Roll cage forward tubes/engine bay
#1
Burning Brakes
Thread Starter
Roll cage forward tubes/engine bay
Roll cage forward tubes/engine bay - 1978 corvette - used on race track only
so i was thinking, since my engine was out and new lsx waiting to go in, I was considering weather there is any real benefit to putting some roll cage tube extensions into the engine bay, onto engine bay chassis legs, upto the engine mounts from my roll cage , make a triangle if you like , would it help stop or reduce front twisting when cornering hard on race track or does the shape of the chassis or engine mounted in car, all help to reduce that issue, or my full roll cage is more than enough, whats everyones thoughts on this?
blue arrow indicates where tube would start, then going forwards into engine bay chassis legs
cheers guys
so i was thinking, since my engine was out and new lsx waiting to go in, I was considering weather there is any real benefit to putting some roll cage tube extensions into the engine bay, onto engine bay chassis legs, upto the engine mounts from my roll cage , make a triangle if you like , would it help stop or reduce front twisting when cornering hard on race track or does the shape of the chassis or engine mounted in car, all help to reduce that issue, or my full roll cage is more than enough, whats everyones thoughts on this?
blue arrow indicates where tube would start, then going forwards into engine bay chassis legs
cheers guys
Last edited by corvettedave383; 08-31-2018 at 01:56 PM. Reason: add pic
#2
cars including ours are designed to crumple under impact, I would be hesitant to do any mods to the roll cage that are not indicated. general advice since you forgot to mention the year.
#3
Burning Brakes
Thread Starter
#5
ahh its a custom built cage? the few ones ive worked with were the bolted ones that affix to the frame and had full lateral and vertical support. heres a kit that I think is similar to the design your going for, best of luck!
https://www.jegs.com/i/Competition-E.../3300/10002/-1
https://www.jegs.com/i/Competition-E.../3300/10002/-1
#6
Burning Brakes
Thread Starter
ahh its a custom built cage? the few ones ive worked with were the bolted ones that affix to the frame and had full lateral and vertical support. heres a kit that I think is similar to the design your going for, best of luck!
https://www.jegs.com/i/Competition-E.../3300/10002/-1
https://www.jegs.com/i/Competition-E.../3300/10002/-1
Last edited by corvettedave383; 08-31-2018 at 03:14 PM.
#7
Race Director
#8
Burning Brakes
You should start higher up. You got no triangulation to the forward frame from that point. There should be a bar across the dash, too. Get that useless dash out of the way and move the down tubes towards the firewall.
#9
Burning Brakes
Thread Starter
thanks
#10
Melting Slicks
If You can find a copy of the Chevy Power Manual from back in this Era it has drawings and surjections on how to construct a Cage. It would have a diagram showing just whats needed to answer Your original question.
#11
Race Director
This thread has decent pictures..
https://www.corvetteforum.com/forums...-drag-car.html
Good pics in Neil B's build thread:
https://www.corvetteforum.com/forums...-build-11.html
https://www.corvetteforum.com/forums...-drag-car.html
Good pics in Neil B's build thread:
https://www.corvetteforum.com/forums...-build-11.html
Last edited by jim2527; 09-01-2018 at 09:07 AM.
#14
Team Owner
#15
Team Owner
Even if it had very little angle going forward it would be better than nothing. With the big vacuum canister on one side I always considered a bar going forward like you and attaching it on the rise area by the upper A-arm mounts. I did lots of the front cross over mount gusseting and around the bottom of the frame where the lower a-arms attach. On the frame it's self I welded the length.
You need to check the rule book for your side bars. Here they need to cross the shoulder at 45 degrees and they want an X in the door, or dual parallel. You need a 45 degree from the passenger side low to the top behind the drivers head.
You need to check the rule book for your side bars. Here they need to cross the shoulder at 45 degrees and they want an X in the door, or dual parallel. You need a 45 degree from the passenger side low to the top behind the drivers head.
#17
Burning Brakes
Thread Starter
ahh thats interesting, had my mate/rollcage man round today deciding what we were going to and he looked the front section, where its in your pdf, those gussets are exact what we thought would be a good idea, also my front horns, are cracked alittle on the top vertical part, so the sway has been putting alot strain on the horns, thats great info many thanks
#18
Safety Car
Member Since: Apr 2001
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I ran my forward bars out through the hole for the fuse box on left and through the hole for the heater on rt. Ended them right behind the upper a arm mount as per the rule book. (SVRA).
No they are not real high but still feel they will help stiffen up the front clip.
Yes, you should box in the frame horns and tie into the front crossmember.
No they are not real high but still feel they will help stiffen up the front clip.
Yes, you should box in the frame horns and tie into the front crossmember.
Last edited by Pop Chevy; 09-01-2018 at 03:08 PM.
#19
Burning Brakes
Thread Starter
Even if it had very little angle going forward it would be better than nothing. With the big vacuum canister on one side I always considered a bar going forward like you and attaching it on the rise area by the upper A-arm mounts. I did lots of the front cross over mount gusseting and around the bottom of the frame where the lower a-arms attach. On the frame it's self I welded the length.
You need to check the rule book for your side bars. Here they need to cross the shoulder at 45 degrees and they want an X in the door, or dual parallel. You need a 45 degree from the passenger side low to the top behind the drivers head.
You need to check the rule book for your side bars. Here they need to cross the shoulder at 45 degrees and they want an X in the door, or dual parallel. You need a 45 degree from the passenger side low to the top behind the drivers head.
#20
Burning Brakes
Thread Starter