Rollcage (i searched)

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Spoonage

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Searched; Rollcage, Roll cage.

When purchasing a rollcage the scrolling information below mentions something about causing understeer (i dont have gt4 in front of me)

A rollcage is supposed too protect the driver when a car rolls, GT4 doesnt need this (obviously)

But a rollcage can also stiffen the chassis, correct?

My question is, if the scrolling text says cars are prone too understeer, and you can not roll your car and kill your driver,

then why should i install a rollcage??

Are thier only only certain cars that would understeer? how would i know which cars?

thanks
 
It reduces understeer not increases it. It stiffens up the car so it can corner faster.
 
Spoonage
Searched; Rollcage, Roll cage.

When purchasing a rollcage the scrolling information below mentions something about causing understeer (i dont have gt4 in front of me)

A rollcage is supposed too protect the driver when a car rolls, GT4 doesnt need this (obviously)

But a rollcage can also stiffen the chassis, correct?

My question is, if the scrolling text says cars are prone too understeer, and you can not roll your car and kill your driver,

then why should i install a rollcage??

Are thier only only certain cars that would understeer? how would i know which cars?

thanks
Click to expand...

You should install it because:

1.It stiffens the chassis for more responsive cornerning.

2.By stiffening the chassis it reduces frame bending thus not having to spend 50K on a body refresher plan every 10 races.
 
Thats exactly what i thought live4speed, although I just turned GT4 on too double check i wasnt posting nonsense

Quote from the scrolling text : " installing this may result in an increased tendency to understeer depending on the car"
 
Spoonage
Quote from the scrolling text : " installing this may result in an increased tendency to understeer depending on the car"
Click to expand...

GT4 isn't live for speed.

Yeah...it will understeer if you go into a hairpin at 100 mph in a FWD car.

It is probably talking about FWD cars understeering more.
 
MachOne
GT4 isn't live for speed.

Yeah...it will understeer if you go into a hairpin at 100 mph in a FWD car.

It is probably talking about FWD cars understeering more.
Click to expand...

I was referring too the member "live4speed".

And it "probably" was referring too FWD cars, but it didnt state anything about FWD
 
Okay I haven't installed a rollcage more than a couple of times but I would agree that it DOES increase understeer slightly, and I've never tried it in a FWD car. The effect is usually minimal, and the benefit is usually hard to notice too, though I have in one case installed this and found the car to be undrivable into turns (Nissan Skyline Coupe (Infiniti G35)).
 
The "understeer" reference in the scrolling message is yet another GT4 glitch, as near as I can tell. Just ignore it completely. It's a silly bit of bad information.

Every single car that I have installed the "Increase Rigidity" option on has handled better as a result. Even the fine-handling Pescarolo race cars get significantly better with the option applied. On those cars, their slight understeer was reduced, not increased.

On the other hand, the tendency of the Jaguar XJR-9 to oversteer was improved with the rigidity option. Go figure.

I have never seen the option have a negative effect on any car, including all types of production cars. Whether or not it increases the interval between the appearance of the Rigidity Refresh Option's availability is still an open question.
 
As far as the handling goes, I haven't noticed the tendancy to oversteer, either.

Now, as to the claim, I can see how the physics might support it. Without the increased rigitiy added by a roll cage, a car's body will twist slightly in a front engine car because there's more weight in the front, meaning that the g-forces will make the front of the body roll over slightly more than the rear. Adding the roll cage increases the rigidity, which in turn transfers some of the roll over to the rear tires. If you're on the edge of the rear wheels breaking free, this little extra transfer could break their grip, giving an oversteer tendency.

Of course, I'm no physicyst, so I could be way off the mark.
 
well i installed one in my brand new Jaguar xk9 race car job that i won for 50% and it made this thing handle like a sausage with wheels, man this is a poo car to drive now, but i fear i may have baught one for my BMW and its done the same, do you guys know of a way to get rid of um or is it a new car.
 
sprite
well i installed one in my brand new Jaguar xk9 race car job that i won for 50% and it made this thing handle like a sausage with wheels, man this is a poo car to drive now, but i fear i may have baught one for my BMW and its done the same, do you guys know of a way to get rid of um or is it a new car.
Click to expand...

im in total agreement with you there. i fitted one on my maxed out nismo 400r, and it totally ruined the beauty 'cos it now handles like a bag of spanners!
im sure the rollcage wasnt the only thing welded into place, 'cos the front wheels seem to be locked straight! damn thing wont turn around corners at all.
as for removing the rollcage, forget it! its there for good. 250,000+cr down the pan...:ouch:

my advice is dont risk it. 50,000cr every now and then is a price im willing to pay.
 
sprite
...well i installed one in my brand new Jaguar xk9 race car job that i won for 50% and it made this thing handle like a sausage with wheels, man this is a poo car to drive now...
Click to expand...

Not the result I got, that's for sure.

Did you try it first without the Increased Rigidity option? Its an oversteering driftmobile without it.

Did you turn off ASM?
 
Actually it can increase the tendency to understeer, sort of like like what Mld0806 said but in reverse. While turning the body of a car will indeed flex, which well actually allow the front wheels to bite a bit better in a somewhat constant turn. If you stiffen the chassis it will allow the front wheels to lose their grip as there is less flex in the chassis to keep them planted. I'm not explaining it very well, but that's basically the concept. It's sort of like sliding a block of wood over a rough surface compared to sliding a wet sponge (neglecting the different coefficients of friction, obviously). The wet sponge will naturally have greater contact with the surface as it can flex with the surface. Anyway, it can be tuned out by loosening up the suspension a bit among a few other things, so it won't completely ruin the car. I'm sure it doesn't have an adverse effect on all of them, but I'm sure it can on some. I havent' tried it yet so I can't speak from experience, but that's the theory behind it.
 

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