Harness Mount Location 84 Carrera

[NoLift911]

Question regarding mounting to the inboard stock seat belt anchor with an eye bolt?
I have a welded in roll bar and gutted interior, have read for the outboard the stock anchor point is fine with an eye bolt - there seems to be discussion regarding the inner mouting location?

For 6 point harnesses is it ok to use the inboard stock mount (with eye bolt) with Recaro PP shells?

Thanks -

[Bill Verburg]

Originally Posted by P-Dawger

Question regarding mounting to the inboard stock seat belt anchor with an eye bolt?
I have a welded in roll bar and gutted interior, have read for the outboard the stock anchor point is fine with an eye bolt - there seems to be discussion regarding the inner mouting location?

For 6 point harnesses is it ok to use the inboard stock mount (with eye bolt) with Recaro PP shells?

Thanks -

The geometry of the belts is critical to their functioning properly.

Read the installation instructions and follow them
Schroth has complete instructions and specs that can be downloaded here

but the short answer can be seen in this pic

[NoLift911]

Thanks - yes I read that. Mainly the HMS site.

My questions was regarding the oem seatbelt anchor locations and using eyebolts for them. The inboard specifically and it's suitability as a point of anchor. As I read it, via discussions on the board there seemed to be some confusion as a suitable anchor point.

[porschenut]

I used eye bolts for all 5 harness mounting points, and the PCA tech inspection nazis in my region have never made a comment.

[Esel Mann]

P-Dawger,

This is an interesting as well as timely (for me) post!

From Bill's post of the link to the referred document, the eye bolt in and of itself is acceptable for a Schroth harness so long as it meets the requirements from page 19.

However check out page 12 and 34 of referred document which Bill supplied. For the lap part of the belt it provides additional mounting criteria. Mainly spacing and angle. Which of course is somewhat confusing with respect to spacing. Firstly they recommend the spacing between lap belt anchor points not be greater than the occupant's pelvis or the outer width of the occupant's bucket seat. Then they say 16" approximately is recommended. Finally they say choose anchor points that come closest to these recommendations. WTF???

My pelvis width < my bucket racing seat width < the stock mounting point width.

I can also say though, all of the above are > 16".

But, take a look at pages 35-42, in particular page 40.

It would appear that (a) stock mounting holes are acceptable and (b) the confusion comes about if you use (like I) the bolt in type harness brackets as opposed to the carabiner type (which uses the eye bolt which is what you are using).

If a bolt in type harness bracket is utilized, the bolt in type harness bracket needs to be custom bent to put the load on the bolt and not the bracket. The custom part is due to mount spacing and relative seat orientation as well as the seat itself. With an eye bolt carabiner solution such as your's, so long as the eyebolt is installed correctly, it "already bends" to the proper orientation. Hence the stock mounts are acceptable. Naturally per Schroth the closer to just under your pelvis width the more "optimal".

I see 2 things from this which are not right about my setup(my harness was installed by a shop and not me). Firstly, I need to bend those lap belt bolt-in brackets (mine are currently stock straight mount with the bolt-in brackets for the lap belts) for proper orientation! Second, for my shoulder belts they go through the seat over the harness bar (not wrapped!) and down to the rear seat seat belt mounts. Mine are not crossed. The document recommends for distances greater than 500mm to cross them.

I certainly would like to hear from others (Bill at least) if my interpretation of the mounting width confusion may be due to the subtle difference between the bolt-in bracket and the eye-bolt carabiner bracket options.

[rattlsnak]

yes, i have always used the stock mounting positions for the lap belts and always pass tech...

[NoLift911]

Originally Posted by Esel Mann

P-Dawger,

This is an interesting as well as timely (for me) post!

From Bill's post of the link to the referred document, the eye bolt in and of itself is acceptable for a Schroth harness so long as it meets the requirements from page 19.

However check out page 12 and 34 of referred document which Bill supplied. For the lap part of the belt it provides additional mounting criteria. Mainly spacing and angle. Which of course is somewhat confusing with respect to spacing. Firstly they recommend the spacing between lap belt anchor points not be greater than the occupant's pelvis or the outer width of the occupant's bucket seat. Then they say 16" approximately is recommended. Finally they say choose anchor points that come closest to these recommendations. WTF???

My pelvis width < my bucket racing seat width < the stock mounting point width.

I can also say though, all of the above are > 16".

But, take a look at pages 35-42, in particular page 40.

It would appear that (a) stock mounting holes are acceptable and (b) the confusion comes about if you use (like I) the bolt in type harness brackets as opposed to the carabiner type (which uses the eye bolt which is what you are using).

If a bolt in type harness bracket is utilized, the bolt in type harness bracket needs to be custom bent to put the load on the bolt and not the bracket. The custom part is due to mount spacing and relative seat orientation as well as the seat itself. With an eye bolt carabiner solution such as your's, so long as the eyebolt is installed correctly, it "already bends" to the proper orientation. Hence the stock mounts are acceptable. Naturally per Schroth the closer to just under your pelvis width the more "optimal".

I see 2 things from this which are not right about my setup(my harness was installed by a shop and not me). Firstly, I need to bend those lap belt bolt-in brackets (mine are currently stock straight mount with the bolt-in brackets for the lap belts) for proper orientation! Second, for my shoulder belts they go through the seat over the harness bar (not wrapped!) and down to the rear seat seat belt mounts. Mine are not crossed. The document recommends for distances greater than 500mm to cross them.

I certainly would like to hear from others (Bill at least) if my interpretation of the mounting width confusion may be due to the subtle difference between the bolt-in bracket and the eye-bolt carabiner bracket options.

Thanks - I think there was some confusion(rather my confusion) from what I read here that cars (not sure of the year spread) did not have tunnel mounts installed on the "tunnel" but rather the seat rails...so when you swap seats for shells or other and use different rails - there goes your mount. I understand that there is a (I think 964 part number) for a bracket that mounts to the seat rail.

The OEM locations for anchors seemed logical to me - just wanted to make sure they were strong enough without any reinforcements. About the only issue is the length of the eye bolts interfering on the tunnel side with each other when both used - they just need to be shortened to accommodate driver/passenger harnesses.

[Bill Verburg]

I Guess that I'd either drill holes and mounts pad eyes or use the mounts from Carrera manual seats, then if the stock 3 pointers are retained use a dual arrangement similar to that used at the sill
Carrera manual seat mounts, #16 is 928.521.065.02


the 964RS used a similar setup, #24 is 964.521.065.00, this is what I used in my car for the stock 3 point belt mount, w/ pad eyes as specified below for the RS/Cups


The 964/993Cup harness mount locationss are specified here

[proffighter]

Here is my harness, fitted according Schroth using stock rear mounting points:



Sorry for the bad pic.

[NoLift911]

This is the mount I am talking about:





I just need to shorten the eyebolts so I can get one on each side.