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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
Last edited by corvettedave383; Aug 31, 2018 at 01:56 PM.
Reason: add pic
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.
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.
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!
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!
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.
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.
ok good point, yep get a bar across dash now, i cant move the front down tubes, its all welded in there now, these ones going forward into engine bay , should finish it off nicely
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.
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.
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.
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
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.
Last edited by Pop Chevy; Sep 1, 2018 at 03:08 PM.
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.
iam going to get the forward tube going into engine bay high up, around 3 inch below bottom of window screen and then come down to frame just behind the front arms and infront of engine mounts, no point in attaching to front horns, they are just really weak looking - my side bars are fine in the UK for my track racing, if you start adding more door bars, going to be a right pig to get in and out of
Roll cage forward tubes/engine bay
