PCA SDR

I picked up a car recently that has been prepped for autocross and I would like to do some TT's with it, including Chuckwalla in March. The car is equipped with a rollbar and an aluminum Kirkey race seat. The belt on the driver side has been upgraded to a G-Force 4 point "tuner" belt (see link below). It is obviously an improvement over the 25 year old 3 point harness but is not SFI certified. The required safety equipment spreadsheet states "seatbelts, factory or better; properly installed Scroth ASM 4-point harness". The G-Force belt is better than factory so it appears to be legal but I'd like to confirm that and not leave it to chance. Thanks.


http://www.gforce.com/products/harness/9000.php

Regardless of legality, non-ASM 4pt belts are extremely unsafe. Two people died at Chuckwalla in 2014 in part because they were using 4pt harnesses.

For Time Trial and DE, five or six-point harnesses are required for all drivers and
passengers running 200 Performance Equipment Points or higher and are strongly
recommended for all entrants. Also, the same type of restraint system is required
for both driver and passenger. 5 or 6-point harnesses are allowed at Autocross
events, but they are not required.

ScandinavianFlick wrote:Regardless of legality, non-ASM 4pt belts are extremely unsafe. Two people died at Chuckwalla in 2014 in part because they were using 4pt harnesses.

I'm aware of that accident. One person died, the passenger, when they hit a cornerworker station:

http://www.ocregister.com/articles/trac ... unday.html

The only 4-point belts allowed by the rules are the Schoth ASM belts, as they have an extension patch on the inside shoulder that allows elongation on impact to mimic the action of a factory three point. This system has been certified to prevent the "submarining" that occurs with regular 4-point harnesses. But they are only allowed as an option to the factory belts.

As Jay correctly points out, any car that has more than 200 Performance Equipment points must have 5- or 6-point harnesses subject to the mounting and inspection guidelines called out in the rules. This also applies to non-Porsches running in DE/TT events. The following worksheet may be used to determine if an X-car would require additional safety equipment such as 5- or 6-point harnesses:

http://www.zone8.org/assets/docs/DE_TTSafetyEquipCalculator.xlsx

Got it. I'll replace the 4pt with a 6pt before the event. Thanks.

Remember - if you use a 5 or 6 point system,, the seat must come from the manufacturer with any required cutouts for harness routing.