Polybushes - one p**** off customer
Discussion
SILICONEKID340HP said:
M@H said:
Mine is a Hoop-ish design and far from useless - two intersecting loops therefore giving excellent cross bracing across the car as well as maximum height above the drivers head (the hoop sits about 5mm below the inside of the roof hoop.
It also uses the bottom rear body mount and the seatbelt mounting hole to bolt through therefore you can retain the standard steatbelt mounts too. Its a custom build by a friend however so not commercially available.
Edited to add - Yes that TR Lane hoopy one looks a bit
Cheers,
Matt.
Can you get any more made up..Ive been offered a new TR lane type but the more i look at it the more it puts me off,the bar is very close to the side and top of your head,perfect when wearing a helmet but would give me a enclosed feeling.Would be nice to get one the same as yours,all kept behind the seats.How much leg room do you loose,it does not concern me because my seat is quite far forward but my son is 5FT 11"..and there is not to much room at the moment.It also uses the bottom rear body mount and the seatbelt mounting hole to bolt through therefore you can retain the standard steatbelt mounts too. Its a custom build by a friend however so not commercially available.
Edited to add - Yes that TR Lane hoopy one looks a bit
Cheers,
Matt.
I realise thats not over useful.
Matt.
!
SILICONEKID340HP said:
Im 5ft 8" with out stilettos on my son is 5ft 11 ..he would have to live with it..could relocate the battery in the future..
I will have to disappoint I am afraid - I am very happy/lucky to have a "one off" made by a friend in my car and he is happy for me to have it, however when you manufacture safety products for other people there is a massive can of worms ready to be opened which I know he wouldn't really be wanting to wade into.Seriously O/T, apologies OP.
Daz.
Mine sits further forwards but is higher.
2nd pic is a manakin called Alex.
These are Elise seats that sit low.
Your standard Sierra sears are at least 2" higher.
3rd pic is the twin hoop design that I didn't keep for obvious reasons. It had standard seats in that shot!
Daz.
Mine sits further forwards but is higher.
2nd pic is a manakin called Alex.
These are Elise seats that sit low.
Your standard Sierra sears are at least 2" higher.
3rd pic is the twin hoop design that I didn't keep for obvious reasons. It had standard seats in that shot!
SILICONEKID340HP said:
Thanks for that,still trying to work out if you would hit yor head on a side imact or a shunt ..wounder why the bars are not set back a little..I think this roll bar is designed for track use with a helmet.Can you do a side shot with the Manikin in the seat cheers.
The manakin has gone home, I'll try and find a dummy tomorrow!
This is interesting...and a bit scary..
http://www.pistonheads.com/gassing/topic.asp?h=0&a... bar, yay or nay?
http://www.pistonheads.com/gassing/topic.asp?h=0&a... bar, yay or nay?
SILICONEKID340HP said:
This is interesting...and a bit scary..
http://www.pistonheads.com/gassing/topic.asp?h=0&a... bar, yay or nay?
Quite. There just isn't enough room in a TVR to do the job properly, unless you are very short. IIRC the RAC recommendation was for 6" clearance above your helmet. Most of the hoops shown don't even have the clearance above the head. You need this clearance because in an accident things will stretch and distort a lot.http://www.pistonheads.com/gassing/topic.asp?h=0&a... bar, yay or nay?
heightswitch said:
slideways said:
heightswitch said:
slideways said:
heightswitch said:
slideways said:
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regards andy(APM)Thanks Andy i will take a look.
I hate posts like this one.APMAUTO said:
slideways said:
I would like to look at getting a full rollcage for the Chimaera, the sort of thing that Cerberas have but one that is not too intrusive in the cabin. i have done a search and and found a couple but to be honest they look a bit unwealdy.
so has any one done any reasearch into this subject?
Pictures would be great if you have them.
try speaking to andy robinson at www.robinson-race-cars.co.uk one of the best fabricators in the uk did our cage in the gt cup cerbera and also made suspension parts we needed,heavily into drag racing so you wont find safer or better!so has any one done any reasearch into this subject?
Pictures would be great if you have them.
regards andy(APM)
are you going to race?
Are you going to use 4 / 6 point harnesses and a helmet?
a cage has to be built to a spec and generic minimum design then certified. This is a lot diferent to putting some tubes in a road car that won't save your life in a crash and may well end it prematurely.
Andy robinson is one of many good fabricators out there who can install a custom made cage for you but a cage should always be used in conjunction with the other 2 items. You need to be very specific with what you mean by "intrusive"
the whole point of the post is to discuss options, the fact that i stated rollcage should tell you i'm not after the usual bar that may not stand up in a roll as the screen could collapse,
i will want to track the car but probably not full on race as it is a road car
and will use a 4 point harness,
the comment on intrusiveness was aimed at still being able to get in and out of the car without being hudini
How many road cars have you rolled?
As an alternative thought how many times have you been involved in a rear end shunt minor bump etc but remained in the upright position. Its all well and good building the compromise car for the odd track day but if you drive said car on road more than you track it then you should be considering whether you are putting yourself at greater risk due to the imbalance in frequency of track / road driving?
the cage undoubtedly saved his life but could also have killed him in the process.
where i am coming from is something to stop total collapse if the worst should happen but not kill you in a normal accident senario. if that makes scence?
If you are tracking your car you are essentially driving alone on a track and passing people in a safe controlled manner. All your cage is going to do in your road car is make you slower because they are heavy.
A cage in a chim or griff which retains the roof will certainly be very close to your head. a door bar will be very low to allow you access which also means it will have diminished purpose. top rails built to remain in a roof will skim your tempral lobe. you will find that any decent fabricator will refuse to make what you want. because what you want will not save your life in a crash
My view is that you have a road or a race car but not both.
A road car with compromised race bits is possibly dangerous.
A road car with a fully trimmed cage built into the structure would be prohibitavely expensive
at the end of the day it is your car and you are free to do what you want but in my opinion a compromise cage in a compromise car will only do both things worse than going one way or another.
I know Andy Race has a road registered race griff so he would be your first call to look at what he has done. i am pretty sure he will have a similar opinion to mine though that the use of the car is foremost.
A good friend of mine had to examine a TVR to assist the police after a survivable rear end shunt cause the death of the Drivers daughter who was a passenger at the time of the accident. The cause was the daughters head being thrown back into the cage.
This is why I have such strong opinion on race cages and road cars which become neither one thing or another.
An interesting read and I do agree with most of that. However I have always been of the understanding that if you have a roll bar behind the seats AND you are secured using a harness then this is safe for road use. There are of number of factory cars that have these fitted:
Similar bar fitted behind the seats of a Tiv:
Similar bar fitted behind the seats of a Tiv:
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