Mike in CA

Don't mean to horn in, Larry, but to answer the question, if you get those 4pt belts you won't need the sub bar that mounts under the seat. You'll need everything else.

Jake951

I have the Porsche OEM harness with GT2 sport buckets. I'm pretty sure the Porsche harness is actually made by Schroth. Mine came with 3" shoulder belts and I ended up replacing them with 2" Schroth shoulder belts for use with a HANS device, although I understand 3" belts are OK, too, for HANS. I got just the shoulder belts from HMS Motorsports. I have the RSS bolt-in roll bar with the B-K sub bar and it all works nicely.

Mike in CA

+1

Larry Cable

I *think* there is another significant difference between the Porsche "Schroth" belt and the "generic" Schroth belts worthy of discussion!

I believe that the Porsche version has, sewn into the lap belts, an eyelet that is intended to bolt to the seatbelt mount on the transmission tunnel side, and to the seat (or seatbelt mount on the door sill) on the door side.

these eyelets are no removable.

If you want to be able to clear the lap belts out of the car when not tracking, if you use the "generic" Schroth belts you can also use clip-in attachments from BK to make the lap components removable.

This is not the case with the Porsche version.

Of course, the clip-in style may not be approved by the body with which you track ...

just, fyi.

Larry Cable

honk honk!

alexb76

Thanks... so, which is more flexible then? Seems like the Schroth, right?

Larry Cable

they are both "Schroth" one is the generic, and the other is specifically made for Porsche GT3 ... but the generic is a little more flexible...

taffin

the Schroth has a rotary dial type release whereas the Porsche has a push button type.

I like the rotary type as in an emergency I think it is easier to use.

Also I would recommend getting the HANS specific Schroth, if you going to the expense and trouble of the seat etc, spend the extra $ and make sure you get a HANS as well.

alexb76

Isn't HANS just too much? for DE events on a Carrera 4S?

taffin

I don't DE but track, as I only have one head, I do not find it too much.

ir_fuel

Depends on the car.
My GT3 came from the factory with Porsche belts with a rotary dial type.

Dr.Bill

You can't just think in terms of individual items - think of the entire safety system.

For me, there are three options:
- use the stock seatbelts with the airbags and all the other mandatory factory items.
- use the 4-point ASM belts (if approved by the organization). These allow the body to flex and rotate just as the stock belts do. Therefore, no roll bar is needed. A HANS or similar will add to the system.
- use 5 or 6 point restraints in conjunction with a roll bar (at a minimum, a cage or half cage is better) and HANS. If you go with this system, the Schroth GT3 specific belts are the easiest to use.

rubber_ducky

How is it that the 4-point ASM belts allow you to bend in a way that the 5/6 points don't? I can see how they might allow you to submarine yourself, but I can't see that happening (unless it's unintentional) while going shiny-side-down.

Dr.Bill

That's the way they are designed and why they must be installed correctly - they come in 'right' and 'left' versions. There is an 'energy converter' in the inboard shoulder belt that allows that belt to stretch and your body to rotate.

From the Schroth web site:
The patented SCHROTH asm system offers an unique safety advantage for 4-point harnesses. asm is the acronym for anti submarining. The risk to submarine (sliding underneath the lap belt), a well known phenomenon during frontal impacts, is significantly reduced by the asm safety system. The energy converter is located in the inboard shoulder belt. Therefore make sure you purchase left and/or right harnesses. Severe injuries or death are possible using 4-point harnesses without the SCHROTH asm safety system or an anti-sub strap. SCHROTH harnesses designed for use on public roads (FE push button models) or those likely to be used as 4-points come with the asm safety system. The performance of the SCHROTH asm safety system has also been positively tested in conjunction with airbags.