would have thought having to use 4, 5 or 6 point belts day to day would be a right pain! Fitted properly, you can't move in the seat. I know some rally cars have the standard belts and the harnesses both installed so they can use the ordinary belts for road sections. The harnesses will be on their own specific mounts as the regs.
 
i have them fitted to my race only e86. I would not recommend them for any road going car, nor would i do such a thing with a "harness bar". Safety devices need to have safety in mind first and foremost. stick with existing seat belts unless you want your car off the road and track only.
 
Spriteracer said:
If you want to do it properly, I suggest you look at the UK Motorsport National Competition Rules 2026 (formerly the Blue Book) Chapter 7 and appendixes 7 and 13, diagrams 49-52. There are also other references in the book. However, it can also be possible to use the existing seat belt mountings if in the right place, though that would mean removing the existing belts. Shoulder straps can also be fixed to the roll cage if the right angles can be achieved. For what its worth, I would have thought having to use 4, 5 or 6 point belts day to day would be a right pain! Fitted properly, you can't move in the seat. I know some rally cars have the standard belts and the harnesses both installed so they can use the ordinary belts for road sections. The harnesses will be on their own specific mounts as the regs.
Click to expand...
I have harnesses and standard three point inertia reel belts in my Exige. The harnesses are a PITA on the road, especially when pulling out of a T junction.
As a compromise, I use CG Locks in all my cars. It locks the lap belt portion of a standard safety belt so that it is a fixed static belt, whilst leaving the sash portion functioning normally. Unfortunately, the company stopped making them 5-10 years ago.
 
I'd send a DM to Ed Doe as he has 4 point harnesses in his M Coupe to got with his Tillett carbon seats.

Or maybe Liam22 as he must have them in his 3 litre Coupe race car.
 
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