Technical > Roo Man's Room
Chassis building to a Spec.
George:
As I read some of the chassis being built or modified, I don't see a reference to a SFI spec. or possibly another standard. Am I mistaken or are there a good percentage of builds that never get inspected? Is it only sanction tracks that require a current chassis cert. ? I would think even a non-sanctioned contest should have to meet some requirement for insurance reasons. Just curious. George
GlennLever:
If nothing else I would think you would want to get it inspected just for your own piece of mind?
tylercrawford:
--- Quote from: George on May 30, 2013, 02:21:32 PM ---As I read some of the chassis being built or modified, I don't see a reference to a SFI spec. or possibly another standard. Am I mistaken or are there a good percentage of builds that never get inspected? Is it only sanction tracks that require a current chassis cert. ? I would think even a non-sanctioned contest should have to meet some requirement for insurance reasons. Just curious. George
--- End quote ---
Can't tell you on the majority of guys out there but if its slow enough, then obviously it doesn't need a chassis inspection which is why you see the flathead guys tend to run whatever they want and keep it much more 50s themed.
My frame is done to 2.4C sfi spec and the book was really the only "blueprint" I had. Cacklecars don't build to spec other than what is period correct and more often than not it seems a lot of the local nostalgia races have little tech. Very very few cars comply 100% with the NHRA rulebook but most at least adhere to the chassis spec if they are actually going to be raced.
George:
How slow is slow enough?
tylercrawford:
--- Quote from: George on May 31, 2013, 10:35:01 AM ---How slow is slow enough?
--- End quote ---
NHRA rulebook 4:11 under roll cage heading says 9.99 or 135mph or faster
http://www.nhra.com/UserFiles/file/General_Regulations.pdf
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