I have been told yes by some and no by some.
I cant find anything in the handbook about this....

 

This is what I found.

On all cars requiring a roll cage, if the OEM firewall has been
modified (in excess of 1 square foot for transmission removal, not
including bolted in components) a lower windshield or dash bar of 1
1/4 x .058-inch 4130 chromoly or 1 1/4 x .118-inch mild steel is
mandatory connecting the forward cage supports.

 

correct, and as for the window net...if you need a roll cage, you need a window net

 

yup.....

 

and be sure window net tabs are mounted center line of pipe, or inside of pipe on driver side, not supposed to be mounted on outside, incase, door flys off, car rolls, could rip off tabs, and rip of net. Just what the local nhra inspector told me.

goodluck!

 

Old thread but if this is true then you need a window net installed AND up when running 11.49 or faster? I heard you only need the window net UP if you trap 135 or faster...?

 

a 6 pt is called a "roll bar". 10 pt is a "cage"

 

^^^
This. Rollbars take you to 10.00

 

Or 135mph, right?

That's the thing with fi cars, we will exceed the mph cutoff before the et

 

So trap does not matter and i only need it UP for 9.99 or faster?

 

If you have a cage, net needs to be up no matter what et or mph you run.

 

Trap speed defiantly matters to the NHRA guys, we got booted many times for mph (when the car had a 6 pt). we even tried just running the car out to the 1/8th so we wouldn't break the rules. Turns out there is an 1/8th mph limit as well and we were braking it.

 

9.99 OR 135mph requires a "cage" which also means a window net.

 

If the date's are NOT whole punched does that mean the window net is not legal?

 

Window nets do not expire. Last year, nhra came out with a rule amendment stating they have to be renewed every 2 years (just like harnesses) but they threw it out the window mid last year

 

I have a SFWD i am building. I have spoke with a NHRA tech who walked me thru the specs of the cage needed for my build.

A dash bar is not mandatory if you are running the factory firewall (non modified).