Ventross Carbon Fiber Parts
01-07-09, 10:29 PM
#46
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When you say not painted do you mean not clear coated? None of the parts on the MotorworldHype.com IS-F were painted we just clear coated them...but they look black because the paint shop mixed in too much smoke into the clear coat.
I'm not sure if I can get any pictures of it without the clear coating but I'll try.
01-07-09, 10:29 PM
#47
Lexus Champion
Does it have to be painted in clear coat ect, or can it be fitted straight from the manufacturer?
01-08-09, 05:21 AM
#49
01-08-09, 05:29 AM
#50
OoO Andy posted better prices. That CF Bootlid is oh so sexy.
everytime i look at the F, I just wanna trade my 250 in for it
everytime i look at the F, I just wanna trade my 250 in for it
Last edited by nabbun; 01-08-09 at 05:32 AM.
01-08-09, 07:15 AM
#51
Question for you guys regarding carbon fiber hoods and trunk lids. OEM parts have designed crumple zones in them so in the event of an accident they fold up. What would happen to the carbon fiber hood in an accident does it turn into a horizontal guillotine and decapitate the occupants, or would you expect it fold up?
01-08-09, 08:15 AM
#52
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Question for you guys regarding carbon fiber hoods and trunk lids. OEM parts have designed crumple zones in them so in the event of an accident they fold up. What would happen to the carbon fiber hood in an accident does it turn into a horizontal guillotine and decapitate the occupants, or would you expect it fold up?
But usally the outer shell just breaks apart while the carbon weaving can sometimes stay together..
All depends really... Generall speaking CF parts and accidents don't mix well.
Joe Z
01-08-09, 10:25 AM
#54
Neither in most cases.. I would say explode into a bunch of little pieces for a heavy impact..
But usally the outer shell just breaks apart while the carbon weaving can sometimes stay together..
All depends really... Generall speaking CF parts and accidents don't mix well.
Joe Z
But usally the outer shell just breaks apart while the carbon weaving can sometimes stay together..
All depends really... Generall speaking CF parts and accidents don't mix well.
Joe Z
Last edited by hwy1isf; 01-08-09 at 12:59 PM.
01-08-09, 12:47 PM
#55
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QFT. Every time I've brought this up on a board I've been inundated with replies telling me what an overzealous safety nut I am. But you are exactly correct - energy dissipation is based on the OEM's original panels being in place and absorbing impact. CF doesn't do this the same way, so the crash test results from the government no longer apply when you've changed the base material for the body panels.
01-08-09, 01:43 PM
#56
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QFT. Every time I've brought this up on a board I've been inundated with replies telling me what an overzealous safety nut I am. But you are exactly correct - energy dissipation is based on the OEM's original panels being in place and absorbing impact. CF doesn't do this the same way, so the crash test results from the government no longer apply when you've changed the base material for the body panels.
01-08-09, 02:06 PM
#57
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There are two critical features to hood design. First is not becoming a guillotine. All Toyota vehicles have hooks at the hinges to prevent this. Some cars have the hooks integrated into the hinge, others have separate hooks to catch the back edge of the hood and force it to crumple instead of shearing the bolts holding the hood to the hinge and sending the hood directly through the windshield to potentially decapitate the front seat occupants.
Part two is energy absorption. While it is true the hood is aluminum, remember the strongest any metal object can be is in compression, and when you try to compress sheet metal from the edge, it will resist with more force than any other direction.
So the rub is, the hinges and hooks are designed to accommodate an aluminum hood in compression. Carbon fiber in compression is vastly stronger than aluminum. Look at the 25 mph crash tests done on the McLaren F-1 - the car was unfazed by the impact, and it transferred all the energy throughout the car. This is great for the F-1, but not great for a car designed to arrest the hood's rearward motion with a pair of hinge/hooks and force it to crumple and absorb energy. The CF hood will not shatter, it will transfer a whole lot more force to the hinge/hooks before it cracks and dissipates energy. Without testing, it's not possible to say if the hinge/hooks will be sufficiently strong to prevent the hood from shearing and entering the passenger compartment. Also, because of the relative rarity of CF as a hood material in accident statistics, we may not be aware of the frequency a CF hood doesn't behave properly and actually adds injuries to an accident.
So, what is really happening in accidents isn't tracked unless there is a fatality causing someone to sue an aftermarket manufacturer for faulty design. At the end of the day, without testing, the public won't know if there is an undue risk. The hood manufacturers aren't doing any testing because it would require they destroy a number of cars for each model they produce which would make the parts too expensive for all but the most affluent buyers.
Part two is energy absorption. While it is true the hood is aluminum, remember the strongest any metal object can be is in compression, and when you try to compress sheet metal from the edge, it will resist with more force than any other direction.
So the rub is, the hinges and hooks are designed to accommodate an aluminum hood in compression. Carbon fiber in compression is vastly stronger than aluminum. Look at the 25 mph crash tests done on the McLaren F-1 - the car was unfazed by the impact, and it transferred all the energy throughout the car. This is great for the F-1, but not great for a car designed to arrest the hood's rearward motion with a pair of hinge/hooks and force it to crumple and absorb energy. The CF hood will not shatter, it will transfer a whole lot more force to the hinge/hooks before it cracks and dissipates energy. Without testing, it's not possible to say if the hinge/hooks will be sufficiently strong to prevent the hood from shearing and entering the passenger compartment. Also, because of the relative rarity of CF as a hood material in accident statistics, we may not be aware of the frequency a CF hood doesn't behave properly and actually adds injuries to an accident.
So, what is really happening in accidents isn't tracked unless there is a fatality causing someone to sue an aftermarket manufacturer for faulty design. At the end of the day, without testing, the public won't know if there is an undue risk. The hood manufacturers aren't doing any testing because it would require they destroy a number of cars for each model they produce which would make the parts too expensive for all but the most affluent buyers.
01-08-09, 03:06 PM
#59
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I think this thread has become way to pessimistic. I understand looking out for people but c'mon. CF hoods have been used for years and all of a sudden we are discussing whether or not to buy one b/c it may or may not shear our heads off?!?!
