I have searched the forum to see if this has been addressed, I cannot find a response to this topic. So, here goes , Page 52 of the 2019 rule book, section 3-X ," SFI TYPE blower restraints shall be used on all vehicles using positive displacement Blowers" OK, that's fine , but since no mention of SFI spec numbers are given ,It seems to leave open another Gray area. So , can I build something in my shop that resembles a SFI type system and be legal to run ?
I have done my Homework and found a good picture of a SFI Rated system in a drag racing catalog.
Thanks .