Attention all T-Top cars
09-10-2003, 12:28 PM
#121
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Re: Attention all T-Top cars 10.99 has always been the default for a rollcage...if the firewall/floorpan has been unmodified...it has always been acceptable down to 9.99 for HARDTOPS. That NHRA post said that T-tops will remain classified as hardtops 
09-10-2003, 12:31 PM
#122
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Re: Attention all T-Top cars From NHRA.com:
A roll bar is required in any convertible running 13.99 seconds or quicker in the quarter mile, and in other cars beginning at 11.99. The roll bar is accepted in vehicles running as quick as 10.00 second e.t., provided the stock firewall and floorboard is intact, other than for installation of wheel tubs...If the floor and/or firewall has been modified, then a full roll cage is required beginning at a 10.99 e.t. A full roll cage is required in any vehicle running 9.99 seconds or quicker, and any vehicle running 135 mph or faster (regardless of e.t.).
A roll bar is required in any convertible running 13.99 seconds or quicker in the quarter mile, and in other cars beginning at 11.99. The roll bar is accepted in vehicles running as quick as 10.00 second e.t., provided the stock firewall and floorboard is intact, other than for installation of wheel tubs...If the floor and/or firewall has been modified, then a full roll cage is required beginning at a 10.99 e.t. A full roll cage is required in any vehicle running 9.99 seconds or quicker, and any vehicle running 135 mph or faster (regardless of e.t.).
