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Like he siad if you run any non NHRA track nobody will look. RM
 

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Discussion Starter · #5 ·
Thanks, I have gone 5.71 in the 1/8th running a 1/4 pass, but my car is still slipping the tires. Thought I would make a bunch of 1/8th mile passes and work on the traction.
 

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The 1/8 SFI rating shouldn't be determined as a calculation of ET at the 1/4 mile . In case of an accident the forces and energy on the roll cage at the 1/8 mile based on ET are nowhere near what they are at 8.50 at the 1/4 mile. The chassis rating should be based on speed at the 1/8.
 

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The energy is in the speed, not the ET. Most 8.50 cars run between 127 to 130 in the 1/8 and 155 to 160 in the 1/4. Why wouldn't the same cage be safe at 150 in the 1/8? Isn't that the point of running a 1/8 mile, to develop less energy because of the heavy 10.5 cars?
 
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