I have an 87 conv iroc and i seen a few pics with other 3rd gen conv with roll bars. When do you need a roll bar?(The other conv had 383's and up)

 

...if you roll over...if you dont want to twist the body with gobs of torque...it looks cool...because you can...

 

A convertible requires a roll bar when it's quicker than 13.99 in the 1/4 mile. Everyone else doesn't need one until 11.99

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Follow my racing progress on Stephen's racing page
and check out the race car

87 IROC-Z Pro ET Bracket Race Car
383 stroker (carbed) with double hump cast iron heads and pump gas
461 Big Block installed and ready for the 2001 racing season

Best results before the 383 blew up
Best ET on a time slip: 11.857 altitude corrected to 11.163
Best MPH on a time slip: 117.87 altitude corrected to 126.10
Altitude corrected rear wheel HP based on power to weight ratio: 476.5
Best 60 foot: 1.662

Racing at 3500 feet elevation but most race days it's over 5000 feet density altitude!
Member of the Calgary Drag Racing Association

87 IROC bracket car, 91 454SS daily driver, 95 Homebuilt Harley

 

Do you use the roll bar along with subframe connectors or its your choice of either? If its your choice which one is better?

 

You should have both. The SFC join the front and rear subframes together making the chassis stiffer. The roll bar is welded to plates that are welded to the floor. The roll bar will keep the body frome flexing.

If all you can afford is one item then get the SFC. If your ET doesn't require you to have a roll bar then it's just added weight. It will help some but not as much as you would expect. My roll bar is 70 pounds.

 

Hey STEPHEN87IROC, How much did your big block cost you to build?

 

Stephen87iroc what type of roll bar do you have and this is for street use?