I have a few questions about Corbeau seats. I'm about to buy a set of leather TRS seats with sliders. Installing the seats isn't a problem, I'm concerned about seat belts. The seats are going into a 95Z with t-tops. I plan on taking the car to school sometimes and out on the weekends, so I do want it to be somewhat confortable getting in and out. The downside is it will also see tracktime, having a worked 383 with nitrous I should be able to break the new NHRA rule of 11.50 or faster thus needing a roll cage. I was thinking about installing a Wolfe 6point cage with the bent door bars, and the cross bar. The only way I can see to have a good set of belts with corbeau seats is bolting them to the crossbar for the cage. This is where the problem comes in, since the car will be on the street, I will sometimes want to use my back seat. To all that have a crossbar do you lose the use of your backseat? If I was to use the stock style belt system I wouldn't want to screw the seat belt guide into the new seat. Is there any other way to have a seat belt with an aftermarket seat without bolting a 5point system to a roll cage? Any suggestions would greatly be appreciated,
Jason

I also would like to know the difference between the standard style rear bars and those that are over the seat. The ones that don't go over the seat where do they weld into? I seeing this option at http://www.tbyrnemotorsports.com

Sorry if this is in the wrong section.

 

NHRA requires a 5-point roll bar in convertibles from 11.00-13.49. In full-bodied cars (stock firewall, floor, body) it is 10.00-11.49. That is what Wolfe sells as a roll bar. A roll cage is required below 11.00 in convertibles and any vehicle with an altered firewall, floor and body, and a cage is much more complicated than a 6-point bar (below 10.00 in a stock firewall/floor/body enclosed car).

For an NHRA roll bar, there must be a cross-bar mounted no higher than the drivers shoulders, and no lower than 4" below the drivers shoulders. The cross-bar can not be "removable".

Once your car is required to have a roll bar or a roll cage, it must be equipped with a 3" shoulder harness meeting SFI-16.1 (Gen Requirements 10:5). The harness has to attach to the cross-bar.

When you go to an "aftermarket seat", it must be anchored to the frame and braced to the cross-bar. It can not have a "slider" unless it meets the NHRA requirement of "double locking". This can be a real problem in a 4th Gen. At most tracks I have been to, they have not said anything about the fact my Corbeau Forza is bolted to a Corbeau non-double locking slider, that is in turn mounted to the stock floor seat mount studs, nor have they made an issure of the fact the seat was not bolted to the cross-bar. As soon as you reach the "roll cage" level, they will enforce all of those rules without question.

The only place where I can find "t-tops" mentioned in the 2005 NHRA Rulebook is for the ET classes, 7.50 and slower, Section 1A, part 4:Frame.

"ROLL BAR

Roll bar mandatory in all cars (including t-tops) running 11.00 to 11.49, in convertibles running 11.00 to 13.49...... (then it starts talking about dune buggies)".

"ROLL CAGE:

Roll cage mandatory in cars running 10.99 or quicker or any car exceeding 135mph. In full-bodied cars with unaltered firewall, floor and body running between 10.00 and 10.99 roll bar permitted in place of roll cage. In convertibles running 10.99 or quicker or exceeding 135mph, roll cage mandatory....."

It appears to me, there are only two types of cars.... convertibles and full-bodied.

 

Thanks for the quick reply and all the information, most of those rules I didn't know. I saw you have a roll bar/cage in your car how hard is it to get in the back seat, is it even possiable?

Thanks again,
Jason

 

What back seat ?

When the seat was still there, you had to crawl under the cross-bar. It wasn't easy.

A friend of mine ran has 30th SS convertible all the way to 10.00 with a "pin-in" removable cross-bar (again, depends how tought the track tech is). That made it a lot easier to get in the back.