Tillet seats and crotch straps.

[magnusfeuer]

Yesterday I started fitting the my Tillet seats and ran into trouble with the crotch strap.

The strap starts at the lap belt mounts, goes under the Tillet seat and through the hole where your private Seven (inches) has a tendency to fall down when you are driving naked.

I tried to pass the strap from its seat belt mount, between the runner and the seat (which are separated by a couple of spacers and through the hole. The problem with this is that the bracket used to adjust the strap gets all bunched up between the seat belt mount and the seat itself.

Should I try to move the bracket so that it resides under the seat on the part of the strap that is between the runner and the hole, or is there a smarter way of routing it?

/Magnus F.

[slomove]

From the Schroth instructions. But it may require a separate mount for the crotch belt.

[Elv15]

Magnus,

On my car there are separate mounting points for the crotch straps. You have to remove the seat and you should find some tabs that come off the chassis frame and face forward. They are attached to the lower frame member that the bulkhead attaches to. The bolts go through the floor pan. See the pic here:

http://pierats.com/gallery/howlowcanugo/DSC01510

I would place the adjusters somewhere you can reach them in case they need to be changed. You don't want to take the seat out to adjust them!

Tom

[magnusfeuer]

Thanks Tom!

I always wondered what those were for. The assy manual, however, states that the crotch strap should be installed at the lap belt mount. But since the rear tabs are an obvious solution, I'll try them tonight.

/Magnus F.

[sdcat]

I have the Caterham kevlar seats, and had an issue with the rails of the seats coming too close to the crutch mounting brackets to use them. I ended up securing the crutch straps to the seat rails, which although is a significant compromise, was more secure than my other options. Your rails might clear the brackets. Funny that the Caterham racing seats don't allow clearance for their own crutch mounting points!

Justin

[mopho]

Magnus,

On my car there are separate mounting points for the crotch straps. You have to remove the seat and you should find some tabs that come off the chassis frame and face forward. They are attached to the lower frame member that the bulkhead attaches to. The bolts go through the floor pan. See the pic here:

http://pierats.com/gallery/howlowcanugo/DSC01510

I would place the adjusters somewhere you can reach them in case they need to be changed. You don't want to take the seat out to adjust them!

Tom

That is how it is mounted on my car as well

[athens7]

So that's what those mounting brackets are for! I always thought they were just there so gravel would have a nice place to hide from my vacuum. Has anyone mounted crotch belts for use with the standard Caterham leather seat? I would love to go to an HPDE, but cannot without the crotch straps.

[magnusfeuer]

I had the crotch strap mounted at the lap belt mounts using the standard cloth seats. It was a bit tight, but you could still adjust everything.

/Magnus F.

[Doug Liedblad]

athens7

I have my crutch belts mounted that way, you run them on top of the seat bottom, not underneath.

Only one inspector ever questioned it. My response was they are all like that and I was good to go. I've run in many NASA HPDE events.

It would be better if they had a fixed mounting point as in the diagram but you can't do that with the stock seats. When I get around to making a foam seat bottom I'm going to pop some of the rivets from the cross bar just in front of the seats and try to route the belt under it and see if that will work.

An alternative might be to wrap the belts around this bar, I've not tried it yet so don't know if there is room.

I seem to remember reading that the crutch belt should not be mounted to the same anchors as the seatbelt but I don't remember the source.

Doug

[athens7]

I'm struggling with my spatial visualization-can one of you please post a picture?

[Doug Liedblad]

[ATTACH]809[/ATTACH]

[magnusfeuer]

Doug needs some more training with the Internets.

/Magnus F.

[Rod]

"Has anyone mounted crotch belts for use with the standard Caterham leather seat?"

I use the crotch straps with the Caterham seats. They work fine.

[GWise]

I seem to remember reading that the crutch belt should not be mounted to the same anchors as the seatbelt but I don't remember the source.

It all depends...

Here's schroth's instructions. (page 16)

http://www.schrothracing.com/docs/Competition_Instructions.pdf

The profi F model uses the same anchor points as the lap belt. I would contact schroth directly. It would seem since you're sitting very close to the lap belt anchor points, you could just set it up like a Formula car where you sit on the anti-sub belts.

[athens7]

Thanks for the picture, Doug. It sure appears that with no forward hard pivot point for the crotch belt, the pressure point in case of sudden deceleration would be, well, one's junk. How comfortable is this arrangement in practice? It seems the choice here is between submarining and castration(?!).