LS2 VXR fuel tank location
Discussion
I read in a couple of places that the location of the fuel tank right over the rear axle, caused for some interesting handling with a half full tank? I guess on the public road, it'd be hard to find this out, but on a track, perhaps it's a valid point. I have an LS1 CV8 anyway, but was wondering if any of the LS2 with said fuel tank could comment?????
NO, is the simple answer, it is in the perfect place, for as you say it is directly over the axle, therefore the weight tranference that you get from an underbelly tank slung aft of the axle with it's pedlum affect is negated.
Well sounds good any way!
Hey roastbeef loved your Lords Prayer,, ha ha ha
Well sounds good any way!
Hey roastbeef loved your Lords Prayer,, ha ha ha
In theory, the best place (as with most things) is for the fuel tank is as near the centre of gravity as possible. That way the effect of the fuel tank full or empty has the same effect on both axles. Of course, it's easier said than done...
At least it's not like the Mirua with the fuel tank mounted over the front wheels! Understeer when empty and deathtrap when full!
At least it's not like the Mirua with the fuel tank mounted over the front wheels! Understeer when empty and deathtrap when full!
AMEN Slackalice!!
Cheers for the comments. I was thinking about this, and I could only ever see this being a problem if you were to take a shikane at mid/high speed causing 'tank slap'. The centre of gravity will be at a different point for every bend at every speed, no? But putting the fuel tank over the axle, would make the rear end unstable, if the weight of the fuel was being transferred from left to right, and vice versa very quickly. The end result being the drivers rear end becoming unstable too...
It's not important, but having dealt with tank slapo on a bike a few times, surely it makes a difference to the cars handling too?
Cheers for the comments. I was thinking about this, and I could only ever see this being a problem if you were to take a shikane at mid/high speed causing 'tank slap'. The centre of gravity will be at a different point for every bend at every speed, no? But putting the fuel tank over the axle, would make the rear end unstable, if the weight of the fuel was being transferred from left to right, and vice versa very quickly. The end result being the drivers rear end becoming unstable too...
It's not important, but having dealt with tank slapo on a bike a few times, surely it makes a difference to the cars handling too?
RoastBeef said:
AMEN Slackalice!!
Cheers for the comments. I was thinking about this, and I could only ever see this being a problem if you were to take a shikane at mid/high speed causing 'tank slap'. The centre of gravity will be at a different point for every bend at every speed, no? But putting the fuel tank over the axle, would make the rear end unstable, if the weight of the fuel was being transferred from left to right, and vice versa very quickly. The end result being the drivers rear end becoming unstable too...
It's not important, but having dealt with tank slapo on a bike a few times, surely it makes a difference to the cars handling too?
Cheers for the comments. I was thinking about this, and I could only ever see this being a problem if you were to take a shikane at mid/high speed causing 'tank slap'. The centre of gravity will be at a different point for every bend at every speed, no? But putting the fuel tank over the axle, would make the rear end unstable, if the weight of the fuel was being transferred from left to right, and vice versa very quickly. The end result being the drivers rear end becoming unstable too...
It's not important, but having dealt with tank slapo on a bike a few times, surely it makes a difference to the cars handling too?
If you discount fluids the centre of gravity is constant and does not change with the attitude or motion of the car.
hsv_rulz said:
I understand that the fuel tank is 'baffled' to reduce these effects.
yep - metal penels inside the tank with small holes to slow down the water and pevent it gathering momentum. the baffles also help prevent fuel starvation in long fast corners with low fuel in the tank.
the main problem is that a full tank is 70ish kgs whilst empty is obviously zero. Thats the same as an adult in the back. on a big long wheelbase car like monaro/vxr8 its' not so noticable as the weight is a relativle small percentage of the overall mass. modern suspension also helps reduce the problem
Bit of a tricky one that as you will not be able to run the standard dual exit exhaust system if you relocate tank back to original location of VY series versus VZ. I know a number of Vy owners looked at tyring to get a dual exit set up but tank was an issue. I saw a couple of conversions in the USA but they required major surgery to the rear end of the car
Not sure what perceived gains/benefits will result but I would bet in the real world probaly nothing other than what ever looks you may be after...
Not sure what perceived gains/benefits will result but I would bet in the real world probaly nothing other than what ever looks you may be after...
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