pon Seeing Vinny's new edition (Looks very nice btw). I have a question.

Why do you have to run the bars out the back window? Infact why do you have to run them out of the back of the cab at all?


Can't you just run the bars straight down (following the rear corners of the cab)?

I thought you only needed it to run it out the back on an angle if you had rear seats. Like in the rear of a mustang.

Can someone post the rules which dictate that a roll cage MUST go out the rear of the truck into the bed to be legal.


Thanks.

 

Out the back get's you your six mounting points.

 

I have to agree with 1-menace, I read some where also that the out the back window rule was being challenged in the NMRA rules. For that very reason we do not have a back seat.


Suavy

 

Rob02,

Keep us posted as to what your friends say about the Rule and whether a clarification was issued, regarding our trucks.

 

Check out the rule book at www.scca.org ... There is an
exception for using a forward facing "Petty" bar that goes from
the top of the roll cage to the frame on the passenger side.

The car they mention is a Honda del Sol ...

After seeing the Mustang roll on track last year, the only thing
that I want is a FUNCTIONAL roll cage.... That mustang punched
his right through the bottom of the car ... dayum unibody construction.

I would like to know if anyone has USED the Lightning roll BAR
yet. It isn't a CAGE, but I think some of them are more for passing
the tech, rather than saving your life. JMHO ...

PS... just what does having a rear seat have to do with anything?
it's the "six or eight point attachment" rule we're discussing right?

 

i want a cage, but not out the window.

 

or out the back, but removable for normal driving.

 

As far as the rulebook goes on rollbars....

It is pretty clearly printed that the brace bars (two requirred) MUST originate from a point off the main hoop "within 5" from the top of the bar".

As far as going through the back window....There is no requirement for any particular angle or degree or even a direction...only that the main hoop is to be "sufficciently braced to prevent forward movement"....
The brace bars could remain within the cab, simply run them forward from the top of the bar towards the floorboards. One obviously along the pass. side and one from the drivers side that goes along the roofline and then down by the dash to the floor (similar to a rollcage upper brace).. You will also need to have a second drivers side bar same as before (insecting the drivers body at the mid-point...) and a cross brace on the main hoop..


Anyway, bottom line is that there are no rules that say the bars have to go rearward, so an in-cab bar would be allowed.

 

Actaully that is completely untrue. The NHRA rules state the rear bars must be no less than 30 degrees from the main hoop. That is why on a standard cab truck, you have to go out the rear window. There is no room to stay over a 30 degree angle and still have it inside the cab. If you had crew cab truck like an HD truck, you could probably get away with because of all the extra in cab space behind the driver.

The reason you need the rear bars in the first place, is because the main hoop must be supported against forward and rearward collapse. Having rear bars under a 30 degree angle puts you at a great risk for not enough support against rear ward collapse.

 

Trying to think about how to do that and keep reasonable rear seating room...

 

How many HD's are running 11.49 or quicker that need the roll bar?

 

SO,

If I had a cage that looked something like this:



Maybe connected the two top bars following the top edge of the windshield, it wouldn't be legal?

With the price of rear glass and all, I don't know if it would cost any more.

 

LOL... stay tuned.

 

If you connected the two top bars across the windsheild, you'd have a legal CAGE for quicker then 10.00. Well, that's if you added the two rear bars as well .

 

Yes I-menace that would be a legal IHRA bar!
Sal, I don't have an NHRA book in front of me, but IHRA rules say nothing about 30 degrees...Even so, NHRA and IHRA DO NOT say that the brace bars need to go toward the rear!! They also say that the bracing should be sufficient to prevent FORWARD collapse...it does not say rearward collapse!!

So, my comments are not COMPLETELY untrue at all, Sal...IF NHRA says 30 degrees, fine add that into my statement, it doesn't change any of what I said!!

BTW, you do not need a pass side diagonal bar by the seat either, I-menace.


The brace bars could go forward as I said, from the top of the hoop at a 30 degree angle FORWARD to the floor...problem solved!!


I would like someone to provide a link to NHRA rules showing rollbar details.
As I said, I am positive that my idea is IHRA legal!!