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R2 Racing
09-01-2005, 07:46 PM
The rule book stats that any three layer suit or any suit with a SFI 3-2A/5 rating or higher, does not require the use of underwear. A buddy of mine is looking at buying a Simpson STD.19, two layer, one piece suit that claims a rating of "SFI 5". So can anyone tell me if that SFI 5 rating is considered a higher rating than the SFI 3-2A/5? Basically, would it be legal to use without underwear underneath? Thanks for the help!
Marcus Miller
09-01-2005, 11:54 PM
Originally posted by R2 Racing@Sep 1 2005, 04:46 PM
The rule book stats that any three layer suit or any suit with a SFI 3-2A/5 rating or higher, does not require the use of underwear. A buddy of mine is looking at buying a Simpson STD.19, two layer, one piece suit that claims a rating of "SFI 5". So can anyone tell me if that SFI 5 rating is considered a higher rating than the SFI 3-2A/5? Basically, would it be legal to use without underwear underneath? Thanks for the help!

59536


I believe that's marketing shorthand for 3-2/A. It would be legal sans underwear.

Marcus
Daryl DeArman
09-02-2005, 12:22 AM
Marcus is correct. 3.2a/5--no underwear required (BUT IT IS AN EXTREMELY GOOD IDEA) The SFI 3.2a section pertains to the suit test standards. The suffixes /1, /5, /10, /15 indicate what the highest level test they are capable of passing. Simpson makes it fairly easy to determine the performance of their suits my using model numbers with what they claim that suits TPP rating is. The 19 TPP is good for about 9.5 seconds before you will sustain 2nd degree burns from heat transfer. Nine and a half seconds, not ninety five....think seriously about a set of CarbonX underwear.
R2 Racing
09-06-2005, 11:18 PM
Thanks for the replies, guys!
RacerBill
09-07-2005, 07:04 AM
Originally posted by R2 Racing@Sep 6 2005, 11:18 PM
Thanks for the replies, guys!

59768


Kevin: Got an email or phone num.?
jc836
09-07-2005, 07:32 AM
This is the suit I wear. YES, you don't need to wear the undies and it is SFI tagged accordingly. On the otherhand-I wear COTTON undies under mine. Some will argue the merits of my choice over Nomex (which I do have and wear on ocassion).
R2 Racing
09-07-2005, 09:04 AM
Originally posted by RacerBill@Sep 7 2005, 06:04 AM
Kevin: Got an email or phone num.?

59786


kevin @ ruckracing.com

(take out the spaces)