Discussion
Slow M said:
Will you ever be racing?
If yes, review the sanctioning body's guidelines.
If you're SURE that you won't, bolt together should be OK as long as the tolerances are tight.
Maybe you can drill the holes with the cage in situ and ream them to size.
B
Track days and the odd sprint mainly,i'm just not sure how good the bolt together cages are.If yes, review the sanctioning body's guidelines.
If you're SURE that you won't, bolt together should be OK as long as the tolerances are tight.
Maybe you can drill the holes with the cage in situ and ream them to size.
B
Maybe best to talk to the manufacturer
I have some baling wire and chewing gum... 
BTW, why are you considering a bolt together frame?
While it'll be OK/good, a proper, welded type will be better in terms of safety/rigidity.
My reasoning on this point is that a fully welded structure will always let you go racing later. The cage I am planning will exceed requirements that the sanctioning organizations (that I'd consider ever racing with) have. While I don't see myself doing any wheel to wheel racing, I don't want to preclude that possibility by design.
B
BTW, why are you considering a bolt together frame?
While it'll be OK/good, a proper, welded type will be better in terms of safety/rigidity.
My reasoning on this point is that a fully welded structure will always let you go racing later. The cage I am planning will exceed requirements that the sanctioning organizations (that I'd consider ever racing with) have. While I don't see myself doing any wheel to wheel racing, I don't want to preclude that possibility by design.
B
hyperblue said:
stainless_steve said:
Ease of fit i guess,i think a fully weled cage would be more rigid too.Sent afew emails off,see what info i get back
Out of interest, who did you contact? I might be after a welded cage as well.http://www.exactly-tvr.demon.co.uk/ Adrian just deals with TVRs
hope it helps
Bolt together cages can be legal for just about any form of racing - as they are FIA legal. Here are the FIA regs for a cage for Production/Touring/Grand Touring/Super Production cars.
http://argent.fia.com/web/fia-public.nsf/7B8F07FBB...
Gary
http://argent.fia.com/web/fia-public.nsf/7B8F07FBB...
Gary
older thread -> http://www.pistonheads.com/gassing/topic.asp?h=0&a...
Hi Steve
Geronimo cages in Hartlepool will do a made to measure one (either bolt together or welded together then bolted to chassis at the feet, or cut holes in the tub floor and weld to plates which aere welded to the chassis) - see their web site - the TVR is mine. They said that due to the none standard measurments on a TVR they cannot guarantee good fit unless made to measure.
Have you checked your chassis to ensure good condition?
www.geronimocages.co.uk
I've hade to weld extra plated to the chassis for the cage legs to pick up -
base of A pillar and rear parcel shelf.
Mick
Geronimo cages in Hartlepool will do a made to measure one (either bolt together or welded together then bolted to chassis at the feet, or cut holes in the tub floor and weld to plates which aere welded to the chassis) - see their web site - the TVR is mine. They said that due to the none standard measurments on a TVR they cannot guarantee good fit unless made to measure.
Have you checked your chassis to ensure good condition?
www.geronimocages.co.uk
I've hade to weld extra plated to the chassis for the cage legs to pick up -
base of A pillar and rear parcel shelf.
Mick
most scrutes often prefer to see bolt in cages (some classes mandate them over weld in), as basically the bolts used are made to a known strength, ie 8.8, 12.9 etc which gives a guaranteed spec for strain and shear strength. In theory a welds as good or better but its not a visual check. Often a weld can look fine but be flawed and weak, or look sh*tty and yet be ok. A bolt head has the spec on it so will be of a known strength.
also weld in cages are a PITA for access. Its often quicker to remove a cage section for access to some godforsaken conmponent, then wait for the 3rd elbow required to grow! in event of a bump, just one section can be replaced easiliy too
little story when i had some cages made by Protection & Performance for some race cars (not TVRs), when i quizzed the main man Dan Evans re the strength, he just grinned and said his cages were a helluva lot stronger than anything we would be bolting them too! The CDS or chromolloy tubing mandated by the MSA/FIA, is mega strong compared to what my Tiv S2 chassis made of!
also weld in cages are a PITA for access. Its often quicker to remove a cage section for access to some godforsaken conmponent, then wait for the 3rd elbow required to grow! in event of a bump, just one section can be replaced easiliy too
little story when i had some cages made by Protection & Performance for some race cars (not TVRs), when i quizzed the main man Dan Evans re the strength, he just grinned and said his cages were a helluva lot stronger than anything we would be bolting them too! The CDS or chromolloy tubing mandated by the MSA/FIA, is mega strong compared to what my Tiv S2 chassis made of!
Hi Steve
I would have the cage feet on the tub floor and bolt through that to the plates on the chassis and through any metal/hard wood packers that were needed. That way the scrutineers can check how it is attached as if the legs just go through the floor and then welded to chassis plates they cannot confirm it is to Blue Book.
Mick
I would have the cage feet on the tub floor and bolt through that to the plates on the chassis and through any metal/hard wood packers that were needed. That way the scrutineers can check how it is attached as if the legs just go through the floor and then welded to chassis plates they cannot confirm it is to Blue Book.
Mick
magpies said:
Hi Steve
I would have the cage feet on the tub floor and bolt through that to the plates on the chassis and through any metal/hard wood packers that were needed. That way the scrutineers can check how it is attached as if the legs just go through the floor and then welded to chassis plates they cannot confirm it is to Blue Book.
Mick
And the other advantage of this over welding to the chassis is you can still lift the body off if you need to.I would have the cage feet on the tub floor and bolt through that to the plates on the chassis and through any metal/hard wood packers that were needed. That way the scrutineers can check how it is attached as if the legs just go through the floor and then welded to chassis plates they cannot confirm it is to Blue Book.
Mick
The Challenge car cages are welded together and bolted to the chassis as are the racing sags.
my taz cage was also bolted together. The bolted cage definetly doesnt add as much strenght to the chassis as it moves a little at all of the connections... a few drops of weld as well as the bolts stiffened the taz cages up quite a lot.
being able to take the body and cage off he chassis is a good idea, so I'd go welded cage, bolted into the car..
my taz cage was also bolted together. The bolted cage definetly doesnt add as much strenght to the chassis as it moves a little at all of the connections... a few drops of weld as well as the bolts stiffened the taz cages up quite a lot.
being able to take the body and cage off he chassis is a good idea, so I'd go welded cage, bolted into the car..
Graham said:
The Challenge car cages are welded together and bolted to the chassis as are the racing sags.
my taz cage was also bolted together. The bolted cage definetly doesnt add as much strenght to the chassis as it moves a little at all of the connections... a few drops of weld as well as the bolts stiffened the taz cages up quite a lot.
being able to take the body and cage off he chassis is a good idea, so I'd go welded cage, bolted into the car..
Cheers Graham,that's what i was thinkingmy taz cage was also bolted together. The bolted cage definetly doesnt add as much strenght to the chassis as it moves a little at all of the connections... a few drops of weld as well as the bolts stiffened the taz cages up quite a lot.
being able to take the body and cage off he chassis is a good idea, so I'd go welded cage, bolted into the car..
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