Custom roll cage and/or SFC's?
 

Ok... here's the question...

With a custom 6-point roll cage going into a convertible, would you add subframe connectors or simply rely on the cage to do all the chassis-stiffening? Would SFC's be unnecessary weight? We're looking at adding Kenny Brown DD's to a '99 SS convertible, but we're also positive that a custom roll cage will be going in.

Just to give you an idea, here's what we're about to install on the car:

1.) Stage II ARE heads
2.) 226/236 .568/.568 114 LSA cam
3.) LS6 intake
4.) 160-deg t-stat w/ fan switch
5.) Grot headers w/ ORP
6.) ASP UD & alternator pullies

So... bearing that in mind, do we just do the roll cage, or do both for added stiffening? Thanks in advance...

Re: Custom roll cage and/or SFC's?
 

I would say both. <img src="graemlins/camaro.gif" border="0" alt="[Chevrolet]" />

Re: Custom roll cage and/or SFC's?
 

You should do both and tie the cage to the SFCs.

Re: Custom roll cage and/or SFC's?
 

Agree with Jim98 all the way. But make sure the Grots won't interfere with the DD's before you do it.

Re: Custom roll cage and/or SFC's?
 

Excellent... that's what I was thinking. The previously mentioned components will be going in before the chassis mods, so we'll know if the DD's will be a problem. Thanks...

Re: Custom roll cage and/or SFC's?
 

When putting the 6-point bolt in in do you loose the rear speakers?

Re: Custom roll cage and/or SFC's?
 

His rollcage is a custom one.
He has a convertible, so his car and your car would be totally different regarding a cage.

Wolfe's cages require you to cut the rear speakers out.

Re: Custom roll cage and/or SFC's?
 

I always thought you just had to cut a hole in the panel and you would still be able to keep the speakers... <img src="gr_stretch.gif" border="0">

Re: Custom roll cage and/or SFC's?
 

http://www.wolferacecraft.com/images.../Rollcage3.jpg


Nope. See...
Rear speakers gotta go.

Re: Custom roll cage and/or SFC's?
 

Thanks <img src="gr_images/icons/wink.gif" border="0">

Re: Custom roll cage and/or SFC's?
 

If you're putting the cage all the way through (i.e. not welding to the floor pan), you may not need the extra weight of the subframes. I have both, but the cage is welded to the floor using the required NHRA plates.

6 Speakers <img src="images/icons/confused.gif" border="0"> We don't have no stinking six speakers in verts. <img src="gr_tounge.gif" border="0"> And don't give me that my Bi-amp BS that a 2 way counts as 2. <img src="gr_images/icons/wink.gif" border="0">

Nice set-up <img src="gr_stretch.gif" border="0"> We'll be pretty close when we're both done.

Re: Custom roll cage and/or SFC's?
 

I'm pretty sure the above picture of the cage is NOT NHRA legal. If I remember correctly the bars have to be straight back. (I could be wrong though)


Also not to mention that a truly "custom" cage can be made to not interfere with anything you don't want it to. That is a prefab cage in the pic.

Re: Custom roll cage and/or SFC's?
 

[quote]Originally posted by blackhawk2000:
<strong>I'm pretty sure the above picture of the cage is NOT NHRA legal. If I remember correctly the bars have to be straight back. (I could be wrong though)


Also not to mention that a truly "custom" cage can be made to not interfere with anything you don't want it to. That is a prefab cage in the pic.</strong><hr></blockquote>

Wolf claims that to make the bar legal all you have to do is weld the rear bars to the main hoop...
-Jim

Re: Custom roll cage and/or SFC's?
 

[quote]Originally posted by 99ragtopSS:
<strong>
Ragtop 99-your car is almost the same as mine. Same color, I have white top and interior.
</strong><hr></blockquote>

Plus I will have an ARE motor with S2 heads and a 226/226 114 cam so our motors are close too. <img src="gr_stretch.gif" border="0">

[quote]
So I should have the rollcage welded into the sub-frame...is that what the recommendation is?
<hr></blockquote>

I would if I were to do it again. originally I was going to do bolt-in, but decided to weld at the last minute. Otherwise I would have gone down to the subframe.


Welcome to the board. Allways glad to see another fast 'vert. <img src="gr_images/icons/cool.gif" border="0">

Re: Custom roll cage and/or SFC's?
 

The car we all are chatting about is my SS. Bluestreak posted for me.

Ragtop 99-your car is almost the same as mine. Same color, I have white top and interior.

So I should have the rollcage welded into the sub-frame...is that what the recommendation is?

Re: Custom roll cage and/or SFC's?
 

We Guessed on the cam in the original post the true specs are;

226/234 114 111 0.554 0.575

Realizing that the rear end needs to be changed...any recommendations...Strange or Mosler

Ragtop 99-have you replaced the rear end yet and what are you going to install if you havent already.

Re: Custom roll cage and/or SFC's?
 

[quote]Originally posted by Jim98WS6:
<strong>

Wolf claims that to make the bar legal all you have to do is weld the rear bars to the main hoop...
-Jim</strong><hr></blockquote>

What I mean is, that the bars should be parallel to each other. It's been a couple months since I helped with a cage install, and the bars we did were slightly angled outboard, and I remember being concerned over legality. I don't think anyone but the strictest track would call you on it, but it's something to be aware of.

Re: Custom roll cage and/or SFC's?
 

Here is an extract from IHRA rule book gen rules pg 121 on roll bar installation. This may help a little.


All vehicles with OEM frame must have roll bar welded to frame. Installation of frame connectors on unibody car does not constitute a frame therfore it is not necessary the roll bar be welded to the frame. cars without frame must secrely attach roll bar with 6 inch x 6 inch .125 steel plates on top and bottom of floor bolted together with at least four 3/8 inch bolts and nuts.

Doug

Re: Custom roll cage and/or SFC's?
 

Thank you PROMOD, your help is appreciated. <img src="graemlins/gr_angel.gif" border="0" alt="[angel]" />

Re: Custom roll cage and/or SFC's?
 

I went with a strange 12 bolt with 3.73s. I have an A4 and my stock rear was holding up, but I decided to switch when I decided to change gears. Decided I would pay for it just once. <img src="gr_images/icons/wink.gif" border="0">